Horiba Scientific DS-72G, Instruction Manual

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According to the operation guide, perform the check.
When the measurement and check is completed, the result data is displayed.
Result data output
・
Measurement values
・ Cell constant (calculated from the measured standard solution values)
・
Error (difference between the cell constant written on the electrode and the calculated
cell constant (regulated value: within 5%))
・
Repeated measurement average
・
Error (difference between the setting standard solution value and the repeated mea-
surement average (regulated value: within 5%))
・
Relative standard deviation (relative standard deviation at the repeated measurement
(regulated value: within 2%))
An accurate thermometer is required for the measurement. Prepare an accurate
thermometer and perform the measurement at 20

C ±0.1

C.
The cell constant calculated in this check does not apply for cell constant calibration.
1.
Select COND periodic inspection in the check
mode screen.
2.
Tap on the right of the COND periodic
inspection.
3.
Tap the Std. sol. value to display the numerical-
key screen, and enter value of the standard
solution used for the inspection.
4.
Tap the Meas. number value, and use and
to select measurement times (3 times to 5
times) for checking relative standard deviation.
5.
After the setting is completed, tap .
To return the set value to default, tap .