TM 5-6675-323-14
NOTE
Tracer arm should be shortest one possible that will allow entire shape
to be measured without moving planimeter.
(6) Aline planimeter with tracer arm length selected (paragraph 9-6.2 n).
( 7 ) R e c o r d RT v a l u e .
This value is to be used in step (14).
NOTE
F a c t o r y d e t e r m i n e d RT v a l u e i s p r o v i d e d o n C a l i b r a t i o n R e c o r d s S h e e t
provided with equipment. Alinement is performed as a check.
(8) Place planimeter near shape to remeasured so that length of tracer arm
lies along imaginary line through center of shape.
(9) Set wheels so that their axles form 90 degree angle with tracer arm.
(10) Make practice trace to be sure tracer arm will cover area in one
operation.
( 1 1 ) Select starting point for measurement on shape where imaginary line
crosses boundary of shape.
(12) Mark point.
(13) Set dot in lens tracing assembly over starting point.
( 1 4 ) E n t e r i n t o c a l c u l a t o r h o r i z o n t a l a n d v e r t i c a l s c a l e s o f s h a p e a n d RT
values.
(a)
Key
in
horizontal
scale;
press
.
(b)
Key
in
vertical;
press
.
RT value;
press
.
(c)
Key
in
and
(d) For results in square feet or square feet and acres, press
d.
NOTE
I f RT v a l u e i s n o t e n t e r e d , a l l r e s u l t s f r o m c a l c u l a t o r w i l l b e z e r o .
When results are printed, the first area given will be in square feet,
the second in acres.
(15) Clear auto-scaler by pressing CLEAR button.
9-56
