ARES-200, 200A DC Micro-ohm Meter with built-in Printer

ARES-200 is a micro-ohmmeter produced using advanced engineering technologies which can apply up to 200 A current. With its easy-to-use software, ARES-200 can easily measure contact resistances of circuit breaker, shunt, disconnector by applying adjustable current from 1 A to 200 A.

SKU: ARES-200 Category:

ARES-200 is a micro-ohmmeter produced using advanced engineering technologies which can apply up to 200 A current. With its easy-to-use software, ARES-200 can easily measure contact resistances of circuit breaker, shunt and disconnector by applying adjustable current from 1A to 200A.

It can calculate the real values of the resistors by providing penetration with the feature of the continuous current application. ARES-200 can measure from 0.1 µ Ω to 5 Ω. ARES-200 is capable of measuring static resistance of the contact points of the circuit breaker. ARES-200 can measure idle circuit breakers as well as dual grounded circuit breakers. The optional current clamp will be able to measure the part of the current going through the ground line during the test and make the calculations considering this component.

There is also an “Auto-Test” mode available on ARES-200, which enables to start testing automatically just by connecting the leads of the sensor cables across the two points of the current path and makes it highly convenient when measuring an array of resistance values in a circuit breaker contact. The frequently used test models can be saved as templates and the tests can be performed more rapidly and quickly. Thanks to the quick test feature of the ARES-200 user interface, the test can be performed in barely 15 seconds.

The 4.3-inch touch colour display shows all measurement results manifest on a single screen. With an easy-to-use user-friendly interface, the ARES-200 guides operators to perform tests quickly. ARES-200’s flash memory feature allows controlling, recording and storing measurement results (up to 200 Test Records). And also the user can copy test records using a USB drive. Operators can easily print the measurement results with the 2.25-inch built-in printer of ARES-200 and can prepare on-field reports easily.

The HighTest data management platform (DMP Software) can also be used to control ARES-200 remotely by a PC and the measurement results can be easily analysed and stored in the PC. With the ARES-200’s Bluetooth option, tests can be started remotely via DMP software and the results can be transferred to the PC. Thus, on-field tests can be performed even by a single person.

With ARES-200’s temperature measurement channel, the temperature values of the measured sample can be taken and calculated according to the desired temperature value. ARES-200 is a compact, rugged device with IP67 protection class (case closed) which weighs 9 kg.

Why do we measure contact transition resistance at breakers?

When high current passes over the switchyard, circuit breakers open the circuits or at the points where high current passes it acts as closing switches. Resistance value measured in periodic control of circuit breaker should be the same as the resistance value in the closed position which is very important for system safety.

High resistance values may cause local hotspots, voltage drops, fire risk, unplanned power failure, and extra energy loss in the system. Maximum accuracy measurement with the 4-wire method (kelvin method) will indicate whether the breaker contacts are properly contacted, if there is any corrosion on the contacts, or it shows if there is an effect that increases the resistance.

ARES-200 can apply up to 200 A current through its current cable and measure the voltage drop on both sides of the resistance with the sense terminal. Thus the calculated resistance value displayed on ARES-200 is not affected by the resistance of the measuring cable.


  • Contact Resistance Measurement
  • Adjustable Current: 1 A to 200 A
  • Measurement Range from 0.1 µ Ω to 5 Ω
  • Typical Accuracy 0.1%
  • Static Resistance Measurement
  • Dual Ground Test mode
  • Auto-test mode
  • Built-in Printer
  • Optional Current Clamp
  • Internal Memory, USB Flash Drive
  • PC control via USB cable
  • Optional Bluetooth control & communication
  • 4.3-inch TFT touch Display
  • Protection Class: IP67 (case closed)

Technical Specifications

Measurement Parameter Contact Resistance
Measurement Modes Static Resistance & Dual ground
Test Current 1 A to 200 A
Measurement Range 0.1 µΩ to 5 Ω
Accuracy Typical: 0.1% ± 0.1% Fs 

Guaranteed: 0.5% ± 0.1% Fs

Display 4.3-inch TFT touch Display (visible under sunlight)
Memory Up to 200 records with 25 intervals for each
Communication USB 2.0/1.1 Standard-A, USB 2.0/1.1 Standard-B, Bluetooth (factory installed option)
PC Software DMP Software
Printer 2.25-inch Built-in Printer
Test Plan Up to 6 plans
Current Clamp Yes, Optional
Power Supply 100-240 V 47/63 Hz
Dimensions 16.7″ x 13.4″ x 6.8″  (424 mm x 340 mm x 173 mm )
Weight 9 kg
Operating and Storage temperature Working:   -10 °C to + 60 °C 

Storage:     -30 °C to 70 °C

Humidity 95% RH non-condensing
Protection Class IP67 (case closed)
Set of Package ARES-200, Power Cable, Ground Cable , 33 feet Standard Test Cable Set, USB Cable, Printer Paper (x2), USB flash drive, Instruction Manual (Soft Copy), DMP Software, Cable Bag
Options Hard Carrying Case, Length Customised Cables, Bluetooth (factory installed option), Current Clamp