Electrical & Electronic Testing Devices #232619

Range 0.2 ohm to 11 ohm
It is a standard testing instrument for accurate measurement of very low resistances such as shunts, copper & aluminum conductors or wire and specific resistance determinations of heavy distribution transformers. The bridge comprise 10 steps of standard resistance of X 0.01 ohms and a circular slide wire having total resistance of 0.01 ohm & divided into 500 equal parts so that each division correspond to 0.00002 ohm (or 20 micro-ohm). It is also provided with 5 multiplier ranges of X 0.001, X 0.1, X 1, X 10 & 100 so that the overall range becomes 0.2 Micro-ohm to 11 ohms. Provided with built in compensation arrangement for taking into consideration self resistance of leads from bridge to test object. Complete with one standardized set of 8 leads for interconnections. All standard resistance coils used inside are of Aged Manganin wire or strip so that overall accuracy of 0.05 % is achieved. This model is mostly used in wire & cable industries & conforms to IS : 694 & 1554 & hence it is also named as Industrial Kelvin Double Bridge.
Extra Accessories:
a) DC source of 10 Amps
b) Spot Reflecting Galvanometer
c) Conductivity attachment of 1M length for holding sample

Portable Ammeters and voltmeters are designed for use in the field test rooms and laboratories, where precise measurement is required. These portable Instruments can be used equally well in educational institutions, where there is possible misuse; and in factories, where these instruments are important for making calibration check on switchboard panel instruments. General features:
Knife edge pointer and Anti-parallax mirror scale
Shock resistant pivot jewel movement. The pivots are made from carbon steel hard chrome plated and are mounted on spring loaded sapphire jewels. This ensures shock resistance due to vibrations in transit and minimum friction during use.
Accuracy class 1.0% as per IS:1248
Wooden case with Bakelite Top
Wide window for easy reading
Quick response due to unique damping
Scale Length 150mm(approx)
Insulation Resistance Over 20 megaohms at 500 VDC
Sensitivity 1000 ohms/V for DC Meters
Test Voltage 2000V AC (rms)for 1 minute

Digital Cable Fault Locator is a precision instrument, easy to use, which provides spontaneous display of the location of break in pair wires and cables. Unlike conventional cable fault locators in which a lengthy procedure of obtaining a null point in a galvanometer and then computing the faulty length of cable is to be gone through, here the faulty cable is just to be connected, one setting to be made and location of fault in terms of total length directly read on display upto a resolution of 0.1%.
Display: 3 Digit bright LED display.
Resolution: 0.1%.
Power: 220 V AC 10%.