Accessories
Hamilton Sundstrand offers all of the tools required for successful refinery and chemical processing installations. Some of the PIONIR accessories are described below.
Optical Duplexer
Your cost per measurement point can be reduced by using our optical duplexer. With the duplexer, two fiber optic cables are illuminated by the source. Each fiber optic cable goes to a separate probe. The return fiber from both probes goes to an optical switch in the PIONIR. This duplexer switches between the two return fibers. The duplexer is controlled by script can be programmed to use the two probes in any desired sequence. The selected return light is sent to the spectrograph for measurement. Switching time is less than one second, and no performance specifications are sacrificed in comparison to a single channel PIONIR
Optical Multiplexer
Multiple streams can be measured using one PIONIR. Using the multiplexer, up to eight fiber optic cables are illuminated by the source. Each fiber optic cable goes to a separate probe. The return fiber from each probe goes to an optical switch in the PIONIR. The multiplexer switches between the return fibers. The selected return light is sent to the spectrograph for measurement. The multiplexer is controlled by script that can be programmed to measure the probes in any desired sequence. Switching time is less than one second, and no performance specifications are sacrificed in comparison to a single channel PIONIR. The multiplexer is available with either 4 or 8 channels
Modbus Interface Accessory
A MODBUS protocol communications interface is available for use with the PIONIR 1024. The Hamilton Sundstrand MODBUS implementation allows bidirectional communications between your DCS and the PIONIR 1024.
Modbus communications allows you to pass any information desired between the PIONIR and your DCS. This allows you to incorporate important information beyond the estimated properties, such as instrument status indicators, optical throughput and spectrum quality indicators such as the Mahalanobis distance. By sending this additional information to the DCS, alarms can be set to indicate when service is needed. In addition, the DCS can send information to the PIONIR to initiate operations such as a manual probe wash, or a sample capture. Our MODBUS communications package is currently in use with several DCS systems, including the Honeywell TDC 3000, the Bailey Infi series and Foxboro.
Digital /Analog Input and Output Accessory
"Unlimited" digital and analog inputs and outputs are available using our customized I/O accessory. Digital I/O is typically used to control sample system valves and send alarms and status information to the DCS. Analog I/O may be used to send analytical data and diagnostics to and from the DCS.
Fiber Optic Communications Package
Used to communicate between the PIONIR, the RMS and the DCS using fiber optics. This may be required to meet area classifications, or to enable communications over long distances.
Sample Conditioning Systems
Sample conditioning systems are used to "clean up" the sample before it reaches the PIONIR probe by removing particles and water, and may also include temperature control. Hamilton Sundstrand's field-tested sample system is a modular design includes the following components:
Fast Loops
Comprises the fast loop tubing, self cleaning bypass filter, primary coalescing filter assembly, flowmeter, flow control, pressure gauges and a low pressure return point for the analyzer stream. The fast loop is equipped with isolation valves to block off the system from the process stream for maintenance purposes.
Analyzer Loop
Comprises a thermally stabilized enclosure for the PIONIR probe (supplied with main instrument), flow control, measurement and sample temperature control. Features a water blocking membrane filter with active drain back to the process return stream. Includes manual valves to facilitate introduction of calibration materials such as proto-fuels or toluene standards, introduction of solvents for probe cleaning and stream isolation bypass for filter maintenance. The system also includes an analyzer stream heat exchanger and conditioner to stabilize the sample temperature at 25 °C necessary for accurate correlation with lab generated measurements.
Stream Switching Manifold
The system allows multiple fast loops to be interfaced to a single fast loop filter panel. The system includes automated valves for flow, and bypass on multiple fast loop lines to allow fast loop stream switching.
Reference Stream (optional)
Automatic stream switching provides for a reference (calibrant) material (typically a pure component such as toluene) to flow through the probe at pre determined calibration intervals. This capability is critical to meet ASTM On-Line Analyzer Validation recommendations. It is not possible to meet this ASTM practice with direct insertion probes.
Solvent Wash Stream (optional)
A solvent stream is automatically switched into the analyzer flow lines for the purpose of removing contaminating deposits from the lines and analyzer cell.
Sample Capture (optional)
Sample collection vessels are located on a branch circuit from the fast loop after the coalescing filters. This allows "closed sample" collection under manual control or automatic collection when the model prediction threshold has been exceeded. This feature is very useful for collecting important samples to later include in the models to improve the accuracy.
