Documentation Number TCDA0997 Manual
11
B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350
PH (815) 433-5100 -- FAX (815) 433-5104
Chapter 5: Voltage-to-Temperature
In standard TCDA modules the low temperature is -50
°
C and the
high temperature is 200
°
C. These temperatures correspond to an
output voltage between 0 and 5VDC. The Voltage-to-Temperature
Conversion Equation for standard TCDA modules is shown below.
NOTE: Do not use this equation if you have a modified TCDA
module.
The following values are used for standard TCDA modules:
-50
°
C < Temperature < 200
°
C
0VDC
<
Vout
<
5VDC
Vout is measured on DB-25 pin 8 ( pin 9 for channel 2)
resolution
=
20mV/
°
C = 0.02V/
°
C
Voff
=
-1.0VDC
TCDA modules with modified temperature measurement ranges
will be supplied with temperature range, values for Voff, and
resolution, and a modified Voltage-to-Temperature Conversion
Equation.
The Fahrenheit-to-Centigrade and Centigrade-to-Fahrenheit
Conversion Equations are shown below.
Voltage-to-Temperature Conversion Equation
Temperature C
Vout
Voff
resolution
° =
+
C-to-F and F-to-C Conversion Equations
(
)
C
F
= ×
−
5
9
32
F
C
= × +
9
5
32
