TB 9-6670-248-50
(3) Repeat (1) and (2) above, using necessary weights to balance beam at midrange
and full scale.
(4) With known weights applied equal to full beam indication of 100 pounds, select
1 pound avoirdupois counterpoise weight from UUT and place on counterpoise weight hook.
Sliding poise to zero will balance beam within one-fourth pound or 1 beam subdivision,
whichever is greater.
(5) Remove 1-pound counterpoise weight from counterpoise weight hook and
substitute all other 1-pound counterpoise weights which are supplied with UUT. With the
poise set at zero, the beam will balance within one-fourth pound or 1 beam subdivision,
whichever is greater.
(6) Place weights from weight set (part of pressure gage tester) (A1, table 1) equal
to 100 pounds on top of weights on platform of UUT.
NOTE
Total weight should equal 200 pounds.
(7) Remove 1-pound counterpoise weight from counterpoise weight hook and place
2-pound counterpoise weight from UUT on counterpoise weight hook. Beam will be in
balance within one-fourth pound or 1 beam subdivision, whichever is greater.
(8) Remove 2-pound counterpoise weight from counterpoise weight hook and
substitute all other 2-pound counterpoise weights which are supplied with UUT Beam will
balance within one-fourth pound or 1 beam subdivision, whichever is larger.
(9) Remove all weights from platform and counterpoise weight hook of UUT.
(10) Place 5-pound weight from weight set on counterpoise weight hook.
(11) Utilizing any weight available, place a total weight of between 500 and 600
pounds on platform of UUT.
(12) Slide poise along beam until beam is balanced. Record beam indication.
(13) Remove 5-pound weight from weight set and substitute 5-pound counterpoise
weights of UUT. Beam will balance within one-fourth pound or 1 beam subdivision,
whichever is greater, to beam indication recorded in (12) above.
b. Adjustments. No adjustments can be made.
5