592 M1 02 A
07-01-2008
Page 3
OBSERVE THE FOLLOWING INSTALLATION INSTRUCTIONS
1) Adhere to all installation instructions and safety precautions included in the operating instructions.
2) Install in compliance with manufacturer’s instructions and all applicable standards and regulations.
3) May only be used in media to which components which meet the media are resistant.
4) Avoid sparks, which result from friction and impact (secure equipment against oscillation).
5) If the measuring instrument is connected to a category ib intrinsically safe circuit assigned to explosion group IIC or IIB, the type
of protection is changed to the following: EEx ib IIC T6 or EEx ib IIB T6.
6) Sensor capacitance and length-dependent cable capacitance and cable inductance must be taken into consideration when
connecting the intrinsically safe circuit.
7) Use shielded cable only, and earth equipment via the cable shield.
8) The intrinsically safe circuit is earth-free, and is laid out with a dielectric strength of 500 VRMS to earth. If the cable is shortened,
lay out the lead wires and shield such that this dielectric strength value is assured.
9) Avoid electrostatic charging of the sensor cable (e.g. do not rub dry, mount outside of the filling current).
SAFETY PRECAUTION FOR ZONE 0
Devices in potentially explosive vapour-air mixtures may only be operated under atmospheric conditions: -20°C ≤ Ta ≤ +55°C – 0.8 bar ≤ p
≤ 1.1 bar. If no potentially explosive mixtures are present, or if additional measures have been implemented in accordance with EN 1127-1,
these devices may also be operated under other than atmospheric conditions according to the respective manufacturer’s specification.
MAINTENANCE
The MEMPRO Ex C fill-level transmitter is
maintenance-free
if used for its intended purpose.
If used in sticky, adhesive liquids, the measuring tube must be inspected at regular intervals and cleaned if necessary.
Safety Precautions for Electrical Equipment
for Potentially Explosive Atmospheres
Identification in accordance with directive
94/9/EC:
WIRING
Use in Zone 1
Protection Type
Ambient T° Range Electrical Data
II 2 G EEx ia IIC T6
-20°C ≤Ta ≤+70°C
Ui ≤ 30 V DC, Ii ≤ 300 mA, Pi ≤ 1 W
Sensor: Ci ≤ 3 nF, Li = 0
Sensor with connected cable:
Ci ≤ 160 pF/m, Li ≤ 1 μH/m
Use in Zone 0
Protection Type
Ambient T° Range Electrical Data
II 1/2 G EEx ia IIC T6 -20°C ≤Ta ≤+55°C
Ui ≤ 30 V DC, Ii ≤ 300 mA, Pi ≤ 1 W
Sensor: Ci ≤ 3 nF, Li = 0
Sensor with connected cable:
Ci ≤ 160 pF/m, Li ≤ 1 μH/m
