Wattcher Monitor/Alarm Model 3170B
16
Maintenance Procedures
Adjusting the Element Wiper Contact
Note:
Continuous insertion or rotation of the element might cause a slight change in the position of
the contact spring in the element socket. If the contact spring changes position, erratic power readings
may be experienced.
Note:
For this procedure, use a small flat head screwdriver.
1.
Place the flat side of the screwdriver behind the contact bar. See
2.
Bend the contact bar so that the contact rests in the center of the slot adjacent to the element socket.
3.
Bend the contact bar slightly toward the center of the element socket bore.
4.
Ensure the profile of the element contact is visible when viewing the element socket from the top of the socket
bore.
Note:
If the contact is accidentally moved too far into the element bore, the element will not slide into
the socket. Move the contact back into the recessed area and repeat the process.
Figure
8
Adjust Element Contact Up and Down
WARNING
Never attempt to adjust wider contact with RF power applied to the transmission line.
CAUTION
If the element cannot be fully inserted into the socket, do not force it. You might
damage the element wiper contact.
CAUTION
Be careful not to bend element wiper contact out too far as to interfere with insertion
of the elements.
Adjust element contact up and down
Adjust element contact in and out
