Ascott Manual S Ip Range

1

Salt Spray Test

Chamber Models:

S120/450/1000/2000iP

(Original Instructions)

Ascott Analytical Equipment Limited,

Unit 6 Gerard, Lichfield Road Industrial Estate, Tamworth, Staffs. B79 7UW Great Britain

Telephone: +44 (0) 1827 318040 Fax: +44 (0) 1827 318049 E-Mail: [email protected] Website: www.ascott-analytical.com

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Contents

Part 1: Health and Safety

Part 2: Installation

Part 3: Operation

Part 4: Care & Maintenance

Part 5: Optional Accessories

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Introduction - General Description

of machine operation

Part 1 - Health & Safety

1.1 Health and Safety Policy

1.2 Transporting and Lifting

Part 2 - Installation

2.1 Operating Environment

2.2 Positioning

2.3 External Services

2.3.1 External Utilities

2.3.1.1 Compressed Air Inlet

2.3.1.2 De-ionised Water Supply

2.3.1.3 Electrical Supply 2.3.1.4 Salt Solution Reservoir

2.3.1.5 Exhaust and Drains

2.3.1.5.1 Condensate Drain

2.3.1.5.2 Air Saturator Drain

2.3.1.5.3 Exhaust Vent to Atmosphere

2.3.1.5.4 Chamber Base Drain

2.4 Atomiser Set up

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Part 3 - Operation

3.1 Help 3.1.1 Human Machine Interface (HMI) Screen

3.1.2 Contact Details

3.2 Set up

3.2.1 Initial Power Up – Ascott Main Menu

3.2.2 User Access

3.2.3 Settings – Supervisor Mode 3.2.3.1 Set Password

3.2.3.2 Set Holdback 3.2.3.3 Set Air Saturator Temp

3.2.3.4 Set Pump speeds (Vertical)

3.2.3.5 Set Purge Time

3.2.3.6 Disable Alarm Sounder

3.2.3.7 Calibration

3.2.3.8 Set Ramping

3.2.3.9 Power Fail Recovery

3.2.3.10 Set Test Type

3.2.3.11 Air Saturator Fill Method

3.2.3.12 Set Background Colour

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3.3 Programming

3.3.1 Program Menu

3.3.2 Edit Program

3.3.2.1 Editing Program

3.3.2.2 Open Program

3.3.2.3 Step Number

3.3.2.4 Mode

3.3.2.5 Program Functions

3.3.2.6 Step Temperature Set Value

3.3.2.7 Step Time Set Value

3.3.2.8 Step Relative Humidity Set

3.3.2.9 Saving/Cancelling an Edited Program

3.3.2.10 Program Repeats

3.3.2.11 Save

3.3.2.12 Save as

3.3.3 Program View

3.3.4 Program Delete

3.3.5 Example CCT Program

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3.4 Chamber Operation

3.4.1 Running a Program 3.4.1.1 Main Menu

3.4.1.2 Program Load

3.4.1.3 Program Run

3.4.1.4 Program Stop

3.4.1.5 Program Pause

3.4.1.6 Program Fast Forward

3.4.1.7 Run Settings

3.4.1.8 Trending

3.4.1.9 Total Chamber Hours

3.4.2 View Running Program 3.4.2.1 Step Number

3.4.2.2 Step Function

3.4.2.3 Step Temperature

3.4.2.4 Step Time

3.4.2.5 Step

3.4.2.6 Program Run Time

3.4.3 Canopy

3.4.4 Air Saturator Mode

3.4.5 Message Bar

3.4.6 Controls

3.4.6.1 Emergency Stop

3.4.6.2 Air Pressure Gauge & Regulator

3.4.6.3 Flow Meter(s) & Peristaltic Pump(s)

3.4.7 Setting Up Procedure

3.4.7.1 Determine the test parameters

3.4.7.2 Set up chamber

3.4.7.3 Set the Salt Fog Fallout Rate

3.4.8 Shut down procedure

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3.5 Alarms 3.5.1 Alarm Status

Part 4 – Care & Maintenance

4.1 Routine Maintenance 4.1.1 Daily Checks

4.1.2 After Use

4.1.3 Weekly Maintenance

4.1.4 Three–Monthly Maintenance

4.2 Unscheduled Maintenance 4.2.1 Storage & Contamination

4.2.2 Deionised Water Inlet Filter

4.2.3 Clean or Unblock Salt Spray Atomiser

4.2.4 Maintenance & Replacement of Humidity sensor

4.3 Sample Daily Check Sheet

Part 5 – Fault Finding and

Problem Solving.

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Introduction - General

Description of machine operation

The Salt Spray test (also know as a salt fog or salt mist) has been

the benchmark corrosion test in many industries for decades

The Ascott Salt Spray chambers (iS) meet the requirements of

basic, continuous salt spray tests conducted at a single

temperature only, such as ASTM B117 and similar international test

standards, and may be used with pH neutral salt solutions (NSS) or

those acidified by the addition of Acetic Acid (ASS) or Cupric Acid

(CASS).

Ascott Premium Salt Spray models (iP) can perform the same basic

salt spray tests, but in addition are equipped with extra features

which enable them to undertake ‘modified’ tests such as those

defined in ASTM G85. Here conventional salt spray is often

combined with one other climate, in a two-part cycle, to

accelerate the test. For example: salt spray and condensation

humidity (SWAAT) or salt spray and drying (PROHESION) or salt

spray and SO2 testing.

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Part 1 - Health & Safety 1.1 Health and Safety Policy

The manufacturer is required to ensure, for reasons of Health and

Safety at Work that, as far as is reasonably practicable, the articles

which we design, produce and supply are as safe as possible and of

minimal risk to health.

We are required to provide information on the safety and handling

precautions to be observed when installing, operating and

maintaining our product. Such advice is contained in this manual.

We should also like to point out, however that you as users have an

important responsibility in the provision and maintenance of safe

working practices and conditions.

Accordingly we draw to your attention the following matters:

i. This apparatus should only be used as intended and within its

design parameters by suitably qualified and trained personnel

who have read and understood the relevant sections of this

manual.

ii This manual should be readily available to such personnel at all

times.

iii In addition to that which is written in the manual, normal

common-sense safety precautions must be taken at all times

to avoid the possibility of accidents.

iv Installation, maintenance and connection to electrical

supplies should only be carried out by suitably trained

personnel.

v. We would recommend that users produce their own risk

assessment for the entire testing process for which this

apparatus will be used.

vi. The normal operation noise levels for the chamber are shown

below and if they exceed these parameters then there is a

problem with the chamber. Please obtain advise from your

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local agent / distributor or Ascott themselves to ascertain

problem. Some accessories may deviate from these levels.

