PTFM-1000V2

PTFM-1000 V2 Product Image

Pitot Tube Exhaust Flow Meter

The Pitot Tube Flow Meter, PTFM-1000V2 is a standalone interface for measuring exhaust gas flow rate of combustion engines. The system uses the tried-and-tested pitot tube principle with high-frequency transducers to accurately measure highly pulsating exhaust flows with a sampling rate of 1kHz. This rapid capture rate ensures that any pulsations or exotic behaviour in an engine is measured, and the unique design of the PTFM pitot tube means reverse flows can be measured with the same guarantee of sensitivity. The interface can be run standalone with a laptop, or seamlessly integrated to run alongside an analyser system without adding any more steps to the test cycle process.

Segment: Automotive
Produktionsfirma: HORIBA UK Limited

Key Features:

  • Direct exhaust measurement
    The interface provides a real-time display of exhaust flow well within the accuracy requirements of ISO 16183.
  • No interference to engine operation
    Fuel or air flow measurements are not required.
  • Eight sizes of flow tubes available
    A range of flow tube sizes are available (for flows of 2-65m3) to best match a given engine’s paramaters and maximize accuracy.
  • Automatic flow tube type detection
    The interface unit automatically detects the type of tube attached to it, and is instantly ready to use without any additional input from the operator.
  • Automated Zero and Purge Sequences
    The interface can be set to automatically zero the differential pressure transducers before a test and backflush the piping after a test – the system is fully automated once integrated into a cell.
  • Non-Invasive Measurement
    No sample is taken from the exhaust stream, so no compensation is required on the analyser’s end.
  • Annual calibration
    The tubes and interface are calibrated separately, so the tubes can be interchanged between any interface.
  • Multiple data output options
    10Hz analogue, RS-232 or LAN outputs are available.

 

Optional Features:

  • High Temperature Operation Exhaust pipe connections/seals are available for high temperature operation (900°C).
  • Exhaust Pressure Sensor (±10 kPa gauge) Additional sensor to measure tailpipe exhaust pressure.
  • Tailpipe Sample Fitting Integrated sampling point.
Test vehicle/engineDiesel (HDD, LDD), Gasoline, LPG and CNG vehicles, Ethanol, Propane, Butane
ConfigurationInterface unit connected to pitot tube via umbilical cable. Pitot tube can be standard (0 - 230ºC) or high temperature (0 - 900ºC)
Flow Rate AccuracyWithin ±1 % of full scale or ±1.5 % of readings (at flow rate of 20 % of full scale)
LinearityEither of the following:
(a) Within ±2.0% of full scale
(b) Intercept: |a0| ≤ 1.0% of full scale
Slope: 0.98 ≤ a1 ≤ 1.02
Standard estimated error: SEE ≤ 2.0% of full scale
Coefficient of determination: R2 ≥ 0.990
Response Time<1ms
Tube AttachmentsPitot tube size should be selected from the following list, according to tailpipe diameter and exhaust flow rate:
 Pilot TubeTube DiameterMax Flow
 A-type32.0 mm2.0 m3/min
 B-type42.7 mm4.5 m3/min
 C-type60.5 mm10 m3/min
 D-type76.3 mm15 m3/min
 E-type89.1 mm20 m3/min
 F-type101.6 mm30 m3/min
 G-type127.0 mm45 m3/min
 H-type152.4 mm65 m3/min
NoiseWithin 2.0% of full scale (at flow rate of 20% of full scale)
RepeatabilityWithin ±2.0% of readings (at flow rate of 20% of full scale)
CalibrationInterface calibrated every 12 months. Recommended pitot tube calibration every 12 months

 

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