Hioki MEMORY HiLOGGER LR8450 User Manual

111
Measurement Data
If communicates with a wireless module are disrupted
Each wireless module is internally equipped with the bu󰀨er memory.
If a wireless module cannot communicate with the instrument, which causes a data transmission
error, the module will temporarily save the data in its bu󰀨er memory.
When communications are restored, the module will resend the data for recovery.
• When a recording interval of between 1 ms and 5 ms is set
The system will recover data retained in each module one by one.
• When the recording interval is set to 10 ms
The system will recover data retained in multiple modules at once.
The wireless module can retain data with a length of about ve minutes in the backup
memory. According to the number of modules that need to be recovered, outage duration, and
communication environments, the system may not process the recovery fast enough, causing the
data to include NO DATA points.
• The system can recover data with a length of up to 230 Mwords, 90% of the instrument’s internal
bu󰀨er memory. When the setting allows the internal bu󰀨er memory to save data with a length of
10 minutes, the system can restore data acquired for the last nine minutes.
• When the auto-save is enabled, the recovery process varies according to the save form.
See “Auto save (real-time save)” (p. 142)
When data has been save in the binary form (.MEM), the system will also recover data being
saved upon completion of data recovery. However, the system cannot recover les that have
already been saved after segmented. When data has been save in the text form, the system will
save only the recovery data in les under the new name with the characters [_R] added to the
end of the auto-save lename. If the media has been replaced with another, the system cannot
recover retained data because the media currently inserted contains no data to be recovered.
• If a wireless module is turned o󰀨 during measurement, the data acquired before the shutdown will
be discarded.
• If the instrument is turned o󰀨 during measurement, the system cannot recover the data retained
in the wireless modules.
Measured data acquired during communications disruption
The instrument will draw the horizontal lines along the screen upper end for the parts of waveforms
that cannot be acquired from wireless modules (regarded as NO DATA).
A modules’ icon with the red frame indicates that the module retains measurement data regarded
as NO DATA.
See “Screen and icons” in the Quick Start Manual.
The instrument will halt waveform drawing during communications disruption and the data recovery
process in progress.
The instrument will display the string [NO DATA] for gure displays and cursor values.
See “Waveform display and data handling during communications disruption” (p. 409).
Settings and Operation
HIOKI LR8450A964-03
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Hioki MEMORY HiLOGGER LR8450 Specifications

General

Brand	Hioki
Model	MEMORY HiLOGGER LR8450
Category	Data Loggers
Language	English