digi-tech QM-1549 Use and care manual

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

product name:
product model:
working procedure:
Calibration Operation Instruction
1、adjust ACA0
Set tap position in AC10A，adjust potentiometer VR1,let LCD display
0.000-0.001A
2，Check datum mark:
Set tap position in ACV，input 100mV(60Hz) by use standard ACV current
source ,let LCD display 0.999V～1.001V
Test indication:
PICTURE INSTRUCTION OPERATION STEPS
Digital Multimeter
QM-1549
ACV
ACA0 potentiometer VR4
ACV adjust potentiometer
VR2
Measuring range Calibrating spot Normal display range(50-400HZ)
400mV 0mV 0.0-4.9mV(hand movement range）
400mV 100mV 99.2-100.8mV(hand movement range）
400mV 100mV 0.095-0.105V(automatic range）
4V 1V 0.988～1.012V
40V 10.00V 9.88～10.12V
400V 100.0V 99.4～101.6V
600V 600V 587～613V
square wave.triangular wave,amplitude limiting wave test
Measuring range Calibrating spot Normal display range(50-400HZ)
40V 35.00V 35.40～34.60V