Metrel MD 9060 Digital-Multimeter, DMM, 20991940 Ficha De Dados

9 

 
CAUTION 
Before and after hazardous voltage measurements, test the voltage function on a 
known source such as line voltage to determine proper meter functioning. 
 
VFD ACV 

Press the SELECT  button momentarily to toggle between the  subject functions. Last 
selection will be saved as power up default for repeat measurement convenience. By 
default, voltage is always set at manual-range 500V to best cope with most Variable 
Frequency Drives (VFD) measurements. Press the RANGE  button momentarily to 
select other ranges only when needed. High noise-rejection frequency measurement 
algorithm and Low-pass filter circuit are permanently bundled with all the voltage and 
frequency function-ranges within this rotary-switch position.  
 

Note: Hz Input sensitivity varies automatically with voltage (current function alike) range 
selected. 5V range has the highest and the 1000V range has the lowest. This VFD 
function defaults at the most appropriate trigger level for Variable Frequency Drive 
measurements. You can also press the RANGE button momentarily to select another 
trigger level (voltage range) manually. If the Hz reading becomes unstable, select higher 
voltage range to avoid electrical noise. If the reading shows zero, select lower voltage 
range for better sensitivity. 
 
dBm 

Press the SELECT button momentarily to select the subject functions in sequence. Last