Heinrichs Messtechnik GmbH
EX-Supplementary Operating Manual
HPC Mass Flow Meter
Page 11 of 20
4.4
EC Type-Examination
The sensors are certified with the following examination certificates:
ATEX
CML 19ATEX2096X
Standard Version
High Temperature Version
II 1G Ex ia IIC T4 Ga
II 1D Ex ia IIIC T135°C Da
or
II 1G Ex ia IIC T4 Ga
II 1D Ex ia IIIC T135°C Da
II 2D Ex ia IIIC T190°C/T240°C Db
IECEx
IECEx CML 19.0025 X
Standard Version
High Temperature Version
Ex ia IIC T4 Ga
Ex ia IIIC T135°C Da
Or
Ex ia IIC T4 Ga
Ex ia IIIC T135°C Da
Ex ia IIIC T190°C/T240°C Db
and are approved for the use in potentially explosive atmospheres. (hazardous classified locations)
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 (Pins 9 and 10)
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
Sensor circuits (Pins 1 – 2 and 3 – 4)
Voltage
Ui
DC 30 V
Current
Ii
25 mA
Power
Pi
0.130 W
Effective internal capacitance
Ci
negligible
Effective internal inductance
Li
50 mH
Output voltage
Uo
AC 0.3 V
Temperature sensor circuits (Pins 5 to 8)
