MASTECH M9912 AC/DC Clamp Meter Quick Start Guide
Model: M9912
About MGL Group and Product Information
MGL Group is an international organization providing test and measurement instruments. The MASTECH M9912 is an AC/DC Clamp Meter.
SKU Number: MS9912CBGLO
Warranty: 1 Year Limited Warranty
Contact Information
EMEA
MGL EUMAN S.L.
C/ Picu Castiellu, Parcelas i1-i4 33163, Argame Morcín, Asturias, Spain
Tel: +34 985-08-18-70
Email: cs.emea@mgl-intl.com
USA
MGL AMERICA, INC.
2810 Coliseum Centre Drive, Ste. 100 Charlotte, North Carolina 28217 USA
Tel: +1 833-533-5899
Email: cs.na@mgl-intl.com
United Kingdom
MGL GROUP U.K. LIMITED
14 Weller St, London, SE1 1QU, UK
Tel: +34 985-08-18-70
Email: cs.uk@mgl-intl.com
Mexico & LATAM
MGL LATAM S.A DE CV
Colonia Industrial Vallejo Del. Azcapotzalco 02300, Mexico D.F
Tel: +1 833-533-5899
Email: cs.latam@mgl-intl.com
APAC
MGL APPA Corporation
Flat 4-1, 4/F, No. 35, Section 3 Minquan East Road, Taipei, Taiwan.
Tel: +886 2-2508-0877
Email: cs.apac@mgl-intl.com
Important Safety Precautions
Warning: Special attention should be paid when using this test and measurement instrument, as 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 near explosive gas, vapor, or in high temperature and humidity environments.
- Keep fingers behind the physical guard when handling test probes and crocodile clips.
- Examine test leads before use. Replace any with deteriorated insulation.
- Connect the common test lead before the live test lead, and disconnect the live test lead before the common test lead.
- Before measuring current, ensure the instrument's fuses are intact and disconnect power to the circuit.
- Remove batteries if the device is not used for an extended period or stored above 45°C to prevent leakage and damage.
Safety Rating: [CAT II 600V]
Specifications
| Measurement | Range | Resolution | Accuracy |
|---|---|---|---|
| Voltage AC/DC (V~ / V-) | 3V/30V/300V 750V |
1mV/10mV/100mV 1V |
±(1.0%+5) ±(1.2%+5) |
| Current AC (A~) | 300A 1000A |
0.1A 1A |
±(2.0%+10) ±(3.0%+10) |
| Current DC (A-) | 300A 1000A |
0.1A 1A |
±(2.0%+5) ±(3.0%+5) |
| Resistance (Ω) | 300Ω/3kΩ/30kΩ/300kΩ/3MΩ 30MΩ |
0.1Ω/1Ω/10Ω/100Ω/1kΩ 10kΩ |
±(2.0%+10) ±(2.5%+10) |
| Frequency (Hz) | 30kHz | 10Hz | ±(2.0%+10) |
Operating Instructions
1. Battery Installation
Description: The rear of the clamp meter is opened to insert batteries.
Steps:
- Open the battery compartment cover on the back of the device.
- Insert batteries.
- Close the battery compartment cover securely.
2. Measuring Voltage (V~ / V-)
Description: Connect the black test lead to the [COM] terminal and the red test lead to the [VHz] terminal. Set the dial to 'V~' (AC Voltage) or 'V-' (DC Voltage). The display shows a sample reading of 220V.
Steps:
- Connect the black test lead to the [COM] terminal.
- Connect the red test lead to the [VHz] terminal.
- Turn the dial to the desired voltage range (V~ for AC, V- for DC).
- Connect the test leads across the circuit or component. For AC voltage, the clamp jaws can also be used around a single conductor.
- Read the measurement on the digital display.
3. Measuring Current (A~ / A-)
Description: Set the dial to 'A~' (AC Current) or 'A-' (DC Current). Place the clamp jaws around a single conductor. The display shows a sample reading of 2.53A.
Steps:
- Turn the dial to the desired current range (A~ for AC, A- for DC).
- Open the clamp jaws and place them around a single conductor carrying the current to be measured. Ensure the jaws close completely.
- Read the measurement on the digital display. Select the appropriate range (e.g., 300A or 1000A).
4. Measuring Resistance (Ω)
Description: Connect the black test lead to the [COM] terminal and the red test lead to the [VHz] terminal. Set the dial to 'Ω'. The display shows a sample reading of 27.01Ω. A [Beep] symbol indicates a continuity/low resistance alert.
Steps:
- Connect the black test lead to the [COM] terminal.
- Connect the red test lead to the [VHz] terminal.
- Turn the dial to the desired resistance range (Ω).
- Connect the test leads across the component to measure resistance. Ensure the circuit is de-energized.
- Read the measurement on the digital display. The device may beep for low resistance values.
5. Measuring Frequency (Hz)
Description: Connect the black test lead to the [COM] terminal and the red test lead to the [VHz] terminal. Set the dial to 'Hz/%'. The display shows a sample reading of 50.12 Hz.
Steps:
- Connect the black test lead to the [COM] terminal.
- Connect the red test lead to the [VHz] terminal.
- Turn the dial to the 'Hz/%' setting.
- Connect the test leads to the signal source or circuit. For AC frequency, the clamp jaws can also be used around a single conductor carrying an AC signal.
- Read the measurement on the digital display.
