Manual Number: 00650-014-4
Page 2-4
AD12-8 Manual
S
signifies that the channel is skipped; i.e., not used.
U
signifies that the channel is unskipped; i.e., treated as a normal A/D input.
Card code 1:
An AT16-P sub-multiplexer is attached. Immediately following the 1: card
code will be a unit-of-measure code. Possible codes are F (units are degrees
Fahrenheit), C (units are degrees Celsius), and N (no units specified). Note:
If N is used but a thermocouple is installed, then the default is degrees F.
Following the unit-of-measure code is a series of 16 channel-code letters or numbers that deter-
mine how the channel is to be used. Any of the following codes may be used for each channel:
S:
The channel is skipped; i.e., not used.
U:
The channel is used (gain code 0).
T:
The channel is used for a thermocouple reference junction
t,k,j,e,r,s,b,a,u:
The channel is used with the indicated thermocouple type or platinum RTD
attached. (a is used for RTDs with an alpha of 392 and u is used for
RTDs with an alpha of 385.)
A:
The channel is to have automatic gain ranging. Note that the AIM-16 gain
switches must be set for programmable gain for automatic gain ranging to
work properly.
0,1,2,3,4,5,6,7:
The channel is to be set to the indicated gain. Gains associated with these
code numbers are defined in the gain table contained in TASK 4s reference
in
CHAPTER 5: AD12-8 DRIVER REFERENCE
. The AT16-P gain
switches must be set for programmable gain for this function to work
properly.
Card Code 2:
An LVDT8-P sub-multiplexer card is attached. Following the card code is
a series of eight channel-code letters that define how the channels are to be
used. The letters are U for unskipped and S for skipped.
Voltage Range
Values indicate the voltage range that has been selected by jumpers on the card. Possible values are
either 5 or 10.
Bipolar/Unipolar Mode
A B signifies that the card is set to bipolar mode while a U indicates that the card is set to the
unipolar mode.
IRQ Level
Values indicate which IRQ interrupt level will be used. Allowable values are 2 through 7. If the
setup program is used, it will put a 0 on this line if no interrupt level is selected. If the driver detects
a 0 on this line, it installs a default of IRQ3.