Declared Dual-Number Noise Declaration

Manufacturer Ascott Analytical Equipment Ltd

Type Cyclic Corrosion Test Chambers (CC1000iP)

Declared Dual Number Noise Emission Values according to EN ISO 4871

A-Weighted Emission Sound Pressure Level at the Work Station

Measured value Lpa in decibels 51.59

Uncertainty Kpa in decibels 1.50

A-Weighted Emission Sound Power Level

Measured Value Lwa in Decibels 69.02

Uncertainty Kwa in decibels 1.50

The determination, declaration and verification of air bourne noise emission have been carried out in accordance with EN 14462 as required within clause 5.5.2 (Noise reduction at source at the design stage) of EN12921-1:2005+A1:2010.

Values determined according to the noise test code EN 14462 using the basic standards EN ISO 11201 (Grade 2) and EN ISO 3744.

vii. Training is available if required. Please contact Ascott or your

Agent / Distributor for more details.

viii. No specific PPE is required during standard operation of the

chamber as the chamber is designed to purge the

atmosphere before opening the canopy to the chamber

working area. Some accessories may require PPE to be worn.

All accessories that utilise sub zero temperatures will require

gloves to be worn when handling anything inside the

chamber. Accessory ACC46 – SO2 testing facility must follow

the instructions for the accessory as the atmosphere and bi

products can be extremely hazardous.

ix. Under no circumstances should anyone be inside the

chamber during operation or exposed to the corrosive

atmosphere of the chamber. All leaks must be reported and

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repaired. Chamber must be isolated immediately if any

atmosphere or water leaks are detected.

x. No structural changes or fitting of customers own tools /

accessories without first contacting Ascott or its associates.

xi. In the event of a breakdown consult Ascott or its associates

immediately as further damage to the chamber and / or

personnel may occur.

xii. Ascott chambers will have the following safety labels attached

to the side panel work.

Warning people of potential electric shock.

Warning people of hot water, confined space and sharp edges.

xiii. The control panel also has two labels to identify the Air Pressure

Gauge for the chamber and the regulator for the air

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supply.

Denotes Pressure Guage

Denotes Pressure Regulator

xiv. Inside the control compartment the earthing point of the

chamber is clearly identified with the following symbol

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1.2 Transport and Lifting

i. Lifting of the chamber should only be done with a fork truck and lifted using the designated lifting points at the rear of the chamber. The lifting points are identified with the following logos

– ii. When transporting the chamber ensure it is locked and strapped

into position preferably chocked up off the castors using the chassis frame. No loads are to be put on the top. Drains must be emptied before loading.

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Installation Manual

For Models:

S120/450/1000/2000iP

1

Part 2 – Installation

CAUTION

THE EQUIPMENT SHOULD ONLY BE INSTALLED BY SUITABLY QUALIFIED

PERSONNEL. DAMAGE CAUSED DUE TO INCORRECT INSTALLATION

WILL NOT BE COVERED BY THE WARRANTY.

2.1 Operating Environment

This equipment is designed for internal use only, in an environment

controlled to within the following limits:-

Storage

Ambient Temperature: +5 to +30°C (no icing)

Ambient Humidity: < 85% RH (no condensation)

Operation

Ambient Temperature: +18 to +23°C (no icing)

Ambient Humidity: <50% RH (no condensation)

Note: The minimum operating temperature achievable inside a basic

chamber (without accessories) will depend directly upon the actual

ambient temperature of the environment in which it is located

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2.2 Positioning

Move the Cyclic Corrosion Test Chamber into position on a clear, clean

stable, level floor as shown:

Chamber

The rear castors can be locked

when the chamber has been

positioned.

(Not fitted to 120L chambers)

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2.3 External Services

2.3.1 External Utilities

Note: All hoses and pipes up to 3 metres (10ft) in length, and the power cable are

supplied with the chamber.

Air Saturator Automatic Water

Inlet (De-ionised Water) 12.5 mm (½”)

bore hose Air Saturator Drain (No connection)

Compressed air inlet 12.5 mm (½”)

bore hose

2.3.1.1 Compressed Air Inlet

Note: The compressed air supply must be clean, dry and oil free. It must have a

minimum pressure of 4.0 bar (57 psi) and a maximum pressure of 6.0 bar (87 psi). Between

these pressures, the flow rate should be at least 75 litres per minute (2.6 cubic feet per

minute) equating to a free flow at atmospheric pressure of approximately 102 standard

litres per minute (3.6 standard cubic feet per minute).

(i). Connect the 12.5 mm (1/2”)bore air hose supplied, between the

air inlet at the rear of the chamber and the compressed air

supply. (See above).

2.3.1.2 De-ionised Water Supply

Note: The de-ionised water supply must have a minimum pressure of 0.5 bar (7PSI) and a

maximum of 5 bar (72PSI).

Connect the 12.5 mm (1/2”) bore water hose supplied, between the two water inlet hose connections at the rear

of the chamber and the de-ionised water supply. (See above).

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2.3.1.3 Electrical Supply

We recommend this equipment is connected to an electrical supply

protected by a residual current device (earth leakage circuit breaker).

Before connecting this equipment to an electrical supply, check the

information given on the equipment rating plate and ensure that:

Your supply is Single phase A.C. (Alternating Current) of the stated

frequency with Neutral (If Fitted) nominally at Earth potential.

Your supply voltage is within the stated range.

The current rating is within the capacity of your supply outlet.

Your plug or outlet circuit is suitably fused.

Isolates the chamber from the

electricity supply.

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WARNING: THIS APPARATUS MUST BE EARTHED

A rotary electrical isolator switch is mounted in a prominent position on the

chamber. This isolates the chamber from the incoming electrical supply (live

and neutral) when the switch is rotated to the '0' position, and can be

padlocked in this position if required. The electrical supply is connected when

this switch is rotated to the '1' position.

Resetable Thermal Over current trip

switches

2.3.1.4 Salt Solution Reservoir

(i). Position the Salt Solution Reservoir to the left of the chamber.

Salt Solution Reservoir – The side wall

has a hole to allow the salt solution

hose to pass through.

Salt solution inlet hose

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(ii). Feed the end of the 6 mm salt solution hose that is fitted with a

filter, into the Salt Solution Reservoir ensuring that the filter unit lies

at the bottom of the reservoir.

2.3.1.5 Exhaust and Drains

2.3.1.5.1 Condensate Drain

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Drain – 22 mm (7/8”) diameter

pipe

(i). Connect the 22 mm (7/8”) diameter push-fit pipe to the rear of

the chamber.

(ii). Connect the other end to the service drain.

