Heinrichs Messtechnik GmbH
Page 12 of 31
Ex-Supplement operating manual
UMC4 with TM/TMU/TME/TMR/TM-SH
4.4
EC Type-Examination Certificate for the sensors
The sensors, TM, TMU, TME, TMR und TM-SH are approved with the examination certificates;
DMT 01 ATEX E 149 X
II 1/2G Ex ia IIC T6-T2 Ga/Gb
IECEx BVS 11.0084 X
Ex ia IIC T6-T2 Ga/Gb
for the use in potentially explosive atmospheres. (hazardous classified locations)
The sensor may be used in such a way that inside the measuring tubes explosive atmosphere may be present
often or for a long time (Zone 0).
Warning
In order to comply with the requirements for explosive atmospheres, it is essential that
the maximum electrical and thermal values set forth below are observed.
4.4.1
Sensor Parameters
Exciter circuit (terminals 9 and 10)
For type EC1
Voltage
Ui
30 V
Current
Ii
90 mA
Power
Pi
0,4 W
Effective internal capacitance
Ci
negligible
Effective internal inductance
Li
4,38 mH
For exciter circuit type EC2 (remote mount transmitter configuration)
For connecting an intrinsically safe circuit with the Ex ia IIC type of protection, with linear output
characteristic and the following maximum values:
Voltage
Uo
30 V
Current
Io
90 mA
Power
Po
0.8 W
Sensor circuits (terminals 1
–
2 and 3 - 4)
Voltage
Ui DC
30 V
Current
Ii
50 mA
Power
Pi
0,3 W
Effective internal capacitance
Ci
negligible
Effective internal inductance
Li
14 mH
Output voltage
Uo
AC 0,3 V
