Omega Model CYD211 User’s Manual
Operation 3-9
Table 3-3. Analog
Table 3-4. Analog Output
Output Range Scales
Scales In Sensor Units
Range
Numbe
r
Low
Output
High
Output
Input
Type
Low
Output
High
Output
0
0 K
20 K
Silicon Diode
0 V
10 V
1
0 K
100 K
GaAlAs Diode
0 V
10 V
2
0 K
200 K
PT-100, 250
Ω
0
Ω
1
k
Ω
3
0 K
325 K
PT-100, 500
Ω
0
Ω
1
k
Ω
4
0 K
475 K
PT-1000
0
Ω
10
k
Ω
5
0 K
1000 K
NTC RTD
0
Ω
10
k
Ω
3.9
ANALOG OUTPUT TO TEMPERATURE CONVERSION
The output current or voltage is directly proportional to the temperature
reading. For the 4
–
20 mA output, the following formula converts output
current to temperature:
T = A + B × I
OUT
where T = temperature in Kelvin, I
OUT
= output current in mA, and A and B
are constants from Table 3-5.
For the 0
–
10 V output, the following formula converts output voltage to
temperature:
T = C × V
OUT
where T = temperature in Kelvin, V
OUT
= output voltage, and C is a constant
from Table 3-5.
Table 3-5. Conversion Parameters for Temperature in K
4 – 20 mA
0 – 10 V
RANGE
TEMP. (K)
A (K)
B (K/mA)
C (K/V)
0
0
–
20
–5.00 1.2500 2.0
1
0
–
100
–25.00 6.2500 10.0
2
0
–
200
–50.00
12.5000 20.0
3
0
–
325
–81.25
20.3125 32.5
4
0
–
475
–118.75
29.6875 47.5
5
0
–
1000
–250.00
62.5000 100.0
