Operator`s manual

SECTION 11. OUTPUT PROCESSING INSTRUCTIONS
11-7
More than one Rainflow Histogram can be
calculated using the Repetitions parameter. The
swath of input data, the size of the mean and
amplitude dimensions, the low and high limits of
the input data, and minimum distance between
peaks and valley are all selectable by the user
with parameters.
Data are output to Final Storage or to Input
Storage for further processing when the
datalogger's Output Flag is set. Partial
accumulations are kept in Intermediate Storage.
PAR. DATA
NO. TYPE DESCRIPTION
01: 2 Repetitions
02: 4 Input location of input data
03: 4 Swath (per rep) of data at input
location; 1 = on line processing
04: 4 No. of Mean bins
05: 4 No. of Amplitude bins
06: FP Low limit of input data
07: FP High limit of input data
08: FP Minimum distance between peak
and valley
09: 2 Option (AB)
A: Form 0 = closed, 1 = open form
B: Output 0 = fraction, 1 = counts
10: 4 Input location to start storing
histogram. Enter 0 to send
output directly to Final Storage.
Execution time: 6.5 - 7.0 msec, with 60
Amplitude Bins and 1 Mean Bin.
Intermediate Storage locations required: Reps x
(Bins+2 x (No. Amplitude Bins) + 4), where Bins
= No. Means Bins x No. Amplitude Bins.
*** 82 STANDARD DEVIATION IN TIME ***
FUNCTION
Calculate the standard deviation (STD DEV) of a
given input location. The standard deviation is
calculated using the formula:
S = ((ΣX
i
2
- (ΣX
i
)
2
/N)/N)
1/2
where X
i
is the ith measurement and N is the
number of samples.
PAR. DATA
NO. TYPE DESCRIPTION
01: 2 Repetitions
02: 4 Starting input location no.
Outputs generated: 1 for each repetition