Hanna Instruments HI 9828, Инструкция по эксплуатации

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If the conductivity input is not within the
acceptable range, the message “IN-
VALID INPUT” will be shown.
4.5 ATMOSPHERIC PRESSURE
A reference barometer is needed. During calibration, a maximum difference of
40 mbar between current reading and the calibration point is allowed.
4.5.1 Procedure
After choosing the Atmospheric pressure calibra-
tion mode in the calibration menu, select the type
of calibration with the arrow keys and then press
OK.
• Select the unit measure and insert the pressure
value with the keyboard.
• Press OK and wait for the measure stability.
• When the reading is stable, press CONFIRM
to accept the value.
• Press OK or ESC to return to calibration or main menu respectively.
• To restore the factory calibration, select this option in the pressure calibration
menu and then press OK.
4.6 ORP CALIBRATION
It is possible to calibrate at one custom point or
restore the factory calibration.
4.6.1 Procedure
• Fill a beaker with a ORP solution (see ACCESSORIES chapter).
• Select “CUSTOM ORP” and press OK.
• With the keyboard insert the value of solution
and press OK.
• When the measure is stable, press CONFIRM
to accept the calibration.