User Manual

2.2 Connecting the Cables

Before measuring voltage and connecting to the BNC jack, be sure to read "2.2.1 Connec-

tion Preparations" (⇒ p. 16).

Connection Preparations

2.2.6 Connecting to the Model 8947 Charge Unit

Input module

Model 8947 Charge Unit

Maximum Input Voltage (⇒ p. 4)

Measurement using a piezoelectric acceleration sensor:

Connect to the BNC jack or miniature receptacle

(according to the particular sensor).

Voltage measurement*

Connect to the BNC jack on an input module.

Model 9198 Connection Cord (recommended)

• Preamplified acceleration sensor *

(BNC connector, 2-mA, 15-V power supply)

• Charge-output type piezoelectric acceleration sensor *

(Miniature #10-32 connector)

*1. A commercially available acceleration

sensor can be used.

*2. For voltage measurement, the connec-

tion procedure is described in "2.2.2

Connecting to an Analog Unit (Models

8936, 8938, 8946, 8956 and 8957)"

(

⇒ p. 17).

• Never connect the cable to the instrument while connected to a measure-

ment object. An electric shock could result.

• The BNC jack for each channel and the miniature receptacles all share

common ground. To avoid short circuits, do not connect to two recepta-

cles at the same time.

• To avoid electric shock or damage to the measurement object, turn the

instrument off while connecting a sensor or probe to the BNC jack.

When the [Preamp] measurement mode is selected, internal power (15 V

@ 2 mA) is applied to the BNC jack when measurement starts.

About preamplified acceleration sensors

The sensor should be compatible with the specification (15 V @ 2 mA) of the

Model 8947 Charge Unit. Incompatible sensors are likely to be damaged.