Campbell CR1000 User Manual

Section 7. Installation
200
Table 34. 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 one input. 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 one input. 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 terminal number preceded by a dash (-). Valid
arguments range from -1 to -16.
Differential
Channel
The differential analog input terminal number preceded by a dash (-). Valid
arguments range from -1 to -8.
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.
7.9.15 Measurement: PRT
PRTs (platinum resistance thermometers) are high-accuracy resistive devices used
in measuring temperature.
234

Campbell CR1000 Specifications

General

Power Requirements	9.6 to 16 VDC
Data Logger Operating System	CRBasic
Memory	4 MB
Analog Inputs	16 single-ended or 8 differential
Analog Input Resolution	13 bits
Analog Input Range	+/-2.5V
Digital I/O	8
Pulse Counters	2
Communication Ports	RS-232
Operating Temperature	-25°C to +50°C
Pulse Channels	4