PROCESS AUTOMATION

RESISTANCE TEMPERATURE DETECTION ( RTD )

One of Japanese customer asked for ClassA RTD at one of the meeting. I don't know what class A is. After meeting, I went online and look for ClassA type RTD. Below are some information I find out about ClassA RTD
 
IEC60751အရ Thin Film RTD ဧ။္ tolerance အေပၚမူတည္ျပီး Class ၃ မိ်ဳးခဲြျခားထားသည္။
1. Class AA (Formerly 1/3B) = ±(0.1+0.0017*t)°C or 100.00 ± 0.04Ω at 0°C
2. Class A = ±(0.15+0.002*t)°C or 100.00 ± 0.06Ω at 0°C
3. Class B = ±(0.3+0.005*t)°C or 100.00 ± 0.12Ω at 0°C
ထို႔အျပင္ IEC တြင္မပါ၀င္ေသာအမိ်ဳးအစားတခုရိွေသးသည္။
Class 1/10B = ±1/10 (0.3+0.005*t)°C or 100.00 ± 0.012Ω at 0°C

 

 ဥပမာ ClassA ဧ။္ tolerance သည္ Temp 100'C တြင္±0.35'C ရိွသည္။
အသံုးျပဳမည့္ေနရာကို လိုက္ျပီးသင့္ေတာ္ေသာ Class ကိုေရြးခ်ယ္ပါ။