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PORTABLE ELECTRICAL MEASURING INSTRUMENTS

 

Portable D.C. Moving Coil Voltmeter Laboratory type for horizontal use, Analog permanent magnet for measuring D.C. Voltage for continuous use. Housed in laminated wooden cabinet size 235 mm length x 200 mm width x 130 mm height with detachable lid, black bakelite panel fitted with anti-parallax mirror scale knife edge pointer, rubber footings, locking arrangement and carrying handle. The movements are strongly constructed spring loaded sapphire jewel bearings which protect the bearing system from shock and reduce friction to a minimum. Hardened and precisely ground pivots and chemically treated sturdy coiled phosphor bronze springs are used. Zero adjuster is accessible from the front. The movement is light weight and quick acting and extremely robust. Scale length 150 mm, class of accuracy + 1% / + 0.5% of F.S.D. as per IS:1248:1983. All the terminals are insulated and brought out for easy connection.
Available in Single Range, Dual Range, Triple Range & Multi Range
* Details refer to the price list

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Portable D.C. Moving Coil Millivoltmeter Laboratory type for horizontal use, Analog permanent Magnet for measuring D.C Millivolts for continuous use. Housed in laminated wooden cabinet size 235 mm length x 200 mm width x 130 mm height with detachable lid, black bakelite panel fitted with anti-parallax mirror scale knife edge pointer, rubber footings, locking arrangement and carrying handle. The movements are strongly constructed spring loaded sapphire jewel bearings which protect the bearing system from shock and reduce friction to a minimum. Hardened and precisely ground pivots and chemically treated sturdy coiled phosphor bronze springs are used. Zero adjuster is accessible from the front. The movement is light weight and quick acting and extremely robust. Scale length 150 mm, class of accuracy + 1% / + 0.5% of F.S.D. as per IS:1248:1983.All the terminals are insulated and brought out for easy connection.
Available in Single Range, Dual Range, Triple Range & Multi Range. * Details refer to the price list

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Portable D.C. Moving Coil Ammeter Laboratory type for horizontal use, Analog permanent magnet for measuring D.C Current for continuous use. Housed in laminated wooden cabinet size 235 mm length x 200 mm width x 130 mm height with detachable lid, black bakelite panel fitted with anti-parallax mirror scale knife edge pointer, rubber footings, locking arrangement and carrying handle. The movements are strongly constructed spring loaded sapphire jewel bearings which protect the bearing system from shock and reduce friction to a minimum. Hardened and precisely ground pivots and chemically treated sturdy coiled phosphor bronze springs are used. Zero adjuster is accessible from the front. The movement is light weight and quick acting and extremely robust. Scale length 150 mm, class of accuracy + 1% / +0.5% of F.S.D. as per IS:1248:1983.All the terminals are insulated and brought out for easy connection.
Available in Single Range & Dual Ranges. * Details refer to the price list

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Portable D.C. Moving Coil Milliammeters/Microammeters Laboratory type for horizontal use, Analog permanent Magnet for measuring D.C Milliamps & Microamps for continuous use. Housed in laminated wooden cabinet size 235 mm length x 200 mm width x 130 mm height with detachable lid, black bakelite panel fitted with anti-parallax mirror scale knife edge pointer, rubber footings, locking arrangement and carrying handle. The movements are strongly constructed spring loaded sapphire jewel bearings which protect the bearing system from shock and reduce friction to a minimum. Hardened and precisely ground pivots and chemically treated sturdy coiled phosphor bronze springs are used. Zero adjuster is accessible from the front. The movement is light weight and quick acting and extremely robust. Scale length 150 mm, class of accuracy 
+ 1% / + 0.5% of F.S.D. as per IS:1248:1983.All the terminals are insulated and brought out for easy connection.
Available in Single Range & Dual Ranges. * Details refer to the price list

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Indicating Moving Coil D.C. Instruments:
Panel Mounting, General specifications, sizes, types etc. are of same as A.C. Instruments. The Ammeters upto 30 Amps will be supplied in direct coil and higher ranges will be supplied with suitable external shunt and lead of 75 mV or 60 mV basic drop. Center zero type instruments can be used in A.C. system, when fed through bridge rectifiers.
Size Scale length Accuracy
72 mm square 60 mm + 1.5% of F.S.D.
96mm square 88 mm + 1.5% & 1% of F.S.D.
144 mm square 140 mm + 1.5% & 1% of F.S.D.

