Special Conditions For Safe Use (X Conditions); Maximum Permissible Medium Temperature (In The Measuring System) - WIKA DPG40 Bedienungsanleitung

4. Special conditions for safe (X conditions)

4. Special conditions for safe use (X conditions)

For the differential pressure gauge, the specifications in combination with the information
on aggressive/corrosive media as well as the information on the avoidance of mechanical
hazards must be observed.
1) For ambient temperature, temperature class and maximum surface temperature the
following applies:
- Permissible ambient temperature range: -10 ... +60 °C
- For the permissible medium temperature range see the following table:
Temperature class
Gas application
T6
T5
T4
- When mounting the pressure gauge it must be ensured that, taking into considera-
tion the influence of convection and heat radiation, no deviation above or below the
permissible ambient and medium temperature ranges can occur. The influence of
temperature on the indication accuracy must be observed.
2) The instruments must be connected to the equipotential bonding of the plant. Do not
use any electrically insulating sealing tape.
3) Electrostatic charges must be avoided. Therefore, only clean the instruments with a
moist cloth.
4) During the commissioning process pressure surges must be avoided at all costs. Open
the shut-off valves slowly.
5) Avoid using media which might react with the materials used and can cause a sponta-
neous self-ignition.
WIKA additional information Ex c for model DPG40
Temperature class
Dust application
≤ 85 °C
≤ 100 °C
≤ 135 °C
Maximum permissible me-
dium temperature (in the
measuring system)
65 °C
80 °C
90 °C
EN
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