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01 May 2003

An alarming interval

Within every HART smart transmitter, there are up to four dynamic variables. A HART Interface Monitor can extract up to three of the four as independent 4–20 mA signals and even provide alarming functions with relay outputs:

• Density signal from a Coriolis mass flowmeter
• Temperature measurement from a multivariable or pH transmitter
• Valve stem position feedback (With open/closed status)
• Pressure, differential pressure, and temperature from a multivariable mass flow transmitter