Campbell Scientific SDM-INT8 8-Channel Interval Timer - Manual (Page 25)

SDM-INT8 8 Channel Interval Timer
TABLE 5. Definition of Test Memory
Option Output
Output Definition
positive integer = ROM signature, good RAM
negative integer = ROM signature, bad RAM
0 =
bad ROM
-0 = bad ROM, bad RAM
A result of executing Option 9999-- is that the program residing in the INT8 is
deleted, and the INT8 goes into the low current drain standby mode. To initiate
INT8 measurements, SDMINT8 or Instruction 101 must be executed without
9999--.
6.5 Dest, Input Location, Multiplier, and Offset
For the SDMINT8 instruction, Dest is used to specify the array where the
results of the instruction are stored. For all output options except Capture All
Events (-nnnn), Dest argument should be a one dimensional array with as
many elements as there are programmed INT8 channels. If the Capture All
Events output option is selected, the Dest array must be two dimensional. The
magnitude of the first dimension should be set to the number of functions (up
to 8), and the magnitude of the second dimension should be set to at least the
maximum number of events to be captured. The values will be loaded into the
array in the sequence of all of the time ordered events captured from the lowest
programmed channel to the time ordered events of the highest programmed
channel.
For Instruction 101 the input location is designated in parameter 7. Except for
the Capture All Events Options, data from the INT8 are returned to the starting
input location in ascending programmed channel order. Output from Capture
All Events is returned directly to Final Storage in the datalogger.
Except for the "Test memory" option, the multiplier and offset are applied to
all results by the INT8 before they are returned to the datalogger.
For Low Resolution Frequency (Function 6), any value less then 1 is returned
as 0. This must be considered when calculating the multiplier and offset.
6.6 Edlog Output Format
The Output Option specifies the format of the output received by the
datalogger. The format of the three options that do averaging (Options 0, 0--,
and XXXX) are identical. A single value for each programmed channel is
stored in consecutive input locations starting at the location specified in
parameter 7, Instruction 101. If only three INT8 channels are programmed,
then only three Input Locations will be utilized. Output Processing
Instructions, such as Instruction 70 (Sample) must be used to store the results
in Final Storage.
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