Display Backlight; Data Storage; Clearing Memory - Extech Instruments EX542 User Manual

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DISPLAY BACKLIGHT

Press the
key to turn the backlight on. The backlight will automatically turn off after SET time.
Press the EXIT button to exit the backlight on mode.
HOLD
The hold function freezes the reading in the display. Press the HOLD key momentarily to activate or
to exit the HOLD function.
PEAK HOLD
The Peak Hold function captures the peak AC or DC voltage or current. The meter can capture
negative or positive peaks as fast as 1 millisecond in duration.
Set the rotary dial to your preferred setting. Press and Hold the HOLD button for 3 seconds and
release. Now momentarily press the HOLD button, "PEAK" will appear along with "MAX" that will
display in left auxiliary display and MIN" will display in right auxiliary display. Momentarily press the
HOLD button again and "PEAK Hold" will appear. The meter will update the display each time a
higher or lower peak occurs. Press the EXIT button to exit the PEAK mode. Auto Power Off feature
will be disabled automatically in this mode.

DATA STORAGE

1.
Set the function switch to the measurement function desired.
2.
Press the STORE button to enter the STORE function. The left upper aux display indicates the
current storage location (0000 to 9999). New measurements will begin storing into the next
location.
3.
Press the PEAKHOLD button to change into the initial storage number 0000. (Press it again to
change back). On the right upper aux display shows XXXX which states how many current
storage locations are used.
4.
Press STORE button again to enter into recording interval time set up function.
5.
The left upper aux display indicates 0000 S, which is the recording sample rate; use the + & -
buttons to select the sample rate desired (0 to 255 sec)
6.
Set the sample rate to 0000 S for manual recording. In this mode, each press of the STORE
button will save one measurement reading.
7.
Set the sample rate to 1 to 255 S for automatic recording. In this mode, pressing the STORE
button will start data recording at the set sample rate.
8.
Press the EXIT button to end the recording session.
DATA STORAGE RECALL
1.
Press STORE button for two seconds to enter into RECALL function.
2.
On the left upper aux display will show XXXX, which is the current storage location. The right
aux display will show XXXX, which is the number of storage locations currently used.
3.
Press the + or — button to select the storage location. The value in that location will be
indicated in the main display.
4.
Press the PEAKHOLD button once to continuously scan data from 0000 to XXXX. Press again
then scan again.
5.
Press the EXIT button to end the recall session.

CLEARING MEMORY

To clear the memory of all stored data, from the OFF position, hold the EXIT button and switch the
function switch to any position. Release the EXIT button and the LCD will flash 3 times and a buzzer
will beep three times. Memory is now clear.
11
EX542-en-GB_v1.5 06/15

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