cheetha
Full Member level 2
Hi,
We are using diaphragm type Differential Pressure transmitters for level measurement of different vessels. Each vessel consists of two transmitters one with PLC loop (HIMA with current isolator card CS4/420) {let name it A} and other with DCS loop {let name it B}. The transmitter A show erratic behavior while transmitter B is relatively stable.
• Both transmitters are of identical model and make and have exact same configuration & installed at same vessel and diaphragms are located at adjacent locations,
• The grounding connections were found ok.
• When transmitter A is forced to any value the trend behaves normal and sets to a fix value
• The transmitter A was replaced with new one but behavior didn’t changed.
what could have caused transmitter to behave erratically.
Thanks in advance
We are using diaphragm type Differential Pressure transmitters for level measurement of different vessels. Each vessel consists of two transmitters one with PLC loop (HIMA with current isolator card CS4/420) {let name it A} and other with DCS loop {let name it B}. The transmitter A show erratic behavior while transmitter B is relatively stable.
• Both transmitters are of identical model and make and have exact same configuration & installed at same vessel and diaphragms are located at adjacent locations,
• The grounding connections were found ok.
• When transmitter A is forced to any value the trend behaves normal and sets to a fix value
• The transmitter A was replaced with new one but behavior didn’t changed.
what could have caused transmitter to behave erratically.
Thanks in advance