Ph Calibration By Manual Input - horiba HP-200 Instruction Manual

Measurement

pH calibration by manual input

For this calibration, manually enter the calibration value for pH.
Operation procedure
Enter the manual input pH cal mode from the meas mode.
1. Hold down the HOLD key in the meas mode until the HOLD indicator turns ON.
The hold mode will become active with HOLD displayed on the upper left part.
The transmission output stops with the measured value held.
2. Press the [ ] key to display "CAL" on the display part for the measured value and
then press the ENT key.
"PH" will be displayed on the auxiliary display part.
3. Press the [ ] key to display "PH.Adj" on the auxiliary display part and then press
the ENT key.
The STD value input
4. Press the [ / ] key to enter the STD value.
[ ] key: Changes the value in increments of 0.1 mV
[ ] key: Changes the value in decrements of 0.1 mV
The setting range is between -90.0 mV and 90.0 mV.
5. Press the ENT key.
The STD value will be established. The SLOPE input screen will be displayed and the
auxiliary display part will start blinking.
6. Press the [ / ] key to enter the SLOPE value.
[ ] key: Changes the value in increments of 0.1 mV/pH
[ ] key: Changes the value in decrements of 0.1 mV/pH
The setting range is between 40.0 mV/pH and 65.0 mV/pH.
7. Press the ENT key.
The SLOPE value will be updated.
Now the pH calibration by manual input is complete with the Cal menu displayed.
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??? screen will be displayed in the pH manu input cal mode.