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Ohmmeters
measure the electrical resistance of a conductor.
See Also: Micro Ohmmeters, Teraohm Meters, Megohmmeters, Microhmmeters
- Valhalla Scientific Inc.
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Digital Igniter Tester
Alpha 4314
The Alpha 4314 Digital Igniter Tester is a portable digital ohmmeter which has been specifically designed for ultra-safe resistance testing on explosive devices (i.e. squibs, detonators).
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RF Milliwatt Meters
Type NDB-2 and NDB-3
National RF’s Type NDB-2 and NDB-3 RF Milliwatt Meters are affordable pieces of test equipment for both the RF laboratory and the home experimenter. Both provide a digital reading of RF power in dB reference 1 milliwatt of power into a 50 ohm load (i.e. 0 dBm). The circuitry consists of a low noise logarithmic amplifier that drives a digital A/D converting meter circuit. The lowest power levels that can be read are about –73 dBm (approximately 40 microvolts or .00000003 milliwatts). The maximum power input should not exceed 10 milliwatts (+10 dBm or .010 watts) when inputed without attenuation. An internal attenuator is provided and described in the next section.
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Three-Phase Transformer Winding Resistance Meters
TWA Advanced Series
TWA Advanced series is the latest DV Power solution for three-phase transformer winding resistance measurement and tap changer analysis. They are capable of testing six transformer windings with a single cable connection, as well as three-phase automatic transformer demagnetization. It has the option of the automated test mode, where the instrument operates the tap changer without operator input (minimizing the risk of human error) and records winding resistance results based on pre-selected stabilization criteria.The unique DVtest method of tap changer analysis enables checking the moving contacts of on-load tap changers during the transition, measuring the transition time, detecting open circuits, and many other types of faults. It is performed with 0.1 ms sampling rate, together with the measurement of tap changer motor current which detects motor and mechanical issues. A special proprietary algorithm is used for testing tap changers connected through a built-in series (booster) transformer. The DVtest can be performed either on one phase or simultaneously on three phases. It can also be performed together with the winding resistance test in all tap positions.A unique advantage of TWA Advanced instruments is the capability of simultaneously testing the winding resistance of all three phases of a three-phase transformer connected in a YN configuration. This can significantly speed up the testing– for example, it enables the operator to perform 33 measurements instead of 99 on a tap changer with 33 tap positions.TWA500 is equipped with a large 10.1” graphical touch-screen display, while TWA400 has a 7” graphical touch-screen display. Besides making the interface much more user-friendly compared to older winding ohmmeters, it also enables certain test options that were previously available only with DV-Win software. The most important among them are DVtest, tap changer motor current measurement, “Heat Run” test, test templates, and automatic test mode.
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Bonding Ohmeters
bonding ohmmeter is an affordable, highly accurate, and intrinsically safe electrical bond tester. This meter is capable of performing bond measurements on a variety of components and metal-to-metal connections. The 620LK has been independently UL-913 certified, ensuring quality and safety at each step of manufacturing. Due to its safety certifications and high level of accuracy, the 620LK meter is the choice bond tester for many commercial airliners, while its sibling the 620UK-B is in countless USAF programs.
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Transformer Resistance Testing
Weshine Electric Manufacturing Co., Ltd
Transformer insulation resistance deterioration is one of the most common causes of transformer failure: a failing transformer is a costly replacement in an electrical system with the potential for a long downtime. If you fail to maintain your transformer with regular insulation resistance testing (as can be carried out by the WESHINE Transformer Ohmmeter (VS-3110 series) of transformer test equipment) then it’s likely to fail before reaching its maximum operating life.
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Rugged Igniter Tester
4314 KV
Model 4314 KV is a 4-wire ohmmeter designed to use low test currents for its measurement. Additional circuitry proprietary to Valhalla Scientific is used to ensure that test current levels do not exceed the specified “fail-safe current” even in a worst-case component failure situation.
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Low Ohm Meter / Distortion Meter
Feature:*Auto range*Single/Repeating measuring*Four-terminal measuring*Percentage error three steps selectable*Dual display
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Low Resistance Ohm Meters
DMO-100D
For fast and accurate measurements of low resistanceon Switch Contacts, SF-6 Switch Gear, Bushbars, Splices, Joints, Fuses, Breaker Contacts, and Rail Bonds. • 100A DC continuous current in 4 ranges of 10A, 20A, 50A and 100A
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Micro Ohmmeters
The range includes a number of portable testers designed for use in tough environments, ideal for use in test facility or out in the field. The units are rugged yet compact while maintaining accurate low resistance measurements.To compliment the range of units we also have all the accessories you could ever need, ranging from cable clamps to calibrators.
