maintain the zero reading on the galvanometer. Final adjustment is made by
ensuring that the galvanometer does not deflect when keys No. 4 and R are
alternately selected.
The voltage across the generating resistor is now equal and opposite to the
standard cell EMF and the potentiometer is standardized.
CAUTION
DO NOT OPERATE THE EMF REVERSING SWITCH WHILE THE STD
PUSHBUTTON IS DEPRESSED, SINCE THE VOLTAGE FROM THE
GENERATING RESISTOR WILL BE REVERSED, AND IF THE GA
SENS KEYS ARE DEPRESSED, A CURRENT FLOW MAY DAMAGE THE
STANDARD CELL.
Figure 2-3.
Connecting the system
20
Previous Page
