Digital LCR Meter ( HTC – LCR-4070 )

Description

The HTC LCR‑4070 Digital LCR Meter is a versatile handheld instrument designed to provide precise measurement of inductance (L), capacitance (C), resistance (R), and continuity—making it a reliable choice for electronics engineers, repair technicians, academic labs, and hobbyists. Featuring a 3½-digit LCD display with 2,000-count resolution, this meter delivers clear, accurate readings for components ranging from tiny SMD capacitors to larger inductors and resistors.

A standout in its class, the LCR‑4070 supports multiple measurement ranges:

• Capacitance: 200 pF to 2000 µF (2 mF) with 0.1 pF resolution and an accuracy of ±(2.5% of reading + 5 digits)

• Inductance: 200 µH up through 20 H, measured to 0.1 µH resolution, with accuracies from ±(2.0% to 5.0% + 5 digits) depending on range.
• Inductance: 200 µH up through 20 H, measured to 0.1 µH resolution, with accuracies from ±(2.0% to 5.0% + 5 digits) depending on range.
• Resistance: From 0.00 Ω to 20 MΩ, with resolutions down to 0.01 Ω, delivering accuracy typically at ±(0.8% to 2.0% + digit)

It also includes a continuity buzzer that sounds below ~30 Ω, enabling rapid detection of shorted or connected circuits. The meter’s test frequency for inductance and capacitance measurements typically lies in the 2 kHz–15 MHz range, ensuring good responsiveness and stability across components.

From a usability standpoint, the LCR‑4070 is intuitive and user-friendly. It includes auto/manual ranging, a zero‑adjust knob for fine calibration (especially useful on low‑value capacitors), and a capacitor self‑discharge protection feature that safely bleeds residual charge after measurement—reducing risk during component testing. A low battery indicator appears when voltage drops below approximately 7.5 V, and the device automatically shuts off after a few minutes to preserve battery life.

Physically, the instrument is built to balance portability with durability. It measures approximately 185 × 93 × 35 mm and weighs around 290–380 g including the 9 V battery (6F22), making it comfortable for handheld use or bench testing. The backlit LCD character size and display clarity make it easy to read even under dim lab lighting, and the transparent interface includes icons for units and measurement status.

The sampling rate, at around three readings per second, helps to balance stability and responsiveness—excellent for swift in-circuit checks or quick sorting tasks. Its measurement protection circuit guards against overloads, and over-range conditions are clearly indicated by “1” on the display to avoid reading errors.

Standard accessories come bundled for immediate operation: a set of test leads, a soft carrying holster, a 9 V battery, and a user manual—everything needed to begin testing immediately out-of-the-box.

Key Benefits & Applications

The LCR‑4070 is suited to a range of practical uses:

• Component testing and validation: accurately assess capacitors, inductors, and resistors for manufacturing, repair work, or quality control.

• Circuit troubleshooting: employ continuity detection and resistance ranges to identify shorts and open circuits quickly.

• Educational use: ideal for electronics teaching labs, providing real-time readings and easy operation for students learning component properties.

• Field diagnostics: compact and battery powered, it’s convenient for technicians needing portable testing instruments.

• SMD and PCB repair: fine resolution and stable ranges make it reliable for testing surface-mounted capacitors or inductors.

Highlights at a Glance

• Display: 3½‑digit LCD, up to 2,000‐count resolution, with backlight for clear viewing.

• Measurement Ranges:

  • Capacitance: 200 pF–2000 µF | resolution 0.1 pF | accuracy ±(2.5% + 5 digits)

  • Inductance: 200 µH–20 H | resolution 0.1 µH | accuracy ±(2.0–5.0%)

  • Resistance: 0.00 Ω–20 MΩ | resolution 0.01 Ω | accuracy ±(0.8–2.0%)

• Continuity buzzer: audible at resistances under ~30 Ω for fast circuit checks.

• Safety features: auto-discharge of capacitors, zero adjustment for baseline leveling, overload detection, and auto power-off.

• Power source: single 9 V battery (6F22) with low-battery alert and up to 150–200 hours usage in moderate ranges.

• Sampling rate: ~3 readings per second with optimized test frequencies across ranges.

• Form factor: 185 × 93 × 35 mm, ~290–380 g. Portable yet robust enough for workshop or field.

• Accessories included: test leads, soft carry case, battery, user manual.

Reliability is a core strength of the LCR‑4070. The meter’s internal protection circuits minimize risk and increase the instrument’s lifespan, while standard operational cautions—like manual discharge for capacitors above 250 V—help avoid equipment damage in high-voltage circuits.

The HTC LCR‑4070 offers a well-rounded solution for precise measurement of L, C, and R with the added convenience of continuity testing. It stands out by combining wide measurement ranges, strong accuracy, auto discharge protection, zero-adjust calibration, and field-ready portability. Its ergonomic design, responsive display, and durable construction make it an essential tool for professionals, educators, and electronics enthusiasts seeking flexible yet dependable component analysis.