Microohmmeter MPK-105R

Highlights

• 100 A Low-Resistance-Meter
• Direct reading 4 ½ digits
• Resolution: 0.1 µOhm
• Resistance reading up to 300 mOhm
• Powered by internal battery or main
• Overheating protection
• USB Port
• Bluetooth for configuration and control
• Protection IP54

The MPK105R high-current micro-ohmmeter is a portable, microprocessor-controlled instrument. It has optimized filters and protections for measurements in electrical substations and can be used to accurately measure very low contact resistances of high voltage circuit-breakers and switches, busbars, etc., with test currents up to 100 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-art 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 300 mΩ, and the best resolution is 0.1 μΩ. Test current may be adjusted by the operator and his value is measured using an analog indicator (bargraph). It has an internal memory for up to 50 registers with 80 readings each. The serial data output (USB) 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 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 CURRENT

• Up to 100 A (True DC)
• The current may be continuously adjustable from 10% to 100% in 1 A steps

RESISTANCE RANGES

• From 0.1 μΩ up to 300 mΩ

MEASUREMENT PRINCIPLE

• Four-terminal, U/I

PROTECTIONS

• Overcurrent, short-circuit and overheating

PROGRAMMABLE TEST TIME

• Allows to setup the test time from 5 seconds up to 120 seconds

BASIC ACCURACY

• ± 1 % of reading ± 1 digit

ADVANCED FEATURES

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

BUILT-IN PRINTER

• Allows print the measured values

BUILT-IN MEMORY

• Capacity to store 50 registers with 80 readings each

SERIAL DATA OUTPUT

• USB

BLUETOOTH

• For configuration and control

ST-LOGGER SOFTWARE

• Friendly, easy to use software
• With automatic report generator, including the operator's commentaries

ENVIRONMENTAL PROTECTION

• IP54 (with closed lid)

SAFETY CLASS

• Meets the requirements of IEC 61010-1

POWER SUPPLY

• Mains: 90-240 V~ 50/60 Hz

OPERATING TEMPERATURE RANGE

• 23°F to 122°F (-5°C to 50°C)

STORAGE TEMPERATURE RANGE

• 14°F to 140°F (-10°C to 60°C)

HUMIDITY RANGE

• 95 % RH (non condensing)

EQUIPMENT WEIGHT

• Approx. 24.25 lb (11 kg)

DIMENSIONS

• 19.76" x 15.51" x 7.48" (502 x 394 x 190 mm)

INCLUDED ACCESSORIES

• 2 Combined current and potential leads
• 1 Power cord
• 1 Ground cable
• 1 USB cable
• 1 Case for the accessories
• 1 License to use the software ST-Logger
• 1 User guide

ACCESSORIES WEIGHT

• Approx. 45.19 lb (20.5 kg)