The DF-745SG Nano Trace moisture analyser is a Tuneable Laser Diode sensor based analyserwith application software specifically designed for blending specialty gases involving singlegases and gas mixtures drawn from a database of 12 standard background gases with blendsof up to 8 different gases.

DF-745SG

Highly stable tuneable laser diode sensor

Simple operator interface

Fast response and stabilization between gases and gas blends

Suitable for pure and speciality gas blends

Specialty gas cylinder quality controlBulk gas cylinder quality control

FEATURES APPLICATIONS

PROCESS ANALYSERS

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DF-745SG

KEY FEATURES

Application Specific Software InterfaceSoftware allows operators to select blend or pure gas in which moisture will be measured as well asarchive time, date, make-up of blend and moisture content.

Recipe Storage and RecallAnalyser stores and recalls specific blends which are measured on a regular basis and reduces set-up timebetween cylinders.

Multiple Background MeasurementsCompatible for use with pure or blended N2, Ar, CO2, Ne, N2O, O2, He, SF6, Kr, H2, CO, Xe gases.

The DF-745SG is in compliance with:

Low Voltage Directive (2002/73/23EEC).

EMC Directive (2001/89/336/EEC).

EC DIRECTIVE COMPLIANCE

ELECTRICAL SAFETY

Electrical safety to IEC 61010-1: Ed 2. The product is rated for “Installation Category II” in accordance with IEC 60664-1. The product is rated for “Pollution Degree 2” in accordance with IEC 60664-1.

DESCRIPTION Options

Power lead: There are 2 options for the Power lead:100-220V ac220-240V ac

Outputs: Analyser supplied with a non-isolated 4-20mA & 0-1, 0-2, 0-5, or 0-10V dc as standard

Mounting: The DF-745SG comes standard with a NEMA 1, 19” rack mount

User manual:

American

Analogue and voltage output

Rack mount

English

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DF-745SG

SPECIFICATIONS Gas Type: H2O

TECHNOLOGY Tuneable Laser Diode

PERFORMANCE

Operating ranges: 0-100ppm

Smallest recommendedoutput range:

0-1ppm

Intrinsic error (accuracy): 0-20ppm range +/-5% of reading or +/-25ppb (whichever is greater) 21-100ppm range +/-10% of reading or+/-100ppb (whichever is greater)

Response time (T90) at sample flow rate:

<3 minutes at 1 litre/min

Zero drift/month: Negligible

Span drift/month: Negligible

Lower detection Limit (LDL): 100ppb

Upset recovery time: <5 minutes to return to within 1ppm of previous stable reading OUTPUTS/INPUTS

Output: Isolated 4-20mA dc, and choice of 0-1, 0-2, 0-5, or 0-10V dc

Output range: Scaleable to any range between 0-1ppm to 0-100ppm

Audible/visual alarms: 4 Moisture levels, temperature, moisture sensor diagnostic, analyser off-line, expanded range

Dual scale range: Two user selectable secondary analogue output ranges for rescaling the output once the primary range isexceeded

Relay contacts: Up to 4 non-latching, independently assignable to alarms or indicators. SPDT contacts rated for 1amp at 30V dc.

Serial communications: Factory configured RS232 or RS 485 two-way serial communications

Gas scale factor: Background gas compensation for gases other than N2

Mounting: 19” rack mount NEMA 1 enclosure

OPTIONS

Hydrogen safety system purge: Optional safety system for use with hydrogen includes Sample Delivery Interlock and Case Purge Valves forinstrument housing, and enclosure and purge protection system for optional external vacuum pump. HydrogenSafety System can be ordered with or without the enclosure and purge protection system for the optional vacuumpump (NOTE: Hydrogen Safety system limits available relays from 4 to 3)

Isolation package: Includes upstream and downstream internally air actuated electropolished isolation valves to isolate cell duringtransport and upon loss of power. Package also includes Bypass Rotameter and Inlet Pressure Regulator (ratedup to 150psig), and a back flow prevention valve. DF-745SG’s with this option require 60-100psig connectionto 1/8” compression inlet fitting for valve actuation

Custom gas calibration: DF-745SG is configured with 12 standard gases and up to 10 additional gases can be added as an option

SAMPLE GAS

Temperature: 10°C to 80°C (50°F to 176°F)

Dewpoint: 5°C (9°F) below minimum ambient

Condition: Oil free, non-corrosive, non-condensing

Particulates: Filtered to 2µm

Vent pressure: Vent to atmosphere

Sample flow: 0.5 to 4l/min

Sample pressure: 5 to 30psig (1.36 to 3.08 BarA)

AMBIENT CONDITIONS

Temperature: +10°C to +40°C (50°F to 105°F)

Relative humidity: 0 to 95% RH non-condensing

Altitude: 2000 meters above sea level

NOTE: Sample to be free of acidic components.For samples containing acidic components contact Servomex for sample preconditioning options.

