CDI Torque SURETEST Torque Calibration System - Manual (Page 58)

MANUAL LOADER CHAPTER 6
6-57
500 -0.1543
600 -0.1852
700 -0.2160
800 -0.2469
900 -0.2777
Correction Factor for Check Point Readings
1. Determine latitude and altitude. Obtain information from local geological survey office or
library.
2. Find the acceleration due to gravity for sea level from its chart.
3. Subtract the free air correction for altitude from its chart.
4. Divide the result calculated in step 3 by the standard gravitational factor
980.665cm/sec/sec.
5. Multiply the check point in the calibration charts by the factor calculated in step 4 to
obtain the corrected
check point readings while using the original weight.
Correction Factor for Weights
1. Determine latitude and altitude. Obtain information from local geological survey office
or library.
2. Find the acceleration due to gravity for sea level from its chart.
2. Subtract the free air correction for altitude from its chart.
3. Divide the result, calculated in step 3, by the standard gravitational factor 980.665
cm/sec/sec.
4. Calculate the reverse of the calculation in step 4 by dividing it into 1.
5. Multiply the weight given for each check point in the calibration charts by the inverse
factor, calculated in
step 5, and use this corrected weight with the original check point readings.
CHAPTER 6
Manual Loader
(2000-600-02)
The 2000-600-02 Manual Loader is designed as an integral component of the CDI SURETEST
Torque Calibration System providing a precision output torque of up to 2000 ft lb while requiring
only 8 ft lb input.