User Manual

3.10 About Setting Contents
71
Example: Measuring frequency dropping to 0 Hz, and then increasing
The pull-up resistance function is used when connecting to an open-collector
output signal.
The input terminal is pulled up to +5 V.
Set Pull-Up to Off for normal measurements.
Actual Phenomena
Frequency drops from a certain cycle to 0 Hz, and then
increases from that point.
Hold: 10-ms Off
At frequencies below 100 Hz, the displayed value is suc
-
cessively halved to 0 Hz.
However, until the frequency reaches 100 Hz again, the
halved signal is now added.
Hold: On
The previous value is retained until the 0-Hz event.
Hold: 1-s Off
At frequencies below 1 Hz, the displayed value is succes
-
sively halved to 0 Hz.
However, until the frequency reaches 1 Hz again, the
halved signal is now added.
200
100
0
[Hz]
2
1
0
[Hz]
3.10.11 Pull-Up Setting
Setting Item: [Pull-Up]
Selections Description
Off Pull-up resistance is disable (Off).
On
Pull-up resistance is enabled. (for connection to open-collector out-
put)