Campbell Scientific SDM-INT8 8-Channel Interval Timer - Manual (Page 15)

SDM-INT8 8 Channel Interval Timer
The equation used to calculate the bit rate depends on the datalogger used.
The datalogger will round down to the next faster bit rate.
Equation for CR800, CR850, and CR1000:
bit_rate=INT((k*72)/625)*Resolution
Where:
k= the value entered in BitPeriod
Resolution=8.68 microseconds
Equation for CR3000:
bit_rate=INT((k*144)/625)*Resolution
Where:
k= the value entered in BitPeriod
Resolution= 4.34
μsec.
Equation for CR5000:
bit_rate=INT(k*20)*Resolution
Where:
k= the value entered in BitPeriod
Resolution=50 nsec.
5.2 Edlog Programming (Instruction “101”)
In Edlog, Instruction 101 (see Table 2) is used to address, command, and
retrieve data from the INT8. On the first execution of Instruction 101, the
INT8 is programmed. Subsequent executions of Instruction 101 may
command the INT8 to send its processed data to the datalogger or to
reinitialize its measurement process. If multiple INT8s are connected to a
datalogger, each INT8 must have a corresponding Instruction 101 and a unique
address.
The datalogger tracks the first time a 101 Instruction is executed to know if the
associated INT8 is programmed or not. If two or more 101 Instructions are
used to address the same INT8, the first execution of each Instruction will
program the INT8 returning no data. If the INT8 must be called more than
once per datalogger execution interval, place Instruction 101 in a subroutine
and call the subroutine when Instruction 101 must be executed. The INT8 is
programmed on the first call, with data being returned on subsequent calls.
9