Displaying Temperature Conversion Value; Displaying Digital Value - LG G3F-TC4A User Manual

Chapter 2 SPECIFICATIONS

2.4.5 Displaying Temperature Conversion Value

The detected temperature value converted into through sampling processing of a thermocouple in-
put value times by ten and that is displayed as a digital value, which is called temperature conver-
sion value.
[Example] When a real temperature is 100.5°C

2.4.6 Displaying Digital Value

The thermocouple input module gives a digital value which has been calculated from a temperature
value to be suitable for process control of the PID control module. This value can be used as an in-
put value (Process Value) in the PID control module.
Thermo-
couple type
Overall
measuring
temp. range
Minimum
measuring
temperature
Digital value =
[Example 1] Digital value when a real temperature is 400°C of thermocouple type J.
Digital value =
[Example 2] Digital value when a real temperature is 700°C of thermocouple type K.
• Detected temperature value
( Digital value stored in the output variable TEMP of the reading function block.
Digital value stored in the internal memory)
Type K Type J
14000 10000
(-2000 (-2000
to to
12000) 8000)
-2000 -2000
16000
Overall measuring
temperature range
16000
10000
= 9600
16000
Digital value =
14000
= 10285.71428571 (round off at first digit of fraction)
= 10268
: 1005
Type E Type T Type B
7500 6000
(-1500 (-2000
to to
6000) 4000) 18000)
-1500 -2000
(temperature conversion value – minimum measuring temperature)
[4000-(-2000)]
[7000-(-2000)]
2 - 7
Type R Type S
14000 17500 17500
(4000 (0
to to
17500 17500)
4000 0
(0
to
0