LX20 - Measurement Sanwa - Free user manual and instructions
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| Product Type | Digital Multimeter |
| Brand | Sanwa |
| Model | LX20 |
| Category | Measurement |
| Display Type | LCD, 4000 counts |
| DC Voltage Range | 400mV to 600V |
| AC Voltage Range | 400mV to 600V |
| DC Current Range | 400μA to 10A |
| Resistance Range | 400Ω to 40MΩ |
| Additional Functions | Continuity test, diode test, capacitance, frequency |
| Safety Rating | CAT II 600V, CAT III 300V |
| Power Supply | 2 x AAA batteries (1.5V) |
| Auto Power Off | Yes, after approx. 15 minutes |
| Dimensions | 140 x 70 x 30 mm |
| Weight | Approx. 200 g (including batteries) |
| Input Impedance | ≥10 MΩ (DC/AC V) |
| Operating Temperature | 0°C to 40°C |
| Accessories Included | Test leads, batteries, manual |
| Warranty | 1 year limited warranty |
| Maintenance | Keep clean and dry; replace batteries when low |
Frequently Asked Questions - LX20 Sanwa
How do I measure DC voltage with the Sanwa LX20?
Turn the rotary switch to the DC voltage position (usually marked 'V' with a straight line or 'DCV'). Connect the black test lead to COM and red to VΩHz. Touch the probes to the circuit and read the display. Note the polarity: if the red probe is negative, the display will show a minus sign.
Can the LX20 measure AC current?
Yes, it can measure AC current up to 10A. Select the appropriate current range (μA, mA, or A) and press the 'AC/DC' button if needed. Connect the test leads in series with the load. Never exceed the rated current for more than 30 seconds for the 10A range.
How do I test continuity with this multimeter?
Turn the dial to the continuity/beep setting (usually a diode symbol with sound waves). Connect the probes across the component or circuit. If the resistance is less than about 50Ω, the meter will emit a continuous beep. Ensure the circuit is powered off before testing.
What is the symbol for diode test on the LX20?
The diode test function is usually combined with continuity and indicated by a diode symbol (→+). Select that position. The meter will display the forward voltage drop across the diode. A good silicon diode typically reads 0.6-0.8V.
How do I replace the batteries in the Sanwa LX20?
Turn off the meter and remove the test leads. Unscrew the battery cover screw (usually at the back). Lift the cover and replace the two AAA batteries with new ones, observing polarity. Replace the cover and screw. Dispose of old batteries properly.
Does the LX20 have an auto-ranging feature?
Yes, the LX20 is an auto-ranging multimeter. It automatically selects the appropriate measuring range for voltage and resistance. For current, you may need to select the manual range depending on the jack used. Press the Range button to switch to manual ranging if needed.
What safety precautions should I take when using the LX20?
Always use the correct input jacks (COM vs VΩHz vs A) and select the proper function. Never measure voltage on high-energy circuits above the CAT rating (600V CAT II). Inspect test leads for damage before use. Ensure the meter is set to the correct measurement type and range before connecting.
Can I measure capacitance with the LX20?
Yes, the LX20 includes a capacitance measurement function. Select the capacitance mode (usually labeled 'F' or 'CAP'). Discharge the capacitor before testing. Connect the probes to the capacitor leads (red to positive, black to negative for polarized caps) and read the value. Accuracy may be reduced for very small or large capacitors.
What does 'OL' mean on the display?
'OL' stands for Over Load and indicates the input exceeds the meter's maximum range for the selected function. This can happen if you measure voltage on a resistance range, or the voltage is too high. Immediately disconnect and select a higher range or proper function to avoid damaging the meter.
How do I clean and maintain my Sanwa LX20?
Wipe the exterior with a damp cloth and mild detergent. Do not use solvents. Remove batteries if storing for extended periods. Keep the terminals clean. Calibration is recommended every year for professional use. Store in a dry, dust-free environment.
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