Appendix b – Advantech Data Acquisition Modules ADAM 4000 User Manual
Page 381
Appendix B
Appendix B Data Formats and I/O Ranges B-5
Thermocouple
Type
Temperature Range
(Degrees)
Temperature Range
(Hex)
J
0° C to 760° C
0000h - 7FFFh
T
-100° C to 400° C
E000h - 7FFFh
R
500° C to 1750° C
2492h - 7FFFh
The given span of the specified range is used to determine the RTD
input ranges for twos complement hexadecimal values. For an example,
if the nickel RTD is specified for the range -80
o
C to +100
o
C, the
corresponding values in hexadecimal notation would be 8000h to
7FFFh.
B.1.4 Ohms
To indicate ohms, set bits 0 and 1 of the data
format/checksum/integration time parameter to 11. This data format is
only valid for ADAM-4013 analog input module.
The ohms format allows you to read the value of the RTD resistance in
ohms. It consists of a “+” or “-” sign followed by five decimal digits
and a decimal point. The resolution (position of the decimal point) of
Platinum-Nickel RTDs is 10 m
Ω. (two decimal places).
For example, a 100
Ω platinum RTD specified for -100
o
C to +100
o
C
has +100
o
C corresponding to +138.50
Ω and -100
o
C corresponding to
+060.60
Ω.