Ballastic Galvanometer (OSAW Type) The moving coil system is housed in aluminium case with an easily removably front sliding cover. A rectangular coil with a large moment of Inertia and a large....
The moving coil system is housed in aluminium case with an easily removably front sliding cover. A rectangular coil with a large moment of Inertia and a large cross section is suspended with the help of a fine phosphor bronze suspension strip and moves in a strong magnetic field gnerated by a permanent magnet. The coil carries a 10 mm circular concave mirror of 100 cm focal length which renders the instrument to be used in conjuction with a Lamp and Scale Arrangement. Having circular base with three levelling screws. A Zero Adjuster is provided to set the spot of light on scale. A clamp the coil during transit. Rigid in construction. Having large periodic time. These galvanometers can be used both as PERIODIC as well as APERIODIC instruments. An arrangement is provided in the instrument to make it APERIODIC by introducing a suitable resistance in parallel with the moving coil system. Cat. Galvanometer Time period Sensitivity at 1 No. Resistance Approximate meter distance per (Ohms) (Seconds) micro Coulomb (mm) 100 8 - 10 Sec. 300 500 8 - 10 Sec. 600