LCR-USB - Measurement Sanwa - Free user manual and instructions
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| Type of product | LCR meter (Inductance, Capacitance, Resistance measurement) |
| Brand | Sanwa |
| Model | LCR-USB |
| Measurement functions | Inductance (L), Capacitance (C), Resistance (R) |
| USB interface | Mini-USB port for PC connection and data logging |
| Display | Backlit liquid crystal display with 4000 counts |
| Resistance range | 0.01 Ω to 20 MΩ |
| Capacitance range | 1 pF to 20 mF |
| Inductance range | 1 μH to 20 H |
| Test frequency | 100 Hz, 1 kHz, 10 kHz selectable |
| Basic accuracy | ±0.5% of reading for resistance and capacitance |
| Power source | One 9V alkaline battery or USB power supply |
| Dimensions (W x H x D) | 175 x 87 x 38 mm |
| Weight | Approx. 300 g (including battery) |
| Auto power off | Yes, adjustable timeout (default 15 minutes) |
| Data logging | Real-time recording via USB with provided software |
| Software compatibility | Windows 7/8/10/11, USB UART driver required |
| Safety rating | CAT I 1000V, CAT II 600V (on resistance input) |
| Operating temperature | 0°C to 40°C, relative humidity ≤80% |
| Storage temperature | -10°C to 50°C, relative humidity ≤90% |
| Included accessories | Test leads, USB cable, software CD, carrying case, manual |
| Repairability | Replaceable fuses and battery, calibration service available |
| Cleaning and maintenance | Wipe with dry soft cloth; do not use solvents or immerse in water |
Frequently Asked Questions - LCR-USB Sanwa
How do I measure capacitance with the Sanwa LCR-USB?
To measure capacitance, select the capacitance (C) function, connect the capacitor to the test leads, and read the value from the LCD. For polarized capacitors, observe the correct polarity. For best accuracy, discharge the capacitor before testing and use the relative mode to subtract lead capacitance.
How do I connect the LCR-USB to a computer?
Connect the meter to your PC using a mini-USB cable. Install the provided USB driver and the included software. Once connected, the meter can transfer live measurements and log data to the application for analysis.
What is the accuracy of the resistance measurement?
The resistance measurement has a basic accuracy of ±0.5% of the reading, plus a few digits depending on the range. Accuracy is specified for measurements within the operating temperature range of 23°C ±5°C and relative humidity below 80%.
Can the meter measure components that are still in a circuit?
It is generally recommended to measure components out of circuit to avoid interference from parallel components. In-circuit measurements can be performed only if the circuit is powered off and all capacitors are discharged, but readings may be inaccurate due to surrounding components.
How do I replace the battery?
To replace the battery, turn off the meter, remove the back cover using a screwdriver, disconnect the old 9V battery, and attach a new 9V alkaline battery. Reattach the cover and secure it. Always use a battery of the recommended type to avoid damage.
What type of USB cable is required?
The meter requires a standard mini-USB cable (also called Mini-B USB). Ensure it is a data-capable cable, not a charge-only cable, for proper communication with your PC.
Is the LCR-USB auto-ranging?
Yes, the device offers auto-ranging functionality that automatically selects the appropriate measurement range. You can also manually select a fixed range using the range button if you prefer greater control over the measurement.
How do I perform a zero adjustment before making measurements?
Use the relative mode (REL) to zero the display. Short the test leads for resistance measurements or leave them open for capacitance measurements, then press the REL button to set the reference. This subtracts lead resistance and stray capacitance from subsequent readings.
What safety precautions should I take when measuring capacitors?
Always discharge capacitors completely before connecting them to the meter. Capacitors can store dangerous voltage even after power is removed. Use a suitable discharge tool or resistor, verify with a voltmeter, and then measure. Never exceed the meter's rated voltage ratings.
Can the device measure low-value components accurately?
The meter can measure resistances down to 0.01 Ω, capacitances down to 1 pF, and inductances down to 1 μH. For low-value measurements, use the relative mode to compensate for test lead impedance and ensure stable readings by keeping leads short and separated.
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USER MANUAL LCR-USB Sanwa
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Product information
Brand : Sanwa
Model : LCR-USB
Category : Measurement