24
SECTION 2,
continued
If a temperature probe is connected properly, the meter will
display the current sample temperature and will not allow the
temperature to be manually set.
To manually set the temperature
When a temperature probe is not used to supply the temperature
for pH temperature compensation, the default temperature
(20 °C) will be used. In either case,
Default
will be displayed
above the temperature.
To change the default temperature, first put the meter in Reading
or Calibration mode. Press the arrow
keys to increase or decrease
the displayed default temperature value to the desired
temperature. The value adjusts in 0.1 °C (0.1 to 0.2 °F)
increments. To scroll rapidly, hold the arrow key down.
Note: Acceptable temperatures range from -10 to 110 °C.
To change the units of temperature measurement, see Section
3.1.3 on page 26.
2.7
Millivolt Measurements
The meter can be used to measure absolute millivolts (mV). To
display a current millivolt reading, press the
pH/mV
or
ISE/mV
key.
The mV value is displayed with
mV
in the units field. Press the
key again to return to pH or ISE measurement units.
Absolute millivolts are displayed with 0.1 mV resolution in the
range of -2000.0 to +2000.0. The millivolt mode is useful when
measuring oxidation-reduction potential, performing
potentiometric titrations, or preparing calibration curves. Detailed
instructions for any Hach electrode are given in the electrode
instruction manual. Titration instructions are included in the Hach
ORP Electrode Instruction Manual, or in standard analytical
chemistry texts.
