Operating Manual PR 9268/60, PR 9268/70
Hints for mounting and installation
Seite 13
5.
HINTS FOR MOUNTING AND INSTALLATION
Caution:
Do not subject the transducer to hard shocks and do not drop it.
This could lead to internal damages and thus to impairment or loss of sensi-
tivity.
The transducers are to mount on flat and clean surfaces. The mounting screws have to be
tightened firmly to prevent vibration of the transducer housing.
The Harting-connectors of the
PR 9268/60
and
/70
transducers contain a resistor network.
The connector may only be mounted in environments with temperatures not higher than
100°C. The connector must not be opened.
It is recommended to use the attached screws M6x20 with washers and spring washers of
stainless steel.
Install the cable without torsion and elongation and protect it against damage. Fix the metal
protection hose as closely as possible to the transducer by using a clamp.
Connect pin 5 of the Harting plug only to protective earth if the transducer housing is
mounted without earth-connection.
The metal protection hose is insulated against cable screen and transducer
housing.
6.
MAINTENANCE, REPAIR AND HINTS FOR FAULT FINDING
During operation the vibration transducers
PR 9268
do not require any maintenance. High-
quality materials and, as far as permitted considering the required sensitivity, a robust con-
struction ensures an trouble free operation and a long service life even in hostile environ-
ments.
If, despite of it, a problem occurs, the following tests permit a first fault analysis:
Resistance measurement pins 2 - 3:
3270
Ω
Insulation resistance of coil connections
against screen and housing:
>
1 M
Ω
, test voltage max. 500V d.c.
Connect an AC-millivoltmeter to the coil connections and shake the transducer gently in
measuring direction. Now, a voltage of up to approx. 1 V a.c. can be generated.
Due to the sealed housing, the high-temperature transducers
PR 9268/60
and
/70
cannot be
repaired. In case of a defect, they have to be replaced.
In case of defects to the housing, protection hose, cable and/or connector the transducer
must be shut down and replaced immediately.
Sensors, that are operated in hazardous areas, may only be re-
paired in the factory, otherwise the permission for the operation ac-
cording to the test certificate lapses.
i
i
