Pressure transmitter settings for high and low pressure trip
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There is a project that requires meeting both the 2oo3 high-pressure trip condition and the 2oo3 low-pressure trip condition; is it possible to use 3 PTs in shared mode? Should three PTs be connected to both the high-voltage 2oo3 and the low-voltage 2oo3, or are 6 PTs required? Are there any relevant provisions in that standard? (Three PTs are led off from the process main respectively, without sharing a root valve or pressure tapping tube)
For the three pressure transmitters, it’s sufficient for them to set their own high-high and low-low alarm values in the configuration software