2.3.1.5.2 Air Saturator Drain

Note: If chambers are left unused for any length of time it is recommended that the

air saturator is drained to prevent the build up of algae which could cause system

blockages or of bacteria which might present a potential health risk.

Air Saturator Drain

Do not connect anything to the Air

Saturator Drain; it is provided for

maintenance purposes only.

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To drain when required:

Reduce the air pressure on the

control panel to zero. Then use a flat

blade screwdriver to open the drain

tap.

2.3.1.5.3 Exhaust Vent to Atmosphere

Exhaust –50mm (2”) diameter

pipe for all S chambers.

(i). Connect the exhaust pipe provided to the exhaust outlet to the

rear of the chamber.

(ii). If the length of the vent pipe route is greater than 5 metres, a

larger diameter pipe may be required.

(iii). Route the other end to outside atmosphere, maintaining a

straight run-up or run-down to avoid sags where condensate may

collect and cause backpressure.

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2.3.1.5.4 Manual Base Drain

Drains the chamber completely.

With the tap handle in the vertical

(closed) position, salt fog

condensate will accumulate in the

chamber base to a predetermined

level, before draining to waste. This

assists in maintaining a high humidity

during testing, and is the correct

position for most continuous salt

spray tests.

With the tap handle in the horizontal

(open) position, salt fog condensate

will drain away. This drains the

chamber interior for cleaning.

2.4 Atomiser Set up

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On 450L/1000L & 2000L chambers, the atomiser is mounted in a PVC

holder located on the rear wall of the chamber. It is locked into

position using plastic thumbscrews. Position and lock the atomiser so

that when atomising, the spray impacts in the centre of the inside of the

canopy viewing window when the canopy is closed. This position can

be adjusted to achieve even fallout results during salt spray testing.

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On 120L chambers, the atomiser is mounted in a PVC holder located on

a sideways moveable mount. Position the atomiser so that when

atomising, the spray impacts in the sealing gasket between the canopy

and the GRP chamber, when the canopy is closed. This position can be

adjusted left to right to achieve even fallout results during salt spray

testing.

Note: Please see the care and maintenance section for details of how to remove

and maintain the atomiser.

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Operation Manual

For Models:

S120/450/1000/2000iP

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Part 3 – Operation

3.1 Help

3.1.1 Human Machine Interface (HMI) Screen

The chamber control system utilises a Human Machine Interface (HMI)

screen mounted in the chamber control panel. This operates in

conjunction with a Programmable Logic Controller (PLC) mounted within

the chamber. The HMI screen is touch sensitive and uses ‘virtual’ push

buttons for the selection of various functions.

Run Indicator

Illuminates green while the HMI

is powered and operating

correctly.

(Orange/red illumination

indicates a problem).

Display

Full colour VGA LCD screen

with backlight.

Screen Saver Mode

If the HMI is not touched for 10

minutes it will enter screen saver

mode to preserve the life of the

HMI, the chamber will continue

to function as normal. To

illuminate the HMI, simply touch

the roaming screen switch.

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The HMI screen uses a menu driven format, where functions are

selected from a variety of ‘pop-up’ pages. Most ‘pop-up’ pages

usually have an (escape) button, located in the top right hand

corner.

Touching will return the

HMI display to the previous

page.

3.1.2 Contact Details

To access the chamber serial number, PLC/ HMI software revision

numbers and for Ascott contact details; touch the button or

touch the logo.

This page displays three pieces

of information required by an

Ascott engineer if contact with

Ascott is to be made. They

are:

Chamber serial number, PLC

software revision number and

HMI software revision number.

Touch the button to

return to the Main Menu page

shown above.

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3.2 Set up

3.2.1 Initial Power Up – Ascott Main Menu

When the chamber is first switched on, after a few moments, the

following page will be displayed and after 20seconds an alarm will

sound.

Ascott Main Menu Page:

When operating the chamber,

repeatedly touch the

button to return to the Ascott

Main Menu page.

On start up alarm will start after

20 secs. Press the flashing

Alarm warning.

Then press the mute button to

silence.

Then hit the Esc button to

return to Main Menu.

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3.2.2 User Access

The chamber has two operating modes, ‘Operator’ and ‘Supervisor’.

‘Supervisor’ mode allows access to an additional chamber settings

menu and is password protected

At the Ascott Main Menu Page, touching displays the following

page:

To enter the settings menu

available in ‘Supervisor’

mode a 4 digit code will

need to be entered. This is

default set to 1234 but can

be changed within the

Settings Menu.

Entering the 4 digit code displays the following page:

Pressing , all of the

test chamber settable

parameters can be viewed

and adjusted.

See ‘Settings-Supervisor

Mode’ below for details of

these parameters.

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3.2.3 Settings – Supervisor Mode

The button will only be visible if the correct access code has

been input. See Access, above.

Note: In each Settings page touch to save the setting and exit

back to the supervisor ‘Settings Menu’.

Note: The settings that appear within this menu depend upon the optional

accessories (if any) ordered with the chamber.

At the Ascott ‘Main Menu’ Page, touching brings up the

following pages:

Settings Menu, Page 1

Touch to display page 2.


Touch to display page 1 settings.

Touch to display page 3.

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These are global settings that apply to all programs and therefore need

only be set once.

Detailed descriptions for each setting follow.

3.2.3.1 Set Password

Touching brings up the following page:

Touch the button to

display a numeric keypad which

will enable a new password to be

entered and saved.

The current password is displayed in the left-hand window (factory set to

1234).

3.2.3.2 Set Holdback



Touch to display page 2 settings.

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H

o

l

d

b

a

c

k

Holdback creates a ‘tolerance band’ around the set value for

temperature. With holdback on, the program step timer will not start until

the temperature inside the chamber is within the tolerance band. A

HOLDBACK ON message will appear within the main run page and the

chamber will continue to function normally in this holdback state.

This function can be useful in providing a ‘guaranteed soak time’ at a

particular set temperature. However, if an unrealistically small tolerance

band is set, especially when the chamber has been programmed for

automatic temperature cycling, then the programmed step times might

easily be exceeded due to the effect of holdback.

3.2.3.3 Set Air Saturator Temp

This is the target set temperature for the air saturator.

Touching the button brings up the following page:

Touch the button to

activate/ deactivate the

holdback facility. To adjust the

holdback tolerance setting, touch

current value displayed on the

button to reveal a

numeric keypad, the new setting

can then be entered and saved..

To adjust the set value of the air

saturator, touch the current value

displayed in the button to

display a numeric keypad, the

new setting can then be entered

and saved. Refer to the test

standard being run for the air

saturator set value.

