SlimLine 9173B, Instruction Manual

Page: 16 / 44

SlimLine Force Sensor, Type 9173B to 9177B
Page 14 9173B_002-286e-07.10
4.4 Basic Circuit and Cabling of Measuring Chain
When the applied compression force changes the quartz force
link yields an electric charge. The charge amplifier converts
the charge signal into a proportional output voltage that can
be detected and recorded with an electronic evaluation sys-
tem.
4.4.1 Notes on Cabling of Measuring Chain
Piezoelectric sensors may only be connected to or discon-
nected from a charge amplifier with the latter in the <Re-
set> mode. When in the <Operate> or <Measure> modes
the input stage of the charge amplifier can be destroyed by
voltage peaks!

Only high-insulation, low-capacitance coaxial cables
that only generate a very small amount of triboelectric-
ity when moved may be used as connecting cable for
piezoelectric sensors. We exclusively recommend the
connecting cables listed on data sheet 1631C_000-346.

Before connection we recommend cleaning both connec-
tors of the connecting cable with the cleaning spray Type
1003 from Kistler or with white spirit. The connector is
sealed against the force link sensor with an O-ring. In the
case of some cables this ring is enclosed separately and has
to be inserted into the connector before connection. The
bearing surfaces for the O-ring must be clean.

To prevent the connector contacts getting dirty, do not
remove the protective caps of the connections until just
before connecting the cable.

Route the connecting cable so that when work is being
carried out it is free to move as necessary, but cannot
be pulled out or severed.

The vibration of the connecting cable can generate
electric charge and superimpose noise on the charge
signal (triboelectric effect).

Several sensors can be connected in parallel to add the
charge and the measurands. Only one charge amplifier
is needed.

Conventional cables can be used to connect displays or
evaluation units to the charge amplifier.