When Using the Charge Converter
Connect the charge output type acceleration sensor to a charge converter using a
highly isolated low-noise cable. By driving the charge converter using a constant
current from the SL1000, voltage signals similar to those of the built-in amplifier
type acceleration sensor can be obtained. The SL1000 measures the signals in the
acceleration measurement mode and supplies bias current to the charge converter.
Set the input sensitivity of the SL1000 according to the charge converter gain and the
sensitivity of the charge output type acceleration sensor.
The SL1000 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
Highly
insulated
low-noise
cable
Charge converter
701275 (ACCL/VOLT)
(acceleration measurement)
SL1000
Note
The unit of measurement of acceleration on the SL1000 is m/s
2
. The sensitivity is sometimes
expressed in units of mV/G depending on the acceleration sensor. In such cases, convert the
unit. (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 OFF. 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
ON/OFF setting of the bias current is retained even when you turn OFF the SL1000.
3-38
IM 720120-01E
3.10 Connecting Acceleration Sensors