The maximum permitted set value

is 63C.

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3.2.3.4 Set Pump speeds

Note: If a chamber is fitted with a Multi-Solution Salt Spray Facility (Optional accessory

ref.: ACC86) or Water Fog Humidity (optional accessory ref; ACC32) then the

instructions that follow for setting the Pump Speed(s) may change. Please refer to the

supplementary instructions, which will have been provided in the optional accessories

section at the back of this manual

This sets the speed of rotation of the peristaltic pump(s) in the usual salt

spray (vertically up) mode of operation. It is adjustable from 0-99%.

Increasing pump speed will increase the salt spray fall-out rates

collected inside the chamber and vice versa.

Depending on the size of test chamber, touching the

button will bring up one of the two following pages:

If a single pump is fitted:

To adjust the pump speed, press the

current value displayed in the

button, this will display a numeric

keypad where the new pump speed

can be entered and saved.

If two pumps are fitted (2000L) the

following page will be displayed.

Adjusting the pump speeds is the

same process as described

above.

Each pump speed can be

individually set to allow fallout to

be independently controlled from

left to right.

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3.2.3.5 Set Purge Time

Touching the button will bring up the following page:

‘Normal’ purge time is the number

of seconds of air purging of the

chamber interior that will take

place automatically, if salt spray

or SO2 testing has occurred,

before the chamber canopy can

be opened.

Purge before function ‘3/7’ is the

number of seconds of air purging

of the chamber interior that will

take place automatically at the

beginning of function 3 (Wetting

)and function 7, Cooling

(optional accessory).

Both may be adjusted by touching

the value to show a numeric touch

pad, and then a new value can

be entered.

Touch to save the settings

and exit back to the supervisor

‘Settings Menu’.

Notes:

‘Normal’ purge time is factory set to 450 seconds. This can not be reduced but may be

increased if required.

Purge before function ‘3/7’ is factory set to 0 seconds. Users may decide that if a Wetting or

Cooling phase is programmed to follow a salt spray or SO2 phase, it may be desirable to

incorporate a period of air purging to minimise the salt spray/SO2 remaining in the chamber

atmosphere, before a Wetting or Cooling phase begins.

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3.2.3.6 Disable Alarm Sounder

Touching the button will bring up the following

page:

If a chamber alarm condition

arises, a visual alarm indicator on

the control panel illuminates and

an audible alarm sounds.

Touching the ‘SOUNDER ENABLED’

button will enable/disable the

alarm sounder. The sounder is

factory set to on.

Touch to save the settings


‘Settings Menu’.

Note: If the alarm sounder is switched off, the audible alarm will still sound when the

canopy is opened or closed. For safety reasons this cannot be disabled.

3.2.3.7 Calibration


page:

23

Note: Warning message and

touch to access Calibration

pages.

By reference to independent, calibrated temperature/humidity

measuring sensors, users can cross check and adjust chamber values

for the following parameters. One parameter is displayed on each

page and these can be scrolled to by touching the buttons:

Chamber temperature can be

offset by adding or subtracting °C

to the displayed value (result) To

do this, touch the or

‘press here’ buttons to

display a numeric key pad and

enter the required offset value.

Air saturator temperature can be

offset by adding or subtracting °C

to the displayed value (result). To

do this, touch the or

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Chamber humidity can be offset

by adding or subtracting %RH to

the displayed value (result). To do

this, touch the or




Liquid Immersion (Fn6)

temperature can be offset by

adding or subtracting °C to the

displayed value (result). To do this,

touch the or

‘press here’ buttons to display a

numeric key pad and enter the

required offset value.

(Note; the maximum offset is 9.9.)

3.2.3.8 Set Ramping

Touching the button will bring up the following page:

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Touching the button

will enable/disable the program

ramping facility within ‘main

programs’.

With ramping set to on, when a main program is run, programmed

changes in temperature and/or humidity set values will occur linearly over

the duration of the programmed step time (for all step times greater than

1 minute) i.e.; the temperature/humidity will ramp to the new set value(s).

With ramping set to off, when a main program is run, programmed

changes in temperature and/or humidity set values will occur as quickly

as the chamber is capable of achieving, over the duration of the

programmed step time.

Note: If any program step changes are required to occur linearly over time, then

ramping must be set to on. If all program step changes are required to occur as quickly

as possible, then ramping should be set to off as this will simplify programming and

maximise the number of function steps available per program.

3.2.3.9 Power Fail Recovery

Touching the button will bring up either of the

following pages, depending on how the chamber has been set up:

With power fail recovery mode set

to ; following

an interruption to the chamber

electrical supply, the chamber will

automatically continue any

running program from exactly the

same point in the program that it

was at when the electrical supply

was first interrupted. The total

hours counter will not have reset,

and will therefore accurately

26

reflect the total run time.

If power fail recovery mode is set

to ; following an

interruption to the chamber

electrical supply, the chamber will

automatically pause any running

program. The operator then has

the choice of continuing or

stopping the test.

Touching either of these buttons toggles the power fail recover mode

between and mode. Set as required.

3.2.3.10 Set Test Type

WARNING !

It is important that the following procedure is complied with to prevent

damage to the humidity sensor.

The chamber is fitted with an

automatic ‘air curtain’ which will

protect the humidity sensor with a jet

of compressed air during salt spray

testing with acidic solutions.

The humidity sensor does not

function when this is operational.

Touching brings up a menu with the following 4

choices;

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Select the most appropriate

choice for the type of testing to be

undertaken. All but ‘Neutral Salt

Spray (NSS)’ testing will activate

the air curtain.

The humidity display icon changes

to show when this is active.

3.2.3.11 Air Saturator Fill Method

Note: This setting only applies to chambers fitted with the Manual Filling Air Saturator

Option (optional accessory ref.: ACC66). Please refer to the supplementary instructions,

which will have been provided in the optional accessories section at the back of this

manual.


page.

If the chamber is not connected

to a permanent supply of mains

pressure, de-ionised water and

the manual fill optional accessory

has been fitted, set to ‘manual’.

This will allow manual filling of the

air saturator.

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3.2.3.12 Set Background Colour


page.

Adjust the background colour of

the HMI to your preference:

Press the buttons to scroll

through the palette of colours in

sequence. A reference number is

displayed for each colour.

Alternatively, match the screen

background to one of the more

commonly used canopy colours

by touching one of the coloured

buttons.

Touching will save the settings


settings menu.

3.3 Programming

3.3.1 Program Menu

Note; at the end of this programming section, an example program has been included,

with step by step instructions on how to create it.

Touching brings up the following Program Menu page:

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Touching allows the user

to edit an existing program, or

create a new program.

