By Pete Anson, Senior Product Manager, Liquid Analytical Instrumentation
Averting regulatory violations and fines. Avoiding system disruptions. Maintaining effective monitoring in complex applications. How do you tackle these kinds of age-old plant monitoring problems? New technologies in advanced analyzers offer innovative, but simple ways to address these challenges.
For example, a unique capability of the Rosemount Analytical 56 four-wire analyzer enables continuous flow measurement and totalized volume including flow rates, in addition to pH, ORP, ISE, conductivity, and other typical liquid measurements like dissolved oxygen and turbidity. The 56 can accept pulse flow type inputs and receive 4-20mA input from any flow meter to display and output flow values to a host DCS or a PLC via raw current outputs or HART® or Profibus® communications. An analyzer that measures dual-input flow allows reporting values like flow ratio, percent recovery, percent flow ratio, flow difference and totalized difference. In addition, the 56 can power and receive the 4-20mA signal from any 24vdc 2-wire transmitter. Only one AC or DC power source is needed to power the 56 analyzer, which then powers up to two loop-powered transmitters for the flow inputs and the analytical inputs.
Some examples of applications for these kinds of advanced analyzers include:
Monitor flow rate at an outfall point
Use the 56 to report blind transmitter values
Use the 56 to totalize flow input from a transmitter
Pass-through of flow values and totalized flow values to host via HART or 4-20mA outputs
Or do the same using wireless transmission using a THUM wireless adaptor
The Smart Wireless THUM Adapter is a device that can retrofit on any existing two or four-wire HART device, and it enables wireless transmission of measurement and diagnostic information that was previously not available. It’s an easy way to gain access to the field intelligence already in the plant. Key benefits include:
Extend predictive intelligence to areas not possible before due to technical
or economic reasons
Make any HART device wireless to enable new measurement points
Gain access to advanced instrument diagnostics
Remotely manage devices and monitor device health
Efficiently gather data from multivariable devices
Enable enhanced valve capabilities.
What are your ideas to utilize flow input with a four-wire 56 analyzer? Does the possibility of releasing stranded diagnostics with wireless sound like something worth investigating? We would like to hear your questions.