Metrel MD 9030 Digital-Multimeter, DMM, 20991441 Hoja De Datos

10 

CAUTION 
When measuring a 3-phase system, special attention should be taken to the phase-to-
phase voltage which is significantly higher than the phase-to-earth voltage. To avoid 
exceeding the voltage rating of the protection fuse(s) accidentally, always consider the 
phase-to-phase voltage as the working voltage for the protection fuse(s). 
 
Beep-Jack™ Input Warning 
The meter beeps to warn the user against possible damage to the meter due to 
improper connections to the 

A, mA, or A input jacks when other function (like voltage 

function) is selected. 
 
Temperature function 
Be sure to insert the banana plug type-K temperature bead probe AMD9023 (Optional 

purchase) with correct 

 polarities. Defaults at degree C (Celsius). Press SELECT 

button momentarily to select degree F (Fahrenheit). You can also use a plug adapter 
AMD 9024 (Optional purchase) with banana pins to type-K socket to adapt other type-K 
standard mini plug temperature probes. 
 

 

 

Relative zero 

 mode allows the user to offset the meter consecutive measurements 

with the displaying reading as the reference value. The display will now show readings 
relative to the stored reference value. That is, display = reading - stored value. Press 
the 

 button momentarily to activate or to exit relative zero mode.