Millivolt Operation - Fisher Scientific accumet XL150 accumet XL200 accumet XL250 accumet XL500 accumet XL600 Reference Manual

Ion Operation: Incremental Methods
XL25, 50 and 60 meters
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MILLIVOLT OPERATION

This mode is used to measure oxidation/ reduction potential (ORP/Redox), perform titration, and to verify
the function of the meter. The mV measure function allows you to continuously monitor the mV potential of
the electrodes in use. This can be done in either absolute (abs) or relative mV (Rel mV).
In millivolt mode, the current millivolt output from the electrodes being used is monitored and displayed on
the screen. The meter will continually monitor the millivolts reading in this mode and will not lock onto a
single reading. However, once the reading has become stable, the STABLE indicator will appear.
Relative mV Standardization:
The relative mV mode allows adjustment of the displayed value ±150 mV.
1. After rinsing your electrode(s) with clean water, immerse into the mV (ORP) standard solution, provide
gentle mixing and wait for the STABLE indicator to appear.
2. Select Rel mV to access the Relative mV screen.
3. Select SET to set the relative mV using numeric keypad.
4. Select Enter to confirm the value, or DEFAULT to accept the default value (0 mV).
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