eutech-instruments 2-wire conductivity transmitter ユーザーズマニュアル
68X256902 Rev 1 10/99
6
Before 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).
connected as above. Connect Amp meter to the 4/20mA output of
Transmitter (Appendix 1).
7
Conductivity Transmitter Calibration
Prepare fresh Calibrating solutions.
1)
Hold electrode in air (electrode MUST be dry) and Amp meter should
read 4mA; if not, calibration is necessary;
read 4mA; if not, calibration is necessary;
2)
Locate “Zero adjustment” trimmer; Using a fine screwdriver,
slowly turn trimmer till Amp meter reads 4mA;
slowly turn trimmer till Amp meter reads 4mA;
3)
For greater accuracy, adjust the slope with Standard calibrating
solutions;
solutions;
4)
Rinse probe in de-ionised water and immerse in standard solution;
5)
In 1413
µµS solution, the output is 5.1304 mA;
6)
In 2764
µµS solution, the output is 6.2112 mA;
7)
In 12.88 mS solution, the output is 14.304 mA;
8)
Using a fine screwdriver, slowly turn trimmer, marked ‘FSMS’, till
Amp meter reads correct mA value with respective Standard
solutions.
Amp meter reads correct mA value with respective Standard
solutions.
9)
Remember to disconnect Amp meter and close cover.
NB: For other Standard values, expected current output is based on:
mA = {(16/20) x Conductivity value of Standard soln} + 4mA
8
Specifications
Model
ECCONXTR
Range
0.00 TO 20.00 mS
Accuracy
2% Full Scale
Calibration
2 pts
Input
3-wire (2-wires for Conductivity cell; 1 wire for
Thermistor)
Output
4-20 mA
Operating
Voltage
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
9
Appendix 1
Connecting Amp Meter for Calibration
Figure 3 - Method One
Figure 4 - Method Two
10 Ordering Information
pH
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
integral 5m cable
ECDOGEN
General Purpose D.O. probe, 0 – 10 ppm, Industrial,
integral 5m cable
integral 5m cable
ECDOTPll
ORP
Item
Cat Code
ORP Transmitter
ECORPXTR
Combination Platinum ORP Electrode, w/PMP,
integral 5m cable
integral 5m cable
ECHTPTTSO05B
Combination Gold ORP Electrode, w/PMP, integral
5m cable
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