RMO-G series of Micro Ohmmeters (hereafter referred to as “RMO-G”) contain 7 models: RMO100G, RMO200G, RMO300G, RMO400G, RMO500G, RMO600G and RMO800G.The main difference between these models is the maximum test current that can be generated
Ingress protection rating: IP67*with closed lid
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
Gas Isolated Switchgears (GIS)
High-current bus bar joints
Cable splices
Welding joints
Fuses
System Overview:
RMO-G generates a true DC ripple-free current with automatically regulated test ramps. During a test the RMO-G ramps with increasing current before measuring and decreasing current after the measurement. This eliminates magnetic transients.
The RMO-G 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-G 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-G 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
Test plans
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
Power consumption:
RMO100G: 1190 VA@ 230 V AC; 1130 VA@115 V AC
RMO200G: 1815 VA@ 230 V AC; 1810 VA@115 V AC
RMO300G: 2400 VA@ 230 V AC; 2115 VA@115 V AC
RMO400G: 3570 VA@ 230 V AC; 2710 VA@115 V AC
RMO500G: 3970 VA@ 230 V AC; 3920 VA@115 V AC
RMO600G: 4720 VA@ 230 V AC; 4145 VA@115 V AC
RMO800G: 5010 VA@ 230V AC; 3510 VA@115 V AC
Fuse:
RMO100G & RMO200G: F type, 12A/230V
RMO300G & RMO400G: F type, 15A/230V
RMO500G & RMO600G: F type, 20A/250V
RMO800G: F type, 20A/250V
Output data:
Test current ranges and load intervals (Model/Test Current/Test Duration):
RMO100G: 100A, 30min
RMO200G: 200A, 150s
RMO300G: 300A, 60s
RMO400G: 400A, 60s@300A
RMO500G: 500A, 30s
RMO600G: 600A, 20s
RMO800G: 800A, *5s
Full Load Voltages at maximum current:
RMO100G: 7.15V@ 230 V AC; 6.80V@ 115 V AC
RMO200G: 6.80V@ 230 V AC; 5.90V@ 115 V AC
RMO300G: 6.00V@ 230 V AC; 4.80V@ 115 V AC
RMO400G: 6.70V@ 230 V AC; 4.40V@ 115 V AC
RMO500G: 5.95V@ 230 V AC; 5.10V@ 115 V AC
RMO600G: 5.90V@ 230 V AC; 3.80V@ 115 V AC
RMO800G: 4.70V@ 230 V AC; 2.85V@ 115 V AC
Measurement:
Resistance range:
RMO100-RMO600G: 0,1 μΩ – 999,9 mΩ* (*expandable up to 6 Ω)
RMO800G: 0,1 μΩ – 499,9 mΩ
Resolution:
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)
Display:
LCD screen 20 characters by 4 lines;
LCD display with backlight, visible in bright sunlight.
Interface:
RMO-G is equipped with an USB port
optional: RS232 (connection to an external computer)
optional: Bluetooth communication interface
Printer (optional):
Thermal printer
Paper width 80 mm / 3.2 in
Environmental protection: Ingress protection rating: IP67*with closed lid
Applicable Standards
Installation/overvoltage: category II
Pollution: degree 2
Safety: Directive 2014/35/EU (CE conform), Applicable standards, for a class I instrument: 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.