Extech Instruments SDL350 User Manual page 5

System Reset
If the meter's keys become inoperable or if the display freezes, the Reset button can be used to
reset the instrument.
1. Use a paper clip or similar item to momentarily press the reset button located on the lower right
side of the instrument under the snap-off compartment cover.
2. After pressing the Reset button, switch the instrument ON by pressing and holding the
POWER key for at least 1.5 seconds. If using the power adaptor unplug the adaptor and then
plug it in again to power the meter.
AC Power Adaptor
This meter is normally powered by six (6) 1.5V 'AA' batteries. However, an optional AC 9V power
adaptor is available. To use the adaptor, insert the power adaptor plug into the jack on the bottom
right side of the meter (under the snap-off compartment cover); plug the other end of the adaptor
into an AC power source. The meter will now be permanently powered (as long as the adaptor is
used) and the power key will be disabled.
Datalogger
Types of Data Recording

Manual Datalogging: Manually log up to 99 readings onto an SD card via push-key press.

Automatic Datalogging: Automatically log data onto an SD memory card where the number of
data points is limited only by the card size. Readings are logged at a rate specified by the user.
SD Card Information

Insert an SD card (from 1G size up to 16G) into the SD card slot at the bottom of the meter.
With regard to orientation, the card should be inserted with the front of the card (label side)
facing toward the rear of the meter.

If the SD card is being used for the first time it is recommended that the card be formatted and
the logger's clock set to allow for accurate date/time stamping during datalogging sessions.
Refer to the Setup Mode section for SD card formatting and time/date setting instructions.

European and USA numerical formats differ. The data on the SD card can be formatted for
either format. The meter defaults to USA mode where a decimal point is used to separate units
from tenths, i.e. 20.00. The European format uses a comma, i.e. 20,00. To change this setting,
refer to the Setup Mode section.
Manual Datalogging
In the manual mode the user presses the LOG key to manually log a reading onto the SD card.
1. Set the sampling rate to '0' seconds.
2. Press and hold the LOG key for at least 1.5 seconds; the lower portion of the display will show
p-n (n = memory position number 1-99).
3. Press the LOG key momentarily to log a reading into memory. The REC icon will flash each
time a data point is stored (the SCAN SD icon will appear when the meter accesses the card).
4. Use the ▲ and ▼ keys to select one of the 99 data memory positions in which to record.
5. To exit the manual datalogging mode, press and hold the LOG key for at least 1.5 seconds.
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