Nor-Cal CDG 160 OP Lit - Manual (Page 26)

26 CDG160-OP-LIT (2010-06)
Keep the button depressed
max. ø1.1 mm

Push the button again:
Fine adjustment
within 0...3 s: the zero adjustment value changes
by one unit (push button in
intervals of 1 s)
Change of direction
within 3...5 s: the zero adjustment changes its
direction (the blinking frequency of
the LED changes
briefly)
If the button is released for more than 5 s, the
gauge returns to the measurement mode.
The LED blinks green if the signal output is negative
(< -20 mV).