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ISO 9001 Certified

Vanguard Instruments Company, Inc., Electronic Testing Equipment, Ontario, CA


Winding Resistance Ohmmeter


[ View Interactive Demo ]

This product is no longer in production.
  • Auto Current Ranging from 10 MA to 40 Amps
  • Digital Resistance Reading from 1 micro-ohm to 500 ohms
  • Auto discharge circuit for operator safety
  • Built-in 2.5" Thermal Printer, computer interface
  • Stores 48 records of 63 readings
  • Weighs less than 30 lbs.





Technical Specifications

TYPE Portable transformer winding resistance meter
PHYSICAL SPECIFICATIONS 25”W x 8.5”H x 20”D (63.5 cm x 21.6 cm x 50 cm); Weight: 44 lbs (20 kg)
INPUT POWER 100 – 120 Vac or 200 – 240 Vac (factory pre-set), 50/60 Hz
RESISTANCE READING RANGE 1 micro-ohm – 500 ohms
ACCURACY 1 – 19,999 micro-ohms: ±0.5% reading, ±1 count;
20 – 999 milli-ohms: ±1% reading, ±1 count;
1 – 500 ohms: ±1.5% reading, ±1 count
TEST CURRENT RANGE Auto range, 40 Amperes max
DISPLAY Back-lit LCD Screen (20 characters by 4 lines); viewable in bright sunlight and low-light levels
PRINTER 2.5-inch wide built-in thermal printer
KEYPAD Rugged membrane keypad (10 alpha-numeric keys, 6 function keys)
INTERNAL TEST RECORD STORAGE Stores 63 test records of 48 readings each
COMPUTER INTERFACE One RS-232C (19,200 baud) port
PC SOFTWARE Windows® XP/Vista-based software is included with purchase price
SAFETY Designed to meet IEC61010 (1995), UL61010A-1, CSA-C22.2 standards
ENVIRONMENT Operating: -10˚C to 50˚ C (15˚F to +122˚ F); Storage: -30˚ C to 70˚ C (-22˚F to +158˚ F)
CABLES Three 50-foot test cables, ground cable, power cord and cable bag
OPTIONS Transportation case
WARRANTY One year on parts and labor
Specifications are valid at nominal voltage and ambient temperature of +25˚C (+77˚F).
Last updated on February 16, 2009

Field Pictures

WRM-40 Testing in Khanh Hoa, Vietnam
WRM-40 Testing in Noi Bai, Vietnam