Radio Shack 22-812A Manual page 7

SELECT – press to toggle measurement options within a
function.
RANGE – Selects auto or manual ranging.
press to enter the manual range mode and press to select
different ranges.
hold down about 2 seconds to e�it the manual range mode.
HOLD – press to hold all indications on the display.
To cancel hold, press HOLD again or set the function dial to
another setting.
REL – Takes relati�e measurements.
Hz/DUTY/WIDTH – Measures frequency, duty cycle, and pulse
width.
MAX/MIN – Stores ma�imum and minimum readings.
Function/power dial
Rotate to turn the meter on/off. Rotate to select the
measurements, then press SELECT to choose the function.

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