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Martindale MM39 Standard Digital Multimeter - Auto Ranging
The Martindale MM39 is an autoranging, portable multimeter that can be used to carry out DC voltage, AC voltage, AC current, DC current, resistance, diode and continuity testing procedures.
When measuring voltages, the MM39 features measurement range of 0.1mV to 600V on both AC/DC, with five ranges available. When measuring current, the device features range of 0.01A to 10A, and when measuring resistance the MM39 has measurement range of 0.1 to 20MΩ. It also features a continuity buzzer which will sound at less than 25Ω.
Using the MM39 is straightforward. The device features a rotary dial for quick selection between different available parameters, and it also has a button for changing the range, and a button for holding the data currently displayed on screen. Above this there's also a 3.5 inch LCD screen which relays testing results.
Martindale MM39 Standard Digital Multimeter Key Features
- Low cost DMM
- Multiple testing procedures
- Varied measurement range
- Large rotary dial made for comfort even when wearing gloves
- Audible indication when carrying out continuity testing
- 3.5inch LCD screen
- Data hold function
- Auto polarity and zero
Full List of Products Included
- Martindale MM39 Standard Digital Multimeter
- TL16 Test Leads
- 2 x 1.5V Batteries
- Instruction Manual
Technical Specifications
| Display | 3.5 inch digit liquid crystal display (LCD) with max reading of 1999 |
| Polarity | Automatic, positive implied, negative polarity indication |
| Overrange | (OL) or (-OL) is displayed |
| Zero | Automatic |
| Low battery | Symbol displayed when below certain level |
| Measurement Rate | 2 times per second, nominal |
| Auto Power Off | Approx. 10 mins |
| Operating Environment | 0 to 50°C at <70% relative humidity |
| Storage Temperature | -20 to 60°C at <80% relative humidity |
| Accuracy | Stated accuracy at 23°C ±5°C, <75% relative humidity |
| Temperature Coefficient | 0.1 x (specified accuracy) per °C (0 to 18°C, 28-50°C) |
| Altitude | 6561.7 feet (2000m) |
| Power | 1.5V batteries x 2, RO3/Size AAA |
| Battery Life | 200 hours typical with carbon-zinc |
| Dimensions | 145mm (H) x 70mm (W) x 34mm (D) |
| Weight | Approx 11.1oz (315g) including holster |
| DC Volts | |
| DC Voltage Range | 200mV, 2V, 20V, 200V, 600V |
| DC Resolution | 0.1mV |
| Accuracy | ±(1.0% rdg + 2 dgts) |
| Input Impedance | 200mV: >100MΩ: 2V: 10MΩ, 20V-600V: 9.1MΩ |
| Overload Protection | 600VDC or AC RMS |
| AC Volts (50Hz-500Hz) | |
| Ranges | 200mV, 2V, 20V, 200V, 600V |
| Resolution | 0.1mV |
| Accuracy | ±(2.0% rdg + 5dgts) 50Hz-100Hz on 200mV range, ±(2.0% rdg + 5 dgts) |
| Input Impedance | 200mV: >100MΩ: 2V: 10MΩ, 20V-600V: 9.1MΩ |
| Overload Protection | 600V DC or AC rms |
| Current | |
| Ranges | 10A |
| Resolution | 0.01A |
| DC Accuracy | ±)3.0% rdg + 3 dgts) |
| AC Accuracy | (50Hz-500Hz) ± (3.5% rdg + 5 dgts) |
| Voltage Burden | 0.2V |
| Input Protection | 10A/500V fast blow ceramic fuse |
| Resistance | |
| Ranges | 200Ω, 2kΩ, 20kΩ, 200kΩ, 2MΩ, 20MΩ |
| Resolution | 0.1Ω |
| Accuracy | ±(1.5% rdg + 4 dgts) on 200Ω to 200kΩ ranges ±(2.5% rdg +4 dgts) on 2MΩ range ±(5.0% rdg + 5 dgts) on 20MΩ range |
| Open Circuit Volts | -0.45Vdc (-1.2Vdc on 200Ω range) |
| Overload Protection | 500V DC or AC rms |
| Diode Test | |
| Test Current | 1.0mA (approximate) |
| Accuracy | ±(3.0% rdg + 3 dgts) |
| Resolution | 10mV |
| Audible Indication | <0.25V |
| Open Circuit Volts | 3.0Vdc typical |
| Overload Protection | 500V DC or AC rms |
| Continuity | |
| Audible Indication | Less than 25Ω |
| Response Time | 500ms |
| Overload Protection | 500V DC or AC rms |
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Additional Information
| SKU | MARMM39 |
|---|---|
| Manufacturer Part Code | MARMM39 |
