User Manual

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2.4 Connection of the Input Unit

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.4.5 8947 CHARGE UNIT

WARNIN

・Never connect the connection cable to the unit while it is connected to the

measurement object, to avoid electric shock.

・The BNC connectors for each channel and the miniature connection terminals share a

common ground. Do not connect both types of terminals at the same time.

・When the PREAMP measurement mode is selected, voltage (15 V at 2 mA) is applied

internally to the BNC connector when measurement starts. To avoid electric shock and

damage to measurement objects, select a measurement mode other than PREAMP or

turn the unit off when connecting a sensor or probe to the BNC terminals.

・Before using an Internal Preamp Type Acceleration Sensor, be sure that it conforms to

the 8947 specifications (15 V at 2 mA). Using a non-conforming sensor could result in

damage to the sensor.

■Connecting an Internal Preamp Type

Acceleration Sensor (PREAMP and VOLTAGE

modes)

Use a cable with BNC connector to connect the

pickup sensor to the unit in PREAMP mode. We

recommend the Model 9198 CONNECTION CORD

for the VOLTAGE mode.

(1) Push the BNC plug onto the connector on the

unit, and turn it clockwise until it locks.

(2) To remove the BNC plug, push the plug ring

and turn it counterclockwise to release the lock

then pull it out.

Acceleration sensors compatible with the 8947 CHARGE UNIT are as follows:

・Acceleration sensors with internal preamp (BNC connector with 15 V at 2

mA operating power)

・Charge-output type accelerator sensors (miniature 10-32 connection

terminal)