User Manual

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Conductivity Calibration
6.3.1. Rinse the electrode in distilled water, allow it to dry, wash with a little of
standard solution and dip it in standard solution. Stir the solution briefly and allow it
to stay in the solution until a stable reading is reached.
6.3.2. Press key to enter the calibration mode.
The meter’s display will show blinking “CAL” at the top right, and scanning and
locking process of calibration solution at the bottom right. When the meter locks1413
mS, stable icon will display on LCD. Press key to complete calibration.
The meter will return to measuring mode and is displayed on bottom
left of the LCD screen. See Figure-11.
6.3.3. Notes:
(a) Pressing key before stable icon appeared on LCD screen,
Error indication icon Er 2 will be shown. See Table -11.
(b) Press key before confirmation to exit calibration mode (calibration will not be completed).
6.3.4. For multi-point calibrations, please repeat the steps in 6.3.1 to 6.3.2 until all
calibrations are finished. The meter can be calibrated in the same calibration solution repeatedly until the reading is
stable and repeatable.
TDS & Conductivity
6.4.1. TDS and conductivity is linear related. The conversion factor is 0.40-1.00. Adjust the factor from parameter
P2.6. The factory default setting is 0.71 and please refer to section 7.4. The meter only needs to be calibrated in
Conductivity mode, then after calibration of conductivity, the meter can switch from conductivity to TDS.
6.4.2. Adjust TDS conversion factor in parameter setting P2.7 according to the data collected during testing and
experience. Table – 10 lists some commonly used Conductivity and TDS conversion factors. This is for your reference
only.
Table – 10 Conductivity and TDS conversion factors
Conductivity of solution
TDS conversion factor
0-100 μS/cm
0.60
100-1,000 μS/cm
0.71
1-10 mS/cm
0.81
10-100 mS/cm
0.94
Figure-11
Figure-6