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Resistance Range Extension Unit

Technical Information

Catalogue No: C1545
Category: General Purpose
Object Type: Test Equipment
Object Name: Resistance Range Extension Unit
Part No: None
Serial No: None
Manufacturer: AVO
Division: Unknown
Year of Manufacture: circa 1960
Dimensions: Width (mm): 165
Height (mm): 95
Depth (mm): 100
Weight (g): 626
Location: Rack RAA07 [Main Store]



The range of an ammeter can be extended by connecting a low resistance, called shunt, connected in parallel with ammeter. So, the current will be distributed between the two branches in such away that an appropriate (i.e., safe) amount would go through the ammeter, and the over range (i.e., extra)current would be bypassed through the shunt resistance. This Resistance Range Extension Unit is for the AVO Model 8 Universal Avometer, low and high ranges, 0-2.5 ohm and 0-200 Megohm respectively It was made by the Automatic Coil Winder and Electrical Equipment Co. Ltd. better known as AVO.

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