15
Since mV readings are not temperature compensated,
the ATC and MTC tags are turned off .
For accurate ORP measurements, the surface of the
electrode must be clean and smooth. Pretreatment solu-
tions are available to condition the electrode and improve
its response time (see “Electrodes, Probes and Solutions”
section for details).
Notes:
•
When the reading is out of range, the closest full-scale
value will blink on display.
•
If using pH electrode while in mV mode, the meter
will measure the mV generated by the pH electrode.
22
Notes:
• To avoid erroneous procedures, the meter automati-
cally skips the buffer used for the first calibration point.
A difference of at least 1.5 pH units is required be-
tween the two buffers used for offset and slope cali-
bration (i.e. once calibrated at either pH 7.01 or pH
6.86, the instrument automatically ignores the other
value for the second point. Same for pH 10.01 and
pH 9.18).
• During calibration, the secondary LCD shows the se-
lected buffer value. Press RANGE to display the
buffer temperature.
• To clear previous calibration and return to the default
values, press the CLR key at any time after entering
the calibration mode. The LCD will show the mes-
sage “CLr CAL” for one second, and then will return
to normal measurement mode.
