Rochester Avionic Archives

Electrical Resistance Standard

Electrical Resistance Standard - Photo 1
Catalogue NumberC1027
Sub-categories
Year of manufactureCirca 1960
LocationRack RAA07 [Main Store]
Object TypeTest Equipment
DivisionUnknown
Platform
Manufacturer
Part NoRS1
Serial No6296
Dimensions
Width (mm):115
Height (mm):160
Depth (mm):115
Weight (g):760
Inscription(s)Cropico Resistance Standard Type RS1 No 6296 400 Ohms 0.16 Amp Croydon Precision Instrument Co Made in England ----------------------------------------- Elliott Bros. (London) Ltd Rochester. Drawing Serial IN578 Contract Date
NotesThis is a 4-terminal resistance standard; 10000 ohm 0.03 amp rated at just over 10 watts. Two of the terminals have Dymo-tape labels ("IO." and "II."), probably the current-input terminals; the other two are unmarked but are probably the voltage-sensing terminals. It also has a shield terminal, a recess for a thermometer and a plunger with knob (used to agitate the internal coolant to ensure even temperature distribution). The unit is also marked in red paint with "F.A.T." (Factory Acceptance Test)

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