Description
Raytech Digital Micro ohm meter, Micro Junior 2, was designed for high degree of accuracy to measure very low resistances. It is battery operated with a lithium-ion battery that allows over 2000 test measurements with 10A output without recharging.
The MJ-2 is a high precision, fully automatic, microprocessor based system. This system is designed for highly accurate readings on-site with laboratory precision.
The MJ-2 applies a preset current level, selected by the user. The results of the test are displayed within a few seconds automatically. The results are reported on the easy to read liquid crystal display and can be stored or printed out.
The Micro Junior 2 is one of the most lightweight systems available that comes complete with its own rugged waterproof Fieldcase.
Features
- Large LCD display with back light
- Automatic measurements of low resistance from 0.00µΩ ... 400kΩ
- Microprocessor based system with internal storage for over 2000 test results
- built in panel-mount printer
- Automatic current reversal mode for highest accuracy
- Lithium Battery power source
- Runs for more than 5 hours continuous at 10 amps
- Single push button operation
- Response time less than 2 seconds
- Single or continuous measurements with automatic data storage
- User can preset a number of tests, at various timed intervals, for automatic data storage
- Printing and storage of test results while the test system is measuring
- Complete automatic calibration system and system diagnostics
- Standard centronics (parallel) interface and RS232 (serial) interface
- Pure filtered DC power source for the highest accuracy readings
- Cable length correction for Cable Manufacturer
- Lightweight and portable, less than 5.9kg (13Lbs.)
- 2 Year standard warranty
Specifications

Model:
Micro Junior 2
Size:
L: 410 mm (16.1”) W: 337 mm (13.3”) H: 178 mm (7”)
Weight:
5.9 kg (13 lbs.)
Power:
Lithium-Ion battery, 16.4V / 6Ah
Test current user selectable:
10, 1, 0.1, 0.01, 0.001 A DC
Display:
LCD graphic with back light
Front panel:
sealed, anodized with a multi-actuation rotary knob
Interface:
9 Pin RS232 serial
Internal panel:
mount printer
Memory storage:
Internally stores up to 2 000 test results
Operating temperature:
-10ºC to +60° C
Storage temperature:
-20°C to +70°C
See Instruction Manual for more Parameters.
Specifications are subject to change without notice.
Accuracy

Measurement Parameters
Current range
Measuring range
Accuracy
Resolution
10 A F/R*
0.00 µΩ ...40 mΩ
± 0.1% Rdg ± 0.1 µΩ
5 Digits or 0.01 µΩ
10 A
0.0 µΩ ... 40 mΩ
± 0.1% Rdg ± 1 µΩ
5 Digits or 0.1 µΩ
1 A F/R*
0.0 µΩ ... 1 Ω
± 0.1% Rdg ± 1 µΩ
5 Digits or 0.1 µΩ
1 A
0.000 mΩ ... 1 Ω
± 0.1% Rdg ± 10 µΩ
5 Digits or 0.001 mΩ
0.1 A
0.00 mΩ ... 10 Ω
± 0.1% Rdg ± 0.1 mΩ
5 Digits or 0.01 mΩ
10 mA
0.0 mΩ ... 400 Ω
± 0.1% Rdg ± 1 mΩ
5 Digits or 0.1 mΩ
1 mA
0.0 Ω ... 40 kΩ
± 0.1% Rdg ± 0.1 Ω
5 Digits or 0.1 Ω
< 1 mA
40 kΩ ... 400 kΩ
± 1% Rdg
4 Digits
* F/R = automatic Forward / Reverse current measurements
Resistance range:
0.00µΩ to 400kΩ
Firmware Micro Junior 2
Firmware
2.38
27.04.2020
This is the newest Firmware for the Micro Junior 2
With the FlashLoader3.exe and a RS232 serial cable you can update the Firmware.
recommended
Flyer Micro Junior 2
Flyer
3.02
26.04.2020
Short overview about the Micro Junior 2
Instruction Manual Micro Junior 2
Instruction Manual
2.11
26.04.2020
This is the instruction manual for the Micro Junior 2
Command Set Micro Junior 2
Command Set
2.24
26.04.2020
This is a description how you can remote control the Micro Junior 2 over the serial interface.
Leaflet Temperature Probe TP 01
Leaflet
1.00
27.04.2020
This is a short description about the Temperature Probe TP 01 with technical specification.