Operation
32
Bourdon tube, capsule, diaphragm, spring diaphragm pressure gauges
8
Operation
1.
Slightly tap on the housing of the pressure gauge.
2.
Read the pressure.
The error limits as per EN 837-1/-3 apply.
3.
When cleaning or flushing the pressure line, you must not ex-
ceed the maximum permissible operating temperature of the
pressure gauge. If necessary, shut off the pressure gauge or
dismount it (see chapter 8.1, page 32).
4.
In order to check the zero point of the pressure gauge during
operation, close the required shut-off unit (see chapter 9.1,
page 33) so no pressure is applied to the pressure gauge.
The pointer must be in the tolerance range indicated by a bar at
the zero point.
5.
In order to check the indication of the pressure gauge during
operation, disconnect it from the process by means of the re-
quired shut-off unit with test connection (see chapter 9.1,
page 33) and apply test pressure.
8.1
Dismounting the pressure gauge
CAUTION
Hazard to persons, equipment and the environment due to es-
caping residue of the fluid
Take appropriate protective measures against escaping residue
of the fluid prior to disconnecting the pressure gauge.
1.
Unpressurise the measuring element.
2.
Unpressurise the measuring line, if necessary.
3.
Dismount the pressure gauge.
