Bird Technologies 4331 - Manual (Page 37)

Chapter 4
Operating Instructions
Zero Adjust
The meter should be checked for zero set under no power conditions. With
no power applied the meter pointer should set exactly on zero. If adjustment
is required, turn the adjustment screw until the pointer is set at zero (refer
to figure 9).
WARNING
When operating this equipment in conjunction with RF power of
200 watts or higher, the potential of the center conductor of the
RF line section will be 100 volts or higher. Do not contact the
center conductor. If cleaning becomes necessary, shut off the RF
power.
Zero Adjust Screw
Figure 9
Zero Adjust
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