External Shunts with leads 50 mV, 60mV or 75mV drop to be used with Portable and Panel meters above 30 Amps. Standard ranges are 50A, 75A, 100A, 150A, 200A, 250A, 300A, 400A, 500A, 60A, 750A, 1000A, 1200A, 1500A, 2000A, 2500A, 3000A, 4000A, 5000A, 6000A, 7500A, 8000A, & 10000A.
Note:1) Shunt with 100 mV and 150 mV drop can be supplied against specific requirement 2) Instruments above 30A, external shunt is necessary and the basic movement is 75 mV drop.

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Portable A.C Moving Iron Voltmeter Labortory type for horizontal use, Analog for measuring A.C. Voltage for continuous use. Housed in laminated wooden cabinet of size 235mm length x 200mm width x 130mm height with detachable lid, black bakelite panel fitted with anti - parallax mirror scale, knife edge pointer, rubber footings, locking arrangements and carring handle. The movements are strongly constructed spring loaded sapphire jewel bearings which protect the bearing system from shock and reduce the friction to a minimum. Hardend and precisely ground pivots and chemically treated sturdy phosphor bronze springs are used. Zero adjuster is accessible from the front. The movement is light weight and quick acting and extremely robust. Scale length 150mm., Class of accuracy +1%, + 0.5% of F.S.D. As per IS : 1248 : 1983. All terminals are insulated and brought out for easy connection.
Available in Single Range, Dual Range, Triple Range & Multi Ranges * Details refer to the price list

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Portable A.C. Moving Iron Ammeter Laboratory type for horizontal use, Analog for measuring A.C. Current for continuous use. Housed in laminated wooden cabinet of size 235mm length x 200mm width x 130mm height with removable lid, black bakelite panel fitted with ant - parallax mirror scale, knife edge pointer, rubber footings, locking arrangements and carrying handle. The movements are strongly constructed spring loaded sapphire jewel bearings which protect the bearing system from shock and reduce the friction to a mininum. Hardened and precisely ground pivots and chemically treated sturdy coiled phosphor bronze springs are used. Zero adjuster is accessible from the front. The movement is light weight and quick acting and extremely robust. Scale length 150mm., Class of accuracy + 1% + 0.5 % of F.S.D. As per IS : 1248 : 1983. All the terminals are insulated and brought out for easy connection.
Available in Single Range, Dual Range, Triple Range & Multi Ranges * Details refer to the price list

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Panel Meters indicating moving iron A.C. Voltmeters and Ammeters are used for measuring A.C. Voltage and current meant for continuous use. These instruments are housed in bakelite/ ABS mouled case. The movements are strongly constructed with spring loaded sapphire jewel bearing which protect the bearing system from shock and reduce friction to a minimum. Hardened and precisely ground pivots and chemically treated sturdy coiled phosphor bronze springs are used. Zero adjuster is accessible from the front. The movement is light weight and quick acting and extremely robust. Voltmeters are for direct connection upto 600 Volts & Ammeters are direct upto 100 Amps. For higher Voltage & Current, suitable P.Ts and C.Ts. can be used. P.T. and C.T. calibrated meters can be supplied as per customers requirements. Suppressed scale moving iron Ammeters can be supplied with maximum upto 6 times of the rated value. Other specifictions as per IS : 1248: 1983.

Size Scale length Accuracy
72 x 72 mm sq. 60 mm + 2% & 1.5 % of F.S.D.
96 x 96 mm sq. 88 mm + 1.5% of F.S.D.
144 x 144 mm sq. 140 mm + 1.5% & 1 % of F.S.D.
* Sizes & Ranges refer to the price list

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