Chapter 3 pH MEASUREMENT
3.4 Calibration Setting
F-52, 53, 54, 55 55
The measurement values during the periodical check are displayed after the calibra-
tion is cleared.
4. When the check is completed, the result data is automatically printed out.
●
OK/CHECK OK (satisfies the regulation)/CHECK
(does not satisfy the regulation)
●
Calibration
●
Asymmetry potential (Within regulated value ± 3 mV)
●
Sensitivity (99% to 101% of regulated value)
●
Linearity Indication error at each input
(Regulated value ± 0.010 pH ± 1digit)
●
High impedance Indication error at each input
(Regulated value ± 0.030 pH ± 1digit)
●
Temperature Indication error at each input
(Regulated value ± 0.4 ℃ )
Sample printout
When the judgment of “CHECK” is displayed, check the connection and repeat the check.
When the error repeatedly occurs, call customer service.
OK/CHECK judgment
Date of check
Linearity
Calibration by standard solution
Temperature
High impedance
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