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3.1
Mechanical Installation
Use gaskets, if required, that are suitable for the process connection and resistant to the
media.
Before starting operation, check the process connection carefully for leaks under pressure.
Install safety pressure gauges in the line with DIN EN 837-1 S1 and S3 so that the exhaust
equipment can freely discharge to the rear in the event of a fault or malfunction. Provide
for corresponding openings if mounting the unit on the wall.
Use the spanner flats to screw in the device.
Measuring devices where oil or grease residues in the measuring element are not permit-
ted are marked on the scale with the oil can
icon.
Measuring devices for use with oxygen are marked on the scale with the oil can
icon
and the word "oxygen" directly below this.
Seal cylindrical screw threads by fitting a sealing washer to the front face of the gasket.
Seal taper screw threads by screwing tight; typically a gasket material is applied to the
male thread. Make sure that the set of gasket you use are correct and in perfect condition
when mounting the instrument; non-matching gasket can cause faults.
Vent the pressure gauge after installation using the vent
valve (Figure 1).
The devices are supplied with a closed vent valve
(CLOSED position). Moving the red lever to the OPEN
Figure 1: Vent valve
position equalises the pressure level inside and outside
the case (Figure 2).
Figure 2: Move valve
No activity is necessary prior to commis-
sioning with ventilation systems positioned
in the front glass, like for type series
BH8xxx (Figure 3). Avoid contaminating the
vent element.
Figure 3: Vent element in the front glass
BA_008_2019-11_10.01 Pressure gauges
Page 3/5
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