Campbell Scientific CR3000 CR3000 Micrologger - Page 241
String Operations
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Section 7. Installation 200 Table 39. 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 -28. Differential Channel The differential analog input channel number preceded by a dash (-). Valid arguments range from -1 to -14. 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. 504). 241