Campbell Scientific SDM-AO4A Four Channel Analog Output Module - Manual (Page 13)

SDM-AO4A Four Channel Analog Output
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.
7.2 Edlog
The Edlog dataloggers are programmed with the SDM-AO4 Instruction 103
(See Table 4):
SDM-AO4 (P103)
1: 1
Reps
2: 00 SDM Address
3: 0000 Loc [ _________ ]
The number of repetitions, Parameter 01, specifies the total number of SDM-
AO4A output channels to be set. The address of the first SDM-AO4A is
specified with Parameter 02, multiple SDM-AO4As must have consecutive
addresses. Parameter 3 is the starting Input Location containing the first
millivolt level to be output on the first channel of the first SDM-AO4A.
Subsequent millivolt levels must be contained in consecutive Input Locations
immediately after the first Input Location specified in Parameter 3.
For example, two SDM-AO4As can be used to output eight voltage levels
which are contained in Input Locations 15 through 22. There are eight
repetitions, so eight (8) will be entered for Parameter 1. The SDM-AO4As
must have consecutive addresses (e.g., 31 and 32), and Parameter 2 would
contain 31 in this case. Fifteen (15) will be entered for Parameter 3.
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