• Direct 2-channel digital reading (1 µΩ to 2000 Ω)
• DC test current up to 10 A maximum
• 0.25% measurement accuracy
• Integrated demagnetization feature
• Tests operation of on-load tap-changers
• Very fast auto safety discharge circuit 

The MTO210 Transformer Ohmmeter is a line-operated, field-portable instrument designed specifically to measure the dc resistance of all types of magnetic windings safely and accurately. It can test transformers and rotating machine windings and perform low-current resistance measurements on connections, contacts and control circuits. 

The Transformer Ohmmeter is extremely useful when testing the windings and contact resistance of tap-changers with “make-before-break” contacts and voltage regulators. This action will check for pitted or misaligned contacts as the instrument will give an indication if either condition occurs.

Transformer Ohmmeter

120/240 volt, 50/60 Hz input MTO210

Included Accessories

V1 Potential Lead Set, 60 ft (18 m) 2000-700

V2 Potential Lead Set, 60 ft (18 m) 2000-701

Current Lead Set, 60 ft (18 m) 2000-702

Jumper Lead, 30 ft (9 m) 2000-703

Ground Lead, 15 ft (4.5 m) 4702-7

RS232 Cable for connecting to a PC and Printer CA-RS232

Remote Hand Switch 30915-220

AC Power Cord (IEC60320-C13 to US standard) 17032

AC Power Cord (IEC60320-C13 to Schuko CEE 7/7) 17032-13

Quick Start Guide 37178

Canvas Carrying Bag (for leadset) 30915-211

CAT5e Patch Cable 36798

Instruction Manual ATVMMTO210

PowerDB LITE

Optional Accessories

V1 Potential Lead Set, 100 ft (30 m) 2001-403

V2 Potential Lead Set, 100 ft (30 m) 2001-404

Jumper Lead, 50 ft (15 m) 2001-405

Current Lead Set, 100 ft (30 m) 2001-406

Kelvin Lead Set, 60 ft (18 m) 2001-407

Kelvin Lead Set, 100 ft (30 m) 2001-408

Test Lead Set, 60 ft (18 m) including V1, V2,

Current and 30 ft (9 m) Jumper Lead 1001-425

Test Lead Set, 100 ft (30 m) including V1, V2,

Current and 50 ft Jumper Lead 1001-451

Beacon Strobe Light 37181

Printer (includes battery/line powered serial thermal printer)

120 V, 60 Hz 1001-390

230 V, 50 Hz 1001-401

Foam-lined Transit Case 37009

USB to Ethernet Adapter 90001-541

PowerDB (full version) Software,

1st machine license, soft key DB1001

PowerDB (full version) Software,

1st machine license, USB dongle DB1001S