Campbell Scientific SDM-INT8 8-Channel Interval Timer - Manual (Page 13)

SDM-INT8 8 Channel Interval Timer
Function8_5: The Function8_5 parameter is a four digit code used to program
the timing function of channels 5 through 8. Similar to the Config parameters,
digits represent the channels in descending order from left to right (e.g., 8 7 6
5). See Section 6.3 for further details about these functions.
Code Description
0 No value returned
1 Period (ms) between edges on the programmed channel
2 Frequency (kHz) of edges on the programmed channel
3 Time (ms) between an edge of the previous channel and an edge of
the programmed channel
4 Time (ms) between an edge on Channel 1 and edge on the
programmed channel
5 Number of edges on channel 2 since last edge on channel 1 using
linear interpolation
6 Low resolution frequency (kHz) of edges on programmed channel
7 Total count of edges on programmed channel since last interrogation
8 Number of edges on channel 2 since last edge on channel 1 without
linear interpolation
Function4_1: The Function4_1 parameter is a four digit code used to program
the timing function of channels 1 through 4. It is identical in function to
Function8_5. The digits represent the channels in descending order from left to
right (e.g., 4 3 2 1).
OutputOpt: The OutputOption parameter is a numeric code that is used to
select one of the five different output options. The selected option will be
applied to all of the INT8 channels. A brief explanation is given below for
each code. See Section 6.4 for detailed explanations of each option.
0: Stores an average of the event data since the last time that the INT8 was
interrogated by the datalogger. If no edges were detected, 0 will be returned for
frequency and count functions, and 99999 will be returned for the other
functions. The INT8 ceases to capture events during communications with the
datalogger, thus some edges may be lost.
32768: Performs continuous averaging, which is utilized when input
frequencies have a slower period than the execution interval of the datalogger.
If an edge was not detected for a channel since the last time that the INT8 was
polled, then the datalogger will not update the Dest for that channel. The INT8
will capture events even during communications with the datalogger.
nnnn: Averages the input values over "nnnn" milliseconds. The datalogger
program is delayed by this instruction while the INT8 captures and processes
the edges for the specified time duration and sends the results back to the
datalogger. If no edges were detected, 0 will be returned for frequency and
count functions, and 99999 will be returned for the other functions.
-nnnn: Instructs the INT8 to capture all events until "nnnn" edges have
occurred on channel 1, until the datalogger addresses the INT8 with the
CaptureTrig argument true, or until 8000 events have been captured. When the
CaptureTrig argument is true, the INT8 will return up to the last nnnn events
for each of the programmed INT8 channels, reset its memory, and begin
capturing the next nnnn events. The INT8 waits for the first edge on channel 1
7