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8 Calibration
70
✱
Accept the zero point with the
key or
use the
key to reject the value.
The instrument returns to the measurement mode.
8.1.2
2-point calibration
Requirements
- The supply voltage for the instrument must be present.
see Chapter 4 “Electrical connection”, page 12ff.
- A combination electrode must be connected to the transmitter.
- "PH STANDARD" must be configured as the sensor in the basic settings.
- Calibration must be enabled,
see Chapter 6.9.1 “Administrator levels”, page 39.
- The transmitter is in the measurement mode.
✱
Immerse the combination electrode in the first buffer solution with a known
pH (e.g. 4.00).
PGM
EXIT
The buffer solutions (reference solutions) used for calibration must
differ by at least 2 pH.
During calibration, the temperature of the two buffer solutions
must be the same and must remain constant.
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