|Object Type:||Test Equipment|
|Object Name:||Portable Standard Voltmeter (AC)|
|Part No:||O.L. Moving Iron|
|Year of Manufacture:||1934|
|Location:||Main Object Store|
Portable Standard Voltmeter
Type O.L. Moving Iron
This instrument is calibrated in International Volts.
It is correct at 68°F and, if properly used, its readings may be relied upon to within B.S. substandard at 50~
Resistance of 250V range: 2900 ohms.
Temp. correction: Negligible
Elliott Brothers (London) Limited,
Century Works, Lewisham, S.E.13
Date 4th July 1934
Manufactured by Elliott Brothers, Century Works, Lewisham. London SE13.
This instrument's moving-iron operation means the scale is non-linear with its first mark above zero being 20V, mid-scale being 150V and full-scale being 250V. The scale is marked with 5V minor and 10V major increments and has numerals at 20V, 50V, 100V, 150V, 200V & 250V.