Campbell Scientific CR9000X Measurement and Control System - Manual (Page 213)

Section 6. Data Table Declarations and Output Processing Instructions
Given this, the count would be output to bin:
C(1,1) when 0 ≤ Amp < 200 and -500 ≤ Mean < 0
C(1,2) when 200 ≤ Amp< 400 and -500 ≤ Mean < 0
C(1,3) when 400 ≤ Amp < 600 and -500 ≤ Mean < 0
C(1,4) when 600 ≤ Amp < 800 and -500 ≤ Mean < 0
C(1,5) when 800 ≤ Amp < 1000 and -500 ≤ Mean < 0
C(2,1) when 0 ≤ Amp < 200 and 0 ≤ Mean < 500
C(2,2) when 200 ≤ Amp< 400 and 0 ≤ Mean < 500
C(2,3) when 400 ≤ Amp < 600 and 0 ≤ Mean < 500
C(2,4) when 600 ≤ Amp < 800 and 0 ≤ Mean < 500
C(2,5) when 800 ≤ Amp < 1000 and 0 ≤ Mean < 500
Shown in a Table format:
Amplitude Column Bin Ranges
Mean Range 0 to 200 200 to 400 400 to 600 600 to 800 800 to 1000
-500 to 0
BIN 1 :
C(1,1) BIN 2 :
C(1,2) BIN 3 :
C(1,3) BIN 4 :
C(1,4) BIN 5 : C(1,5)
0 to 500
BIN 6 :
C(2,1) BIN 7 :
C(2,2) BIN 8 :
C(2,3) BIN 9 :
C(2,4) BIN 10 :
C(2,5)
Rainflow Example Continued: Assume a member is going through a stress
cycle with peaks and values shown in the graph below, using the instruction set-
up as shown previous in this example.
C Y C LIC S TR E S S
100
-500
450
50
200
-300
100
-500
-600
-400
-200
0
200
400
600
0 1 2 3 4 5 6 7 8 9
P eak Values
Stress/Strain Values
The first stress cycle that would be counted is from 50 to 200 as shown below.
The amplitude of this stress cycle is 150 and the mean is 125, so the count
would go into bin 6, the cycle removed, and the 450 point would be connected
to the -300 point.
CYCLIC STRESS
100
-500
450
50
200
-300
100
-500
-600
-400
-200
0
200
400
600
0 1 2 3 4 5 6 7 8 9
Peak Values
St
ress/
St
rai
n
Val
u
es
CYCLIC STRESS
100
-500
450
-300
100
-500
-600
-400
-200
0
200
400
600
0 1 2 3 4 5 6 7 8 9
Peak Values
St
ress/
S
tr
ai
n Val
u
es
6-29