Campbell Scientific CS616 CS616 and CS625 Water Content Reflectometers - Page 21

Range Option, SE Chan, No. of Cycles, Timeout, Offset

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CS616 and CS625 Water Content Reflectometers Reps: Enter the number of CS616s that will be measured with the instruction. The sensors must be wired in consecutive channels. Each measurement uses the same multiplier and offset. Range Option: Enter 2-digit integer to choose output as period in microseconds and range. Suggested value for CS616 is 04. Code x1 x2 x3 x4 Max. Freq. 8 kHz @ 2 mV peak-to-peak 20 kHz @ 3 mV peak-to-peak 50 kHz @ 12 mV peak-to-peak 200 kHz @ 2 V peak-to-peak Where: x = 0 Output period in microseconds x = 1 Output frequency in kHz SE Chan: Enter the single-ended analog channel where the sensor green wire is connected. When Reps are greater than 1, this entry is the channel for the first CS616. No. of Cycles: Enter the number of cycles of the input signal the instruction uses to determine period. A value of 100 is recommended. Timeout: Enter the maximum amount of time for the no. of cycles to occur. A value of 1 (10 millisecond) is recommended. Loc: Enter the input location that will store the period measurement. The period output is in microseconds. An Input Location is a place in the datalogger's memory where a measurement is temporarily stored until it is used in intermediate storage, output, or overwritten. An input location is reserved for each measurement in the datalogger program. Additional locations can be created by the user. Mult: A factor that the input location value is multiplied by. A multiplier is often used for calibration or to convert the input location value to different units. Offset: A constant that is added to the input location value. An offset of 0 has no effect on the input location value. An offset is often used for calibration or to convert the data to different units. With a multiplier of 1 and an offset of 0, P27 returns the period in microseconds or frequency in kHz as selected by parameter 2. 15

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CS616 and CS625 Water Content Reflectometers
Reps
: Enter the number of CS616s that will be measured with the instruction.
The sensors must be wired in consecutive channels. Each measurement uses
the same multiplier and offset.
Range Option
: Enter 2-digit integer to choose output as period in
microseconds and range.
Suggested value for CS616 is 04.
Code
Max. Freq.
x1
8 kHz @ 2 mV peak-to-peak
x2
20 kHz @ 3 mV peak-to-peak
x3
50 kHz @ 12 mV peak-to-peak
x4
200 kHz @ 2 V peak-to-peak
Where: x = 0
Output period in microseconds
x = 1
Output frequency in kHz
SE Chan
: Enter the single-ended analog channel where the sensor green wire
is connected.
When Reps are greater than 1, this entry is the channel for the
first CS616.
No. of Cycles
: Enter the number of cycles of the input signal the instruction
uses to determine period.
A value of 100 is recommended.
Timeout
: Enter the maximum amount of time for the no. of cycles to occur.
A
value of 1 (10 millisecond) is recommended.
Loc
: Enter the input location that will store the period measurement. The
period output is in microseconds.
An Input Location is a place in the datalogger's memory where a measurement
is temporarily stored until it is used in intermediate storage, output, or
overwritten.
An input location is reserved for each measurement in the
datalogger program.
Additional locations can be created by the user.
Mult
: A factor that the input location value is multiplied by.
A multiplier is often used for calibration or to convert the input location value
to different units.
Offset
: A constant that is added to the input location value.
An offset of 0 has
no effect on the input location value.
An offset is often used for calibration or to convert the data to different units.
With a multiplier of 1 and an offset of 0, P27 returns the period in
microseconds or frequency in kHz as selected by parameter 2.
15