WIKA 700.02 - Manual (Page 6)

6
11025859.03 10/2013 GB/D/F/E
GB
WIKA operating instructions differential pressure gauge with piston per ATEX
2. Safety
Skilled personnel
Skilled personnel are understood to be personnel who, based on their technical
training, knowledge of measurement and control technology and on their
experience and knowledge of country-specific regulations, current standards
and directives, are capable of carrying out the work described and independently
recognising potential hazards.
Temperature class of the
ambient explosive atmosphere
(ignition temperature)
Maximum permissible medium
temperature (in the measuring
system)
T 6 (> 85 °C) +70 °C
T 5 (> 100 °C) +85 °C
all other temperature classes +100 °C
2.3 Safety instructions for differential pressure gauges per ATEX
WARNING!
Non-observance of these instructions and their contents may
result in the loss of explosion protection.
WARNING!
It is imperative that the application conditions and safety
requirements of the EC declaration of conformity are followed.
Differential pressure gauges must be grounded via the process
connection!
Specifications
Permissible temperatures
Ambient: 0 … +60 °C
Medium: The permissible medium temperature does not only depend on
the instrument design, but also on the ignition temperature of the
surrounding gases, vapours or dust. Both aspects have to be taken into
account. For permissible maximum medium temperatures see table 1.
Attention! With gaseous substances, the temperature may increase as a result
of compression warming. In these cases it may be necessary to throttle the rate
of change of pressure or reduce the permissible medium temperature.
Table 1: Permissible medium temperature