Nor-Cal CDG 045 OP Lit - Manual (Page 26)

26 CDG045-OP-LIT (2010-1)
Keep the button depressed
max. ø1.1 mm

Push the <ZERO> button again:
Fine adjustment
within 0...3 s: the zero adjustment value changes
by one unit (push <ZERO> button in
intervals of 1 s)
Change of direction
within 3...5 s: the zero adjustment changes its
direction (the blinking frequency of
the <STATUS> LED changes
briefly)
If the <ZERO> button is released for more than 5 s, the
gauge returns to the measurement mode.
The <STATUS> LED blinks green if the signal output is negative
(< -20 mV).