R9EWTU
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: +81(6)6659-8201 Fax: +81(6)6659-8510 E-mail: [email protected]
EM-6224 Rev.9 P. 20 / 21
DATA LOGGING IN SD CARD
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GENERAL DESCRIPTION
The R9EWTU is equipped with a SD card slot.
The unit transfers to the card at 0 minute every hour its in-
ternal memory data: energy per hour; and voltage, current,
power and energy per minute.
A 4-GB SD card can store information of 8 channels for ap-
prox. 16 years.
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TIMING
Data recording is started from 0 minute of the hour when
the card is inserted.
For example, if it is inserted at 9:50, data from 9:00 to 10:00
is transferred to the card at 10:00, and later data is added
every hour until the card is extracted. (If the unit has been
started later than 9:00, data before the startup is not avail-
able.)
If the card is not in the unit on the hour, data transfer is not
executed and the internal data is automatically erased until
one is inserted to the unit again.
The SDCard LED starts blinking 30 seconds before the
hour every hour for noticing start of writing operation.
DO NOT extract the card while the LED is blinking until
the writing is complete.
If the card is extracted or the power supply to the unit is
turned off while it is writing, stored data may be destroyed
and inaccessible.
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SD CARD
Prepare one of the following types of memory card:
• Manufacturer: Hagiwara Solutions
Model: NSD6-004GH(A00SDI (discontinued),
NSDA-004GT (discontinued),
NSDA-004GL (discontinued),
NSD6-004GH(B21SEI
• Manufacturer: Apacer Technology
Model: AP-ISD04GIS4B-T, AP-ISD04GIS4B-3T
M-SYSTEM IS NOT LIABLE FOR ANY LOSS OF DATA.
Data may be lost in but not limited to the following cases:
• Wrong handling of the card
• Static or electric noise interference
• When the card is extracted or when the power supply to
the unit is turned off while it is accessed.
• When formatting SD card, use a dedicated software “SD
Card Formatter”.
“SD Card Formatter” is downloadable at SD Association’s
web site.
https://www.sdcard.org
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CALENDAR
The incorporated calendar IC is backed up with a battery
which enables the calendar backup for 2 years with no ex-
ternal power supply.
We recommend that the power supply is maintained as long
as possible while the SD card is used.
The battery does not wear while the external power is sup-
plied, however, the calendar cannot be backed up after the
total elapsed time without power supply exceeds 2 years.
The unit indicates a calendar error with POWER LED, and
resets the date and time to Year 2000, January 1, 00:00:00.
Refer to “COMPONENT IDENTIFICATION” section. Set
the date and time again in such a case.
Once the backup battery life is expired, the unit indicates
the same error every time the power supply to it is turned
on.
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DIRECTORY
XXXXXXXX
Device
201004
201004.csv
201005
Month
Month
20100401.csv
20100430.csv
Log file, 1 hour interval
Log file, 1 minute interval
Log file, 1 minute interval
・
・
・
• Device Folder
A data folder inherent to the device is automatically cre-
ated, and monthly folders are created in it.
Device folder is identified with the device’s serial number
(8 characters).
• Monthly Folder
Monthly folders are identified with year (4 characters) and
month (2 characters). All log files for the designated month
are stored in it.
