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voltages applied to each tube will depend upon the position of the corresponding rotary
controls, and the applied voltages will be displayed on the meters.
o The master safety switch can be used to suspend an experiment for a short time and then to
return to previously set voltage levels. If however the experimental conditions are changed
significantly, it may be prudent to turn both rotary controls down to minimum (anti-
clockwise) before re-enabling high voltages with the toggle switch. This will help to
prevent accidental overload of the detectors.