WIKA DPGS43HP.160 - Manual (Page 6)

6
Temperature Class of the
ambient atmosphere
(ignition temperature)
Maximum permissible medium temperature
(in the pressure system)
T 6 (85 °C < T ≤ 100 °C) +70 °C
T 5 (100 °C < T ≤ 135 °C) +85 °C
T 4 (135 °C < T ≤ 00 °C) +100 or +10 °C
1)
T 3 (00 °C < T ≤ 300 °C) +100 or +185 °C
1)
T (300 °C < T ≤ 450 °C) +100 or +00 °C
1)
T 1 (T > 450 °C) +100 or +00 °C
1)
080
50 07/
009 GB/D/F
GB
WIKA Operating instructions pressure gauges Model 7 with 831 per ATEX
Operating Temperature
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 explosive atmosphere. Both aspects must be taken
into account.
For maximum permissible medium temperatures see Table .
Attention! In the case of gaseous substances, the temperature may increase
due to compression warming. In these cases it may be necessary to throttle
the rate of change of pressure or reduce the permissible temperature of the
pressure medium.
Table : Permissible medium temperature
1) The higher values only apply to special versions with higher permissible media temperatures.
Installation
Nominal position per EN 837-3 / 9.6.6 Figure 7: 90° ( ⊥ )
Process connection: lower mount (LM)
In order to ensure that with Model 73X.31 pressure can be safely and reliably
vented through the case back, a distance of at least 5 mm must be left free
behind the case!
In order to avoid any additional heating, the instruments must not be
exposed to direct solar irradiation while in operation!
With filled versions the vent valve on the top of the casing must be opened
prior to commissioning!
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3. Technical data and intended use