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DO NOT reuse the calibration solution. Contaminants in the solution will affect the
calibration and the accuracy. Be sure to use fresh solution each time.
For Conductivity calibration, you only need to do single point calibration. The previous
calibration data will be replaced after re-calibration. For example, if you previously
calibrated conductivity meter at 14 13 uS in the 0 to 1999 uS range, when you re-
calibrate it at 1500 u S again (also in 0-1999u S range), the previous 14 13uS will be
replaced in this range (0-1999u S). However, the meter will retain the calibration data
for other ranges which are not yet re-calibrated.
When should you do the calibration?
We strongly suggest you calibrate the probe before the first time measuring. If the
conductivity of measured solutions is <100 uS, please calibrate the meter at least once
a week to maintain specified accuracy. If the meter is used in the mid ranges, the
calibration is suggested at least once a month. If the measurement proceeds at
extreme temperature, we suggest to calibrate at least once a week.
Please follow steps below for conductivity calibration:
1. Insert the probe into de-mineralized water or distilled water for about 30 minutes
to rinse the probe.
2. Select appropriate conductivity solution for calibration.
3. Pour the solution into a clean container.
4. Turn the meter on. Enter normal mode.
5. Dip the probe into buffer and stir for about 1 minute to create homogeneous
buffer.
Tap probe to remove air bubbles from sensing area. Ensure the sensing area is
completed soaked in the solution, no bubble attached. Don’t make the sensor touch
the bottom of the glass since it will affect the conductivity.
