
ZENO
®
-3200 USER MANUAL
Coastal Environmental Systems (206) 682-6048 Page D-3
The Running Average will not contain an average specified by the Running Average Time in Line
Item #5 until at least that much time has elapsed. Before the amount of time has elapsed as specified
by the Running Average Time, the Running Average will contain an average of fewer values over
less time.
The circular array contains the inputted data values that are referenced by Line Item #4.
ZENOSOFT® calculates the size of the circular array from Line Item #5, the Running Average Time
and the apparent frequency of how often new data is received by Line Item #4. The size of the
circular buffer is directly proportional to the Running Average Time and inversely proportional to the
frequency that data is inputted into the process.
The apparent frequency of how often data is inputted into the process is determined by the Sensor
Record which is the source of the data.
308
Determination of the apparent frequency (t
freq
) depends
upon the Sensor Timing Loop time
309
(t
loop
), the Sample Interval Time
310
(t
int
), the Sample
Duration Time
311
(t
dur
), and the Maximum Number of Readings
312
taken (n
max
).
Using the Running Average Time (A
time
) specified in Line Item #5, the size of circular buffer (A
size
)
is calculated using the following equation:
Data Output #7, the Data Invalid Flag (F
invalid
), is set high (1) when the Running Average is invalid or
is set low (0) when the Running Average is valid. Validity is determined by when the number of
values contained within the circular buffer (n
buff
) exceeds the value set in the Percent Valid Data
(P
valid
), specified in Line Item #6:
308
Data that originates from a Sensor Record may be pre-processed before being inputted into this Process Record.
309
Refer to Section 10.3.7.
310
Refer to Section 3.1.3.
311
Ibid.
312
Refer to Section 10.3.8.
poss
poss
poss
freq
loopdurposs
nn
n
t
nnn
n
t
t
ttn
max
max
int
maxmax
int
0,
,0,
freq
time
size
t
A
A
sizerunningrunning
A
i
irunning
ATx
xT
suze
1
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