YOKOGAWA SL1400 - After a Power Failure

App-17
IM 701240-01E
3
2
1
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
App
App
Index
Appendix
Appendix 8 Waveform Acquisition Operation When
the Power Supply Recovers after a
Power Failure
The waveform acquisition operation when the power supply recovers after a power
failure varies depending on the following two conditions.
• Start Mode (Power On)
Whether to start the waveform acquisition at power on.
• Acquisition memory backup switch
Whether to back up the acquisition memory
When Start Mode (Power On) is OFF
•When the backup switch is OFF
The history memory is cleared.
Waveform acquisition does not start regardless of whether measurement was in
progress before the power failure.
•When the Backup Switch Is ON
The history memory is held.
If waveform acquisition was in progress before the power failure, the waveform
acquisition is resumed.*
Waveform acquisition does not start if measurement was stopped before the power
failure.
Note
The behavior when the backup switch is ON but the batteries go flat while backing up the data is
as follows:
• The history memory is cleared.
• Waveform acquisition does not start regardless of whether measurement was in progress
before the power failure.
When Start Mode (Power On) is ON
•When the Backup Switch Is OFF
The history memory is cleared.
Waveform acquisition starts regardless of whether measurement was in progress
before the power failure.
•When the Backup Switch Is ON
The history memory is held.
If waveform acquisition was in progress before the power failure, the waveform
acquisition is resumed.* Waveform acquisition starts if measurement was stopped
before the power failure.
Note
The behavior when the backup switch is ON but the batteries go flat while backing up the data is
as follows:
• The history memory is cleared.
• Waveform acquisition starts regardless of whether measurement was in progress before the
power failure.
*•If the acquisition mode is set to average or if realtime recording is in progress, the
waveform acquisition is restarted. If a power failure occurs during realtime recording, the
realtime recording file becomes an invalid file (this file cannot be loaded). Be sure that the
power supply is not interrupted during realtime recording.
• Acquisition of waveforms continues during roll mode display. If the display is not in roll
mode, pre-trigger data is acquired from the beginning for pre-triggered waveforms. The
data of post-trigger waveform up to the power failure is considered valid, and the acquisition
of waveforms continues from that point.