User Manual

3.5 Model 8940 F/V Unit Settings

Select the probe attenuation

[Probe]

Select according to the cable or probe being used

(

⇒ p. 75).

[ 1:1, 10:1, 100:1, 1000:1(9322+9325) or 1000:1(9322+9418) ]

Set the threshold level

[Threshold]

Set the threshold value (⇒ p. 72).

Set pull-up

[Pull-Up]

Enable (set On) the pull-up resistance when connecting to an

open-collector output signal. Disable it (Off) for normal mea-

surements (

⇒ p. 71).

[ Off or On ]

Set the Hold function

[Hold]

Select whether to hold the last measured value until the next

frequency or rotation rate is determined (

⇒ p. 70).

[ On, 10-ms Off or 1-s Off ]

Set up scaling

Set as occasion demands.

See

"5.4 Converting Input Values (Scaling Function)" in the

Instruction Manual

Difference between frequency measurement and 50/60 Hz frequency

measurement

The frequency measurement function consists of selecting a range from 50 mHz

to 5 kHz and observing changes in frequency.

The 50/60 Hz frequency measurement function consists of setting either 50 or

60 Hz as the zero position, and observing deviations from that frequency.