BIRD Thruline 4304A, Руководство по эксплуатации

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Maintenance
17
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 8
on page 16
).
Connector Replacement
The Bird 4304A has Bird “QC” connectors which are designed to be easily
changed. To change the connector, remove the four screws at its corners and
then pull it straight out. Push the new connector in, making sure that the center
pin on the connector aligns with the socket, and screw into place.
Element Removal
Note:
If the element is replaced, the unit will need to be returned to
a Bird Service Center for recalibration. Changing
elements without recalibrating will result in inaccurate readings.
1. Remove the screw at the lower left corner of the element socket.
2. Move the stop over the hole where the screw had been until it is free from
the element.
3. Pull the element out while turning slightly clockwise.
4. To replace the element, reverse these steps.
Note:
Ensure that the stop is on the element before replacing the screw.
Back Cover Removal
Note:
The back cover must be removed before replacing the line
section or meter (see
Figure 8 on page 16
):
1. Remove the screws on the rear of either side of the housing.
2. Pull the back cover off.
WARNING
Never attempt to connect or disconnect RF equipment from the transmission
line while RF power is being applied.
Leaking RF energy is a potential health hazard.