KA BAND OUTDOOR TWT AMPLIFIER
S-4
p)
If you do not know how the equipment works and what the hazards associated with
the equipment are in specific terms, do NOT handle the equipment
. The greatest
protection you can have when dealing with high voltage equipment is specific detailed
knowledge on that particular piece of equipment.
q)
Avoid "haywire" test setups
. It is easy to get in trouble if the setup you are using has a
jumble of wires.
r)
Make sure your connections are secure
. Do NOT allow leads to slip off and move
about in an uncontrolled fashion. Even if it is not one of the high voltage leads, a free
lead could (and generally does) move exactly to where you do not want it. The only
safe connection is a mechanically secure one.
s)
Watch out for unterminated high voltage leads
. Some connectors depend on circuit
loading to avoid arcing between closely spaced terminals. Unloaded high voltage lines
or plugs can lead to arcing situations.
t)
Shut off the high voltage when you are making low voltage measurements
. It does
not make sense to increase danger needlessly. While there may be times when you
cannot shut off the high voltage during a low voltage measurement, this is generally
not the case.
u)
Remove the test equipment when you have finished a measurement program.
There
have been many instruments destroyed or damaged because a test program was
conducted in a haphazard manner, rather than in an orderly progression from start to
finish. Experience has shown in many instances when a little order would have
prevented a tragedy or avoided an expensive mistake.
v)
Be extremely wary when making filament voltage measurements.
The cathode of
tubes is elevated above (or below) ground and the filament voltages usually cannot be
measured with reference to ground. Do everything you can to assure that the high
voltage cannot be turned on when you are making your measurements. This includes
disconnecting the high voltage drive source, shorting out appropriate leads, taping
down switches, and anything else you can think of to protect yourself.
w)
When troubleshooting a unit, assume that the switches and components are
defective.
You may shut off the high-voltage switch in some systems, but if the switch
were defective, the high voltage would still be on. Returned units are potential booby
traps.
x)
Make sure that your workstation is stable.
Flimsy work surfaces or supports for the
equipment or the test instruments represent a real threat. Do NOT use a setup that you
know is unstable and/or dangerous.
y)
Use a 1-minute rule.
Wait 1 minute or more after you have shut off the equipment
before you work on a unit. Part of the reason for a
1-minute rule is that some of the dielectrics (insulators) used for high voltage circuits
can store a charge. While the amount of charge stored is a function of the size of the
object, a 1-minute rule provides an additional margin of safety.
INSTALLATION AND OPERATION MANUAL
