Description
The MPK215R 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 from 5 A 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.
The MPK215R has a cooling system that allows making a large number of consecutive tests without activation of thermal protection. Under normal ambient conditions (25 ºC) it can perform up to 30 consecutive tests with duration of 1 minute and 1 minute interval, time usually spent for repositioning the cables in another test point.
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 1 Ω, and the best resolution is 0.1 µΩ.
The high-current generation system is based on modern technology that allows to significantly decrease both its weight (approx. 11 kg) 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 (IP65 with closed lid) offering an excellent performance working both in the laboratory and out in the field.
Technical specifications
Test current
From 5 A up to 200 A (True DC)
The test current can be adjusted in steps of 0.2 A from 5 A to 20 A and steps of 1 A from 20 A to 200 A.
Resistance ranges
0.1 μΩ up to 2 mΩ (0.1 μΩ resolution).
2 mΩ up to 200 mΩ (10 μΩ resolution).
200 mΩ up to 1 Ω (1 mΩ resolution).
Measurement principle
Four-terminal, U/I.
Protections
Protections against overheating, overcurrent and short-circuit.
Programmable test time
Allows to setup the test duration from 15 seconds up to 120 seconds for current test from 5 A up to 200 A.
Allows unlimited test duration for currents equal or lower than 100 A.
Basic accuracy
± 1 % of reading from 50 μΩ to 1 Ω.
Auxiliary clamp measurement range
0.1 ADC to 60 ADC.
Auxiliary clamp reading accuracy
1 % + 3 digits.
Advanced features
Digital direct reading of very low resistances in the alphanumerical display, with up to 4½ digits. Very fast and accurate measurements.
Communication protocol
Modbus.
Built-in memory
Memory for storing up to 4000 readings organized by records.
Serial data output
USB, for configuration, control and download the stored values.
Bluetooth
For configuration and control.
Environmental protection
IP65 (with closed lid).
Safety
In accordance with IEC 61010-1.
Power supply
Mains: 100-240 V~.
Operating temperature
14 °F to 122 °F (-10 °C to 50 °C).
Storage temperature
-13 °F to 158 °F (-25°C to 70°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).
