TB 9-6670-254-50
Observation nmber
Load
Balance idications
01
B (Std)
---
02
A (TI)
---
03
A+M
---
04
B+M
---
(6) Select sensitivity weight of value large enough so that balance remains on scale
when it is added to both standard and TI weighings.
NOTE
If necessary, add the same amount of incremental weight to
pan for each weighing to bring balance in range marker.
(7) Place sensitivity weight on balance pan and record indication.
(8) Replace TI with standard and record indication (a total of four readings is now
recorded). Do not remove sensitivity weight.
(9) Compute weight value of TI, using the following formula:
A = B + K (02 - 01 03 - 04)
2
Where: A = Value of TI weight
B = Value of standard weight
K= M
03 - 02
M = Value of sensitivity weight
Subscripts indicate the order of weighings.
EXAMPLE:
TI weight (A) = 5 lbs or 2267.9619
g nominal value
Standard weight (B) = 4.9999902 lbs
or 2267.957405 g from Primary
Sensitivity weight (M) = 100 mg
NOTE
A 500-mg IW (incremental weight) is used during all weighings
to bring milligram scale IN-RANGE, between 2268 and 2269 g.
15