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Micro Ohmmeter
HTHL-200A / 381
Wuhan Huatian Electric Power Automation Co., Ltd.
Special instrument for circuit resistance measurement.
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Transformer Winding Resistance Meters
RMO TT Series
The Tap Changer Analyzer & Winding Ohmmeter of the RMO-TT series is designed for winding resistance measurement of inductive objects, and for a tap changer analysis. The RMO-TT series is based on the state of the art technology, using the most advanced switch mode technology available today. The RMO-TT instruments are accurate (0,1%), powerful (up to 100 A) and still portable. The Instruments generate a true DC ripple free current with automatically regulated measurement and discharging circuit. RMO-TT instruments can perform a simple, quick and reliable transformer on-load tap changer condition assessment. This series of instruments enable measurements of a winding resistance in every tap position, current ripple values (percentage of a current drop during a tap change) and transition times during the tap changes. Problems with a connection, contacts, and selector/diverter switch operation (tap change with interruption) can be detected with these measurements.
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Oil Resistivity Test System / Million Meg Ohm Meter (MM1)
OTD-45
UDEYRAJ ELECTRICALS PRIVATE LIMITED
Test voltages: 63V / 100V / 500V. Resistance range: 10 Meg ohm to 1000 Tera Ohm.
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Dynamic Micro Ohm Meter
PRIME 200
It is the only micro ohm meter in the market that integrates both the contact resistance and the dynamic resistance measurement (DRM) for cost-efficient condition evaluation of contacts in SF6 and vacuum type circuit breakers; PRIME is a high current micro-ohmmeter that provides true pure DC with smart control up to 200 A, a wide measurement range with high power, dual ground testing process, thermal printer, touch display, pre-defined test modes and automatic reporting.
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Resistance Measurement
PROMET
High-precision micro-ohm measuring systems with adjustable DC test current for determining resistances on circuit breakers or inductive loads such as transformers, for example. The high-precision ohm meters of the PROMET series are used to determine very low electrical resistances in the µΩ range. The adjustable test current of up to 600 A in combination with a four-wire measuring method delivers measurement results which meet stringent accuracy requirements. State-of-the-art power electronics coupled with a robust design guarantee excellent reliability for use as a portable device in switching stations and industrial environments. Typical applications include determining the contact resistance of switchgear devices and determining the resistance on inductive loads such as transformers.
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Micro Ohmmeter
HTHL-200P / 384
Wuhan Huatian Electric Power Automation Co., Ltd.
High-precision measurement for high-voltage switch contact (loop) resistance, also suitable for other occasions requiring high current and micro resistance measurement.
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100 Ampere Micro OHM Meters
Introduction: Measuring the line loop contact resistance by bridges is not the ideal method as the test current is only a few milli amperes. Thus the value is not the true value of the contact resistance. Model HL- 100 is a direct reading tester, and uses a test current of 100A DC, resulting in true v alue and accur ate measurements. Model HL- 100 adopts digital circuit technique and is used for measuring contact resistance of switch control equipments at test current of 100A DC. The measurements are accurate as the test is highly stable.HL- 100 is a new, fully automatic micro controlled tester that measures contact resistance at 100A DC with built in printer. The advantages of HL-100
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10A DIGITAL MICRO-OHMMETER
MPK-2000e
The MPK-2000e digital very low resistance ohmmeter is a portable, microprocessor controlled instrument used to accurately measure resistances of switches and circuit breaker contacts, transformer and motor windings, wire and cable samples, joints in busbars, etc., using test currents from 1mA up to 10A. It uses the Kelvin-type, four-terminals measurement principle, thus eliminating errors caused by lead and contact resistances.
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Low Thermal Input Cable
34102A
Use this 1.2-m shielded, 4-conductor connector only with the 34420A Micro Ohm Meter; terminated in copper spade lugs.
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Digital Micro OHM Meter
NMC's Digital Micro Ohm Meters are low cost, compact, light weight, 3½ digit resistance meter suitable for measurements of resistances of cables, wires, transformers, motor windings, coils and contact resistance of switches, connectors, relays and track resistance of PCB's etc. The value of resistance is displayed on 7 segment LED display. Four terminal measurement systems provide measurements free from errors due to contact resistance and test lead resistance.
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Electrical Installation Testers
Continuity tester for measuring the resistance of the protective earth conductors and earth bonds – an ohmmeter dedicated to electrical safety
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Super Energizer 5
SE-5
Parker McCrory Manufacturing Co.
A powerful model designed for today`s large pastures. Ideal for single or multi-wired high tensile fences. The Super Energizer 5 does everything a fence controller should do – it just does it better!!! Super Energizer 5 is equipped with a built-in DIGITAL performance meter which tells you the exact condition of fence. Shocks through wet weeds and brush. Over 8,000 volts of holding power with 500 OHM load. New color coded fence and ground terminals. Red to the fence and Black to ground. The Super Energizer 5 controls both predators and livestock, including sheep and goats. Fuse protection with built-in lightning arresters. Full 3 year warranty covers damage caused by lightning.