Touching allows the user to

view all the steps of an existing

program and their operating

sequence.

Touching allows the user

to delete an existing program.

3.3.2 Edit Program

3.3.2.1 Editing Program This allows the operator to edit a program in full. Here the operator can

edit all of the programmable parameters and number of cycle repeat

Touching opens up the following page:

From this page the user can

choose to edit a main, sub

or single line program.

The differences between

the program types are

detailed below.

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i) Programs Main

A main program can comprise of a number of step functions or sub

programs, linked together in a sequence to form a test cycle. Each step

can have independent settings for temperature, time and where

applicable, relative humidity.

Up to 10 main programs, each comprising of up to 30 separate steps can

be stored.


Scroll through the list of programs

using the buttons.

Highlight the program to be

edited by touching the

corresponding button. i.e.

. This will cause

the program number to flash

confirming that it has been

selected.

iii) Programs Single

A single program is used for operating a single function, at a single

steady state temperature, for a programmed period of time.

Up to 5 single programs, each comprising of 1 step can be stored.

Touching opens the following page:

31


edited by touching the


. This will cause



selected.

3.3.2.2 Open Program

Once a Main or Single program type has been selected, touching

in any program edit page opens the following page:

This is the ‘program edit’ page,

where from here the complete

program can be written, the

following steps will guide an

operator through the process.

The actual buttons displayed will

depend upon the function

selected.


32

This page allows the program title

to be entered or amended.

Using letters and numbers the user

can name programs using up to

16 characters, including spaces.

The button must be

touched to confirm the new title.

Touching the button opens the following page:

The new title will be displayed in

the and

windows.

To create a program, follow the steps detailed below.

3.3.2.3 Step Number

A step is an individual programmable segment of a program. A main

program can be made of up to 30 steps. A sub program can be made

of up to 7 steps. A single program is made from a single step.

All programs start at step number 1.

Scroll through the program steps

using the buttons located

beneath the current step number

until the required step number is

displayed.

33

3.3.2.4 Mode

The function required to be run in each program step is displayed inside the

button.

Touching the button within the button brings up the following

page:

If editing or

these are the step function

choices.

Note: The page displayed in this table

represents a chamber with various

optional accessories fitted. The actual

buttons displayed will depend upon

which options have been fitted to the

chamber.

The above functions are described in detail below.

Once selected, the screen will automatically return the ‘program edit’

page.

34

3.3.2.5 Program Functions

Note; A selected function will be active during an entire program step.

i) Function Off.

If selected, no function will be active during this step of the program;

however a time can still be entered for the step. This can be used to

operate as a ‘delayed’ start to a test commencing.

ii) Conventional Salt Spray.

Note: If this chamber has been fitted with a Multi-Solution Salt Spray Facility (Optional

accessory ref.: ACC86) then these instructions may change. Please refer to the

supplementary instructions, which will have been provided at the back of this manual,

if this facility has been fitted.

During this mode of operation salt fog is sprayed directly up towards the

canopy window and dispersed so that it ‘falls-out’ uniformly inside the

chamber. The chamber relative humidity is not controlled during this

mode of operation.

Conventional Salt Spray has a maximum operating temperature of

+50C.

iii) Temperature Controlled Air Flushing

During this mode of operation fresh air drawn from outside the chamber

is continuously blown into the chamber via an air heater. Relative

humidity is uncontrolled and will depend largely upon the ambient

humidity of the room in which the chamber is located.

The chamber air temperature is adjustable from ambient up to +50C.

iv) Condensation Humidity / Wetting

At the start of this function, the base drain automatically opens to allow

any liquid accumulated to drain away. The chamber then fills the small

tank located in the bottom of the chamber with fresh water. Heat is

generated using the immersion heater positioned in the small tank in

35

the bottom of the chamber. Set temperatures of 10~15C above

ambient will ensure that high relative humidity levels of 95~100%RH are

achieved during this mode.

The chamber air temperature is adjustable from ambient up to +50C.

3.3.2.6 Step Temperature Set Value

This is the target set value for temperature to be achieved at the end of

the step time, for this particular step.

Touching the buttons within the button increases/

decreases the set temperature by 0.1C each time a button is touched.

Alternatively, for large value changes, touching brings up a

numeric key pad where larger values can be entered and saved.

3.3.2.7 Step Time Set Value

Step time is the duration of a program step. It can be set from 1 minute,

(Rapid Step) to 99 hours 59 minutes (Ramp/Dwell).

Touching the buttons of the button increases/ decreases the

step time by 1 minute each time a button is touched. Alternatively, for

large value changes, touching the button brings up a numeric

key pad where larger values can be entered and saved.

Note; A rapid step is a step that will take the actual chamber values of

temperature and humidity to the set values programmed within each

step as quickly as the chamber can physically manage. To program a

rapid step the time within that step must be set to 1 minute. This type of

step should be used when rapid conditional changes within the test

space are required.

36

3.3.2.9 Saving/Cancelling an Edited Program

Once a program has been edited, pressing brings up the following

page:

On this page, the number of

required program repeats (see

below) can be set, and the

program can be saved or

cancelled.

Touching the button will display the following page;

Touching will cancel the

‘SAVE AS’.

Touching will return to the ‘SAVE AS’ page.

3.3.2.10 Program Repeats

This is used to set the number of times a program is repeated. A setting of

0 means the program will run once only with no repeats. A setting of 99

means the program will repeat continuously. Any other setting means the

program will be repeated the set number of times.

For main programs, this is used to select the number of times an entire

program is to be repeated. For sub programs, this will determine the

number of times the sub program is repeated within a main program. For

single programs this can be used to extend the maximum duration of the

program, which would otherwise be limited to the 99 hours & 59 minutes

maximum step time. For example, if a single program duration of 250

37

hours is required; this could be achieved by setting a step time of 25 hours

and setting the number of program repeats to 9. ((1 x 25) + (9 x 25) = 250).

Touching brings up a numeric key pad where values can be

entered.

3.3.2.11 Save

Touching saves an edited program under its current program

number.

3.3.2.12 Save as

Touching gives the user the opportunity to save a previously

saved program under another program number, by bringing up the

following page:

The current program number will be

flashing. Touch the new program

number as required, which will then

start to flash confirming its selection;

touch to save the

program under this program

number.

3.3.3 Program View

This allows the operator to view a written program in full without risk of

making any changes. Here the operator can view all of the

programmable parameters and number of cycle repeats.

38

Touching in the Program Menu page brings up the following

page.


choose whether to view a main,

sub or single line program.

The method for viewing a program is similar regardless of whether it is a

Main, Sub or Single program being deleted. An example of

how to view a Sub program follows.


using the buttons.


viewed by touching the


. This will cause

the program number to flash.

