horiba LAQUA-PH1500, Instruction Manual

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ORP Calibration
13
● ORP/mV Calibration
Calibration is necessary for accurate ORP measurement. To perform ORP calibration, follow
the procedure detailed below:
Prerequisites
• Clean the ORP electrode with DI (deionized) water and wipe it with tissue paper.
• Switch on the pH meter and plug in the ORP electrode.
• Prepare standard solution required for calibration.
• Ensure that the meter is in measurement mode.
• Dip the ORP electrode into the standard solution ensuring that the solution level is at least
3 cm from the electrode tip.
• Absolute value measurement mode and relative value measurement mode are the two
types of measurement mode available for ORP (mV) measurement.
• In absolute value measurement mode, the handheld meter displays the actual voltage
value.
• In relative value measurement mode, user can adjust the absolute mV value by calibration.
If the mV value is adjusted, the meter automatically indicates relative mV value as RmV .
The adjustment mV is applied as an offset to the absolute mV value.
• In the relative mV mode, the absolute mV value can be adjusted by ± 200 mV.
To abort an ongoing calibration process at any point of time, press the key.
Note
Tip