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Resistance
that which keeps current from flowing freely.
See Also: Resistivity, Resistance Standards, Resistance Meters, Resistance Test, 4-wire
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Micro-Ohmmeters
The Micro-ohmmeter performs reliable low resistance measurements with test currents to 10A and resolution to 1. Uses a four-wire Kelvin bridge method, which eliminates test lead resistance for a measurement accuracy of 0.25%.
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Ground Resistance Testers
Whether you are doing a simplified 2-Point, a more complete 3- or 4-Point Fall-of-Potential test, a soil resistivity test or a touch potential test, AEMC has the right instrument for you. Our revolutionary clamp-on ground resistance tester will save you both time and money. Whichever AEMC ground tester you choose, you can count on it to be the highest quality, the most complete package and the simplest to learn to use.
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Glass Bottle Impact Tester
SCK-C
Glass Bottle Impact Tester is suitable for testing the impact resistance of various glass bottled products such as beer bottles, wine bottles, beverage bottles, infusion bottles, antibiotic bottles, etc.
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Slip Testing (Articulated Strut) (Mark II)
SG-P07MII
It's used to determine the slip resistance of footwear sole, heel or related materials against planar walkway surface or walkway surrogates under dry, wet or contaminated conditions.
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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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Fungus Resistance Testing
End-to-end testing helping you ensure your product's performance and resilience against fungal growth and fungus-susceptible field environments.
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Winding Resistance Meter
TRM 50+
SCOPE introduces 50 A state of the art precision winding resistance meter, specially designed for field testing as well as factory testing of large transformers up to 500 MVA. Winding resistance value of transformer and rotating machine are directly displayed on 5.7” TFT display. TRM 50 is designed to work in live EHV switchyard conditions, ensuring operator’s safety and repeatability of results. Maintenance time saving is ensured by one time connection to transformer with simultaneous resistance measurement of three / six windings, measurement of resistances of all taps with automated tap change and demagnetization facility. The meter is protected against the back-EMF offered by large inductive windings.
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Battery Testing
Weshine Electric Manufacturing Co., Ltd
The DC test method is adopted to simulate the actual use of the battery in a real and objective way, which can effectively eliminate the hidden dangers such as deficiency, deficiency and connection failure between batteries while measuring the internal resistance of the battery.
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Megohmmeter
GM-15kV / 765
Wuhan Huatian Electric Power Automation Co., Ltd.
It is suitable for testing the characteristics of electrical insulation resistance in substations, power plants, remote power cables or buried cables.
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Power Transformer 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.
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Ground Testing
Weshine Electric Manufacturing Co., Ltd
1.Soil resistivity tester supports 2, 3 and 4wire grounding resistance measurement. 2. 4digit large LCD display with white screen backlight, suitable for use in dimly lit places. 3. IP65 protection grade, good waterproof, compact and portable, supports multiple functional tests.
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Solar Power Plant Inspection Service
We provide various performance/safety tests including insulation resistance measurement, ground resistance measurement as well as string I-V inspection, EL inspection, and IR inspection using thermography. We provide services of pre-operation voluntary test and pre-operation self check, mandated by revision of FIT scheme in 2017 for solar plants of 500kW – 2,000kW.
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Three-Phase Transformer Winding Resistance Meters
TWA Standard Series
When it comes to winding resistance measurement on three-phase power transformers and autotransformers, TWA Standard series offers some of the most technically advanced instruments with LCD display in the market. Both models are capable of testing six transformer windings with a one-time cable connection, as well as three-phase automatic transformer demagnetization. The stored magnetic energy is safely automatically discharged at the end of the test. The built-in tap changer control unit enables automated test mode, where the instrument operates the tap changer without operator input and records winding resistance results based on pre-selected stabilization criteria. This option makes the operator’s job significantly easier.Both models can output test currents from 5 mA to 25 A DC for the purpose of winding resistance measurement. TWA40D has a special test mode for checking the synchronization of on-load tap changers with three phases simultaneously tested in parallel, in which the total test current can rise to up to 40 A DC.TWA40D has additional advantages when it comes to non-intrusive tap changer analysis. The unique DVtest method 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, simultaneously with the measurement of tap changer motor current which helps with the detection of 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 on three phases simultaneously. It can also be performed as an additional test simultaneously with the winding resistance test in all tap positions.An additional unique advantage of TWA40D 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 shorten the total testing time – for example, it enables the operator to perform 33 measurements instead of 99 on a tap changer with 33 tap positions.The test leads for TWA three-phase transformer winding ohmmeters are interchangeable with the TRT turns ratio testers, which means that both sets of tests can be performed with a single test lead connection to the power transformer terminals.
