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From Megger, these highly accurate, easy to operate instruments measure resistance with resolution as fine as 0.1 micro-ohm. Digital micro-ohmeters and DLROs measure contact resistance of switch and circuit breakers, aircraft frame bonds, and rail and pipeline bonds just to name a few of the applications. Megger has models available for testing using test currents from 0.5 mA to 100 amps covering a multitude of applications that require precise low-resistance measurements.
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Agilent LCR and resistance meters are useful in testing components and materials in a variety of research and design applications and in component manufacturing. LCR meters measure impedance (inductance, capacitance, and resistance) at spot frequencies. Resistance meters are optimized for high-resistance or low-resistance measurements.
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The new, high-precision ohm meters of the PROMET range deliver an adjustable test current of up to 600 A which is independent of the supply voltage.
They utilize the four-wire resistance measurement method, enabling them to meet the most stringgent accuracy requirements. State-of-the-art power electronics coupled with a robust design guarantee maximum reliability, even for portable use in switching stations and industrial environments.
PROMET ohm meters feature a modern operating concept, an interface to the test systems of the ACTAS product range and an optional remote control unit, making them both flexible and versatile.
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The Fluke 1520 MegOhmMeter is a handy insulation resistance tester that also measures voltage and checks connections with its Lo-Ohms function.
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MJÖLNER 200 is designed to measure the resistance of circuit breaker contacts, bus-bar joints, contact elements in bus-bars and other high-current links. The product has been designed with safety, ease of use and versatility in mind. With MJÖLNER 200 it is possible to make measurements according to the DualGround™ method. This means that the test object will be grounded on both sides throughout the test giving a safer, faster and easier workflow.
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Digital low-resistance measuring instrument in accordance with DIN VDE 0 413 part 4 and EN 61 557 parts 1 and 4
- Two measuring ranges from 0.01 to 1999 kOhm
- Zero balancing for measurement cables
- Compact and rugged - for service calls and laboratory use
- Overvoltage protection - protects the instrument in the event of inadvertent connection to mains power
- Indication of interference voltage
- Measuring category CAT lll 300 V / CAT ll 600 V
- IP 65 protection
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QT25 uses a unique method to detect exact PCB short circuit locations and also pinpoint the shorted components/tracks. Ideally PCB tracks are suppose to have zero resistance, but in actual conditions they have small resistance. The exact location of the short is where the instrument reads the lowest value of resistance and this resistance could be detected with a sensitive instrument like QT25, even in power planes.
QT25 can also be used in measuring the contact resistance of switches and relays in its milli-ohm mode.
QT25 is designed to apply a drive voltage of less than 200 millivolts, while detecting shorts in the populated PCBs, so as to avoid turning on the semiconductor devices inside the circuit, which could lead to misleading results.
There is a composite '16 character alpha numeric backlit LCD display' to show the Resistance range selected, Offset indication, Resistance value, and also the Units.
1. 4 wire resistance measurement
2. Back-lit 16 character alpha numeric display
3. Complimenting modulated audio tone
4. Resistor range of 200 milliohms, 2 ohms and 200 ohms.100 micro ohm resolution in 200 milli ohm range
5. Auto offset capability upto 200 ohms
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Resistance measuring instrument with analog display for use in the plant, on service calls and for installation work
Resistance measuring instrument with analog display for use in the plant, on service calls and for installation work
Measuring method: current measurement
Large variety of measuring ranges from 0.05 º 1 M Ohm (5 ranges)
Ranges for rough capacitance measurement from 0 to 30 000 uF
Integrated buzzer for continuity testing
Rugged moving-coil mechanism with spring loaded bearing jewels allows for use under adverse operating conditions
Dimensions: 100 x 140 x 35 mm, weight: approx. 0.3 kg without battery
Battery: 1.5 V IEC LR 6 (AA mignon)
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Automatic inspection and test unit
Automatic choice of measuring ranges from 200 µOhm to 20 kOhm (2304) resp. 2 mOhm to 20 kOhm (2305)
Resolution up to 1 nOhm (2304) resp. up to 0,1 µOhm (2305)
Interfaces in series (IEEE488, RS232, RS485),
Checking of tolerances, classification with statistics
Highest measuring accuracy
Measuring error <= 0.01 % (2304) resp. <= 0,05 % (2305)
Future-orientated measuring method with thermal e.m.f. compensation.
High level of stability due to constant comparisons with internal reference values.
2 models depending on the requirements (2304, 2305)
Inductive probes
Current regulation results in voltage-free disconnection, calculation of cooling curves of coils.
Menu control
Setting for measuring current entry for absolute or relative limits, classification with statistics, bar display for calibration of measuring probes, determination of resistivity, and many other functions.
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1. Most useful in locating Vcc - Gnd shorts and track shorts in PCBs
2. 3U cPCI / PXI Platform for rugged Environment
3. Hot Swap (Live Insertion / removal)
4. 4 wire resistance measurement
5. Complimenting modulated audio tone
6. Resistor range of 200 milliohms, 2 ohms and 200 ohms.100 micro ohm resolution in 200 milli ohm range
7. Auto offset capability upto 200 ohms
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