連續電流微型歐姆計
Continuous Current Micro-Ohmmeter RMO-C Series 型號：RMO-C Series-
RMO-C系列的連續電流微型歐姆計是DV Power微歐姆計中功能最強大的系列，除了輸出能力增強，在200 A直流測試電流下測試時間不受限制。RMO300C和RMO500C型號還可以在10分鐘內產生300A電流。
RMO-C是為非電感測試對象的接觸電阻測量和有更高安全要求的應用而設計的。它可以測試中/高壓斷路器、隔離開關、大電流匯流排接頭、電纜接頭和不同的大電流鏈接頭。由於雙接地和遠端遙控功能，該儀器即使在最苛刻的環境下也能準確測量，為測試人員提供額外的安全。
測試單元是被放置在一個牢不可破的塑料外殼中，具有 IP67 防護等級（當蓋子閉合時）。雖然非常便於攜帶和輕巧，但RMO-C微歐姆計具有非常高的輸出功率能力。高輸出電壓使得在更高的測試電流下有更大的測量範圍。因此，使得它可以使用更細/更長的測試電纜。RMO-C 可產生真正的直流無漣波（小於 1% 漣波）電流，並帶有自動調節的測試斜坡。在測試期間，它在測量前增加電流，測量後減少電流，可顯著降低了磁瞬變並確保了極高的準確性。
當在雙接地測試條件下，特殊的電流鉗會測量通過接地的電流。同時，裝置本身會為這些夾具供電。 如果需要更高的安全級別，遠端遙控功能使操作人員能更夠從遠處進行測量。
RMO-C所提供的內建記憶體可儲存多達500個測量值。另有用以隨身碟方式儲存的方式作為選擇。另一個特點是內建高精度模組，適合測量非常低的電阻值，範圍從1到30 µΩ，解析度為0.01 µΩ。
提供免費的DV Win軟體 ，通過USB埠與RMO-C微歐姆計進行通訊。它允許用戶從PC上遠端測試。此外，用戶可以通過該軟體下載測試結果，對其進行分析，並產生可自定義的測試報告格式。
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Mains power supply
- Connection according to IEC/EN60320-1; C320
- Mains supply: 90 V – 264 V AC
- Frequency: 50 / 60 Hz
- Circuit Breaker with thermal overload protection:20A / 240V AC
- Designed according to UL 1077 standard (Supplementary Protectors for Use in Electrical Equipment)
- For primary protection of the electrical panel, a circuit breaker according to the UL 489 standard shall be used
Output data
Test current ranges
(from 0 to Imax)：Model Current Max. load capacity RMO200C 200 A Continuous RMO300C 300 A 10 min RMO500C 500 A 30 s Full Load Voltages： Main supply voltage Output current Maximum ouput voltage 230 V AC 300 A
200 A8,2 V DC
8,6 V DC115 V AC 300 A
200 A7,2 V DC
7,5 V DCMeasurement Resistance range：0,1 µΩ – 999,9 mΩ *expandable up to 6 Ω Resolution: - 0,01 - 99.99 µΩ 0,01 µΩ
- 100,0 - 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 sunlight.
Interface
- USB / RS232 port (to an external PC)
- Bluetooth communication (optional)
Test result storage
- Up to 500 measurements in internal memory
- USB flash drive port for additional results storage
Dimensions and Weight
- Dimensions (W x H x D)：503 x 406 x 193 mm / 19.8 x 15.9 x 7.6 in
- Weight: 14,6 kg / 32.1 lbs
Environmental protection Ingress protection rating: IP67 *with closed lid Environmental conditions - Operating temperature：-20 ºC - +55 ºC / -4 ºF - +131 ºF
- Storage & transportation：-40 ºC - +70 ºC / -40 ºF - +158 ºF
- Relative humidity 0 - 95%, non-condensing
- Altitude: up to 2000 m
Applicable Standards
- Installation/overvoltage: category II
- Pollution: degree 2
- Low Voltage Directive: 2014/35/EU (CE conform)， EN 61010-1
- EMC Directive 2014/30/EU (CE conform) (Former 2004/108/EC) Applicable standard: IEC/EN 61326-1
- CAN/CSA-C22.2 No.61010-1，2nd edition，including Amendment 1
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The continuous current micro-ohmmeter RMO-C is the most powerful series of DV Power micro-ohmmeters with increased output capabilities and unlimited test duration at 200 A DC test current. RMO300C and RMO500C models can also generate 300 A current during 10 min.
