Contact Resistance Micro-ohm Meter

Product Details:

• Lightweight meters that directly measures & displays micro-ohm values
• Works reliably in live EHV switchyards up to 765 kV
• Typically used for contact resistance of circuit breakers, isolators, bus bar joints, earth switch joints etc.
• 100A / 200A DC injection
• Uses Kelvin's 4 wire measurement principle
• Direct readout of test current and micro-ohms on display
• Easy to connect and use
• Battery operated
• Simple operation
• Tests can be conducted even by technicians
• Inbuilt memory
• Auto Ranging
• PC downloading & analysis including trend analysis possible with C data CRM software
• Inbuilt real time clock, memory, and printer
• Test time stamping on each record enables time references for future use
• Report can be generated in software and cab be exported to PDF or Microsoft excel
• Enclosed in ultra-rugged IP67 class hard molded case
• All models are supplied with rugged calibrated test lead suitable for 4 wire measurement
• The instrument is supplied with CData CRM software CD, calibration certificate, Accessories and test lead suitable for testing of EHV class circuit breaker

Additional Information:

• Item Code: CRM-200B-Plus

Product Details:

• Compact design
• High accuracy
• Trouble-free functionality
• Resistance Range: 199.9 µΩ, 1999 µΩ & 19.99 mΩ
• Best Resolution: 0.1 µΩ, 1 µΩ & 0.01 mΩ
• Accuracy: Value ± 1 % ± 1 Digit
• Display: Two Nos, 3½ Digit, ½ Inch LCD for Resistance & Current Display
• Power Supply: 230 V AC ± 15 %, 50 Hz ± 10 %, 1 Phase
• Inbuilt Battery: 2 Nos, 6 V – 4.5 AH, Rechargeable

Additional Information:

• Item Code: CRM-200B

Product Details:

• Current (DC): 100 A, 50 A, 20 A & 10 A - Selectable
• Resistance Range: 199.9 µΩ, 1999 µΩ, 19.99 mΩ, 199.9 mΩ, & 1999 mΩ, - Selectable
• Best Resolution: 0.1 µΩ, 1 µΩ, 0.01 mΩ, 0.1 mΩ, & 1 mΩ, - Selectable
• Accuracy: Value ± 0.5 % ± 5 Digit
• Display: 4 Line, 20 Character Backlit LCD
• Power Supply: 230 V AC ± 15 %, 50 Hz ± 10 %, 1 Phase

Additional Information:

• Item Code: CRM-100C

Product Details:

• Compact design
• Inbuilt thermal printer
• High accuracy
• Trouble-free functionality
• Battery Operated
• Current (DC): 100A plus. Peak Test Current will be decided by the load resistance, however, 100A minimum is guaranteed
• Resistance Range: 0 - 200μΩ, 2000μΩ, 20mΩ; Autoranging
• Best Resolution: 0.1 μΩ, 1 μΩ & 10 μΩ on above Ranges
• Accuracy: Value ± 2% ± 1 Digit
• Display: 4 Line X 20 character LCD. 3 ½ digit display for Test Current & Resistance
• Power Supply: Input to Battery Charger - 90 to 275 VAC, 50/60 Hz ± 10%;100 to 300 VDC Charger output - 13.5 VDC, 1500 mA Max

Additional Information:

• Item Code: CRM100Bplus

Product Details:

• Technically advanced
• Uses Kelvin four wire measurement principle
• Long lasting
• Current (DC): 100 A
• Resistance Range: 199.9 μΩ & 1999 μΩ
• Best Resolution: 0.1 µΩ & 1 μΩ
• Accuracy: Value ± 2 % ± 1 Digit
• Display: Two Nos, 3½ Digit, ½ Inch LCD for Resistance & Current Display
• Power Supply: 230V AC ± 15 %, 50 Hz ± 10 %, 1 Phase

Additional Information:

• Item Code: CRM-100

Product Details:

• Housed in rugged case
• Flexibility to test objects
• Convinced optimized design
• Resistance Range: 199.9 µΩ, 1999 µΩ & 19.99 mΩ,
• Best Resolution: 0.1 µΩ, 1 µΩ & 0.01 mΩ,
• Accuracy: Value ± 1 % ± 1 Digit
• Display: Two Nos, 3½ Digit, ½ Inch LCD for Resistance & Current Display
• Power Supply: 230 V AC ± 15 %, 50 Hz ± 10 %, 1 Phase

Additional Information:

• Item Code: CRM-200

Product Details:

• Can measure DC winding resistance of large rotating machines, highly inductive test objects like Transformer, Generators, and Motors etc.
• 50 A DC current makes it possible to measure low resistances with high accuracy.
• One time connection to either all windings of primary and/or secondary. Simultaneous measurement reduces connection and measurement time.
• Change in winding resistance, short or open windings can be detected from measured values.
• Automatic temperature measurement and temperature corrected value calculation.

• TRM 50/ TRM 50+ -
• No of Channels 3/6 Current Channels, 3/6 Voltage Channels, 1 temperature Channel
• Connections One-time connection to primary or secondary winding of transformer
• Current Ranges 50A, 40A, 25A, 10A, 5A, 1A, 100mA, 10mA
• Resistance Ranges Up to 2000 (Auto-ranging)
• Resolution 4 1/2 digit
• Accuracy Value +- 0.5% +- 5 counts
• Open Circuit Voltage 50 V
• Demagnetization Facility Yes
• Display 5.7" TFT display with touch screen
• Printer 58 mm, Inbuilt thermal printer
• Communication Port Ethernet for PC communication
• Data Port USB for external memory stick connection
• External Control Possible via Notebook PC through Ethernet port and software
• Temperature measurement Range 0 to 100 deg, Accuracy +- 1 deg, Resolution 0.1deg
• Temperature correction For Aluminium Copper
• Temperature Input Channel Compatible to accept RTD input
• User Interface Resistive touch screen
• Back EMF Protection Yes. Automatic protection after measurement and during accidental disconnection of the current path. Protection operates even if Mains supply fails.
• Discharge Facility Indication Automatic Discharge of DUT messages on screen
• Tap Changer Test Detects discontinuity during tap changer test
• OLTC Test Facility (Optional) OLTC test facility with current v/s time graph, Single or Three Phases simultaneously. Available in control through PC option only.
• OLTC current Ranges 50A, 40A, 25A, 10A, 5A
• Indications Polarity reversal, Test connection continuity, and discharge
• Diagnostics Check At power On instrument does self-check of channels and shows the message
• Test Leads Measuring leads, AC supply, earth leads and temperature sensor lead
• Operating Environment -10 DegreeC to 50 DegreeC, 95% RH (non-condensing)
• Heat Run test Yes
• Delta connection Measurement Values of each arm of delta winding is calculated and displayed
• One side earthing Instrument is able to do the measurement with one side earthing (with Neutral earthing)
• Input Supply 110V AC +-15% 50/60 Hz +-10% Or 220V AC +-15% 50/60 Hz +-10%.

Additional Information:

• Item Code: TRM-50