Appendix 9 Frequently Asked Questions
A24
What is the file limit when auto
saving to removable storage?
Depending on file size and CF card ca-
pacity, more than 1,000 files can be
sa
ved in one folder, although only 1,000
can be displayed on the file screen. As
the number of files increases, the time
required to start and stop measurement
also increases, so we recommend stor-
ing no more than 1,000 files, if possible.
(When saving, a folder named
"HI
OKI_LR8400" is created, and files
with different data types are saved in
subfolders within it.)
"6.1 About Saving and
Loading Data" (p. 121)
Is data retained in internal memo-
ry when I turn the power off after
me
asuring? I did not use auto
saving to removable storage.
If waveforms are displayed when power
is turned on, the data has been retained.
Data in internal memory is retained for
about
30 minutes after power-off. How-
ever, if power is off for more than 30
minut
es, the data is lost.
To avoid such data loss, we recommend
prepa
ring and making settings for power
outages when measuring for a long
time.
"What happens to data
in a power outage?" (p
.123)
Why is only part of the data saved
when saving to removable stor-
age after measuring?
When A/B cursors are set to specify a
save time span, only data within that
span is saved. Also, internal memory
capacity limits saving of measurement
data to the most recent eight million data
points.
If you need to save more data points,
enabl
e real-time auto saving before-
hand.
"Specifying a Wave-
form Time Span" (p .90)
"Automatic Saving
(Waveform Data and
Numerical Calculation
Results)" (p .125)
After starting measurement with
real-time auto saving, can I still
acquire data if I neglected to in-
sert removable storage media un-
til later?
As long as storage media is inserted be-
fore internal memory overflows, data
fro
m the start of measurement will be
saved to the removable storage.
In the worst case (shortest interval), in-
ternal memory overflows after about two
minut
es.
"Replacing Removable
Storage During Real-
Time Saving" (p .127)
Why does "Saving" continue to
be displayed and saving not fin-
ish when saving internal memory
data as text
after measurement?
To save all data from a full internal
memory to removable media as text af-
ter measurement takes about one hour.
To abort the saving process, press and
hold ST
OP for some time.
We recommend saving binary data, and
lat
er converting to text with the Logger
Utility (which takes only a few seconds).
Logger Utility
Instruction manual
"
7.1.1 Saving Measure-
ment Data as Text"
How to view data saved in binary
format on a PC?
The Logger Utility PC application pro-
gram is included on the supplied CD. In-
stall it on the PC and use it to open the
fil
e.
"10.3 Using the Logger
Utility" (p. 187)
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