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Digital Micro Ohm Meters
Is used to measure DC low resistance through 4-wire method. Its features are: Comparison function to determine if the device is in good condition, unkown wire length calculation (FT/M); two-way data transmission by USB interface.
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Million Meg Ohm Meter
Model HIR 603
Laxtronics Instruments & Controls Pvt. Ltd
100 Kilo Ohm To 100 Tera ohms, Leakage Current 10 Milli Ampere To 1 Nano Ampere, Test Voltage 10 Volts DC To 1000 Volts.
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Digital Igniter Tester
Alpha 4314KRC
The Alpha 4314 Digital Igniter Tester is a portable digital ohmmeter which has been specifically designed for ultra-safe resistance testing on explosive devices (i.e. squibs, detonators).
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Micro - Ohmmeter / Milli - Ohmmeter
Basic Accuracy 0.25%Max. Test Current : 5A (120mV) for 7002Max. Test Current : 10A (60mV) for 7272Manual or Auto RangeFour Terminal Kelvin Measurement6 Ranges with 1mV Best ResolutionMeasurement of Resistive and Inductive MaterialsSetting for HI, LO & PASS ReadingsMemory of 3000 Measurements DataProgrammable HI-LO Alarm with memory of 20 DataLarge LCD with Backlight & HOLD FunctionLow Power ConsumptionBattery Operated with AC AdaptorLow Battery (Voltage) AlarmLED indication for Invalid Resistance MeasurementCable Length Measurement in feet & metersUser Interface Software for PC Communication via RS232C(to USB Bridge) cableBuilt-inBatery Chaging Circuit & Calender Clock
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Compliance Voltage Ohmmeter
ΩhmRanger-LCV
ΩhmRanger-LCV is an accurate, 3.5 Digit, Low Compliance Voltage Ohmmeter. It is able to measure from >100M to 10 Ohms, ΩhmRanger-LCV is suitable for professionals and enthusiasts alike.
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4 2/3 Digital Resistance Meter
CS2-RS
Chuan Sheng Electronics Co., Ltd.
CS2-RS Resistance Indicator has been designed with high accuracy measurement, display and communication of Ohm (2 wire) as like as Coil of motor or transformer.The meter supports Field Calibration function. It can be calibrated with sensor (Resistance) to meet machinery structure.We build flexible function as like as 3 bank (for multi-range scaling and set point) and 3 external control inputs meet to various testing equipment inquiry.They are also building in 4 Relay outputs, 3 External Control Inputs, 1 Analogue output and 1 RS485(Modbus RTU Mode) interface with versatile functions such as control, alarm, re-transmission and communication for a wide range of machinery and testing equipments applications.
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Antenna, Loop
EM-6871 | 30 Hz – 1 MHz
The EM-6871 Antenna can be used with any 50 ohm /Receiver/Field Strength Meter to obtain magnetic field measurements from 30 Hz to 1 MHz.
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Tap Changer Analyzers & Winding Ohmmeters
Winding resistance test of inductive test objects, such as power transformers, is one of the most effective non-intrusive ways of checking its condition. Due to their advanced design, DV Power winding resistance meters provide high test currents (up to 100 A DC) and high accuracy (up to 0.1%) within light and portable test instruments. In addition to winding resistance measurement, it is also possible to perform simple, quick and reliable transformer on-load tap changer condition assessment by recording the test current during tap changer operation, also known as DVtest. Because of that, problems with a tap changer connection, contacts, and switching procedure can be detected.DV Power winding ohmmeters consist of single-phase RMO-T and three-phase TWA series. Models from the TWA series are designed for six-winding resistance measurement of power and distribution transformers, with only one single-step cable setup. As a result of reducing the total test time, it enables significant saving of time and money.Typical application areas of these instruments are high-voltage substations and industrial environments. They are intended to measure the resistance of:Transformer windingsOn-load tap changersGeneratorsElectrical motorsHigh-current bus bar jointsCable splicesWelding joints
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AS5653 Compliant Small Form Pluggable (SFP) Transceiver
XCVR-AS5653
Avionics Interface Technologies
AS5653 SFP transceiver that can be inserted into any standard SFP slot - 1.0625 GBPS communication signals interface using TNC connectors - Bulkhead mountable female TNC connector at the end of a 1 meter length of RG179B/U - 100 feet of RG179 operates to better than 10E‐13 Bit Error Rate - Available for 75 Ohm single ended copper or 150 Ohm Differential
