When using the charge converter
Connect a charge-output-type acceleration sensor to the charge converter using a high-insulation,
low-noise cable. By driving the charge converter using a constant current from the DL850/DL850V,
voltage signals similar to those of the built-in amplifier type acceleration sensor can be obtained.
The DL850/DL850V measures the signals in the acceleration measurement mode and supplies
bias current to the charge converter. Set the input sensitivity of the DL850/DL850V according to the
charge converter gain and the sensitivity of the charge output type acceleration sensor.
The DL850/DL850V only supports charge converters that are driven by constant current with driving
current of 4 mA and driving voltage of 22 V.
Charge-output-type
acceleration sensor
Normal coaxial
cable
High-insulation,
low-noise cable
Charge
converter
701275(ACCL/VOLT)
(acceleration measurement)
DL850/DL850V
Note
The unit of measu
r
ement of acceleration on the DL850/DL850V is m/s
2
. If the sensitivity is indicated in mV/G
for the acceleration sensor that you are using, convert it to m/s
2
. (1 G = 9.81 m/s
2
)
Precautions
• Do not apply shock outside the specifications (see the manual for the acceleration sensor) to the
acceleration sensors. Doing so can damage the sensors.
• Do not impose drastic temperature changes on the acceleration sensors.
Temperature changes
may affect the output value of the acceleration sensors.
•
By default, the bias current on the acceleration sensors is turned of
f. Be sure to turn it on before
using the acceleration sensors. Bias current is valid only when measuring acceleration. When
measuring other parameters, it is automatically turned off. The bias current on/off setting is saved
when the DL850/DL850V is turned off.
3.11 Connecting an Acceleration Sensor
3-31
IM DL850-03EN
Making Preparations for Measurements
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