Endress+Hauser micropilot FMR 231 E Sicherheitshinweise Seite 9

Micropilot FMR 231 E
Safety notes for installation in hazardous areas:
1) Install according to the manufacturer's instructions and other valid standards and guidelines.
2) The Micropilot is to be connected to the local equipotential bonding system.
The input circuit is galvanically connected to the housing.
3) The dependency of the permissible ambient temperature of the electronic housing upon the application and temperature
class is given in Tables 1 and 2.
4) If the housing is realigned, check that the locking screw is screwed tight again, see operating manual.
5) Special conditions (X Mark):
The level measurement transmitter Micropilot, type FMR 231 with fully isolated (white) PTFE antenna, has areas of
plastic, on which electrostatic charge can build up. A label warns of this danger:
The special conditions do not apply to Zone 1 applications involving Material Groups IIA and IIB, when the FMR 231
used is of the type:
– Short PTFE antenna (length 390 mm) with metal threaded connection or unclad flange.
– Short PTFE antenna (length 390 mm) with clad flange of nominal diameter ≤ DN 100 (≤ ANSI 4", ≤ 100K).
6) A label must be attached to the terminal compartment: " Do not open in explosive atmospheres when the power is on ".
Safety notes for Zone 0:
7) Potentially explosive vapour/air mixtures may arise under atmospheric conditions only:
If no potentially explosive mixtures are present, or if additional protective measures have been taken, e.g. EN 1127-1,
the transmitters may be operated under other than atmospheric conditions in accordance with the manufacturer's
specifications.
8) The antenna may be employed in those media, for which the wetted parts are known to be suitable.
Only gastight antennas may be used.
9) The construction of the transmitter renders unnecessary any additional overvoltage protection for plants that must be
protected against risk of ignition through lightning in accordance with German National Guidelines TRbF 100 No. 8.
Endress+Hauser
"Avoid electrostatic charging of the antenna"
(e.g. do not rub dry, do not install in filling stream).
–20 °C ≤ T ≤ +60 °C
0.8 bar ≤ p ≤ 1.1 bar
en
XA 017F-A
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