Conductivity Meter Calibration

Conductivity Meter Calibration
Key Points
1. After receiving a new conductivity meter remove the electrode cap and soak
the meter for a few minutes in alcohol to remove oils. Do not submerge the
meter below the cap line. Rinse with water and gently blot dry with a paper
towel.
2. Always calibrate the conductivity meter with the Sodium Chloride Standard
Solution prior to each sampling event. It should be calibrated to read 1000
μS/cm ± 10 μS/cm (preferably within 12 hours). Remember that μS/cm and
μmhos/cm are interchangeable. The old data sheets still have μmhos/cm as
the increment for reporting conductivity, but the new sheets, provided in this
notebook, have been updated to reflect that the meters we now use report
conductivity in μS/cm.
3. To calibrate, use the following instructions which are also located inside the
conductivity meter case.
Open the battery compartment lid (end with lanyard loop). The
two white buttons are Increment (INC) and Decrement (DEC)
calibration keys.
Rinse the electrode in deionized water, then rinse it in calibration
standard (solution), then dip it in a container of calibration
standard.
Switch unit on (ON/OFF) key). Wait several minutes for display
to stabilize
Press the INC (increase) or DEC (decrease) keys to adjust reading
to match the calibration standard value.
After 3 seconds without a key press, the display flashes 3 times,
then shows “ENT”. The tester accepts calibration value; returns to
measurement mode. The meter is now calibrated.
Replace battery cap.
4. Be sure the probes are dry when storing the meter.