Campbell Scientific CR800 and CR850 Measurement and Control Systems - Manual (Page 237)

Section 7. Installation
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Table 37. Parameters for Analog Burst Mode (601 to 2000 Hz)
CRBasic
Analog
Voltage
Input
Parameters
Description when in Burst Mode
Destination
A variable array dimensioned to store all measurements from a single channel.
For example, the command,
Dim FastTemp(500)
dimensions array FastTemp() to store 500 measurements (one second of data at
500 Hz, one-half second of data at 1000 Hz, etc.)
The dimension can be any integer from
1 to 65535 .
Repetitions
The number of measurements to make on a single channel. This number
usually equals the number of elements dimensioned in the
Destination array.
Valid arguments range from 1 to 65535 .
Voltage Range
The analog input voltage range to be used during measurements. No change
from standard measurement mode. Any valid voltage range can be used.
However, ranges appended with 'C' cause measurements to be slower than
other ranges.
Single-Ended
Channel The single-ended analog input channel number preceded by a dash ( - ). Valid
arguments range from -1 to -6 .
Differential
Channel The differential analog input channel number preceded by a dash ( - ). Valid
arguments range from -1 to -3 .
Measure Offset
No change from standard measurement mode. False allows for faster
measurements.
Measurements
per Excitation Must equal the value entered in Repetitions
Reverse Ex No change from standard measurement mode. For fastest rate, set to False.
Rev Diff No change from standard measurement mode. For fastest rate, set to False.
Settling Time
Sample interval in µs. This argument determines the measurement rate.
500 µs interval = 2000 Hz rate
750 µs interval = 1333.33 Hz rate
Integ
Ignored if set to an integer. _50Hz and _60Hz are valid for AC rejection but are
seldom used in burst applications.
Multiplier
No change from standard measurement mode. Enter the proper multiplier.
This is the slope of the linear equation that equates output voltage to the
measured phenomena. Any number greater or less than
0 is valid.
Offset
No change from standard measurement mode. Enter the proper offset. This is
the Y intercept of the linear equation that equates output voltage to the
measured phenomena.
7.8.13 String Operations
String operations are performed using CRBasic string functions, as listed in String
Functions
(p. 480).