Multi 3320
ORP voltage
ba77053e04
07/2018
37
Freezes the mea-
sured value (HOLD
function)
With the HOLD function, you can freeze the current measured value. The dis-
played measured value stops changing until you switch the HOLD function off.
6.1.2
Measuring the temperature
For reproducible ORP measurements, it is essential to measure the tempera-
ture of the test sample.
You have the following options to measure the temperature:
Automatic measurement of the temperature by the temperature sensor
(NTC30 or Pt1000) integrated in electrode.
Manual determination and input of the temperature.
The measuring instrument recognizes whether a suitable sensor is connected
and automatically switches on the temperature measurement.
The display of the temperature indicates the active temperature measuring
mode:
If you wish to measure without temperature sensor, proceed as follows:
6.2
ORP calibration
1.
Freeze the measured value with
<AR>
.
The [HOLD] status indicator is displayed.
2.
Release the frozen measured value again with
<AR>
or
<M>
.
The HOLD function is switched off.
The [HOLD] status display disappears.
Temperature
sensor
Resolution of the
temp. display
Temp. measurement
yes
0.1 °C
Automatic with temperature sensor
-
1 °C
Manual
1.
Measure the current temperature of the test sample.
2.
Set the temperature value with
<
><
>
.
or
In the
<ENTER>
/U/
Man. temperature
menu, set the temperature value
with
<
><
>
.
ORP electrodes are not calibrated. You can, however, check ORP
electrodes by measuring the ORP of a test solution and comparing
the value with the nominal value.
