Connecting The Sensors - HBM CMD Serie Bedienungsanleitung

Starting up
44
8.2.1

Connecting the sensors

One sensor can be connected to the CMD charge ampli­
fier. If required, you can use the CSB4/1 summing box to
connect up to four sensors in parallel operation.
Please note the following when making the connection:
S Due to the very high insulation of the charge amplifier
input, the signal or charge input must be protected
against contamination. Insulation is reduced by mois­
ture and contamination; this can lead to increased drift
and invalid measurement results.
Clean the plug connection as required with a clean,
lint‐free paper towel or cleaning pad (e.g. HBM order­
ing number 1-8402.0026) and pure isopropanol (e.g.
IPA200 from RS Components). Also refer to Section
14.3, "Information about the charge amplifier and elec­
trical connection", on page 68.
S Use the connection cable included among the items
supplied, if possible. Once fitted, it should stay con­
nected at the transducer. We otherwise recommend
using high‐insulation, low‐noise cables from the HBM
range (1-KAB143-3). These have been tested for high
insulation resistance, low noise and small interference
charges during movement.
S Where possible, short‐circuit the sensor before con­
nection as piezoelectric sensors can generate high
voltages. These could damage the charge amplifier.
S Connect the sensor cable to the transducer connec­
tion socket of the CMD. Comply with the maximum
tightening torque of 1.5 Nm for the 10‐32 UNF socket.
S To connect the sensor to the BNC socket of the
CMD600 or CMD2000 with cable 1­KAB143­3, you
also need sensor adapter 1­CON­P3001, or cable
1­KAB176­X with a BNC socket.
A2781-3.1 HBM: public
CMD