User Manual - P series
7
www.georgin.com
1.8. Mounting the housing
(see Chapter IV.1)
Georgin recommends mounting the housing in accordance with the following rules:
a. For bellows or Bourdon tube pressure switches and temperature switches:
The orientation of the housing has little effect on the operation of the instrument, but an upright (vertical)
position is nevertheless recommended (with adjustment screw facing upwards). This prevents premature wear
and preserves the measurement characteristics.
b. For diaphragm pressure switches:
Diaphragm instruments (except PA type) MUST be mounted vertically (with adjustment screw facing upwards),
with the diaphragm horizontal, on an appropriate mount.
Because of the weight and/or the shape of the sensing element, the housing of these instruments must NEVER
be used as a mount.
1.9. Installation
(see Section IV.2)
The instruments are mounted according to type. Refer to the specific dimensional drawings.
For pressure switches, if the pressure connection uses a rigid tube, ensure that this tube is aligned with the axis
of the fitting so that the housing, and the measuring element in particular, are not subject to any mechanical
loads that could deform them or shift the threshold.
2. Special recommendations
2.1. ATEX devices
For ATEX devices, it is ESSENTIAL to refer to the “ATEX Instruction Manual“ supplied with the equipment and available
on www.georgin.com.
2.2. Low- and medium-pressure instruments
Diaphragm-actuated instruments (except PA type) must be installed with the diaphragm horizontal and secured to a
special mount.
Ask us for further information.
2.3. Differential pressure switches
To ensure that the contact(s) will change state, the pressure in the HP chamber must be greater than that in the LP
chamber. This difference must be greater than the sum of differential pressure (∆P) + microswitch dead band
HP – LP > ∆P + e
Type
Scale ∆P
Adjustable dead band ≤
Max.
dead
band ≥
Max. P
static
1x SPDT
2x SPDT
96
106
bar
bar
bar
bar
bar
B
H
B
H
Min / Max
DPB.QX11
0.5 to 1.5
1.2
1.8
2
2.5 / 33
Example: For a DPB.QX11 in function 96, the pressure in the HP chamber must be greater than the pressure in
the LP chamber by at least:
P. HP – P. BP > 0.5 + 1.2 bar
P. HP – P. BP > 1.7 bar
