PTFM-ONE-DT

Dual Pitot Tube Exhaust Flow Meter

The Dual Pitot Tube Flow Meter, PTFM-ONE DT 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, with a sampling rate of 1kHz to accurately measure highly pulsating exhaust flows. This rapid capture rate ensures that any pulsations or exotic behaviour caused by the engine is measured, and the unique design of the PTFM-ONE DT means reverse flows can be calculated, with the same guarantee of sensitivity.

The interface can run standalone with a laptop, or seamlessly integrated to run alongside a Test Automation System.

Segment: Automotive
Firma produkcyjna : HORIBA UK Limited
900°C Exhaust Gas LimitAllows the freedom to test engines under extreme conditions without worrying if the
flow meter can handle those temperatures
-1.25kPa to +7.5kPa
Sensor Range
Shows both positive flow & negative flow in the tailpipe. Also, HORIBA capped the
positive pressure at +7.5kPa to ensure we cause as little backpressure on your
engine as possible
Dual Tube SystemThis is the patented setup of 2 pitot tubes and a valve to switch automatically to
keep the system measuring with it best possible accuracy range. It uses the
smaller tube for flows below 4.5 m3/min and both tubes if flows peak above the
smaller tubes flow limit up to 14.5m3/min.
1Khz High Speed TransducersHaving fast sampling of the pressure changes in the tailpipe allow for a rapid visual
representation of the spikes and negative pulses that happen with a combustion
engine. Lower speed sampling would miss these spikes and negatives giving you
an inaccurate representation of what is happening inside the tailpipe.
Temperature CompensationThe PTFM-ONE automatically compensates to 20°C when testing so there is no
need to warm up.
Multiple Communication
Options
The PTFM-ONE has 2 connection options. LAN for AK connections to Automation
systems or the PTFM Host programme & Analogue out (0-10V with 4 configurable
channels available)
2 Options of
Absolute Pressure Sensors
The PTFM-ONE can be purchased in 2 absolute pressure ranges supporting testing
from sea level to a) 2100m or b) 4500m.
System Configuration
(Standard unit)
  • Dual Pitot Tube Setup (1 for low end & 1 for high end)
  • System Controller
Tube Diameter & Measuring Range

The System comes with a B & C Tube in parallel with each other and a valve in between.

  • B-type: f42.7 / f39.7 mm (0.15 m3/min to 4.5 m3/min)
  • C-type: f60.5 / f56.5 mm (0.3 m3/min to 10 m3/min)

Both B and C Tubes work in parallel with each other, providing a Max Flow of 14.5 m3/min.

Linearity

Either of the following:

  • Within ±2.0 % of full scale
  • 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
Flow Rate AccuracyWithin ±1 % of full scale or within ±1.5 % of readings (whichever larger) (at flow rate of 20 % of full scale)
Exhaust Pressure Sensor Range-1.25 – 7.5 kPa
Atmospheric Pressure Sensor Range
  • Standard configuration: 80 to 110 kPa
  • Optional configuration: 60 to 110 kPa
Environment for use
  • Temperature: -20ºC to +40ºC
  • Humidity: Under 80% as relative humidity
  • Altitude: 0m to 2100m above sea level *option for up-to 4500m
Approved StandardsCE, FCC, RoHS compliant
Dimensions923 x 480 x 1204 H x W x D (mm)
Mass115KG Approx.

 

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