AM-140-A - Multimeter Amprobe - Free user manual and instructions
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| Product Type | Digital Multimeter |
| Brand | Amprobe |
| Model | AM-140-A |
| Dimensions (HxWxD) | 145 x 70 x 35 mm |
| Weight | 200 g |
| Power Supply | 9V battery (NEDA 1604) |
| Display | 3.5 digit LCD with backlight |
| DC Voltage Range | 200 mV - 600 V |
| AC Voltage Range | 200 mV - 600 V |
| DC Current Range | 200 µA - 10 A |
| Resistance Range | 200 Ω - 20 MΩ |
| Capacitance Measurement | 2 nF - 200 µF |
| Frequency Measurement | 20 kHz |
| Continuity Test | Built-in buzzer |
| Diode Test | Yes |
| Safety Rating | CAT III 600 V |
| Operating Temperature | 0°C to 40°C |
| Storage Temperature | -10°C to 50°C |
| Accessories Included | Test leads, 9V battery, manual |
| Cleaning Instructions | Wipe with dry cloth, no solvents |
| Spare Parts Availability | Test leads and battery can be replaced |
Frequently Asked Questions - AM-140-A Amprobe
How to measure AC voltage with the Amprobe AM-140-A?
Set the rotary switch to AC voltage (V~). Insert the black lead into COM and red lead into V/Ω/Hz. Connect probes to the circuit and read the display.
What does the continuity test beep indicate?
A continuous beep indicates a closed circuit with resistance < 50 Ω. The meter is used to check wiring and fuses.
How to replace the battery in the AM-140-A?
Remove the screw on the battery cover on the back. Replace the 9V battery with a new one. Ensure correct polarity. Reattach cover.
What is the maximum current the multimeter can measure?
The AM-140-A can measure up to 10 A DC/AC. Use the 10A jack for high currents; for currents < 200 mA use the mA jack.
How to test a diode with this multimeter?
Set the rotary switch to diode symbol (→+). Connect red lead to anode and black to cathode. Display shows forward voltage drop (0.5-0.8V for silicon).
Can the AM-140-A measure capacitance?
Yes, it can measure capacitance from 2 nF to 200 µF. Set the switch to Capacitance (Cx) mode and discharge the capacitor before testing.
What safety precautions should I take?
Always use the correct input jacks and range. Do not exceed the rated voltage (600V CAT III). Wear insulated gloves and remove test leads from circuit before switching modes.
How do I use the backlight?
Press the backlight button (usually LIGHT) to turn on the display backlight. It will automatically turn off after a few seconds to save battery.
What does the 'OL' reading mean?
OL stands for Over Limit, meaning the measured value exceeds the selected range. Switch to a higher range to get a proper reading.
How to clean the multimeter?
Wipe the housing with a damp cloth and mild detergent. Never use solvents or abrasives. Keep the input terminals clean and dry.
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USER MANUAL AM-140-A Amprobe
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Product information
Brand : Amprobe
Model : AM-140-A
Category : Multimeter