BIRD THRULINE 4450, Operating Instructions & Parts List Manual

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Pre ven tive Main te nance
W A R N I N G
Provide adequate ventilation and observe normal precautions when using dry cleaning
solvents. Many dry cleaning agents emit toxic fumes that may be harmful to your health if
inhaled. Avoid excessive skin contact or inhalation of the fumes when using any dry
cleaning solvent
If any of the con tacts or line con nec tors be come dirty, they should be cleaned with an aero sol type
cleaner that leaves no res i due, or any dry clean ing sol vent on a soft cloth or cot ton swab stick.
Clean all con tact sur faces and the ex posed sur face of the Tef lon in su la tors.
The hous ing and me ter glass can be cleaned with a soft cloth and a mild de ter gent so lu tion.
CAU TION
Clean the me ter glass only when nec es sary and be care ful not to use an ex ces sive amount of
wa ter/de ter gent so lu tion that might drip in side the hous ing and dam age the elec tri cal
com po nents.
Trou ble shooting
Ta ble 5-1 con tains trou ble shoot ing in for ma tion for prob lems which can oc cur dur ing nor mal op er -
a tion. Lo cate the prob lem, re view the pos si ble causes, and per form the ac tion listed.
Bird Model 4450 Thruline Wattmeter
5-2
PROB LEM CAUSE AREAS TO CHECK / COR REC TION
No me ter in -
di ca tion
No RF power
4
Check trans mit ter or trans mis sion line
4
Open or short
in dc cir cuit
4
Check me ter leads or cir cuit board and re -
lated com po nents
De fec tive me ter
4
Check me ter
In ter mit tent
or in con sis -
tent me ter
read ings
Faulty load
4
Check dc re sis tance of load
Faulty trans -
mis sion line
4
Check line for shorts, opens, bad con nec -
tions or de fec tive con nec tors
De fec tive con -
nec tion or cold
sol der joints
4
Check cir cuit board and re lated parts for
bad con nec tions
Sticky or de fec -
tive me ter
4
Check me ter and re place if nec es sary