Ref: P .ppt (18/04/23) 1EUROTHERM CONTROLS

26/2704 Vacuum Feature26/2704 Vacuum Feature

•What is vacuum•Vacuum in industry•Why use vacuum•Current solutions•Features of 2704 Block•Selling benefits

Cameron Large26/2704 Product Manager

Ref: P .ppt (18/04/23) 2EUROTHERM CONTROLS

What is VacuumWhat is Vacuum

Definition: A Space entirely void of matter

•Gauge pressure(atmosphere) : 1013mB(760Torr)•Absolute pressure : 0mB(0Torr)

: 1 mB = 0.75Torr

Absolute0mB

Gauge1013mB

Increasing PressureIncreasing vacuum

High Pressure

Low Vacuum

High Vacuum

Low Pressure

Ref: P .ppt (18/04/23) 3EUROTHERM CONTROLS

Vacuum in IndustryVacuum in Industry

Applications;•Vacuum heat treatment

•Annealing,melting,casting,sintering,brazing etc•Chemical Processes

•Distillation, freeze drying•Semiconductor

•Diffusion,MBE,CVD•Environmental test

•Altitude simulation•Composite curing autoclaves•High quality ceramics•Research & development•Lots more!!!

Ref: P .ppt (18/04/23) 4EUROTHERM CONTROLS

Why use VacuumWhy use Vacuum

•Creates pure atmosphere for heat treatment•No oxidisation of component surfaces•Vacuum brazing requires no flux•Ability to process special alloys

•Prevents atmosphere reacting with the process•Allows particles to move without collision•Removable of water vapour from organic substances by sublimation•Simulation of space conditions•Reduced distillation process time

Ref: P .ppt (18/04/23) 5EUROTHERM CONTROLS

Vacuum MeasurementVacuum Measurement

•Various vacuum sensor technologies•Pirani,Penning,Active Inverted Magnetron(AIM)•Modern gauges output 2-10vdc, calibrated for air•Output signal is usually logarithmic•Every gauge has a different curve•Some wide range gauges are being introduced

1.0-E08

Increasing vacuum(mB)

1.0+E03

1.0-E06

1.0-E04

1.0-E02

1.0+E00

Pirani measurement range

10vdc2vdc

AIM or Penning measurement range

2vdc 10vdc

Ref: P .ppt (18/04/23) 6EUROTHERM CONTROLS

Traditional Heat Treatment Traditional Heat Treatment FurnaceFurnace•Main control components

•Temperature programmer(High performance)•Possible slave temperature controllers•Vacuum controller(Not PID) with multiple setpoints•PLC: Size depends on application•Lots of cable

PLC

Temp Programmer

Vacuum Controller

Temp Input

Control Output

Vacuum Inputs

Process StartVacuum pumps & valves

Setpoint outputs

Digital status information

Ref: P .ppt (18/04/23) 7EUROTHERM CONTROLS

The Vacuum SequenceThe Vacuum Sequence

Traditional vacuum controller•Main suppliers Edwards, Leybold, Pfeiffer and Varian •Price range £700-£1300 dependent on No of inputs•3 inputs common in heat treatment•Function as alarm units providing relay outputs toswitch pumps and valves•Provides no PID or logic control functions

Isolation Valve

Diffusion Pump

Furnace

Roughing Pump

Vacuum

Low vac

High vac

Backing vac

PLC

Ref: P .ppt (18/04/23) 8EUROTHERM CONTROLS

Why Introduce a Vacuum FeatureWhy Introduce a Vacuum Feature

•Vacuum furnaces require high performancetemperature control•Eurotherm are already strong in this market

•Excellent knowledge of potential customers•Traditional competitors do not have this feature•Existing vacuum controllers cannot do temperature•Provides Ideal machine control applications•It gives us real user benefits to promote•We can command large selling margins

Ref: P .ppt (18/04/23) 9EUROTHERM CONTROLS

Main Issues to ResolveMain Issues to Resolve

•Non-Linear inputs•Use Poly-fit to generate curves

•All gauge manufactures have different curves•Curves will be stored in iTools

•Vacuum display must be in scientific notation•New resolution type has been introduced(SCI)

•Multiple On/Off setpoints required•Introduction of unique features•Combine Temp/Vacuum in one unit

•Reduce system cost

Ref: P .ppt (18/04/23) 10EUROTHERM CONTROLS

2704 Vacuum Block2704 Vacuum Block

Application Software Option•V1 = 1 gauge input•V3 = 3 gauge input•PID loop not required

Block Features•1 or 3 gauge input•Scientific display in mB,Torr,Pascal•Hi/Lo Vac gauge switchover •6 On/Off setpoint outputs•High vacuum gauge enable signal•Roughing pump timer•Leak detection routine

Ref: P .ppt (18/04/23) 11EUROTHERM CONTROLS

Vacuum Heat TreatmentVacuum Heat Treatment

Hi Vac Gauge

TemperatureControl Loop

Heating

Cooling

Setpoint Programmer

mB

VacuumFunction

Block

Temp SP Program

Events

Run

Hold

Reset

Control Sensor C

Lo Vac Gauge mB

Backing Gauge mB

SP1

SP6

Vacuum outputs CombinationalLogic

WaitAlarmsLoad Sensors

Ref: P .ppt (18/04/23) 12EUROTHERM CONTROLS

Our Selling BenefitsOur Selling Benefits

•Temperature & Vacuum in one unit•Massive advantage over companies like Honeywell, Yokogawa, Edwards, Leybold etc

•Control of diffusion pump temperature•Totalise running time and provide alarm

•Provide additional maths & PLC functions•Reduces the size, or removes the PLC

•Offer unique features•Automatic gauge switch-over•Roughing pump timer •leak detection

•Interface to any “Active Type” gauge•Not tied to one manufacturer

•Reduce total system cost•Increase our sales and margins