Touch to display the page

shown below.

39

The selected program number

and title will be highlighted at the

top of the page.

This page shows the program

steps: 1 step for single programs,

up to 7 steps for sub programs,

and up to 30 steps for main

programs. For main and sub

programs, the view is spread over

more than 1 page, which can be

scrolled through by touching the

buttons.

3.3.4 Program Delete

This allows the operator to delete a written program in full.

Touching opens up the following page:


choose whether to delete

a main, sub or single line

program.

The method for deleting a program is similar regardless of whether it is a

Main, Sub or Single program being deleted. An example of

how to delete a Main program follows.


40

From this page redundant

programs can be deleted to make

space for creating new programs.


using the buttons.


deleted by touching the

corresponding button, ie;

.

This will cause the program

number to flash.

Touch to display the page

shown below;

The selected program number and

title will be highlighted at the top of

the page.

Touch to delete the highlighted program.

Touch to cancel program delete and return to the Program Menu page.

41

3.4 Chamber Operation 3.4.1 Running a Program 3.4.1.1 Main Menu

Touch the button to return to the ‘Main Menu’ page

‘Main Menu’ Page.

Touching opens the ‘Run’ page:

This is the page from which

programs are loaded, started,

monitored and paused/stopped.

The page has a ‘Message bar’,

above the row of buttons.

The page has an ‘Alarm Status

button’ below the row of buttons.

The page display mimics the programming page and is laid out in

a similar way. The actual page display may differ slightly from the page

shown above, depending upon the chamber model, its optional

accessories, and the type of program loaded.

Note: ‘XXXXXXXXX’ as shown above in the program number and title boxes

will be replaced by the number and name of the program when loaded.

As usual, touching the button will escape to the previous page.

42

3.4.1.2 Program Load


Here user first chooses the type of

program they wish to load; the

actual program can be selected

from the list previously created

during program edit.

If a program is running, a warning

message is displayed advising the

user that a program cannot be

loaded while a program is running.

Touch to clear message.

Scroll through the available

programs using the

buttons.


loaded by touching the

corresponding button. I.E.

. This will cause



selected.

43

Once a program has been selected press the page will revert

to the ‘Run’ page.

If the loaded program contains a

salt spray or SO2 step, the Message

Bar will indicate;

This allows limited access to the

Supervisor settings page for

determining the test type. Select

the appropriate type from the

choices given. See the instruction

manual section which covers

Supervisor settings for further

information.

3.4.1.3 Program Run

Touching will start the loaded program running, either from the

very beginning, or from the beginning of a program step selected via

the button (see below). Touching the button also zero’s

the Program Run Time counter.

Note: Programs should be run only with the canopy closed. However it is possible to

run a loaded program for up to 5 minutes with the canopy open, for test purposes.

3.4.1.4 Program Stop

Touching will stop the loaded program. Confirmation is required

because once a program is stopped it can only be restarted from the

beginning of the program. The program run time counter will also be

zeroed.

44

3.4.1.5 Program Pause

Touching will pause a running program. During program pause,

the button will flash continuously. Touching or once

more will allow the program to run again from the same point in the

program from when the pause button was first touched.

Note: During program pause, the step time counter and the program total run

time counter are also paused.

3.4.1.6 Program Fast Forward

This button will only appear if a program is stopped and not running.

Touching enables the user to fast forward to the program step of

their choice and start the program from there, rather than the very

beginning, if required.

3.4.1.7 Run Settings

Touching the button brings up the ‘Run Settings’ page.

This is the page from which some

chamber settings can be

checked or altered.

The page has a ‘Message bar’,

above the row of buttons.

The page has an ‘Alarm Status

button’ below the row of buttons.

Press or to return to the ‘Run’ page.

45

3.4.1.8 Trending

This facility allows the user to monitor the chamber temperature and

relative humidity against time, graphically.


Touch to

view the temperature profile.

Touch to

view the relative humidity profile.

Touch to scroll the display

back/forward in 30 minute steps.

Touch to go to the

previous/next page of display

data.

This is a graphical representation of the set temperature/humidity

(dashed line) and actual temperature/humidity (solid line) against time.

Each page displays data logged over a 300 minute period of time.

The page displayed on first entering the Trending facility relates to the

current time. Previous pages of data can be viewed covering a total

time of 72 hours. Data over 72 hours old is continually discarded as new

data is logged.

Press to return to the ‘Run Settings’ page.

46

3.4.1.9 Total Chamber Hours Run

Touching the button brings up the following display.

This will display the total number of

hours the chamber has run and

can not be reset.

3.4.2 View Running Program

Touching the screen in this area allows the user to view the

program that is currently loaded.

Scroll through the program using

the buttons.

Touch to return to the ‘Run’ page.

47

3.4.2.1 Step Number

This shows the step number for the program step about to be run - if the

program has yet to be started, or the current step - if the program is

running.

3.4.2.2 Step Function

This shows the step function for the program step about to be run - if the

program has yet to be started, or the current step - if the program is

running.

3.4.2.3 Step Temperature

This shows the temperature set value (SV) and the temperature actual

value (PV) for the program step about to be run - if the program has yet

to be started, or the current step - if the program is running.

Touch to reveal the chamber PID control terms and

heat output.

3.4.2.4 Step Time

This shows the step time set (SV) and the step time elapsed (PV) for the

program step about to be run - if the program has yet to be started, or

the current step - if the program is running.

3.4.2.5 Step Humidity

48

This shows the humidity set value (SV) and the humidity actual value

(PV) for the program step about to be run - if the program has yet to be

started, or the current step - if the program is running.

Note: This will only appear if the step function is a humidity step.

Touch to reveal the

chamber PID control terms and

humidity output.

3.4.2.6 Program Run Time

This shows the total elapsed program run time in hours. Touching this

display will reveal any part hours elapsed as minutes, if required. Starting

a program will zero’s this timer.

3.4.3 Canopy

Touching the button in any page opens one of the following

pages:

If the canopy is closed and a

program is running, a warning

message is displayed advising the

user that the canopy can not be

opened while a program is

running. Touch to clear

message.

49

If the canopy is closed with no

program running, touch to

open. If no program with Salt spray

or SO2 has been run an alarm will

sound for a few seconds and then

the canopy will open

automatically.

Pressing or will close this

page.

If the canopy is closed with no

program running but a program

has been run with salt spray or

SO2 then the chamber will

automatically purge itself for a

minimum of 450 seconds

Once the purge is complete touch

to open; an alarm will sound

for a few seconds and then the

canopy will open automatically.


page.

