Overview

Enviro Forest’s high accuracy DC winding resistance ohmmeter with 200A output is a precision instrument for testing transformer windings, low-voltage switch contacts, and other inductive components. This device replaces traditional bridge measurement methods with advanced switching power supply technology and a high-visibility LCD display. It delivers rapid, accurate results with stable data, strong anti-interference capabilities, and arc suppression for safer operation. Designed for field and onsite use, it operates via AC power or a rechargeable battery, making it a reliable and portable solution for power system diagnostics.

Features

Fast testing speed with up to 3 A current output
High measurement accuracy with four-terminal configuration
Constant current supply ensures stable readings
Arc suppression for safe operation
Dual power support with rechargeable battery and AC input
LCD display for clear visibility in sunlight
Strong anti-interference and stable data performance
Portable design for field and onsite testing

Technical Specifications

Measurement Range	1 mΩ to 2 kΩ (in 6 auto-ranging steps)
Resolution	1 µΩ
Measurement Accuracy	± 0.5%
Constant Current Source	3 A (1 µΩ to 2 Ω), 0.3 A (2 Ω to 20 Ω), 0.03 A (20 Ω to 200 Ω), 0.003 A (200 Ω to 2 kΩ)
Display Type	4.5-digit LCD (resistance), 3.5-digit LCD (current/temperature)
Power Supply	DC 12 V to 16.8 V lithium-ion rechargeable battery, AC 220 V, 50 Hz (± 10%)
Power Consumption	≤ 15 W
Relative Humidity	≤ 85% RH
Temperature Range	32 °F to 104 °F (0 °C to 40 °C)
Dimensions	9.45 in x 7.09 in x 3.94 in (240 mm x 180 mm x 100 mm)
Product Weight	4.85 lb (2.2 kg)