MEGABRAS
ProductsMicro-ohmmetersPortable digital micro-ohmmeter up to 200 A
Micro-ohmímetro de 200A

Click to enlarge


Request a quote

Portable digital micro-ohmmeter up to 200 A

  • Alphanumerical display
  • Direct reading (Up to 4½ digits)
  • Resolution: 0.1 µΩ
  • Resistance reading: up to 20 mΩ
  • Kelvin-type (4-wires) measurement
  • Overheating Protection
  • Internal memory for up to 200 readings
  • Built-in printer
The MPK-203x high-current micro-ohmmeter is a portable,microprocessor-controlled instrument. Has optimized filters and protections for measurements in electrical substations. Can be used to accurately measure very low contact resistances of high voltage circuit-breakers and switches, busbars, etc., with test currents up to 200 A. It employs the 4 terminals-method (U/I measuring principle) to avoid errors caused by test leads and their contact resistances.

Measurement accuracy is guaranteed by a state-of-the-arts signal amplification system, offset-free and of high long-term stability. Resistances readings are shown in the alphanumeric display with up to 4½ digits-resolution. It allows to measure resistances up to 20 mΩ, and the best resolution is 0.1 μΩ.

Test current may be adjusted by the operator and his value is measured using an analogue indicator (bargraph).

It has an internal memory for up to 200 readings. The USB interface may be connected to a computer to download the stored values.

The high-current generation system is based on modern technology that allows to significantly decrease both its weight (approx. 11kg) and size. The cabinet is made of plastic material highly resistant to impacts and to environmental challenges. Internal thermal sensors in all sensitive components avoid any damage caused to the instrument due to overheating.

This is a strong but lightweight equipment, and may be easily carried by one person. It is water-resistant and can be used under severe weather conditions (IP54 with closed lid) offering an excellent performance working both in the laboratory and out in the field.

Test currents

100 A, 200 A (True DC).
The current may be continuously adjustable from 0 to 100%.

Resistence rangers

0-1999 µΩ (test current: up to 200 A ).
0-19,99 mΩ (test current: up to 100 A).

Reading resolution

0.1 µΩ for R < 2,000 µΩ.
1 µΩ for R < 20 mΩ.

Test voltage

3.5 Vcc @ 200 A.
4,5 Vcc @ 100 A.
5,8 Vcc (without load).

Maximum load resistance

10 mΩ @ 200 A.
30 mΩ @ 100 A.

Measurement Principle

Four-terminal, Kelvin-type.

Thermal protection

Protects all sensitive components, avoiding any damage due to overheating.

Continuous operation time

At 200 A this equipment may be used continuously for aprox. 1 minute before the thermal protection activates.
At 100 A this equipment may be used continuously for aprox. 15 minutes before the thermal protection activates.

Basic accuracy

± 0.5% of reading ± 2 digits.

Advanced features

Digital direct reading of very low resistances in the alphanumerical display, with up to 4½ digits. Very fast and accurate measurements.

Built memory

It allows the storage of 200 tests readings.

Interface

USB.

Enviromental

IP54 with closed lid.

Safety class

Meets the requirements of IEC 61010-1:1990, IEC 61010-1:1992 amendment 2.

Power supply

Mains: 220-240 V~.

Operating temperature range

-5°C to +50°C.

Storage temperature range

-25°C to +65°C.

Humidity range

95% UR (non condensing).

Equipment weight

Approx. 11 kg.

Dimension

502 x 394 x 190 mm.

Accessories weight

Approx. 20.5 kg.

Included accessories

2 Combined current and potential leads.
1 Power cord.
1 Ground cable.
1 USB cable.
1 Case for the accessories.
1 User guide.

Images for illustration purposes only. Megabras reserves the right to change design and specifications without prior notice.

Related documents

Datasheet

Contact

Request a quote
Support
Service Centers
E12072401