50

If the canopy is open touch and

hold to close. An alarm will

sound for a few seconds and then

the canopy will close. The

button must be held until the

canopy has fully closed.


page.

3.4.4 Air Saturator Mode


This page allows the user to select

if they wish the chamber air

saturator to be active or inactive.

Touch the required button to

select.

Press to return to the ‘Run Settings’ page.

In the mode of operation, compressed air for the salt spray

atomiser is bubbled through the chamber air saturator. This is the

factory set condition, since this is a requirement of most salt spray test

standards.

Note: the chamber will automatically revert to this mode whenever the

chamber power is switched off and back on again.

51

In air mode the air saturator is bypassed. This is the correct mode

for testing to ASTM G85, annex A5.

The run settings page button will display when the air saturator is

active and will display when it is inactive.

3.4.5 Message Bar

A message bar is provided where shown, this is used to display a range

of messages to the user, including alarms. In the context of running a

program, the message bar will display the message ‘Program

Completed’ when the running program and any repeats have been

completed.

For certain program types the

Message bar will also flash:

See the ‘Set Test Type’ section of

the manual for details.

3.4.6 Controls

3.4.6.1 Emergency Stop

52

Pressing the chamber emergency

stop button during canopy

opening or closing will ‘freeze’ the

canopy in its current position.

An audible alarm sounds. When the emergency stop button is returned

to its normal position, the HMI screen will return to the canopy

Open/Close screen.

3.4.6.2 Air Pressure Gauge & Regulator

Air Pressure Gauge and Regulator

These indicate and control the pressure of the compressed air supply to

the atomiser(s).

To adjust the air pressure:

(i). Pull out the regulator knob to unlock.

(ii). Rotate anticlockwise to decrease the pressure and clockwise to

increase it.

(iii). Push in the regulator knob to lock.

53

3.4.6.3 Flow Meter(s) & Peristaltic Pump(s)

Flow meters and Peristaltic

pumps

(2000L- pictured)

450L and 1000L chambers are fitted with one flow meter and one

peristaltic pump. 2000L chambers are fitted with two flow meters, and

two peristaltic pumps, one of each for each atomiser. The flow meter(s)

monitor the flow rate of salt solution from the reservoir to the atomiser(s).

The peristaltic pump(s) draw salt solution from the reservoir and pass it

to the atomiser(s).

3.4.7 Setting Up Procedure

3.4.7.1 Determine the test parameters

(i). Cyclic Corrosion Test to be performed.

(ii). Composition of the salt solution.

(iii). Atomiser air, dry/moist, heated/unheated.

(iv). Salt fog fall out rate.

(v). Test duration/number of cycles.

54

3.4.7.2 Set up chamber

(i). Ensure mains isolator is ON.

(ii). Load the test samples into the chamber.

(iii). Prepare the salt solution and transfer it to the salt solution

reservoir.

(iv). Ensure that the salt solution reservoir is connected to the

chamber.

(v). Ensure that the drain and exhaust are connected and not

blocked.

(vi). Load required test program.

(vii). Run the loaded test program.

(viii). Adjust the pressure regulator and/or the salt solution flow rate to

give the required salt fog fall-out rate.

3.4.7.3 Set the Salt Fog Fallout Rate

(Usually carried out in advance of testing of components)

The method for measuring the Salt Fog Fallout Rate is specified as being

a 100 mm-diameter funnel in conjunction with a measuring cylinder

graduated in millilitres. This procedure is used to collect salt fog fallout

at various points across the chamber workspace (no closer than 100

mm from the chamber walls or atomiser) for set periods of time.

From these measurements the average fog fallout rate and the spread

of the fog throughout the chamber can be determined.

Generally, the spread of the fog within the chamber is controlled by the

air pressure, and the density of the fog is controlled by the salt solution

flow rate.

With the atomiser positioned centrally in the chamber, increasing the air

pressure will tend to increase the salt fog fallout at the extremes of the

55

chamber, whilst decreasing the air pressure will tend to increase the

fallout in the centre of the chamber.

Increasing the salt solution flow rate will increase the salt fog fallout at

any point in the chamber, whilst decreasing the flow rate will reduce

the fallout at any point.

Only very small adjustments to the air pressure and flow rate should be

made at any one time, before rechecking the results.

(i). Set the air pressure to 1.4 bar (20 psi).

(ii). Set the initial flow rate so that the peak flow is approximately 10

to 15 ml/min. The ball in the flow meter will fluctuate up and

down with every half revolution of the peristaltic pump.

(iii). Adjust the air pressure to obtain an even spread of fog within the

chamber, regardless of the actual amount of fallout collected.

(iv). Adjust the flow rate to bring the fallout within the limits specified in

the test standard.

(v). Recheck the spread of the fog and repeat operations iii and iv

above until satisfactory.

3.4.8 Shut down procedure:

(i). Stop any running programs.

(ii). Switch electrical isolator to OFF.

3.5 Alarms

3.5.1 Alarm Status


56

Touch to silence audible

warning

Touch to reset any

alarms that are no longer active

Touch to review alarms

history (see below).

This page will list any active alarms. Note that active alarms will sound an

audible warning unless this has been disabled (within supervisor settings).

A list of all possible alarm conditions and their meaning is given in the

care and maintenance section of this instruction manual.


This page lists all of the

alarm conditions that have

occurred, together with

their frequency of

occurrence.

Press to return to the previous page.

57

Care &

Maintenance

Manual

for Models:

S120/450/1000/2000iP

58

Part 4 – Care And

Maintenance.

4.1 Routine Maintenance

Routine maintenance is recommended to keep the chamber in good

working order. The following maintenance is recommended for a

chamber that is in regular use.

4.1.1 Daily Checks

Record chamber variable parameters on the Daily Check Sheet. A

sample Daily Check Sheet is provided at the end of this manual.

Ensure drain is clear.

Ensure exhaust is clear.

4.1.2 After Use

Clean the chamber interior and canopy by washing with warm water

and mild detergent.

If the chamber is not going to be used for a period of one week or

longer, refer to section 9.1 for recommended storage instructions.

4.1.3 Weekly Maintenance

Atomiser ‘salt in’

Luer fitting

assembly

Atomiser Body & filter

spacer Atomiser Nozzle

Atomiser Cap

Salt Solution Inlet

Hose

Salt solution Filter

Housing (filter fitted) Plastic spacer

Compressed Air Inlet

Hose & Atomiser ‘air in’

Luer fitting assembly

59

1) Check that the chamber service connections are secure and are not

leaking.

2) Switch off the power supply to the chamber.

3) Withdraw the atomiser and filter assembly from its support, taking care

not to damage the two hose connections.

