MR MESSKO MT-ST Compact User Manual

5 Installation and commissioning
72 BA5831400-00 EN
5. Remove the measuring device.
6. Put the bridge back in terminals and and tighten the lock screws.
Since you are not working with the actual heating current dur-
ing this setting process, we recommend a second calibration
before commissioning.
Temperature gradient calibration before commissioning:
Example:
Displayed temperature without current source: 40°C
Nominal secondary transformer current: 1.9A
Required gradient: 26K
Temperature display after gradient adjustment: 40°C
+ 26K = 66°C
ü The thermometer is mounted on the transformer.
1. Note the temperature currently shown on the thermometer (e.g. 40°C).
2. If a constant temperature cannot be ensured, we recommend taking the
temperature sensor out of the thermometer pocket and placing it in a ther-
mometer calibration bath. Set the calibration bath to a temperature of
40°C, for this example.
3. Connect a current source to terminals and of the thermometer. Set
the nominal secondary transformer current specified by the transformer
manufacturer (e.g. 1.9A) on the current source.
4. Wait until the temperature display stops changing (approx. 15minutes).
5. Compare the temperature display to the previously calculated value (in
this example, 40°C + 26K = 66°C).
6. If the required temperature value is not reached on the thermometer dis-
play, use the adjustment screw of the potentiometer to readjust (take the
heating and cooling time of approx. 15minutes into account).
7. If the displayed temperature remains at the required value constantly over
a period of 30minutes, the calibration is complete.
8. Reinstall the temperature sensor in the thermometer pocket.

MR MESSKO MT-ST Compact Specifications

General

Brand	MR
Model	MESSKO MT-ST Compact
Category	Thermometer
Language	English