Data Types And Formats; Variables - Campbell CR300 Series Product Manual

16.4 Data types and formats

Data takes different formats as it is created and manipulated in the data logger, as it is displayed
through software, and as it is retrieved to a computer file. It is important to understand the
different data types, formats and ranges, and where they are used.
See the CRBasic Editor help for additional data types and formats, and program examples:
https://help.campbellsci.com/crbasic/cr300/
Table 16-1: Data types, ranges and resolutions
Data type Description
IEEE four-byte
Float
floating point
four-byte
Long
signed integer
four-byte
Boolean
signed integer
String ASCII String
IEEE four-byte
IEEE4
floating point
IEEE eight-byte
IEEE8
floating point
Campbell Scientific
FP2
two-byte floating point
NSEC eight-byte time stamp

16.4.1 Variables

In CRBasic, the declaration of variables (via the
As that specifies the data type. The data types are Float, Long, Boolean, and
type descriptor
String. The default type is Float.
Example variables declared with optional data types
Public PTemp As Float, Batt_volt
Public Counter As Long
Public SiteName As String
.
Range
+/–1.8 *10^–38 to
+/–3.4 *10^38
–2,147,483,648 to
+2,147,483,647
–1, 0
+/–1.8 *10^–38 to
+/–3.4 *10^38
+/–2.23 *10^–308 to
+/–1.8 *10^308
–7999 to +7999
DIM
* 24
Resolution
24 bits
(about 7 digits)
1 bit
True (–1) or
False ( 0)
24 bits
(about 7 digits)
53 bits
(about 16 digits)
13 bits
(about 4 digits)
nanoseconds
PUBLIC
or the statement) allows an optional
Where used
variables
variables, output
variables,
sample output
variables,
sample output
internal calculations,
output
internal calculations,
output
output
variables, output
16. Working with data 79