Xylem WQ pH SENSORS User Manual
Page 11
Global Water
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be used for measurements in water samples of different temperatures.
Without temperature compensated the conductivity readings would
change as the temperature changed, even though the actual ion
concentration did not change. CAUTION: When using the sensor in
solutions with different temperatures the sensor must be left in the new
solution for a minimum of 20 minutes prior to taking a valid reading.
f. To check the Conductivity sensor calibration you will need the
following equipment:
3 small containers
1 bottle of distilled water
1 bottle of 5000 uS solution
1 power supply
1 current meter
Connecting wires as necessary
Connect the sensor to the power supply and current meter in
the following way. Attach the black wire to the ground terminal of the
power supply. Attach the white wire to the positive input of the current
meter. Connect the ground terminal of the power supply to the ground
of the current meter. Attach the red wire to the positive terminal of the
power supply. See Appendix C. Warning: Always connect the
sensor with the power turned off.
See Appendix A for the conductivity calibration worksheet.