TRM-403 Winding Resistance Meter

Auto-discharge circuit for operator safety
Demagnetizes transformer after test
Selectable test current from 1A to 40A
RS-232C, USB, and Bluetooth computer interfaces
Built-in thermal printer
4 channels
Perform three phase test on a transformer without the need to switch cables
Can provide individual Delta winding resistance values
Can provide individual Wye (with no neutral) winding resistance values

The TRM-403 is a three phase transformer winding resistance meter that allow the user to connect all test cables to the transformer bushings. The unit will then measure the transformer resistance value for each of the phases without the need to disconnect and reconnect cables for each phase. The TRM-403 can provide a fast and stable reading of very large transformers by utilizing a 60Vdc power supply. It is capable of outputting a selectable test current from 1A to 40A. Since the TRM-403 can accurately measure resistance from 1 micro-ohm to 500 Ohms, it can be used as a micro-ohm meter to measure EHV circuit breaker contact resistance, or for any low resistance measuring application.

TYPE	Special-purpose test equipment, portable, micro-ohmmeter
CONTROL	Heavy duty keypad: 10 number keys, 6 function keys
SIZE	21" wide by 17" high by 9" deep
WEIGHT	15,8kg.
RESISTANCE READING CHANNELS	4 input channels for measuring resistance
RESISTANCE RANGE	1 micro-ohm to 500 ohms
ACCURACY	1-19,999 micro-ohm: ± 0.5% of Reading, ± 1Count 20-999 milliohms: ± 1.0% of Reading, ± 1Count 1-500 ohms: ± 2.0% of Reading, ± 1Count
CURRENT, VOLTAGE RANGES	Auto Ranging, 40 Amperes Max 60 Vdc charging, 18V DC max during measurement
DISPLAY	Backlit LCD (128x64 pixels)
MEMORY	Store 256 records in Flash EEPROM, up to 111 readings per record
COMPUTER INTERFACE	RS-232C , USB, Bluetooth
PC SOFTWARE	Windows® 95/98/2000/NT/XP - based software included
PRINTER	Thermal Printer, 2.5-inch
CABLES	4 sets of 50' Test Cables, Ground Cable, Power Cord and Cable Bag
OPERATING POWER	85 to 132 V ac / 200-240 V ac, 50/60 Hz
ENVIRONMENT	Operating: -10ºC to 50ºC (15º to +122º F) Storage: -30ºC to 70ºC (-22º to +158º F)
OPTIONS	Shipping Case
WARRANTY	One Year Parts & Labor, Post Warranty Service Contract Available