800A AC/DC with LPF Clamp Meter ( HTC – CM-2018 )

Description

The HTC CM‑2018 Digital AC/DC Clamp Meter is a highly capable, feature-rich instrument designed for electricians, industrial technicians, HVAC professionals, and service engineers who demand accuracy, versatility, and safety in field diagnostics. Built around a True RMS measurement core and a high-resolution 5,999‑count (3 5/6‑digit) backlit LCD, it ensures precise readings across a full suite of electrical parameters—even under complex power conditions.

This clamp meter supports both AC and DC current measurement up to 800 A, using a convenient 28 mm jaw opening that accommodates a variety of conductor sizes without circuit disruption. With AC and DC current resolution down to 1 mA to 100 mA, and an accuracy specification of ±(1.5% + 5 digits) in the 60 A range, the CM‑2018 delivers reliable performance when monitoring large load currents in motors, distribution circuits, and control panels.

It also handles voltage diagnostics comprehensively. DC voltage is supported up to 600 V, with resolution from 0.1 mV to 0.1 V and accuracy as fine as ±(0.5% + 5 digits) in mid‑ranges; AC voltage similarly goes up to 600 V RMS, with Low‑Impedance (LoZ) and Low‑Pass Filter (LPF) modes to suppress ghost voltages and filter high-frequency interference—ideal for testing power tools, inverters, and switched-mode power supplies.

The CM‑2018 is a full-featured tool beyond current and voltage. It offers resistance measurement up to 60 MΩ, with various auto‑ranges (600 Ω to 60 MΩ), resolution from 0.1 Ω to 10 kΩ, and accuracy from ±(0.8% + 5 digits) at lower values to ±(1.0% + 5 digits) at the highest range. A built‑in continuity buzzer sounds below approximately 50 Ω, enabling quick fault detection in wiring or circuitry.

Capacitance testing spans from 6 nF to 60 mF, with resolution as small as 1 pF and accuracy ranging from ±(2.5% + 5 digits) in mid‑ranges to ±(5% + 10 digits) at extremes—precisely suited for verifying capacitor health in electronic boards or motor start/run circuits. Frequency measurement extends up to 10 MHz, featuring resolutions from 0.001 Hz to 1 kHz and accuracy around ±(0.5% + 4 digits)—ideal for examining inverter outputs, signal frequencies, or PWM applications.

Crucially, the CM‑2018 includes temperature measurement via a Type‑K thermocouple probe, spanning –40 °C to 1000 °C (or –40 °F to 1832 °F) with 1-degree resolution. Its accuracy remains high at ±(1.0% + 5 digits) under 400 °C and ±(1.5% + 15 digits) above 400 °C—making it well-suited for HVAC checks, motor insulation monitoring, or environmental diagnostics.

For enhanced safety, the meter offers Non‑Contact Voltage (NCV) detection in 5 sensitivity ranges, enabling users to identify live conductors without physical contact—especially useful in panel or outlet diagnostics. A built‑in clamp torch light focuses illumination at the jaw area for improved visibility in confined, dimly lit spaces.

Ease of use is built into every aspect. The device includes Data Hold, Relative (REL) measurement mode, MAX/MIN recording, and auto-ranging/manual‑range selection. It features auto shut-off (after approximately 15 minutes), a low‑battery indicator at around 2.6 V, an over-range (“OL”) display, and input protection to guard against misuse—ensuring both performance and user safety.

Powered by two AAA batteries, the CM‑2018 achieves long runtime in the field. It samples at three readings per second, providing responsive digital readouts while maintaining stable display performance. The unit meets IEC 61010‑1 CAT III 600 V safety standards, offering reliable insulation and protected operation across its functions.

Measuring approximately 35 × 123 × 270 mm and weighing just ~200 g, this meter is both portable and rugged. It includes standard accessories such as test leads, a soft carrying case, user manual, and TP‑04 temperature probe—ensuring it’s ready to deploy right out of the box.

Key Capabilities & Features:

• 5,999‑count True RMS display with backlight and polarity indicator

• AC/DC current up to 800 A via 28 mm clamp jaw, resolution to 1 mA

• DC voltage up to 600 V, AC voltage up to 600 V (with LPF & LoZ modes)

• Resistance, capacitance, frequency (up to 10 MHz), diode test, continuity buzzer

• Temperature measurement (–40 °C to +1000 °C) via Type‑K probe

• NCV detection, clamp torch, Data Hold, REL, MAX/MIN, auto-off functions

• Fast sampling (~3 readings/sec), overload protection, input impedance 10 MΩ

• Safety certified: IEC CAT III 600 V; robust and portable at ~200 g

Ideal Applications:

The HTC CM‑2018 clamp meter excels in:

• Performing live current measurement in power panels, motor feeders, or switchgear

• Measuring line voltages and suppressed“ghost” voltages via LoZ or LPF mode

• Diagnosing component integrity and wiring with resistance, capacitance, and continuity testing

• Verifying switching frequency signals in inverters or control modules

• Recording temperature of motors, HVAC systems, or insulation surfaces

• Safely detecting live wires using NCV before probe use

• Capturing peak or fluctuating electrical values with MAX/HOLD and REL features

In summary, the HTC CM‑2018 Digital AC/DC Clamp Meter is a reliable, feature-packed tool offering True RMS precision, wide measurement ranges, and comprehensive test capabilities in a lightweight, ergonomic package. Its built‑in NCV, torch illumination, LPF/LoZ filtering, and safety compliance make it a premier choice for professionals working in electrical diagnostics, HVAC maintenance, and industrial settings. With its easy-to-use interface and robust performance, this meter ensures accurate, safe, and efficient testing operations for technicians in the field.