Xylem WQ pH SENSORS - Manual (Page 21)

Global Water
800-876-1172
• globalw.com
- 21 -
Conductivity Calibration check
Step 1) Fill one container with tap water and another with 5000 uS
solution. Ensure that the solution covers the bottom 2” of the
sensor.
Step 2) Place the conductivity sensor into the container with 5000 uS
solution. Turn on the power supply and the current meter. Let
the sensor stabilize for 5 minutes before taking any
measurements. (20 minutes if the sensor’s temperature is
different from the solutions.)
Step 3) Record the output current of the sensor, X = _______. Remove
the sensor and rinse it off in the tap water.
Step 4) Fill a container with distilled water.
Step 5) Place the conductivity sensor into the container. Turn on the
power supply and the current meter. Let the sensor stabilize
for 5 minutes before taking any measurements. (20 minutes if
the sensor’s temperature is different from the water.)
Step 6) Record the output current of the sensor, W = _____.
Step 7) The low current value for the sensor is equal to W. This current
is the output current the sensor would produce if the
conductivity were 0.
Step 8) The high current value for the sensor is equal to X. This
current is the output current the sensor would produce if the
conductivity were 5000 uS.
Step 9) Use these new current values to recalibrate the system that is
monitoring the sensor output.