User manual EUTECH INSTRUMENTS 2-WIRE DISSOLVED OXYGEN TRANSMITTER

[. . . ] EUTECH INSTRUMENTS 3 Diagram and Dimensions (in mm) 2-Wire Dissolved Oxygen Transmitter Operating Instructions 4 Installation Operating with one or several Transmitters: Figure 1 - Operating with 1 Transmitter 1 Preface Thank you for purchasing the Eutech 2-wire Dissolved Oxygen Transmitter. [. . . ] Eutech Instruments does not accept any responsibility for damage or malfunction of the unit due to improper installation or operation of the Transmitter. Copyright ©1999 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: marketing@eutechinst. com; Home page: http://www. eutechinst. com Figure 2 - Operating with several transmitters 5 2 Introduction Electrical Connections 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. 68X256903 Rev 1 10/99 6 Before Calibration 10 pH Ordering Information Item Cat Code ECPHXTR ECARTSO05B ECARGTSO05B 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). pH Transmitter 7 1) 2) 3) 4) 5) 6) 7) 8) Dissolved Oxygen Transmitter Calibration Short Dissolved Oxygen input and observe Amp meter display; Amp meter should read 4mA; if not, calibration is necessary; Locate "Offset adjustment" trimmer; Using a fine screwdriver, slowly turn trimmer till Amp meter reads 4mA; For greater accuracy, adjust the slope using Air as a reference; Hold the dry probe in Air; In 100% Saturation (in Air), output is 12 mA; In 200% Saturation, output is 20 mA; Using a fine screwdriver, slowly turn trimmer, marked `Slope', till Amp meter reads correct mA value with respective Oxygen Saturation levels. Remember to disconnect Amp meter and close cover. Combination pH Electrode, General, integral 5m cable Combination pH Electrode, w/PMP, integral 5m cable Dissolved Oxygen Item Dissolved Oxygen Transmitter General Purpose D. O. [. . . ] for 24V Conductivity Item Conductivity Transmitter 2-Pin SS, k=1. 0, integral 3m cable Cat Code ECCONXTR ECCONSEN46 Model Range Accuracy Calibration Input Output Operating Voltage Load Temperature Item Temperature Transmitter Pt 100 probe, SS316 Cat Code ECTEMPXTR ECPT10001M or ECPT10005M Power Supply Item 120V Power Supply 220V Power Supply Cat Code EC-120-XTR EC-220-XTR Housing 77 x 77 x 28 mm, field mountable 9 Appendix 1 Connecting Amp Meter for Calibration Figure 3 - Method One Figure 4 - Method Two 68X256903 Rev 1 10/99 [. . . ]