EthyleneInstrument
Electrical
- Mar 27, 2011
- 16
Firstly this is my first subject,Thanks for your response
I want to mesure level of tank which is replaced in column.
There are only 2 flanges to mesure level.
Steps of my calibration and problem:
Firstly I turn of 2 block valves which is replaced between flange and column.
Secondlly I replaced the diaphragm seals of yokogawa EJX118A on both of 2 flanges.
thirdly I opened drain(vent valve) valves of flanges.
Fourtly I connect yokogawa EJX118A with BT200 hand terminal and, I made zero calibration (after diaphram seals connected).
Fiftly I send value of span (184mmH2O) to transmitter.
sixtly I closed drain valves and opened block valves.
but When I looked at level Gauge , there is no level, but our transmitter shows 15% level.
I couldnt understand why 15% level occur?
I drained Level Gauge, but there isn't any proplem with level Gauge. There is not any level in tank. but gas of fluid filled in tank and pressure is about 21 bar.
I make these 6 steps, again but it shows same level.
note: process preesure of column is 21 bar
process temperature: -20 degrees celcius
Note2: Diaphram seals filled with ethylne glicol. So it can work at 20 to -50 degrees celcius. So that temperature (-20)musn't be problem
Can you offer something.
Thanks
I want to mesure level of tank which is replaced in column.
There are only 2 flanges to mesure level.
Steps of my calibration and problem:
Firstly I turn of 2 block valves which is replaced between flange and column.
Secondlly I replaced the diaphragm seals of yokogawa EJX118A on both of 2 flanges.
thirdly I opened drain(vent valve) valves of flanges.
Fourtly I connect yokogawa EJX118A with BT200 hand terminal and, I made zero calibration (after diaphram seals connected).
Fiftly I send value of span (184mmH2O) to transmitter.
sixtly I closed drain valves and opened block valves.
but When I looked at level Gauge , there is no level, but our transmitter shows 15% level.
I couldnt understand why 15% level occur?
I drained Level Gauge, but there isn't any proplem with level Gauge. There is not any level in tank. but gas of fluid filled in tank and pressure is about 21 bar.
I make these 6 steps, again but it shows same level.
note: process preesure of column is 21 bar
process temperature: -20 degrees celcius
Note2: Diaphram seals filled with ethylne glicol. So it can work at 20 to -50 degrees celcius. So that temperature (-20)musn't be problem
Can you offer something.
Thanks