4) Check the salt solution filter material for discoloration.

5) Detach the compressed air inlet hose (BLACK) by rotating the collar of

the ‘air in’ fitting assembly anti clockwise.(See 9.4)

6) Unscrew the atomiser body and cap as a complete assembly, from

the salt solution filter housing. If the atomiser and cap are dirty or have

been giving poor fallout results, clean the atomiser.(See 9.4)

7) Withdraw the salt solution filter material from the salt solution filter

housing using tweezers.

8) Wash the filter material in warm water and mild detergent.

9) If the filter material is badly contaminated or damaged, discard it and

replace it with new filter material.

10) Reassemble the salt solution filter.

(1)

i. Roll the filter material into a

cylindrical shape and insert into

the filter housing (1&2).

ii. Screw the atomiser body, nozzle

and cap onto the filter housing

ensuring Re-attach the

compressed air inlet hose (3).

iii. Refit the atomiser and filter (2)

60

(3)

assembly onto its mount.

iv. Switch on the power supply to

the chamber.

4.1.4 Three–Monthly Maintenance

Change the silicone rubber tube of the peristaltic pump every three

months or earlier if it splits or becomes deformed with usage.

Replace the tube as follows:

(1)

i. Switch off the chamber.

ii. Release the two clamps that hold the

silicone rubber tube in the pump body

(1).

iii. Pull gently on end of silicone rubber tube,

whilst turning the pump roller clockwise

by hand, to withdraw the tube from the

pump (2).

iv. Unscrew the cap of the plastic

compression fitting on both ends of the

silicone tube (3).

v. Pull the two silicone tube ends out of the

compression fittings and retain the olive

and cap for re-use.

vi. Cut a length of new silicone rubber

tubing to exactly the same length as the

original tubing and fit the compression

fitting cap and olive to each end.

vii. Reconnect one end of the new tube to

(2)

(3)

61

(4)

the left compression fitting.

viii. Place the tube into the left clamp (4)

ix. Whilst turning the pump roller clockwise

by hand, feed the pipe under the pump

roller mechanism until the whole length

has been drawn correctly into the pump.

Ensure that the tube is not twisted or

stretched, and lies naturally in the pump.

x. Clamp the other end of the new tube

into the right clamp (5).

xi. Reconnect the remaining end of the new

tube to the right compression fitting (6).

xii. Restart pump, and release right clamp for

a few minutes to allow the silicone rubber

tubing to find its natural position.

(5)

(6)

62

4.2 Unscheduled Maintenance

4.2.1 Storage & Contamination

If the chamber is to stand unused for a period of more than one week,

or if contamination by algae growth is detected in the salt solution

reservoir, the following procedure is recommended:

i. Switch off the chamber.

ii. Drain the air saturator (refer to section 3.7).

iii. Discard any salt solution remaining in the reservoir.

iv. Clean the reservoir thoroughly.

v. Partly fill the reservoir with a biocidal sterilising agent solution and

replace the salt filter housing in the reservoir.

vi. Switch on the chamber and run it in the Salt Spray mode of

operation for approximately five minutes, with the canopy

closed. This will flush all the salt solution hoses and fittings with the

sterilising agent.

vii. Switch off the chamber and leave to stand until required for use.

viii. Discard the sterilising agent and clean the tank thoroughly.

ix. Refill the reservoir with salt water and run for approximately five

minutes to flush any remaining sterilising agent.

4.2.2 Deionised Water Inlet Filter

i. Detach deionised water supply hose from the bulkhead fitting at

the rear of the chamber.

i. Withdraw the wire mesh filter from inside the bulkhead fitting.

ii. Scrub the filter clean with a brush under running water, or replace

the filter.

iii. Re-insert the filter into the bulkhead fitting.

iv. Reconnect the deionised water supply.

63

4.2.3 Clean or Unblock Salt Spray Atomiser

Atomiser ‘salt in’ Luer

fitting assembly

Atomiser Body & filter

spacer

Atomiser Nozzle

Atomiser Cap

Salt Solution Inlet

Hose

Salt solution Filter

Housing (filter fitted) Plastic spacer

Compressed Air Inlet Hose &

Atomiser ‘air in’ Luer fitting

assembly

(1)

(2)

i. Open the chamber canopy

ii. Switch off the power supply to the

chamber.

iii. Withdraw the atomiser and filter

assembly from its support, taking

care not to damage the two hoses.

iv. Detach the compressed air inlet

Hose (1).

v. Unscrew the atomiser cap (2).

vi. Wash the atomiser cap in warm

running water.

vii. Unscrew the atomiser body, nozzle

and cap from the salt solution filter

housing.

viii. Wash the atomiser body and nozzle

in warm running water.

ix. If the nozzle is blocked, clear the

obstruction with fine wire. Take care

not to damage the cone.

Reassemble the Salt Spray Atomiser.

64

4.2.4 Maintenance & Replacement of Humidity

sensor

Sensor in normal position, within protective plastic sheath,

revealing only the tip of the sensor, to minimise the number

of water droplets running over the sensor.

The hose attachment supplies compressed air forming an

air curtain during acidic salt spray tests.

Filter cap – keep clean by rinsing with fresh water

periodically.

Protective plastic sheath removed to reveal entire humidity

sensor probe.

Filter cap unscrews from sensor to reveal electronic sensing

element inside.

This filter can be removed for cleaning or replacement. In

either case, the chamber must not be operated until the

filter has been correctly screwed back into position (finger

tight only).

The entire sensing probe can be removed from its

mounting if it is in need of replacement. It is held in place

by a locking ring, which needs to be rotated to release the

probe. Full fitting instructions are provided with

replacement probes.

65

4.3 Sample Daily Check Sheet

Daily Checks for Month: ……………………………

Day

Chamber

Temp (°C)

Air Saturator

Temp (°C)

Air

Pressure

(Bar)

Fallout

(ml/80cm²

/hour)

pH

of Fallout

Water

Conductivity

(µs)

%

Concentration

of Salt Solution

/Specific

Gravity

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

66

Part 5 – Fault Finding and

Problem Solving.

Technical Support and solutions to common

faults or problems can be found by logging on

line to Ascott’s Chamber Doctor application.

Access is free for the first 12 months from

receiving the chamber. Further access can be

obtained by contacting Ascott Technical

Support.

Silver and Gold Technical support packages,

where direct access to an Ascott engineer

after warranty periods expire can also be

purchased. Please contact Ascott Technical

Support for assistance on Tel: +44 1827 318040

or Fax +44 1827 318049

Ascott Manual S Ip Range

Documents

Transcript of Ascott Manual S Ip Range