HBM PACEline CMD600 Manuel D'emploi page 41

CMD600
In order to achieve a lower drift, please note the following information:
1. Note running-in behavior of the charge amplifier:
The charge amplifier should run in at least a hour before measurements
start.
2. Ensure connections are clean
If the insulation resistance of the cable between sensor and charge
amplifier is too low, the measurement chain will drift as charge will
discharge via the too low insulation resistance.
In order to keep piezoelectric measurement chain drift low, all plugs and
sockets must be kept clean at all times. Under no circumstances touch
open contact surfaces with the fingers or allow oil on them as this can
reduce the required insulation resistance.
We also recommend that protective caps should be left on the sockets of the
sensors and charge amplifiers until the sensor or charge amplifier is
connected. When the connections are disconnected, the protective caps
should be screwed back on again.
Piezoelectric sensors must be connected to the charge amplifier via a
high-quality coaxial cable, HBM offers the cable 1−KAB143−3 for this case.
Such a cable cannot be repaired, it must be replaced if damaged.
If the measurement chain is always operated with a connected cable and the
sensors always stored with protective caps, then contaminated contact
surfaces will not be a problem.
If however, despite all care, sockets are contaminated, they can be cleaned
as follows:
• First of all, unscrew the plug
• Dry wipe the white surface of the socket with a cleaning pad (e.g. HBM
Order number 1−8402.0026)
• Spray the socket with pure isopropanol (e.g.: IPA200 from RS
Components)
• Clean again with a new cleaning pad
The cable plugs cannot be cleaned, i.e. if the cable is contaminated, it must
be replaced.
A2781−2.1 en/de/fr
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