Product Core Brief
- Model: P152.R4
- Brand: Emerson (Daniel Measurement and Control)
- Series: Spectra 600 Ultrasonic Flow Meter
- Core Function: Central processor board for acoustic transit-time flow computation
- Type: Processor Board / CPU Assembly
- Key Specs: DSP-based, RS-232/RS-485/Ethernet, rack-mounted PCB
- Condition: Refurbished (tested) or New Surplus — confirm at order
- ⚠️ Discontinued legacy spare; limited stock. Verify configuration before ordering.
Product Introduction
The Emerson P152.R4 is the central processor board inside the Daniel Spectra 600 ultrasonic flow meter electronics unit. It executes nanosecond-precision acoustic transit-time calculations for custody transfer measurement in natural gas and liquid pipelines.
The board generates transducer excitation pulses, measures upstream and downstream transit times, and converts raw velocity data into corrected volumetric and mass flow rates using AGA and ISO standard equations. In pipeline custody transfer applications, this processor is the computational core that produces the numbers used for billing and allocation.
Key Selling Points & Differentiators
- Nanosecond transit-time resolution. The DSP core measures acoustic signal transit times with precision required for custody transfer accuracy. This is not a general-purpose PLC card — it is metering-grade hardware.
- AGA/ISO flow equation execution. Converts velocity, pressure, and temperature data into corrected flow rates per industry standards. The board runs the flow computation algorithms directly.
- Configuration backup required before swap. The processor stores meter path geometry, calibration factors, and fluid coefficients. Download the configuration file using Daniel meter software before removal. Loss of this data can void custody transfer certification .
- Not a DeltaV or Ovation module. Despite supplier listings that confuse this part number with other Emerson products, the P152.R4 is specifically the Spectra 600 processor board . Confirm your system before ordering.
- Not recommended without a configuration backup. If the original board‘s configuration cannot be downloaded before failure, replacement requires full meter re-calibration. Plan for this contingency.
- Test evidence available. Power-on self-check and communication handshake verification. Test report provided with shipment.
