40
Zero Adjusting
WARNING!
DO NOT USE THIS SECTION
OF THE MANUAL UNLESS
ABSOLUTELY NECESSARY!
BECAUSE of the stability of the circuit
in these products, a person virtually never
has to adjust the zero setting.
ZERO ADJUSTING a meter is a two-
step process. (1) With the power OFF,
adjust the PHYSICAL ZERO (Figure 1)
until the needle rests precisely on the
lowest mark on the scale (Figure 2). (2)
Remove the DRY BOX ZERO cap (Figure
1). Hold the meter in midair so that the
bottom is level and several feet from any
object. Press and release the ON button;
this will cause the needle to rest near the
lower edge of the DRY BOX. Insert a
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