Calibration
16
3.4 Center the Fine Tuning
Center the
zero
and
span
fine-tuning potentiometers to allow precise adjustment
in either direction. Use a small screwdriver to turn each potentiometer up to 15
turns clockwise until it clicks. Then, turn it back halfway, 7-½ turns
counterclockwise (see Figure 4: on page 17).
3.5 Disable Scaling
Scaling is the ratio of the output voltage to the displayed reading. Disable scaling
so it does not interfere with calibration. Use a small screwdriver to turn the
scaling
potentiometer up to 15 turns clockwise until it clicks (see Figure 4: on page 17).
