Geokon 4910, Инструкция по эксплуатации

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7
4. DATA REDUCTION
4.1 Load Calculation
T
he basic units utilized by Geokon for measurement and reduction of data from Instrumented
Rockbolts are "digits". Calculation of digits is based on the following equation:
Digits =
�
1
Period
�
2
x 10
-3
or Digits
=
Hz
2
1000
Equation 1 - Digits Calculation
To convert the digits readings to load, the gauge readings for each cell must be multiplied by the
gauge factor supplied with the Instrumented Rockbolt.
L = (R
1
– R
0
) × G × K
Equation 2 - Load Calculation Using Linear Regression
Where;
L is the load in lbs. or kg. etc.
R
0
is the regression no-load reading in digits s supplied on the calibration report. (A sample
calibration report is given in Appendix B.)
R
1
is the current reading in digits
G is the gauge factor as supplied on the calibration report.
K is the conversion factor (optional) as listed in Table 1.
From
→
To
↓
Lbs. Kg. Kips Tons
Metric
Tonnes
Lbs. 1 2.205 1000 2000 2205
Kg. 0.4535 1 453.5 907.0 1000
Kips 0.001 0.002205 1 2.0 2.205
Tons 0.0005 0.0011025 2.0 1 1.1025
Metric
Tonnes
0.0004535 0.001 0.4535 0.907 1
Table 1 - Engineering Units Conversion Multipliers
For example:
If;
R
0
= 7138
R
1
= 8500
G = 8.092 .lbs per digit
Then;
L = (8500 − 7138) × 8.092 = 11,020 lbs.