Cerabar M, Deltabar M, Deltapilot M Installation
Endress+Hauser 23
4.5.7 PMP51, version prepared for diaphragm seal mount –
welding recommendation
Endress+Hauser recommends welding on the diaphragm seal as follows for the "XSJ -
prepared for diaphragm seal mount" version in feature 110 "Process connection" in the order
code up to, and including, 40 bar (600 psi) sensors: the total welding depth of the fillet weld
is 1 mm (0.04 in) with an outer diameter of 16 mm (0.63 in). Welding is performed
according to the WIG method.
Information on filling
The diaphragm seal must be filled as soon as it has been welded on.
• After welded into the process connection, the sensor assembly must be properly filled with
a filling oil and sealed gas-tight with a sealing ball and lock screw.
Once the diaphragm seal has been filled, at the zero point the device display should not
exceed 10% of the full scale value of the cell measuring range. The internal pressure of the
diaphragm seal must be corrected accordingly.
• Adjustment / calibration:
– The device is operational once it has been fully assembled.
– Perform a reset. The device must then be calibrated to the process measuring range as
described in the Operating Instructions.
A0028495
Fig. 15: Version XSJ: prepared for diaphragm seal mount
1 Hole for fill fluid
2Bearing
3Setscrew
A1 See the "Welding recommendation" table below
Engineering unit mm (in)
A1
ø7.95 (0.31)
ø2.5 (0.1)
5 (0.2)
12 3
Consecutive seam
no.
Sketch/welding groove shape,
dimension as per DIN 8551
Base material matching Welding method
DIN EN ISO 24063
Welding
position
Inert gas,
additives
A1
for sensors
40 bar (600 psi)
A0024811
Adapter made of AISI 316L
(1.4435) to be welded to
diaphragm seal made of
AISI 316L (1.4435 or 1.4404)
141 PB Inert gas
Ar/H 95/5
Additive:
ER 316L Si
(1.4430)
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