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Installation
Operators instructions
CombiPress, type PFMx
If the transmitter is visibly damaged, it should not be put into
operation.
The pressure diaphragm must not be touched during installa-
tion. Cleaning with high pressure cleaners and tools may dam-
age the diaphragm.
If the transmitter has a G½A connection, check before mount-
ing that the depth of the hole is at least 20 mm.
For correct installation in 3-A connections please see page 2.
Mounting the pressure transmitter in a closed system (e.g. a
valve) may create overpressure higher than permitted, which
can deform and damage the diaphragm.
Measuring ranges and over pressure safety
The freezing point of the filling liquid must not be exceeded
White oil
-5°C
Silicone oil -40°C
The maximum temperature for the filling liquid is 200°C.
Though the maximum temperature is limited by the mechanical
construction for standard connection to 125°C.
During CIP the temperature may reach 150°C for max. 1 hour.
Cell range, bar 0...0,345 -1...1 -1...5 -1...20 -1...34 -1...68 -1...400
Over pressure
1
3
15
60
70
135
690
Burst pressure
2
6
30
120
170
270
1.350
The pressure transmitter can change zero point slightly, owing to
mechanical tension and the fitting direction selected for the pres-
sure diaphragm. Optimal results are therefore achieved if the
zero point is adjusted after the pressure transmitter has been
mounted in place in the application.
Front cover and front ring
Note: Don’t use tools to tighten the front cover/ring. The front
cover/ring is only to be tightened by hand.
Electrical installation
Suitable cables should be used to secure maximum tightness in
the gland. For models having a plug for electrical connection the
inner part of the plug must be oriented in a way so that the open-
ing is turning downwards.
To avoid measuring errors resulting from insufficient supply volt-
age, the transmitter must be supplied with min. 10 VDC at 23
mA. When mounted with DFON display the minimum voltage will
be 14,5 or 16,5 VDC, depending on the setting of the back-
ground light.
The transmitter has a high immunity against high-frequency in-
terference. In environments with a high radiation it is recom-
mended to use screened and twisted cable.
Accuracy, turn down
The specifications for accuracy apply to full scale (FS). at 20°C
However the below results are tested and will under normal con-
ditions apply
Accuracy:
0,10%/FS
@
20°C will apply for up to 2:1 turn down
0,25%/FS
@
20°C will apply for up to 4:1 turn down
Installation procedure
a) Remove protection cap.
b) Install CombiPress™ in the application
c) Connect the power supply
d) If needed, configure span by the touch screen, FlexPro-
grammer or a HART configurator.
e) If needed, configure the 0-point (4 mA) by pressing the
0-botton for about 5 second (slow blinking diode in app.
5 sec after which the diode will blink fast and the 0-point is
set) or use the facility in the FlexProgrammer or the HART
configurator.
The electronic zero point can be adjusted from -10...10% of the
measuring range.
The correct zero point pressure must be established prior to
adjusting the zero point. Tank and pressure transmitter must
have the same temperature. If the pressure transmitter has a
relative measuring cell from 0 bar, the zero point pressure is the
same as the atmospheric pressure or the level in a tank select-
ed as zero point level. A pressure transmitter measuring abso-
lute pressure has a zero point lower than 1 mbar abs.
You can revert to the factory set zero point correction by recon-
figuring the CombiPress™ with the FlexProgrammer and select-
ing factory setting.
Page 4 / 32
English
Operating Instructions: 11120948 03
