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

Division: Emission Measurement Systems

Manufacturing Company: HORIBA UK Limited

Features
Specifications

900°C Exhaust Gas Limit	Allows 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 System	This 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 Transducers	Having 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 Compensation	The 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 Accuracy	Within ±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 Standards	CE, FCC, RoHS compliant
Dimensions	923 x 480 x 1204 H x W x D (mm)
Mass	115KG Approx.

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