RMO-D series of Micro Ohmmeters (hereafter referred to as “RMO-D”) contain 3 models: RMO200D, RMO500D and RMO600D.
All RMO-D models are based on a state of the art technology, using the most advanced switch mode technique available today. The main difference between these models is the maximum test current that can be generated (200 A for RMO200D, 500 A for RMO500D and 600 A for RMO600D model).
RMO-D generates a true DC ripple-free current with automatically regulated test ramps. During a test the RMO-D ramps its output with increasing current before taking measurement and decreasing current after the measurement. This eliminates magnetic transients.
The RMO-D 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 PC and the results can be obtained directly on the PC. Communication between the RMO-D and a PC is through an USB (as standard) or an RS232 cable (as an option). Using the DV-Win the result can be arranged as an Excel spreadsheet which can be later presented in a graphic form and printed for a report.
The set is equipped with a thermal and an overcurrent protection. The RMO-D has a very high ability to cancel electrostatic and electromagnetic interference in HV electric fields. It is achieved by very efficient filtration. The filtration is made utilizing a proprietary hardware and software.
The RMO-D instrument has four separate test modes:
SINGLE mode
CONTIN mode
BSG mode (Both Sides Grounded)
DTRtest mode (Dead Tank Resistance)
The DEMAGNETIZATION feature enables for full automatic demagnetization of a current transformer core after the measurement.
Mains power supply
Connection according to IEC/EN60320-1; C320
Mains supply: 90 V – 264 V AC
Frequency: 50 / 60 Hz
Power consumption
Model @ 230 V AC @ 115 V AC
RMO200D 1785 VA 1770 VA
RMO500D 3865 VA 3615 VA
RMO600D 4560 VA 3925 VA
Fuse: type F
RMO200D 12 A / 250 V
RMO500D & RMO600D 20 A / 250 V
Output data
Test current ranges and load intervals:
Model Test current Test duration
RMO200D 200 A 150 s
RMO500D 500 A 30 s
RMO600D 600 A 20 s
Full Load Voltages at maximum current
Model @ 230 V AC @ 115 V AC
RMO200D 6,7 V 5,8 V
RMO500D 5,8 V 4,7 V
RMO600D 5,7 V 3,6 V
Measurement
Resistance range: 0,1 µΩ – 999,9 mΩ
Resolution
0,01 µΩ – 99,99 µΩ 0,01 µΩ
100,0 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
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-D is equipped with an USB port
optional: RS232 (connection to an external computer)
optional: Bluetooth communication interface
Test Result Storage
RMO-D can store up to 500 measurements
Printer (optional)
Thermal printer
Paper width 80 mm / 3.2 in
Dimensions and weight
Model Weight（kg / lbs） Dimensions (W x H x D) (mm / in)
RMO200D 9 kg / 20 lbs 405 x 165 x 330 / 7.8 x 10 x 15
*RMO200D in version without built-in thermal printe
RMO500D 12 kg / 26,5 lbs 480 x 190 x 385 / 18.9 x 7.48 x 15.16
RMO600D 12 kg / 26,5 lbs *RMO500D/RMO600D and RMO200D in version with built-in thermal printer
Environmental protection
Ingress protection rating: IP67*with closed lid
Environmental conditions
Operating temperature: -10 ºC - +55 ºC / +14 ºF - +131 ºF
Storage & transportation: -40 ºC - +70 ºC / -40 ºF - +158 ºF
Humidity 5 % - 95 % relative humidity
Applicable Standards
Installation/overvoltage: category II
Pollution: degree 2
Safety: LVD 1006/95/EC (CE Conform) EN 61010-1
EMC: Directive 1004/108/EC (CE Conform) Standard EN 61326-1:1006
CAN/CSA-C22.2 No.61010-1, 2nd edition, including Amendment 1
Warranty : 3 Years
