GRAPHTEC miid LOGGER GL860 User Manual page 98

2-1. Sampling interval
This is used to set the sampling interval for data capture.
The table below shows the number of measuring channels*
If data fluctuate due to noise, set the sampling interval to a value that enables the digital filter function.
Number of Measuring
Channels*
1
1CH
2CH
3 to 4CH
5CH
6 to 10CH
11 to 20CH
21 to 40CH
41 to 50CH
51 to 100CH
101 to 200CH
*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
5ms
10ms
20ms ～
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.
1 and sampling interval values that can be set.
Allowed Sampling Interval
5ms or slower *
2
10ms or slower *
2
20ms or slower *
2
50ms or slower * 2
50ms or slower *
2
100ms or slower
200ms or slower
250ms or slower
500ms or slower
1s or slower
Number of configurable calculation channels
Up to 5CH
Up to 10CH
Up to 20CH
3-42
Chapter 3 Settings and Measurement
Sampling Interval which enables
Digital Filter *
3
50ms or slower
125ms or slower
250ms or slower
250ms or slower
500ms or slower
1s or slower
2s or slower
2s or slower
5s or slower
10s or slower