Ph & mv mode – Hanna Instruments HI 901 User Manual
Page 97
7-7
pH & mV MODE
7.2.2
mV Menu
By pressing
, the following screen will be displayed:
7.2.2.1 Auto-Zero Relative mV
This sets the relative potential to zero by saving the current potential and subtracting it from
subsequent readings.
If an absolute zero is needed, replace the electrode with a shorting cap before performing
this action.
Note: The auto-zero will affect the mV reading and therefore the pH value (new displayed
relative mV reading will be used to calculate the new pH value).
7.2.2.2 Enter a Manual Relative mV
Allows to enter the mV offset . The range is from 2000.0 to 2000.0 mV.
The set value is subtracted from the actual readings from electrode.
In this case, the actual readings are displayed in the mV readings field and rel icon is
displayed near the mV units.