VEGA VEGADIF 65 Chemical seal CSB - Manual (Page 15)

15
4 Mounting
Chemical seal CSB • for VEGADIF 65
36133-EN-130417
4 Mounting
4.1 Application conditions
Before mounting, setup and operation, take note that the pressure
transmitter as well as the chemical seal were selected according to
measuring range, version and material suitable for the process condi-
tions. The load limits must be maintained in order to guarantee the
specified accuracy.
Caution:
In dangerous substances such as e.g. oxygen, acetylene, combusti-
ble or toxic products as well as in refrigerating plants, compressors,
etc., the pertinent instructions must be observed in addition to the
general regulations.
Take note of the following issues in respect to the process and ambi-
ent temperature:
•
Mount the differential pressure transmitter in such a way that the
permissible process and ambient temperature limits are neither
underrun nor exceeded.
•
Take the influence of convection and heat radiation into account
•
When selecting the chemical seals, make sure that the fittings and
flanges are pressure and temperature resistant
•
For this purpose select the suitable material and pressure stage
•
Mount in such a way that plus and minus side have the same
ambient temperatures to keep the temperature influences low
4.2 Instructions for handling
•
Instruments must be protected against soiling and strong fluctua-
tions of the ambient temperature
•
Leave the measuring system in the packaging until mounting to
protect it against mechanical damages
•
When removing the packaging and when mounting, take special
care to avoid mechanical damage and deformation of the dia-
phragm
•
Do not carry the pressure transmitter by holding the capillary line
•
Do not bent the capillary lines. Kinks can cause leakage and lead
to an increase in response time
•
Never loosen sealed screws on the chemical seal or the pressure
transmitter
•
Do not damage the isolating diaphragm: scratches on the isolating
diaphragm (e.g. from sharp subjects) are the main areas where
corrosion can occur
4.3 Mounting instructions
•
Suitable seals must be selected for sealing
•
For flange mounting, use a seal with a sufficiently large inner diam-
eter and place the seal centrically; contact with the diaphragm will
cause measurement deviations
Suitability for the process
conditions
Process and ambient
temperature
Sealing