MR MESSKO MT-ST Compact RM - Page 67

5 Installation and commissioning
67BA5831400-00 EN
1. Write down the temperature currently displayed (e.g. 30°C).
2. Connect a constant current source to terminals and .
Figure50: Connecting the current source
3. Set the nominal secondary transformer current I
w
(e.g. 2A) on the current
source.
Determining the heating current
ü The value of the temperature gradient is specified by the transformer
manufacturer (e.g. gr=20K).
1. Read the associated value for the heating current from the setting curve
(desired value, 1.1A in this example).
2. Determine the voltage at terminals and using a high-impedance
voltmeter.
ð The numerical value of the measured voltage in V corresponds to the
numerical value of the heating current in A.