Table 45 (Continued)
Check the calculated amount of material
Compare balance and
W or V
discharged against the number of pounds fed
as indicated by the revolution counter. If the
adjust poise if
weight of the chemical delivered differs from
that indicated by more than + 1 percent, adjust
the poise on the scale beam and repeat the
test. (Moving the poise to a lower value
reduces the loading on the belt and vice
Repeat testing and adjustment until a belt
loading is found that agrees with the amount
fed, as indicated by the totalizer counter.
Note: Some belt type gravimetric feeders may
be made to discharge into a container of
known weight, in which the feed rate may be
checked by actually weighing the amount
discharged at a definite time.
W or V
When the feeder is empty, check the tare
weight to make sure that the scale shows
0 weight. All other determinations and
adjustments are similar to the belt-type
gravitmetric feeder described above.
(1) W-Weekly; V-Variable, whenever new chemical is used in feeder.
(2) The frequencies shown are suggested frequencies that may be modified by
local command, as individual installation conditions warrant.