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USER MANUAL: GT1300PSS
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18 OF 32
REV 1308
®
LINEAR INTERPOLATION
Intermediate (interpolated) values may be calculated using linear
interpolation in order to maintain a high level of accuracy for your
tool.
Example:
To set the tool at 650 ft-lbs when that value is not listed
on your chart use the following formula to determine the set
pressure for the FRL:
(
)
(
)
psi
T
T
P
P
T
T
P
P
above
below
above
below
above
above
9
.
76
636
673
75
80
636
650
75
≈
−
−
×
−
+
=
−
−
×
−
+
=
Figure 13
- CHART FOR INTERPOLATION EXAMPLE
A simpler but less accurate formula may also be used:
psi
P
T
T
P
above
above
7
.
76
75
636
650
≈
×
=
×
=
P
below
P
above
T
above
T
below
650 would fall
between these lines
Where:
P
= set pressure for FRL
T
= torque to achieve