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Elma BM 251-252-255-257
side 44
5ms CREST capture mode
Press CREST button momentarily to activate CREST (Instantaneous Peak-Hold) mode to
capture voltage or current signal duration as short as 5ms. The LCD “C” & “MAX” turn on.
The meter beeps when new MAX (maximum) or MIN (minimum) reading is updated. Press
the button momentarily to read the MAX and MIN readings in sequence. Press the button
for 1 second or more to exit CREST capture mode. Auto-ranging and Auto-Power-Off are
disabled automatically in this mode.
Backlighted LCD display
Press the SELECT button for 1 second or more to toggle the LCD backlight. The backlight
will also be turned off automatically after 32 seconds to extend battery life.
Hold
The hold feature freezes the display for later view. Press the HOLD button momentarily to
toggle the hold feature.
Relative Zero mode
Relative zero allows the user to offset the meter consecutive measurements with the
displaying reading as the reference value. Practically all displaying readings can be set as
relative reference value including MAX/MIN feature readings. Press the REL button
momentarily to toggle relative zero mode.
Manual or Auto-ranging
Press the RANGE button momentarily to select manual-ranging, and the meter will remain
in the range it was in, the LCD turns off. Press the button momentarily again to
step through the ranges. Press and hold the button for 1 second or more to resume auto-
ranging.
Note: Manual ranging feature is not available in Hz and functions.
Set Beeper Off
Press the RANGE button while turning the meter on to temporarily disable the Beeper
feature. Turn the rotary switch OFF and then back on to resume.
Beep-Jack™ Input Warning
The meter beeps as well as displays “InEr” to warn the user against possible damage to
the meter due to improper connections to the µA, mA, or A input jacks when other function
(like voltage function) is selected.
Auto-Power-Off (APO)
The Auto-Power-Off (APO) mode turns the meter off automatically to extend battery life
after approximately 34 minutes of no rotary switch or push button operations. To wake up
the meter from APO, press the SELECT, CREST or REC button momentarily or turn the
rotary switch OFF and then back on. Always turn the rotary
switch to the OFF position
when the meter is not in use
44


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