Model WQC-30 6.3 Calibration of Electrical Conductivity
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6.3 Calibration of Electrical Conductivity
(1) Key points of Electrical Conductivity Calibration
(a) The electrical conductivity measuring system does not require routine calibration. You can use
the instrument in its condition as default.
(b) The cell constants of the electrical conductivity cell will vary by dint of its smear and pole
surface condition change as it is used many times. In order to ensure continuation of proper
measurements, periodically check the cell constants and calibrate them when necessary. >> “6.3
(2) Electrical Conductivity Cell Check”, “6.3 (3) Cell Constant Calibration”
(c) The salt content is calculated by conversion from the electrical conductivity. For accurate salt
content measurement, therefore, the cell constant of the electrical conductivity should be
calibrated.
(d) The blinking or lighting of on the screen indicates that the interval memory is valid.
(This is cancelled by default.) At the calibration, cancel the interval memory. >> “7.3 (2)
Changing the interval method and time”
INT. symbol
(e) Prior to calibration, check if maintenance inspection is routinely carried out. If not, carry it out
before calibration. >> 9. Maintenance and inspections
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IMPORTANT
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If maintenance inspections such as “Taking care of the electrode”
have not been performed, proper calibration may not be performed.
(f) When using the protective cylinder suited for boring, always calibrate the cell constants.
(2) Electrical Conductivity Cell Check
(a) By using a “Solution C for checking the electrical conductivity cell” (No. 0B100001, separately
available at cost, hereinafter referred to as “So±lution C for Checking) of our own make, you
can check the electrical conductivity cell to see if it is normal.
(b) The concentration of the “Solution C for Checking” is based on the electrical conductivity of
140.9mS/m ± 3% (1.409mS/cm ± 3%) (at 25 ºC).
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IMPORTANT
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This “Solution C for Checking” is designed solely for the checking. It is
not applicable to the calibration of the cell constants.
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