Datalogger Mode; Automatic Datalogging - Extech Instruments SDL900 User Manual

Datalogger Mode
Preparation for the Datalogger Function
Insert the SD card into the SD card socket. If the SD card has never been used with the SDL900,
please format it (see the section titled "SD Memory Card Format" in the Set Mode above).
Note: It is strongly recommended that memory cards be formatted by the SDL900. If the SD card
has problems use a computer to reformat the SD card and try again.
If this is the first time the meter is being used, set the Date and Time (see the section "Set the
Clock Time and Date" in the Set Mode above).
Automatic Datalogging
1. Select the sampling time (rate) as described in the Set Mode section above to a value
other than zero.
2. Press and hold the LOG button for 2 seconds. The meter will flash the DATALOGGER icon
at the selected sampling rate, indicating that readings are now being automatically
recorded to the SD card.
3. If a card is not inserted or if the card is defective, the meter will display 'EMPTY' and exit
the DATALOGGER mode. In this case, switch the meter OFF and try again with a valid SD
card.
4. Pause the datalogger by pressing the LOG button momentarily. The DATALOGGER icon
will stop flashing and the sample rate will display for a short time. To resume logging
simply press the LOG button again.
5. To terminate the datalogging session press and hold the LOG button for at least 2
seconds.
6. When an SD card is used for the first time a folder is created on the card and named
MGA01. Up to 99 spreadsheet documents (each with 30,000 readings) can be stored in
this folder.
7. When datalogging begins, a new spreadsheet document named MGA01001.xls is created
on the SD card in the MGA01 folder. The data recorded will be placed in the
MGA01001.xls document until 30,000 readings are reached.
8. If the measurement session exceeds 30,000 readings, a new document will be created
(MGA01002.xls) where another 30,000 readings can be stored. This method continues
for up to 99 documents, after which another folder is created (MGA02) where another 99
spreadsheet documents can be stored. This process continues in this same fashion with
folders MGA03 through MGA10 (last allowable folder).
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