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appearance of the STABLE annunciator). The pH
reading may be recorded at this time.
a. If AUTO is not displayed, the auto read hold
function is not active, and the meter will
continuously monitor the live pH value.
b. If AUTO is displayed, the meter will lock the
measured value on the screen when the
STABLE annunciator appears. To release the
locked value and obtain a new reading, press
setup/meas. AUTO will flash until a stable
reading is obtained and the new value is locked.
Note: enabling the AUTO read hold function
can lead to erroneous values if the electrode
is slow to respond such as testing of
viscous
temperatures, etc.
6. mV OPERATION
AP meters display absolute mV values
zero mV. Although, calibration doesn't apply to
absolute measurement, a check of the zero value can
be performed by connecting the BNC shorting cap and
observing the mV reading. See Relative R.mV section
for offset standardization.
6.1 Using setup in mV mode to select options
1. Press mode to select mV measurement mode.
2. To change the mV resolution press setup/meas
until '88888' appears. Press std/enter when the
desired resolution is displayed below;
8888.8 to select 0.1
8888 to select 1
3. To activate or deactivate the Automatic Shut off
function press setup/meas until 'A.Off' appears.
Select 'Yes' or 'No' by using the save/▲or
view/▼keys and press std/enter to confirm your
selection. If 'Yes' is selected, the meter
automatically turns off after 20 minutes of inactivity.
Note: Selecting 'No' can result in total battery
or
dirty
9
samples,
—
referenced to
changing
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