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MD 9040 & MD 9050 Digital multimeter Operation
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PC computer interface capabilities
The instrument equips with an optical isolated interface port at the meter back for data
communication. Optional purchase PC USB interface kit AMD9050 is required to
connect the meter to the PC computer.
MAX/MIN/AVG* (REC) at fast 20/s measurement mode
Press REC button momentarily to activate MAX/MIN/AVG* recording mode. The LCD
“R” & “MAX MIN AVG*” turn on, and the reading update rate will be increased to
20/second. The meter beeps when new MAX (maximum) or MIN (minimum) reading is
updated. AVG* (Average) reading is calculated over time. Press the button momentarily
to read the MAX, MIN, MAX-MIN and AVG* readings in sequence. Press the button for
1 second or more to exit MAX/MIN/AVG* recording mode. Auto-ranging remains, and
Auto-Power-Off is disabled automatically in this mode.
1ms CREST capture mode (MD9050 only)
Press CREST button momentarily to activate CREST (Instantaneous Peak-Hold) mode
to capture voltage or current signal duration as short as 1ms. 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 , MIN, and MAX-MIN (Vp-p) readings in
sequence. Press the button for 1 second or more to exit CREST mode. Auto-ranging
(up range) remains, and Auto-Power-Off is disabled automatically in this mode.
Backlighted display (MD9050 only)
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.
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.
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/AVG* readings. Press the 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 function.
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