Bird Technologies 4527 - Manual (Page 33)

21
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).
Figure 12 Zero Adjust
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 pro-
tects the meter and will not expose the element diode to dangerous potentials
should the line section be energized.