VWR International MU 6100 H, Instruction Manual

Page: 39 / 96

MU 6100 H ORP voltage
ba77077e02 09/2014
39
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.
7.1.2 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.
 Measurement by an external temperature sensor.
 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:
7.2 ORP calibration
1. Freeze the measured value with <HOLD> .
The [HOLD] status indicator is displayed.
2. Release the frozen measured value again with <HOLD> or <MODE> .
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
<OK> /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.