Figure 5-3. Electrical zero test circuit schematic diagram.
B201 is displaced, a signal is induced in the transmit-
5-6. Transmitter Test
ter stator, and this signal is transmitted to the indica-
tor stator. A magnetic field is built-up across the in-
T h e transmitter test circuit for synchronous indicators
dicator stator which causes the rotor to turn to a
(fig. 5-4) is enabled by TEST SEL switch S203 at SYN
position that corresponds to that of the transmitter.
IND and SYN IND switch S202 at CAL. With this test
The dial reading of the indicator is then checked for
setup, the rotors of transmitter B201 and the indicator
correspondence with the setting of the transmitter dial.
under test are energized by 26 volts, and the stators are
connected back to back. When the rotor of transmitter