3-42
Chapter 3 Settings and Measurement
Contents General Description
Checks and Preparation
Settings and Measurement
Example of Use Specification
2-1. Sampling interval
This is used to set the sampling interval for data capture.
The table below shows the number of measuring channels*
1
and sampling interval values that can be set.
If data fluctuate due to noise, set the sampling interval to a value that enables the digital filter function.
Number of Measuring
Channels*
1
Allowed Sampling Interval
Sampling Interval which enables
Digital Filter *
3
1CH
5ms or slower
*
2
50ms or slower
2CH
10ms or slower
*
2
125ms or slower
3 to 4CH
20ms or slower
*
2
250ms or slower
5CH
50ms or slower
*
2
250ms or slower
6 to 10CH
50ms or slower
*
2
500ms or slower
11 to 20CH
100ms or slower 1s or slower
21 to 40CH
200ms or slower 2s or slower
41 to 50CH
250ms or slower 2s or slower
51 to 100CH
500ms or slower 5s or slower
101 to 200CH
1s or slower 10s or slower
*1: The number of measurement channels is the number of channels whose input settings for the standard screw terminal, Withstand
high-voltage high-precision terminal, or screwless terminal are set to anything other than OFF.
*2: When the temperature setting is performed in 5, 10, 20 and 50 ms sampling intervals, the data capture cannot be performed.
*3: Depending on the recording environment, it may take a long time to write files during recording.
If writing takes a long time, reduce the number of channels or adjust the sampling interval.
•
When using the digital filter, the AC power frequency to be used must be set accurately.
Refer to “6-3-2. AC Line cycle” described later to set it correctly.
•
The number of calculation channels that can be turned ON is limited by the sampling interval.
Sampling Number of configurable calculation channels
5ms Up to 5CH
10ms Up to 10CH
20ms
～
Up to 20CH
2-2. External sampling
This is used to enable disable or disable external sampling.
When the external sampling function is enabled, data is captured at the shortest intervals and retained temporarily.
This retained data is updated at the shortest intervals.
On receiving an external sampling pulse, the retained data is written to the internal memory or SD memory card.
(See the following figure.)
Therefore, the maximum error in time between the actually captured data and the external sampling pulse is the same
as the shortest interval.
For the fastest interval, refer to "2-3. AC line filter" below.
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