TM5-6675-326-14
6-6.2.14 Alinement of Planimeter With Lens Tracing Assembly - Continued
NOTE
Press
SCI key to perform following equation.
SHOR = Horizontal scale of shape to be measured
SV E RT = Vertical scale of shape to be measured
AT= Area of test rule
RT = Average of pulse count readings
S H O R and SVERT are usually provided with map.
A T is premarked value on top of test rule.
R T can be found on Calibration Records Sheet or
from average of measurements made with test rule.
l .
If QPS is being initially alined with premarked tracer arm
lengths, compare average RT value to RT value found on
Calibration Records Sheet provided with equipment.
m.
Note value of actual area measured by test rule, which is
premarked on top of test rule.
Use test rule area and the
scale ratio of shape to be measured to determine C A
( c a l i b r a t i o n c o n s t a n t ) .
C A is needed to perform various
measurements.
6-6.2.15 Alinement of Planimeter With Needle Tracing Assembly. Alinement
of the planimeter with the needle tracing assembly follows the same
procedure as alinement of the planimeter with the lens tracing assembly
(para 6-6.2.14).
The test measurement checks the alinement of the
planimeter with the initial use of the needle tracing assembly. The
needle on the needle tracing assembly fits into the hole on the long test
rule to make test measurements.
The average RT reading obtained by
following the steps for the lens tracing assembly should be within ±0.2%
of RT value given on Calibration Records Sheet provided with equipment.
The same formula is used to determine the calibration constant, CA.
6-6.2.16 Alinement of Linear Measuring P r o b e . A l i n e m e n t o f t h e l i n e ar
measuring probe provides information needed to make linear measurements.
Using the testing procedure provides values needed to check alinement with
factory determined values and provides a constant to use in determining
additional measurements and calculations.
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