10
VA Master FAM540
METAL CONE VARIABLE AREA FLOWMETER | OI/FAM540-EN REV. E
… 2 Use in potentially explosive atmospheres in accordance with ATEX and IECEx
Installation instructions
The installation, commissioning, maintenance and repair of
devices in areas with explosion hazard must only be carried out
by appropriately trained personnel.
The safety instructions for electrical apparatus in potentially
explosive areas must be complied with, in accordance with
Directive 2014/34/EU (ATEX) and IEC60079-14 (Installation of
electrical equipment in potentially explosive areas).
To ensure safe operation, the requirements of EU Directive
ATEX 118a (minimum requirements concerning the protection of
workers) must be met.
When using in potentially explosive atmospheres, please note:
• Observe the information in
Installation conditions
on
page 38 when installing the device.
• The maximum ambient temperature for use with
combustible dusts (category II 2D) is T
amb
= +60 °C.
• During commissioning, refer to EN 60079-0 regarding use in
areas with combustible dust.
• For explosion-protected apparatus with PTFE liner, a
minimum medium conductivity of > 10-
8
S/m must be
guaranteed.
• If Zone 0 is present in the meter tube, the devices may only
be installed in an environment that provides sufficient
ventilation to guarantee Zone 1.
• Variable area flowmeters used in accordance with maximum
electric values for a category 3 device (zone 2) can also be
retrofitted without modification as category 2 devices in
zone 1 (see
Changing the type of protection
on page 20).
Protection against electrostatic discharges
DANGER
Risk of explosion!
The painted surface of the device can store electrostatic
charges.
As a result, the housing can form an ignition source due to
electrostatic discharges in the following conditions:
• The device is operated in environments with a relative
humidity of
≤
30 %.
• The painted surface of the device is thereby relatively free
from impurities such as dirt, dust or oil.
• Instructions on avoiding ignition in potentially explosive
environments due to electrostatic discharges in
accordance with PD CLC/TR 60079-32-1 and IEC TS 60079-
32-1 must be complied with!
Instructions on cleaning
The painted surface of the device must be cleaned only using a
moist cloth.
Sensor insulation
The device may be insulated. The maximum permissible
thickness of the insulation corresponds to the flange diameter.
Refer to
Sensor insulation
on page 23.
