Mastech MS8301A Digital Multimeter
Quick Start Guide
Safety Precautions
Special attention should be paid when using test and measurement instruments. Improper usage may cause electric shock and damage the equipment.
- Use proper measurement category (CAT), voltage, and amperage rated probes, test leads, and adapters.
- Do not use or store the device around explosive gas, vapor, or under high temperature and humidity.
- When handling test probes and crocodile clips, keep fingers behind the physical guard.
- Examine test leads before use. Replace any with deteriorated insulation.
- Connect the common test lead before the live test lead, and remove the live test lead before the common test lead.
- Before measuring current, ensure the instrument fuses are available and disconnect the power supply to the circuit.
- Remove batteries if the device is not used for an extended period or stored in temperatures above 45°C to prevent battery leakage damage.
Specifications
| Measurement | Range | Resolution | Accuracy |
|---|---|---|---|
| DC Voltage (V⎓) | 200mV / 2V / 20V / 200V | 100µV / 1mV / 10mV / 100mV | ±(0.5%+3) |
| 600V | 1V | ±(1.0%+10) | |
| AC Voltage (V~) | 200V | 100mV | ±(1.2%+10) |
| 600V | 1V | ±(0.8%+5) | |
| DC Current (A⎓) | 2mA | 1µA | ±(1.0%+3) |
| 20mA | 10µA | ±(1.0%+5) | |
| 200mA | 100µA | ±(1.5%+5) | |
| 10A | 10mA | ±(3.0%+10) | |
| Resistance (Ω) | 200Ω | 0.1Ω | ±(1.2%+5) |
| 2kΩ / 20kΩ / 200kΩ | 1Ω / 10Ω / 100Ω | ±(0.8%+2) | |
| 2MΩ | 1kΩ | ±(1.0%+5) | |
| Battery Test | 1.5V / 9V | 0.001V / 0.01V | 47Ω / 300Ω (Load Impedance) |
Basic Measurements
DC Voltage Measurement
Connect the red probe to the VΩmA jack and the black probe to the COM jack. Set the dial to the appropriate DC voltage range (V⎓). Connect the probes across the component to be measured.
Example: Measuring 220V AC results in 220.
AC Voltage Measurement
Connect the red probe to the VΩmA jack and the black probe to the COM jack. Set the dial to the appropriate AC voltage range (V~). Connect the probes across the component to be measured.
Example: Measuring 12.46V AC results in 12.46.
DC Current Measurement
Connect the red probe to the 10A or mA jack (depending on expected current) and the black probe to the COM jack. Set the dial to the appropriate DC current range (A⎓). Break the circuit and connect the multimeter in series.
Example: Measuring 2.53A DC results in 2.53.
Resistance Measurement
Connect the red probe to the VΩmA jack and the black probe to the COM jack. Set the dial to the appropriate resistance range (Ω). Ensure the circuit is de-energized. Connect the probes across the resistor.
Example: Measuring 500Ω results in 500.
Continuity Test
Connect the red probe to the VΩmA jack and the black probe to the COM jack. Set the dial to the continuity test symbol (often looks like a sound wave or diode symbol). Touch the probes to the component. A beep indicates continuity.
Example: Measuring a resistance of less than 50Ω results in 22.
Battery Test
Connect the red probe to the VΩmA jack and the black probe to the COM jack. Set the dial to the appropriate battery test voltage (e.g., 1.5V or 9V). Connect the probes to the battery terminals.
Example: Measuring a 9V battery results in 9.
