Process Engineering Division – Instrumentation and Automation Section – Daily Topics – Topic No. 2020-12-04
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This post was last edited by It will be better tomorrow on 2020-12-4 07:39 in the Process Engineering Section – Instrumentation and Automation Forum – Daily Topics – Topic No. 2020-12-04. Discussion topic: The measurement range of the 316 and 1151GP pressure transmitters was originally 0–100 KPa; now the zero point has shifted by 100%. Then: 3. After a 100% positive shift of the zero point, what pressure input will result in an output of 4, 12, or 20 mA from the instrument? (Extra points will be given for a correct calculation process or detailed explanation)
4mA: 100kPa 10mA: 100+(8/16)*100=150kPa 20mA: 100+(16/16)*100=200kPa
The measurement range of the 1151GP pressure transmitter was originally 0–100 KPa; now the zero point has shifted by 100%. After the zero point shifts positively by 100%, the measurement range of the instrument becomes 100–200 KPa, with a corresponding output current of 4–20 mA. When 100 KPa is input, the instrument's output is 4 mA ； (Lower range limit) When 150 KPa is input, the instrument’s output is 12 mA ； 100+100*（12-4）/（20-4）=150KPa; when 200KPa is input, the instrument’s output is 20mA ； (Upper range limit)
The measurement range of the 1151GP pressure transmitter was originally 0–100 KPa; now the zero point has shifted by 100%. After the zero point shifts positively by 100%, the measurement range of the instrument becomes 100–200 KPa, with a corresponding output current of 4–20 mA. When 100 KPa is input, the instrument's output is 4 mA ； (Lower range limit) When 150 KPa is input, the instrument’s output is 12 mA ； 100+100*（12-4）/（20-4）=150KPa; when 200KPa is input, the instrument’s output is 20mA ； (Upper range limit)
After migration, the range is 100–200 kPa. For 4–20 mA: 4 mA corresponds to 100 kPa; 10 mA corresponds to 100 + (8/16)*100 = 150 kPa; 20 mA corresponds to 100 + (16/16)*100 = 200 kPa
4mA: 100kPa 12mA: 150kPa 20mA: 200kPa
The measurement range of the 1151GP pressure transmitter was originally 0–100 KPa; now the zero point has shifted by 100%. After the zero point shifts positively by 100%, the measurement range of the instrument becomes 100–200 KPa, with a corresponding output current of 4–20 mA. When 100 KPa is input, the instrument's output is 4 mA ； When 150 KPa is input, the instrument’s output is 12 mA ； 100+100*（12-4）/（20-4）=150KPa; when 200KPa is input, the instrument’s output is 20mA ；
After migration, the range is 100–200 kPa. For 4–20 mA: 4 mA corresponds to 100 kPa; 10 mA corresponds to 100 + (8/16)*100 = 150 kPa; 20 mA corresponds to 100 + (16/16)*100 = 200 kPa
4 ma at 100KPa； 12 ma at 150KPa ； It outputs 20 mA at 200 KPa.
The measurement range of the gauge for migration is 100 kPa to 200 kPa. When 100kP is input, the instrument outputs 4mA ； When 150kP is input, the instrument outputs 12mA ； When 200kP is input, the instrument outputs 20mA ；