Use In Potentially Explosive Atmospheres; Ex-Marking; Temperature Data; Installation - ABB FAM3200 Series Commissioning Instruction

2 Use in potentially explosive
atmospheres
2.1

Ex-marking

ATEX
Type examination certificate
FAM3220 and FAM3225 (device without alarm signalling unit)
II 1/2 G c Tx Ga/Gb
II 2D T115°C Db
FAM3220 and FAM3225 (device with alarm signalling unit)
II 1/2 G c ia IIc T6 Ga/Gb
II 2D T115°C Db
The FAM3250 / FAM3255 models with angular position
transmitters are not approved for use in potentially explosive
atmospheres!
2.2

Temperature data

Maximum permissible ambient temperature
T : -20 ... 60 °C (-4 ... 140 °F)
ambient
Maximum permissible measuring medium temperature
For the maximum measuring medium temperature, refer to the
tables in chapter "Limit value tables" on page 7.
The maximum permissible measuring medium temperature for
dust explosion protection is derived from the possible surface
temperature of the flowmeter.
The higher value must be used.
Change from two to one column
6 CI/FAM3200-EN Rev. B | FAM3200
TÜV 03 ATEX 2151
2.3

Installation

Observe the following points when installing the devices in
potentially explosive atmospheres:
— The alarm signalling units must only be connected to
certified intrinsically safe circuits.
— When using electrical heat tracing, attention must be paid
to potential functional impairment by electromagnetic
fields. The specifications of EN 60079-14 must be
observed.
— Use with zone 0 in the meter tube. Ensure that the
ambient conditions are suitable for devices in zone 1 (e.g.
through ensuring sufficient ventilation).
2.3.1

Electrical connections

B
A
1
+
-
F
Fig. 1: Electrical connection of an alarm signalling unit to a
switching amplifier (example)
A Hazardous area B Non-hazardous area
1 FAM3200 flowmeter with alarm signalling unit
2 NAMUR input switching amplifier 3 Switching amplifier
4 Switching amplifier output 5 Switching amplifier power supply
The circuits (between the alarm signalling units and the
switching amplifier) are intrinsically safe. The switching
amplifier itself must be mounted outside the hazardous area.
2
3
5
4
G11959