Bird Model 43 Wattmeter
30
Zero Adjust
The meter’s zero setting should be checked when no RF power is
present. When no power is applied the pointer should rest exactly on
zero. If adjustment is required, turn the adjustment screw until the
pointer is set at zero (see Figure 12).
Storage
When storing the meter, keep an element or dust plug in the element
socket to prevent the intrusion of dust and to prevent damage to the
meter movement. When using an element, use the highest power
element available. Turn it so that the “arrow” points up (midway
between the FWD and RFL positions). This protects the meter and
will not expose the element diode to dangerous potentials should the
line section be energized.
Figure 12
Zero Adjust
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