Bird Technologies 6151A - Manual (Page 20)

Inspection
Inspection will be necessary at six months intervals. Check for coolant oil seepage
around the radiator tank, particularly at the front and back around the underside
of the clamping band. If leakage is observed refer to the troubleshooting table and
check tightness of the clamping screw and the fasteners around the front cylinder.
Preventive Maintenance
Preventive maintenance is limited to:
s Cleaning the equipment, particularly the radiator fins. It is important to main-
tain the heat transfer efficiency of the cooling fins.
s Check the coolant level in the radiator tank occasionally.
s Keep the dc plug connected to the line section and the Plug-In Element. in its
socket at all times. This will prevent dust and dirt from accumulating in the
sockets.
Do not subject the meter and Plug-In Element to rough treatment. Do not drop as
a sharp blow may damage meter or alter the ± 5 percent accuracy of the Plug-In
Element.
+
Note: When using as a termination only, point the Element arrow up or at a
right angle to the Line Section.
Disassembly
There are no special techniques required for the repair or replacement of components
in these Termaline Wattmeters.
Tools Required A screwdriver and a small wrench are the only tools needed.
There are no special techniques required for the repair or replacement of components
in these Termaline Wattmeters.
RF Connector The connector is a “Quick-Change” design which permits easy interchange with the
use of only a screwdriver. This process does not interfere with the essential coaxial
continuity of the load resistor RF input or the coolant oil seal. For replacement,
proceed as follows:
1. Remove the four 8-32 x 5/16 round head machine screws
from the corners of the RF connector.
2. Pull the connector straight out of its socket.
Diaphragm and
Coolant Oil
Remove the diaphragm to replace or examine the coolant oil. For replacement of the
diaphragm and coolant oil follow the steps below.
CAUTION
Do not replace coolant with anything but the specified fluid. The inner shell of the resistor
housing is contoured to the dielectric properties of this fluid. The use of any other type of
coolant will affect the electrical performance of the load.
1. Stand the load vertically, with the back end up.
2. Loosen the clamp screw until the clamp band is released.
Bird Model 6151A Termaline Wattmeter
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