DF-745SG

NOT USED

1.55 [39.25]

7.11 [180.59]

3.63 [92.08]2.54 [64.44]1.95 [49.40]

23.93 [607.70]

(19.00 [482.60])

7.83 [198.90]

7.71 [195.77]

19.00 [482.60]

18.31 [465.12]

1.49 [37.72]

.34 [8.74]

7.50 [190.50] 10.47 [265.94]

EnterNextMenuESC

55 RLY4-COMRLY2-COM

RLY1-COM

RLY1-NO

RLY1-NC

KEY

44 RLY3-NC

1

2

3

KEY

3

2

1 RLY3-COM

RLY3-NO

RLY2-NO

RLY2-NC

GND 8

6

7

GND8

7

6 RLY4-NO

RLY4-NC

RX+

TX+

33

1

2

1

2

4-20mA-

4-20mA+

TX-

GND

RX-

KEY

8

7

6

4

5

KEY

GND8

7

6

4

5 AOUT-

AOUT+

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1.49 [37.85]

9.45 [239.90]

16.17 [410.72]

6.94 [176.28]

16.33 [414.78]2 PLS

17.55 [445.69]

22.38 [568.45]

16.58 [421.01]2 PLS

DIMENSIONS

All dimensions shown in inches (mm)

SAMPLE WETTED MATERIALS

Analyser fitted with:Stainless steel G10 EpoxyPolypropyleneTygonSapphire

SERVICE & SUPPORT

For new installations and replacement of olderServomex and competitor products, we will workwith you to develop a bespoke service and supportpackage, ensuring full measurement availability andplant operation within your timescales and budget.

UTILITIES REQUIRED

Power: 110V ac or 230V ac 50/60 Hz

Pneumatic pressure for isolation package option: 60 to 100psig (5.1 to 7.9 BarA)

TECHNICAL CENTRES

SYSTEMS ENGINEERING CENTRES

BUSINESS CENTRESServomex Group LimitedCrowboroughEast Sussex, TN6 3FBUKTel: +44 (0)1892 652181 Fax: +44 (0)1892 662253

Servomex Company Inc4 Constitution WayWoburn, MA 01801 1087USATel: +1 781 935 4600 Fax: +1 781 938 0531Toll Free: 1 800 433 2552

Crowborough, UK Tel: +44 (0)1892 652181 Houston, USA Tel: +1 281 295 5800Shanghai, China Tel: +86 (0)21 6489 7570Mumbai, India Tel: +91 22 39342700

Servomex has a policy of constant product improvement and reserves the right to change specifications without notice. © Servomex Group Limited. 2012. A Spectris company. All rights reserved. DF745SG Rev.1 07/12 E

EUROPE (Europe and Africa)Tel: +31 (0)79 330 1580Fax: +31 (0)79 342 0819Toll Free : 00800 7378 6639

www.servomex.com www.hummingbirdsensing.com

USA & CANADATel: +1 281 295 5800Fax: +1 281 295 5899Toll Free: 1 800 862 0200

LATIN AMERICA/MEXICOTel: +55 11 5188 8166Fax: +55 11 5188 8169

INDIA Tel: +91 22 39342700 Fax: +91 22 39342701

MIDDLE EASTTel: +971 6 5528073 Fax: +971 6 5528074

ASIA PACIFICTel: +86 (0)21 6489 7570Fax: +86 (0)21 6442 6498

Thank you for reading this data sheet.

For pricing or for further information, please contact us at our UK Office, using the details below.

UK OfficeKeison Products,

P.O. Box 2124, Chelmsford, Essex, CM1 3UP, England.Tel: +44 (0)330 088 0560Fax: +44 (0)1245 808399

Email: sales@keison.co.uk

Please note - Product designs and specifications are subject to change without notice. The user is responsible for determining the suitability of this product.