Three separate test modes: SINGLE / CONTIN / DTRtest modes
Mechanical protection IP43
RMO-A series contain 6 models of powerful and lightweight micro ohmmeters: RMO100A, RMO200A, RMO300A, RMO400A, RMO500A and RMO600A. The main difference between these models is the maximum test current that can be generated.
Application：Typical application is measuring resistance of non-inductive test objects:
High, middle and low voltage circuit breakers (live and dead tank)
High, middle and low voltage disconnecting switches
High-current bus bar joints
RMO-A generates a true DC ripple-free current with automatically regulated test ramps. During a test the RMO-A ramps with increasing current before measuring and decreasing current after the measurement. This eliminates magnetic transients.
The RMO-A instrument can store internally up to 500 measurements. All measurements are time and date stamped.
Using the DV-Win software a test can be performed from a user’s PC, and the results can be obtained directly on the PC.
Communication between the RMO-A and a PC is through an USB (as standard) or an RS232 cable (as an option). Bluetooth communication interface is also available as an option.
Using the DV-Win the result can be arranged as an Excel spread-sheet which can be later shown as a diagram and printed for a report.
The set is equipped with a thermal and an overcurrent protection. The RMO-A has a very high ability to cancel electrostatic and electro-magnetic interference in HV electric fields. It is achieved by very efficient filtration. The filtration is made utilizing a proprietary hardware and software.
DV-Win Software (*included in the purchase price):
Full control of the device in test
Test raports available in several formats
Several filters for results download to a PC
Sampling time feature for CONTIN mode
Detailed Help menu
Mains power supply
Connection according to IEC/EN60320-1; C320
Mains supply: 90 V – 264 V AC
Frequency: 50 / 60 Hz
RMO100A: 1210 VA@ 230 V AC; 1150 VA@ 115 V AC
RMO200A: 1890 VA@ 230 V AC; 1880 VA@ 115 V AC
RMO300A: 2360 VA@ 230 V AC; 2170 VA@ 115 V AC
RMO400A: 3520 VA@ 230 V AC; 2650 VA@ 115 V AC
RMO500A: 3930 VA@ 230 V AC; 3850 VA@ 115 V AC
RMO600A: 4560 VA@ 230 V AC; 4040 VA@ 115 V AC
RMO100A&RMO200A: F type, 12A/250V
RMO300A&RMO400A: F type, 15A/250V
RMO500A&RMO600A: F type, 20A/250V
Test current ranges and load intervals (Model/Test Current/Test Duration):
RMO100A: 100A, 300s
RMO200A: 200A, 150s
RMO300A: 300A, 60s
RMO400A: 400A, 60s@300A
RMO500A: 500A, 30s
RMO600A: 600A, 20s
Open circuit voltage: 10 V DC ± 2%
Full Load Voltages at maximum current:
RMO100A: 7.25V@ 230 V AC; 6.9V@ 115 V AC
RMO200A: 7.10V@ 230 V AC; 6.10V@ 115 V AC
RMO300A: 5.90V@ 230 V AC; 4.70V@ 115 V AC
RMO400A: 6.60V@ 230 V AC; 4.30V@ 115 V AC
RMO500A: 5.90V@ 230 V AC; 5.00V@ 115 V AC
RMO600A: 5.70V@ 230 V AC; 3.70V@ 115 V AC
Resistance range: 0,1 μΩ – 999,9 mΩ* (*expandable from 0 Ω up to 6 Ω)
0,1 μΩ - 999,9 μΩ: 0,1 μΩ
1,000 mΩ - 9,999 mΩ: 1 μΩ
10,00 mΩ - 99,99 mΩ: 10 μΩ
100,0 mΩ - 999,9 mΩ: 0,1 mΩ
*1,000 Ω – 6,000 Ω: 1 mΩ
Typical accuracy ± (0,1 % rdg + 0,1 % FS)
LCD screen 20 characters by 4 lines;
LCD display with backlight, visible in bright sunlight.
RMO-A is equipped with an USB port
optional: RS232 (connection to an external computer)
optional: Bluetooth communication interface
Installation/overvoltage: category II
Pollution: degree 2
Safety: Directive 2014/35/EU (CE conform), Applicable standards, for a class I instrument, pollution degree 2, Installation category II: IEC EN 61010-1
EMC: Directive 2014/30/EU (CE conform), Applicable standard: EN 61326-1
CAN/CSA-C22.2 No. 61010-1, 2nd edition, including Amendment 1
Please feel free to contact for detailed specifications, accessories, software and options.