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product name:

product model:

working procedure:

PICTURE INSTRUCTION

OPERATION STEPS

Debugging indication:           
   Check datum mark:input DC100mV,check and tune 
potentiometer VR1 
   Debugging step:set tap position in DCV,input 100.0mV 
by use standard DCV current source,check and tune 
potentiometer VR1,make display range of LCD is 
99.9mV~100.1mV 
Test indication:
   

Digital Multimeter

QM-1549

DCV

Calibration Operation Instruction

adjust DCV potentiometer 
VR1

Measuring range  Calibrating spot  Normal display 
range

                                                  

400mV     0mV      0.0~0.1mV   
400mV    100.0mV   99.5~100.5mV  
4V       1.000V    0.990~1.010V  
40V      10.00V    9.90~10.10V  
400V     100.0V    99.0~101V  
1000V     600V     593~607V

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