Metrel MD 9040 Digital-Multimeter, DMM, 20991440 Hoja De Datos

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MD 9040 & MD 9050 Digital multimeter 
Operation 
 
4 Operation 
 
CAUTION 
Before and after hazardous voltage measurements, test the voltage function on a 
known source such as line voltage to determine proper meter functioning. 
 
 
 
AutoCheck
TM
 (for MD9050 only) 
This innovative AutoCheck
TM
 feature automatically selects measurement function of 
DCV, ACV or Resistance (
) based on the input via the test leads. 
  With no input, the meter displays “Auto” when it is ready. 
  With no voltage signal but a resistance below 60M is present, the meter displays 
the resistance value. When below “Audible Threshold“ is present, the meter further 
gives a continuity beep tone. 
  When a signal above the threshold of 1.5V DC or 3V AC up to the rated 1000V is 
present, the meter displays the voltage value in appropriate DC or AC, whichever 
larger in peak magnitude. 
 
Note: 
*Range-Lock and Function-Lock Feature:
 When a measurement reading is being 
displayed in AutoCheck
TM
 mode, press the RANGE  or  SELECT button momentarily 1 
time can lock the range or function it was in. Press the button momentarily repeatedly to 
step through the ranges or functions. 
*As Hazardous-Alert:
 When making resistance measurements in AutoCheck
TM
 mode, 
an unexpected display of voltage readings alerts you that the object under test is being 
energized.