RMO-C is designed for contact resistance measurement of non-inductive test objects and applications with increased safety requirements. It tests medium and high-voltage circuit breakers, disconnecting switches, high-current bus bar joints, cable splices, and different high-current links. Due to Both Sides Grounded and Remote Control functionalities, the instrument accurately measures even in the most demanding environments, providing additional safety to testing personnel.
The instruments are placed in an unbreakable plastic case with an IP67 protective rating (with a closed lid). Although very portable and lightweight, RMO-C micro-ohmmeters have very high output power capabilities. High output voltage enables a wider measurement range at higher test currents. Consequently, it enables the usage of thinner/longer test cables. RMO-C generates a true DC ripple-free (less than 1 % ripple) current with automatically regulated test ramps. During the testing, it increases current before measuring and decreases current after the measurement. This significantly decreases magnetic transients and ensures great accuracy.
Special current clamps measure a current through groundings when the instrument tests in BSG conditions. The instrument itself powers these clamps. If an even higher safety level is required, the Remote Control feature enables the operator to perform measurements from distant locations.
RMO-C instruments can store up to 500 measurements in internal memory. Also, they have a USB flash drive available as an option. An additional feature is the built-in High Precision module suitable for measurement of very low resistance values, in the range from 1 to 30 µΩ, with 0,01 µΩ resolution.
Our free DV Win software communicates with the RMO-C micro-ohmmeters via a USB interface. It allows a user to run the test remotely from a PC. Also, a user can download test results, analyze them, and generate fully configurable test reports through the software.
-
Mains power supply
- Connection according to IEC/EN60320-1; C320
- Mains supply: 90 V – 264 V AC
- Frequency: 50 / 60 Hz
- Circuit Breaker with thermal overload protection:20A / 240V AC
- Designed according to UL 1077 standard (Supplementary Protectors for Use in Electrical Equipment)
- For primary protection of the electrical panel, a circuit breaker according to the UL 489 standard shall be used
Output data
Test current ranges
(from 0 to Imax)：Model Current Max. load capacity RMO200C 200 A Continuous RMO300C 300 A 10 min RMO500C 500 A 30 s Full Load Voltages： Main supply voltage Output current Maximum ouput voltage 230 V AC 300 A
200 A8,2 V DC
8,6 V DC115 V AC 300 A
200 A7,2 V DC
7,5 V DCMeasurement Resistance range：0,1 µΩ – 999,9 mΩ *expandable up to 6 Ω Resolution: - 0,01 - 99.99 µΩ 0,01 µΩ
- 100,0 - 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 sunlight.
Interface
- USB / RS232 port (to an external PC)
- Bluetooth communication (optional)
Test result storage
- Up to 500 measurements in internal memory
- USB flash drive port for additional results storage
Dimensions and Weight
- Dimensions (W x H x D)：503 x 406 x 193 mm / 19.8 x 15.9 x 7.6 in
- Weight: 14,6 kg / 32.1 lbs
Environmental protection Ingress protection rating: IP67 *with closed lid Environmental conditions - Operating temperature：-20 ºC - +55 ºC / -4 ºF - +131 ºF
- Storage & transportation：-40 ºC - +70 ºC / -40 ºF - +158 ºF
- Relative humidity 0 - 95%, non-condensing
- Altitude: up to 2000 m
Applicable Standards
- Installation/overvoltage: category II
- Pollution: degree 2
- Low Voltage Directive: 2014/35/EU (CE conform)， EN 61010-1
- EMC Directive 2014/30/EU (CE conform) (Former 2004/108/EC) Applicable standard: IEC/EN 61326-1
- CAN/CSA-C22.2 No.61010-1，2nd edition，including Amendment 1