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Progressive Electronics No. 230 Open Fault Meter
Progressive Electronics No. 230 Open Fault Meter
Progressive Electronics No. 230 Open Fault Meter
Progressive Electronics No. 230 Open Fault Meter
Progressive Electronics No. 230 Open Fault Meter
Progressive Electronics No. 230 Open Fault Meter
Progressive Electronics No. 230 Open Fault Meter
Progressive Electronics No. 230 Open Fault Meter
Progressive Electronics No. 230 Open Fault Meter
Progressive Electronics No. 230 Open Fault Meter
Progressive Electronics No. 230 Open Fault Meter

Progressive Electronics No. 230 Open Fault Meter

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This is a tested and fully functional megohm meter built Progressive Electronics for Ma Bell, the Bell System. Is is their Model 230 Open Fault Meter; a specialized diagnostic test instrument designed to locate open circuits, breaks, and faults in underground wiring, landscape lighting, and irrigation system control cables. Works by using the capacitance of the wire pair to determine distance, the farther the distance, the greater the capacitance, and thus the greater the needle deflection.

0 to 1,999 ft / 19,990 ft to Fault + Strap, d'Arsonval meter
Resistance Fault Meter
Includes:  Leads Set, Manual, Carrying Case and Strap
needs 8, AA batteries