FISCHER MA15F ... A Series, Руководство по эксплуатации

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3 | Assembly FISCHER Mess- und Regeltechnik GmbH
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3.4.2 Differential pressure transmitter with magnetic spring contacts
MA15 … 1B
II 2G Ex h IIC T4 Gb
Simple electric operating equipment acc. to EN60079-11 sec: 5.7 in explosive
areas Zone 1 and 2.
Contact element: KE ## M ## 0B4H2
Allowed temperatures:
• The maximum surface temperature 95 °C was determined under the follow-
ing conditions without dust accumulation and safety factor.
• Allowed ambient temperature: -20°C to +60°C.
• Allowed medium temperature in the differential measurement unit < 85°C.
WARNING
Compression heat
With gaseous mediums, the instrument temperature can increase due to com-
pression heat. In such cases, the pressure change speed must be limited or re-
duced to the allow measuring substance temperature.
NOTICE! For a differential pressure change between 10% and 90% of the
measuring range and a pulse frequency < 0.06 Hz, the temperature in-
crease is <10K.
To avoid additional heating, the instruments may not be exposed to direct sun-
light during operation!
The standards EN60079-0, EN ISO 80079-36 and EN ISO 80079-37 apply for
the non-electrical part of the devices in terms of explosion protection. The ap-
plicable requirements of these standards are satisfied.
As a simple electrical operating unit, the installed electrical switch contacts fulfil
the requirements of the standard EN60079-14 Par. 3.5.2. The devices are not
labelled with respect to the electrical part.
The documents for the mechanical part were filed with notified office NB0044
(TÜV-Nord-Cert) under the file number 8000389448.
Intrinsically safe power circuits
For use in areas at risk of explosion, instruments must be connected to certified,
intrinsically safe electricity circuits.
Max. voltage U
max
30 V
Max. current I
max
200 mA
Max. power P
max
800 mW
Max. inner capacity C
i max
60 pF
Max. inner inductivity L
i max
4 µH
Recommend circuit breakers see accessories