wtw pH/Cond 3320 - Measuring the Temperature; ORP Calibration

pH/Cond 3320 ORP voltage
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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.