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Section 7. Installation
262
NSEC —Convert Timestamp to Universal Time
'This program example demonstrates the use of NSEC data type to convert a data time stamp
'to universal time.
'
'Application: the CR6 needs to display Universal Time (UT) in human readable
'string forms. The CR6 can calculate UT by adding the appropriate offset to a
'standard time stamp. Adding offsets requires the time stamp be converted to numeric
'form, the offset applied, then the new time be converted back to string forms.
'These are accomplished by:
' 1) reading Public.TimeStamp into a LONG numeric variable.
' 2) store it into a type NSEC datum in final-data memory.
' 3) sample it back into string form using the TableName.FieldName notation.
'Declarations
Public
UTTime(3)
As String
* 30
Dim
TimeLong
As Long
Const
UTC_Offset = -7 * 3600
'-7 hours offset (as seconds)
DataTable
(TimeTable,true,1)
Sample
(1,TimeLong,Nsec)
EndTable
'Program
BeginProg
Scan
(1,Sec,0,0)
'1) Read Public.TimeStamp into a LONG numeric variable. Note that TimeStamp is a
' system variable, so it is not declared.
TimeLong = Public.TimeStamp(1,1) + UTC_Offset
'2) Store it into a type NSEC datum in final-data memory.
CallTable
(TimeTable)
'3) sample time to three string forms using the TableName.FieldName notation.
'Form 1: "mm/dd/yyyy hr:mm:ss
UTTime(1) = TimeTable.TimeLong(1,1)
'Form 2: "dd/mm/yyyy hr:mm:ss
UTTime(2) = TimeTable.TimeLong(3,1)
'Form 3: "ccyy-mm-dd hr:mm:ss (ISO 8601 Int'l Date)
UTTime(3) = TimeTable.TimeLong(4,1)
NextScan
EndProg
7.7.9 Data Output: Wind Vector
The
WindVector()
instruction processes wind-speed and direction measurements
to calculate mean speed, mean vector magnitude, and mean vector direction over a
data-storage interval. Measurements from polar (wind speed and direction) or
orthogonal (fixed East and North propellers) sensors are supported. Vector
direction and standard deviation of vector direction can be calculated weighted or
unweighted for wind speed.
Содержание CR6 Series
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Страница 76: ...Section 5 Overview 76 FIGURE 20 Half Bridge Wiring Example Wind Vane Potentiometer ...
Страница 80: ...Section 5 Overview 80 FIGURE 23 Pulse Input Wiring Example Anemometer ...
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Страница 251: ...Section 7 Installation 251 FIGURE 46 Running Average Frequency Response FIGURE 47 Running Average Signal Attenuation ...
Страница 454: ...Section 8 Operation 454 FIGURE 104 Narrow Sweep High Noise ...
Страница 459: ...Section 8 Operation 459 FIGURE 106 Vibrating Wire Sensor Calibration Report ...
Страница 535: ...Section 8 Operation 535 8 11 2 Data Display FIGURE 121 CR1000KD Displaying Data ...
Страница 537: ...Section 8 Operation 537 FIGURE 123 CR1000KD Real Time Custom ...
Страница 538: ...Section 8 Operation 538 8 11 2 3 Final Storage Data FIGURE 124 CR1000KD Final Storage Data ...
Страница 539: ...Section 8 Operation 539 8 11 3 Run Stop Program FIGURE 125 CR1000KD Run Stop Program ...
Страница 541: ...Section 8 Operation 541 FIGURE 127 CR1000KD File Edit ...
Страница 542: ...Section 8 Operation 542 8 11 5 PCCard Memory Card Management FIGURE 128 CR1000KD PCCard Memory Card Management ...
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Страница 549: ...Section 9 Maintenance Details 549 FIGURE 133 Separate Back Shell from Module FIGURE 134 Disconnect Battery Connector ...
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Страница 610: ...Section 11 Glossary 610 FIGURE 137 Relationships of Accuracy Precision and Resolution ...
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