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8. Addition for the GFM 700 F-EEx ATEX and GFM 700 HT EEx-ATEX
8.1 Safety instructions
This product is designed for use in accordance with EN IEC 61010-1 for Installation
Category 2 and Pollution Degree 2. Hazardous voltages are present within this product
during normal operation. The product is designed for Protection Class I and should
never be operated without protective earthing. The product shall also never be
operated with covers removed unless equivalent protection of the operator and its
environment from accidental contact with hazardous internal voltages is provided.
Always follow basic and local safety precautions when using this product to reduce
risk of injury from electrical shock, spread of fire or other dangerous situations.
WARNING !
No changes may be made to the devices. Unauthorized changes might affect the explosion
safety of the devices.
These additional instructions are an extension to the standard Installation and Operating
Instructions and only applies for the EEx version of the GFM 700 F gas flowmeter. All technical
information described in the standard Installation and Operating Instructions are applicable,
when not specifically excluded or replaced by the instructions in these additional instructions.
Be sure to follow these instructions !
8.2 SYSTEM COMPONENTS
8.2.1 General information
The Altosonic gas flowmeter system GFM 700 F-EEx consists of the ultrasonic gas flow sensor GFS 700 F-EEx
or GFS 700 F/HT-EEx (high-temperature version) in combination with the ultrasonic gas flow converter GFC 700
F-EEx. Both the sensor and the converter can be installed in a hazardous location of Zone 1 or 2. The schematic
block diagram of the gas flowmeter system is given in Figure 1 (see Section 4
Connection diagram
for details).
Figure 1: Schematic block diagram of the GFM 700 F-EEx gas flowmeter.
Important
The prescriptions and regulations as well as the electrical data described in the EG certificate of
conformity must be obeyed.
Beside the instructions for electrical installations in non-hazardous locations according to the applicable
National standard (equivalent to IEC 364, i.e. VDE 0100) especially the regulations in EN 60079-14
“Electrical installations in hazardous locations” or equivalent national standard (e.g. DIN VDE 0165) must
be followed.
Installation, establishment, utilization and maintenance are only allowed to be executed by personnel
with an education in explosion safety.
GFS 700 F-EEx
or
GFS 700 F/HT-EEx
gas flow sensor
MR04 connecting cable
GFC 700 F-EEx
gas flow converter
Equipotential bonding
Hazardous locations of Zone 1 or 2
Power
supply
Signal
outputs
Summary of Contents for GFM 700 F
Page 31: ...31 9 ATEX approvals 9 1 GFC 700 F EEx Signal converter...
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Page 34: ...34 9 2 GFS 700 F EEx Primary head flowmeter...
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