B00-100
• B1 • 09/22 • GB • p. 12 of 20 • www.armano-messtechnik.com
Operating Instructions Pressure Gauges
Selection Criteria, Measuring Arrangements, Installation and Operation Manual
Indication check:
If a check of the indication during operation is neces-
sary, the pressure gauge is separated from the process
via the required shut-off device with test connection
(
chapter 5 “Additional Accessory”) and pressurised
with test pressure. The error limits according to DIN
EN 837-1 and DIN EN 837-3 apply.
Temperature resistance:
The permissible operating temperatures of
the pressure gauge must not be exceeded.
The temperature resistance or the permissible oper-
ating temperature generally is between max. −40 °C to
+60 °C (
DIN EN 837-1 and DIN EN 837-3), whereas
unfilled gauges with brazed Bourdon tube can with-
stand medium temperatures up to +100 °C and stainless
steel cases with shielded arc welding Bourdon tube can
withstand medium temperatures up to +200 °C.
Special versions with corresponding dial inscription
(t
A
/ t
R
) might be suitable for higher temperatures.
Please note: these are only specifications
concerning the temperature resistance of
the materials as well as the soldered joints
or weld seams. The specifications concern-
ing indication errors due to deviations from
the reference temperature are to be regard-
ed! Detailed information can be found in
our model overview 1000 for Bourdon tube
pressure gauges.
Cleaning temperature:
During rinsing of the measuring line, the
permissible operating temperature of the
pressure gauge (see above) must not be
exceeded.
If necessary, the device needs to be shut-off or re-
moved. For pressure gauges with attached chemical
seals, the maximum cleaning temperature t
R
must not
be exceeded.
9.
Electrical Accessories
The mounting and the electrical connection shall be
carried out by qualified personnel only.
Instruments with electrical accessories are marked
with a nameplate, which indicates how the electric
connection has to be carried out.
It is necessary to regard the load limits. Exceeding the
load limits might cause damage.
The national and international safety regulations (e.g.
VDE 0100) have to be regarded during installation,
commissioning and operation of the instruments.
It must be ensured that the cable diameters match the
nominal widths of the sealing inserts. Screw fittings
must be tightened firmly. Only then compliance with
certified degrees of protection can be ensured. In
versions with angular plug, plug connector or termi-
nal box, the centrally arranged fixing screws must be
tightened hand-tight.
For the connection of pressure transmitters DMU,
only shielded cable has to be used to ensure electro-
magnetic compatibility (EMC). The shield has to be
connected to the case or the ground terminal of the
angular plug.
Please regard that the CE mark according to the EMC
directive for instruments with magnetic contact only
applies, when the frequency of operation does not ex-
ceed 5 switching cycles per minute.
If specified, suitable switch amplifiers or multifunc-
tional relays have to be used (e.g. for instruments with
inductive contact). The valid operating requirements
have to be regarded.