Do you have a question about the Mastech m3900 and is the answer not in the manual?
Never exceed protection limits, do not touch unused terminals, set highest range initially.
Instructions for connecting leads, setting the rotary switch, and measuring AC/DC voltage.
Guidance on connecting leads to the correct A jacks and setting the rotary switch for current measurement.
Steps for connecting leads to COM and V/Ω jacks for resistance measurement.
Detailed specs for DC voltage: range, resolution, accuracy, and overload protection.
Detailed specs for AC voltage: range, resolution, accuracy, and frequency range.
Detailed specs for DC current: range, resolution, accuracy, and overload protection.
Crucial safety warning to disconnect test leads before opening the case.
| Type | Digital Multimeter |
|---|---|
| Max DC Voltage | 1000V |
| Max AC Voltage | 750V |
| Max DC Current | 10A |
| Max AC Current | 10A |
| Resistance Range | 200Ω to 20MΩ |
| Capacitance Range | 20nF to 200μF |
| Diode Test | Yes |
| Continuity Test | Yes |
| Battery | 9V |
| Weight | 350g |
| Display | LCD |
| Duty Cycle | 0.1% ~ 99.9% |