EUTECH INSTRUMENTS 2-WIRE TEMPERATURE TRANSMITTER Manuale utente

68X256904 Rev 1 10/99

EUTECH INSTRUMENTS

2-Wire Temperature Transmitter

Operating Instructions

1Preface

Thank you for purchasing the Eutech 2-wire Temperature Transmitter.

This manual serves to explain the correct installation and operations of

the XTR Transmitters. Other Transmitters available individually are: pH,

ORP (REDOX), Conductivity, Dissolved Oxygen and Temperature.

•EC-PH-XTR;

•EC-ORP-XTR;

•EC-CON-XTR;

•EC-DO-XTR; and

•EC-TEMP-XTR.

The information presented in this manual is subject to change without

prior notice, as improvements are made to the product. While Eutech will

endeavor to try its best to inform the market, this does not represent a

commitment on the part of Eutech Instruments Pte Ltd.

Eutech Instruments does not accept any responsibility for damage or

malfunction of the unit due to improper installation or operation of the

Transmitter.

reserved.

Eutech Instruments Pte Ltd. Blk 55 Ayer Rajah Crescent #04-14/24,

Singapore 139 949. Tel: (65) 778 6876; Fax: (65) 773 0836; e-mail:

[email protected]; Home page: http://www.eutechinst.com

2Introduction

The Transmitter is used for the continuous measurement of pH, ORP

(REDOX), Conductivity, Dissolved Oxygen or Temperature, in conjunction

with an appropriate sensor. Data output is via 4-20 mA current output.

The Transmitter is housed in a IP65 enclosure, with openings for input

and 4-20mA output.

3Diagram and Dimensions (in mm)

4Installation

Operating with one or several Transmitters:

Figure 1- Operating with 1 Transmitter

Figure 2- Operating with several transmitters

5Electrical Connections

68X256904 Rev 1 10/99

6Before Calibration

Remove cover of Transmitter and ensure that electrode is correctly

connected as above. Connect Amp meter to the 4/20mA output of

Transmitter (Appendix 1).

7Temperature Transmitter Calibration

1) Immerse Temperature probe in water bath at varying temperatures

and observe Amp meter display;

2) Amp meter should read corresponding mA output as follows:

3) In 0oC, the output is 4 mA;

4) In 25oC, the output is 8 mA;

5) In 50oC, the output is 12 mA;

6) In 80oC, the output is 16.8 mA;

7) In 100oC, the output is 20 mA;

8) To calibrate, locate “Temp adjustment” trimmer;

9) Using a fine screwdriver, slowly turn trimmer till Amp meter reads

correct current output;

NB: For other Temperature values, expected current output is based on:

mA = {(16/100) x Temperature value} + 4mA

8Specifications

Model ECTEMPXTR

Range 0 TO 100 oC

Accuracy ±0.5 oC

Calibration 1 pt

Input 2-wire Pt 100

Output 4-20 mA

Operating

Voltage DC 12 V to 24 V

Load 100 Ohms max. for 12 V;

600 Ohms max. for 24V

Housing 77 x 77 x 28 mm, field mountable

9Appendix 1

Connecting Amp Meter for Calibration

Figure 3- Method One

Figure 4- Method Two

10 Ordering Information

Item Cat Code

pH Transmitter ECPHXTR

Combination pH Electrode, General, integral 5m cable ECARTSO05B

Combination pH Electrode, w/PMP, integral 5m cable ECARGTSO05B

Dissolved Oxygen

Item Cat Code

Dissolved Oxygen Transmitter ECDOXTR

General Purpose D.O. probe, 0.5 – 40 ppm, Industrial,

integral 5m cable ECDOGEN

General Purpose D.O. probe, 0 – 10 ppm, Industrial,

integral 5m cable ECDOTPll

ORP

Item Cat Code

ORP Transmitter ECORPXTR

Combination Platinum ORP Electrode, w/PMP,

integral 5m cable ECHTPTTSO05B

Combination Gold ORP Electrode, w/PMP, integral

5m cable ECHTAUTTSO05B

Conductivity

Item Cat Code

Conductivity Transmitter ECCONXTR

2-Pin SS,k=1.0, integral 3m cable ECCONSEN46

Temperature

Item Cat Code

Temperature Transmitter ECTEMPXTR

Pt 100 probe, SS316 ECPT10001M or

ECPT10005M

Power Supply

Item Cat Code

120V Power Supply EC-120-XTR

220V Power Supply EC-220-XTR

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