WR100-12R: 100 Amp, 2 Channel Winding Resistance Meter with Demagnetization and Discharge

Overview

WR100-12R is a Raytech digital winding resistance meter, described as a 100 Amp, 2 Channel winding resistance system in a 19″ rack-mounting casing (Rack Unit: 7U) with an advanced demagnetizing circuit. The unit is a rack version with a sealed, anodized front panel and a panel-mounted Emergency Stop Switch. Unique measuring technique incorporates a high precision measurement circuit, a dedicated power source and a fast discharge unit. The instrument measures resistance from 0.00 μΩ to 100 kΩ and inductance from 0 to 1,500 Henry. Test current is user selectable from 25 mA … 100 A (Operation text also references preset current selection from 0.025A to 100A), and the output voltage range is 0 to 50V DC. The supplied measurement table covers current ranges from 30 – 100A down to <25 mA with example accuracies such as ± 0.1% Rdg ± 0.05 μΩ for 30 – 100A and up to ± 0.8% Rdg ± 20 Ω for 10 kΩ … 100 kΩ. Physical and system features include size L: 490 mm W: 436 mm H: 310 mm, weight 21.9 kg (48.3 lbs.), input power 2 x 90 to 264 VAC (3 kW max.), 47–63 Hz automatic ranging, and operating temperature -10ºC to 60ºC. The front panel offers a color LCD with backlight and touch screen, and interfaces include 4 USB 2.0 (3 host, 1 device) and a 9 Pin RS-232 serial port. The system internally stores more than 10,000 test results, provides complete automatic calibration and system diagnostics, has temperature channels with automatic resistance correction, an automatic high-efficiency cooling system with automatic shut off for over-temperature conditions, and carries a 5-Year standard warranty. The WR100-12R is designed for high-accuracy measurement of very low resistance on inductive loads and is categorized for winding resistance for the factory. It applies a user- or preset current level (noted as 25 mA … 100 A and 0.025A to 100A in the product text) to produce resistance measurements that are displayed and stored internally. The instrument’s advanced demagnetizing circuit, fast discharge unit, temperature channels with automatic resistance correction, and internal storage for over 10,000 test results support routine winding resistance testing, demagnetization after measurements, and rapid discharge of tested components. Automatic calibration, system diagnostics and rack-mount form factor support sustained use in test environments described by the product.