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Surface Insulation Resistance Testing (SIR Testing)
Surface Insulation Resistance (SIR), as defined by IPC, is the electrical resistance of an insulating material between a pair of contacts, conductors, or grounding devices that is determined under specified environmental and electrical conditions.In respect to the world of printed circuit boards (PCBs) and printed circuit assemblies (PCAs), SIR testing—also commonly referred to as Temperature Humidity Bias (THB) testing—is used to evaluate a product’s or a process’ ability to resist “failure” by means of current leakage or an electrical short (i.e., dendritic growth). SIR testing is typically performed under elevated temperature and humidity conditions—such as 85°C/85% RH and 40°C/90%—with periodic insulation resistance (IR) measurements obtained.
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Test and Measurement Pressure Transducer
P895
The P895 is designed for a wide variety of pressure measurements where high resistance to vibration and superior stability through temperature change is required. The zero and full-scale output calibrations are set by the potentiometer adjustments accessible from the top cover.
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Yellowing Resistance Chamber
Sataton Instruments Technology CO., Ltd
Yellowing resistance chamber also called as discoloration meter is the professional testing instrument for measurement of yellow resistance performance by simulating sunlight. It is a useful tool for testing the yellowing resistance property of light color materials or products such as white thermoplastic polyurethane elastomer shoe sole or light synthetic materials. The chamber can also be used for printing and packaging industry for deploying chemical dyes.
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Plastic Testing Machines
Infinity Machine International Inc.
Plastic Testing Machines by Infinity Machine International Inc. - for applications such as constant temp adhesion tester, plastic testing equipment heating distortion resistance testing, adhesive tape holding power test machine, plastic impact resistance, impact resistance for plastic pipes, salt spray plastic testing machines, uv accelerated weather plastic testers, and more.
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Megohmmeter
GM-20kV / 782
Wuhan Huatian Electric Power Automation Co., Ltd.
It is suitable for testing the characteristics of electrical insulation resistance in substations, power plants, remote power cables or buried cables.
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Flame Testing
Helping you ensure acceptable flammability and flame resistance for electronic products and components.
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Winding Resistance Meter
TRM 25
SCOPE introduces 25 A state of the art precision winding resistance meter, specially designed for field testing as well as factory testing of large transformers up to 500 MVA. Winding resistance value of transformer and rotating machine are directly displayed on 5.7” TFT display. TRM 25 is designed to work in live EHV switchyard conditions, ensuring operator’s safety and repeatability of results. Maintenance time saving is ensured by one time connection to transformer with simultaneous resistance measurement of three / six windings, measurement of resistances of all taps with automated tap change and demagnetization facility. The meter is protected against the back-EMF offered by large inductive windings.
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Membrane Conductivity Testing
Designed for membrane and separator characterization in a liquid environment. Measure resistance, conductivity, permeability, cross-over, and selectivity.
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Battery Testers
Battery testers can measure the voltage and resistance of batteries of modern technologies with precision and speed.
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Evaporation Gauges
Evaporation gauges determine the evaporation rate by measuring the changing water level in an evaporation pan. The gauges consist of a float, pulley, and counterweight attached to a potentiometer mounted through a gear assembly in weatherproof housing. The evaporation gauges produce a resistance output that dataloggers can measure.
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Leaf Wetness Sensors
Campbell Scientific offers two types of leaf wetness sensors to measure the wetness of leaves: surface contact and electrical resistance. Surface contact sensors measure the electrical resistance of a water film on their surface. Electrical resistance sensors imitate the characteristics of leaves and measure the dielectric constant of their upper surfaces.
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Vertical Vibration Test Machine
RK-3000
Shenzhen Chuangxin Instruments Co., Ltd.
The vertical vibration test machine is used to test the vibration resistance of the products.
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Ball Pressure Tester
CX-Q02
Shenzhen Chuangxin Instruments Co., Ltd.
IEC60695 Ball Pressure Tester is used for testing parts of non-metallic materials for resistance to heat.
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IEC60529 IPX1/2 Rain Resistance Tester
IPX12A-600
Shenzhen Chuangxin Instruments Co., Ltd.
The IEC60529 IPX1/2 Rain Resistance Tester is designed according to the <> of IEC60529 standard, GB7000.1 and GB4208-2008. IEC60529 IPX1/2 Rain Resistance Tester is mainly used to simulate the product under the condition of the rain climate to test the products’ physical properties.
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1KV Insulation Resistance Tester
2680
Shenzhen Chuangxin Instruments Co., Ltd.
1KV insulation resistance tester
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Ground Earth Resistance Tester
2678X
Shenzhen Chuangxin Instruments Co., Ltd.
Ground Earth Resistance Tester verifies the integrity (continuity) of the protective bonding of the equipment (Class I equipment) designed to secure safety through the basic insulation and protective earthing. It is also called earth (ground) bonding test. If the continuity of the protective bonding is confirmed, we can conclude that the equipment has the requirements for preventing electric shock even if the insulation between the primary circuit and the accessible conductive section fails and a fault current flows through the distribution system.
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Programmable AC/DC Hipot & Insulation Resistance Tester
Shenzhen Chuangxin Instruments Co., Ltd.
Programmable AC/DC Hipot & Insulation Resistance Tester can do hipot test and insulation resistance test.
