Vega VEGABAR 87 Operating Instructions Manual page 13

Vibrations
Permissible process
pressure (MWP) - Device
Permissible process
pressure (MWP) - Mount-
ing accessory
Temperature limits
VEGABAR 87 • 4 ... 20 mA
Warning:
The housing or the electrical connection may not be used for screw-
ing in! Depending on the device version, tightening can cause dam-
age, e. g. to the rotation mechanism of the housing.
If there is strong vibration at the mounting location, the instrument
version with external housing should be used. See chapter "External
housing".
The permissible process pressure range is specified on the type label
with "MWP" (Maximum Working Pressure), see chapter "Configura-
tion". This applies even if a measuring cell with a measuring range
(order-related) higher than the permissible pressure range of the
process fitting is installed.
In addition, a temperature derating of the process fitting, e. g. with
flanges, can limit the permissible process pressure range according
to the respective standard.
The permissible process pressure range is stated on the type label.
The instrument should only be operated with these pressures if the
mounting accessory used also fulfils these values. This should be en-
sured by suitable flanges, welded sockets, tension rings with Clamp
connections, sealings, etc.
Higher process temperatures often mean also higher ambient
temperatures. Make sure that the upper temperature limits stated in
chapter "Technical data" for the environment of the electronics hous-
ing and connection cable are not exceeded.
Fig. 5: Temperature ranges
1 Process temperature
2 Ambient temperature
2
1
4 Mounting
13