24
ELECTRICIAN’S MULTIMETER
•
According to the crest factor, the additional error is calculated as follows:
a. Add 4% when crest factor is 1-2
b. Add 6% when crest factor is 2-2.5
c. Add 8% when crest factor is 2.5-3
•
AC voltage frequency measurement: 45Hz-1kHz. Min measurement amplitude: 10% of
voltage range.
•
Accuracy guarantee range: 1-100% of range, shorted circuit allows least significant digit <10
•
Max input voltage: 1000V rms
•
Input voltage >1000V: audio/visual alarm
•
Input voltage >1010V: “OL” appears on LCD
RESISTANCE MEASUREMENT
RANGE
RESOLUTION
ACCURACY
600Ω
0.1Ω
± ( 0 . 8%+5)
6kΩ
0.001kΩ
± (0 8%+3)
60kΩ
0.01kΩ
600kΩ
0.1kΩ
6MΩ
0.001MΩ
± (1. 5%+5)
60MΩ
0.01MΩ
±(1 5%+ 25 )
!
Measurement result = reading of resistance – reading of shorted test leads
• Open circuit voltage: *about 1V (test current is about 0.4mA)
• Overload protection 600V-PTC10.4
CONTINUITY, DIODE MEASUREMENT
RANGE
RESOLUTION
REMARK
0.1Ω
Set value: Open circuit: resistance >30Ω, no beep; Well-connected
circuit: resistance ≤30Ω, audio/visual alarm
0.001V
Open circuit voltage: about 3V (test current is about 1.2mA) Silicon PN
junction normal voltage: about 0.5~0.8V, with audio/visual alarm
!
Overload protection: 600V-PTC
• Reading <0.12V: red indicator will be on with continuous beeps, indicating the diode
may break down;
• Reading within 0.12V-2V: green indicator will be on with one beep, indicating the diode
works well.
