Metrel MD 9250 Digital-Multimeter, DMM, 20991937 Hoja De Datos

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20991937
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MD 9250 Clamp Meter Series 
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
 mode 
This innovative AutoCheck
TM
 feature automatically selects measurement function of 
ACV
 Hz
, DCV, or Resistance (
) based on the input via test leads. 
 
 
 
  ●With no input, the meter displays “Auto” when it is ready. 
  ●With no voltage signal but a resistance below 10M (nominal) is present, the meter 
displays the resistance value. When the resistance is below the “Audible Threshold”, 
the meter further gives a continuity beep tone. 
  ●When a signal above the voltage threshold of 1.5V DC or AC up to the rated 1000V 
is present, the meter displays the voltage value in appropriate DCV or ACV, 
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.