Table–9 Electrode constant and measuring range
Conductivity
electrode
constant
DJST-0.1-F
conductivity
electrode
2301T-F conductivity electrode
2310T-F conductivity
electrode
Note: When testing ultra-distilled water with conductivity less than 1.0 μS/cm, a flow test should be
conducted in a flow cell.
* 1000 µS/cm
2
= 1 mS/cm
2
7.3 Information regarding Conductivity Calibration
7.3.1 Conductivity Standard Calibration Solutions
The meter uses conductivity standard solution of 84 μS/cm, 1413 μS/cm, 12.88 mS/cm and 111.8
mS/cm. The meter can recognize the standard solution automatically, and can perform 1 to 4 points
of calibration. The calibration indication icons correspond to the four standard values as shown in
Table-10.
Table-10 Conductivity Calibration Solutions
7.3.2 How often to calibrate
a) The meter has been calibrated before leaving the factory and can generally be used right
out of the box.
b) Normally perform calibration once per month.
c) For high accuracy measurements or large temperature deviation from the reference
temperature (25°C), perform calibration once per week.
d) Use conductivity standard solution to check whether there is error. Perform calibration if
error is large.
e) For new electrode or the meter has been set to factory default, perform 3-point or 4-point
calibration. For general use, choose standard solutions that are closer to the sample
solution to perform 1-point or 2-point calibration.
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