YOKOGAWA DL350 - Page 85

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IM DL350-03EN
2.16 Connecting an Acceleration Sensor
Connecting Acceleration Sensors
When Connecting Built-in Amplifier Type Acceleration Sensors
This instrument allows built-in amplifier type (low impedance) acceleration sensors to be directly
connected. To connect built-in amplifier type acceleration sensors, use BNC cables. Use cables that
are appropriate for the acceleration sensors being used.
Connect the acceleration sensors with the bias current turned off. After connection, turn on the supply
current to the acceleration sensors for making measurements.
When Connecting Charge Output Type Acceleration Sensors
Since the charge output type (high impedance) acceleration sensors do not have built-in amplifier
circuit, they cannot be directly connected to this instrument. Use either of the following two methods to
connect the sensors.
Using the Charge Amplifier
Connect a charge-output-type acceleration sensor to the charge amplifier using a high-insulation,
low-noise cable. The acceleration signal (charge signal) that has been converted to a voltage signal
by the charge amplifier is input to the instrument using a normal coaxial cable. The instrument
measures the signal in the voltage measurement mode. The measured data can be converted to
acceleration values using the scale conversion function of the instrument.
701275 (ACCL/VOLT)
(voltage measurement)
Charge-output-type
acceleration sensor
Normal coaxial
cable
High-insulation,
low-noise cable
Charge amp
DL350
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 instrument,
voltage signals similar to those of the built-in amplifier type acceleration sensor can be obtained.
This instrument measures the signals in the acceleration measurement mode and supplies bias
current to the charge converter. Set the input sensitivity of the instrument according to the charge
converter gain and the sensitivity of the charge output type acceleration sensor.
This instrument 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
High-insulation,
low-noise cable
Charge
converter
701275 (ACCL/VOLT)
(voltage measurement)
Normal coaxial
cable
DL350
Note
The unit of measurement of acceleration on the instrument is m/s
2
. If the sensitivity is indicated in mV/G for
the acceleration sensor that you are using, convert it. (1 G = 9.81 m/s
2
)