WPS500X Pressure Transducer
With the unparalleled resolution and accuracy of the WPS500X Automotive Pressure Transducer you can perform a quick and accurate pressure analysis of many automotive systems.
Often, problems reported by customers can have many potential causes, and simply reading fault codes leaves you no closer to a solution. In addition to the comprehensive electrical testing provided by PicoScope, the addition of a WPS500X provides you with that same detailed insight into the engine system for accurate diagnosis of common problems such as:
- No start
- Loss of power
- Engine noise
- Emissions fault
With the unparalleled resolution and accuracy of the WPS500X Automotive Pressure Transducer you can perform quick and accurate pressure analysis on many automotive systems.
- Accurately measure up to 500 psi (34 bar)
- Ultra-fast 100 µs response time
- Zoom function for enhanced analysis capabilities
- Internal rechargeable LiPo battery
- Integrated pressure relief / bleed-off valve
- Auto zeroing
- High noise immunity
- Temperature compensated
The WPS500X features an extremely fast 100 µs response time from 0% to 90% of full scale and sensitivity down to about 0.07 psi (5 mbar). This provides you with an accurate representation of rapidly changing signals that span a broad pressure range.
Use the WPS500X with PicoScope to reveal how your engine is actually performing with minimal intrusion. Compression, airflow, valve timing and back pressure can all be measured in one hit.
The WPS500X has three pressure ranges to allow accurate measurement and analysis of many automotive pressures including cylinder compression, fuel pressure, intake manifold vacuum and even pulses from the exhaust.
|Range||Pressure range||Accuracy||Response time||Output scaling|
|1||–15 to 500 psi
–1 to 34.47 bar
|1% of scale||100 µs||10 mV/1 psi
(500 psi = 5 V)
|2||–15 to 50 psi
–1 to 3.45 bar
|1% of scale||100 µs||100 mV/1 psi
(50 psi = 5 V)
|3||–5 to 5 psi
–0.34 to 0.34 bar
|5% of scale||filtered||1 V/1 psi
(5 psi = 5 V)
Range 1 (High Pressure)
The first range gives you high resolution and accuracy for high-pressure tests such as cranking and running cylinder compression or fuel pressure testing. Not only is this test a great way for you to find compression issues, but it is also an excellent way for you to identify cam timing issues such as jumped timing belts and stretched timing chains — this is especially useful on multi-cam engines that may not have a cam sensor on each camshaft.
Range 2 (Medium Pressure)
The second range measures from –15 to 50 psi (approximately –1 to 3.45 bar). This range is ideal for vacuum tests and fuel system tests. When testing these systems you will find the zoom function is especially useful as it makes it easy to analyze the valves operating with the vacuum waveform, or the injectors through the fuel waveform.
Range 3 (Low Pressure)
With the third range you can measure –5 to 5 psi (approximately –0.34 to 0.34 bar). This setting is sensitive enough to allow you to analyze small pressures or pulses such as pulses from the exhaust.
The following is a selection of case studies and guided tests on the Pico Auto website.
- Engine non-start The engine will not start after a major overhaul. Compression and valve timing have been checked and are correct.
- Misfire The topic of this case study is not so much "How we managed to diagnose the fault in question" but more about the multiple options at our disposal when it comes to diagnosing component failure.
- Sudden power loss I admit that the fix is probably quite obvious using the parts darts technique or best guess scenario, but I thought this particular job demonstrated the use of the WPS500 as an everyday aid to speed up the diagnostic process.
- Misfire This story concerns an employee of Pico Technology and their journey to the office. About one mile from work the owner of this 54,000 mile Smart Fortwo started to experience a very noticeable misfire.
- Variable nozzle turbine pressure control I was fortunate enough recently to get hold of a WPS500X Pressure Transducer and looked forward to using it right away. It didn’t take long before I found a perfect excuse to switch it on: the Variable Nozzle Turbine (VNT) boost control.
- Fuel pressure - negative priming (diesel)
- Turbocharger operation (petrol)
- Common rail diesel injector back-leakage testing
- WPS500X In-cylinder compression – cranking (petrol)
- Triggered cranking exhaust test
- WPS500X - Intake manifold pressure, non-turbo non-variable valve lift
- WPS500X - Petrol intake manifold pressure (snap WOT)
- WPS500X - Petrol intake manifold pressure (running)
- WPS500X - Petrol intake manifold pressure, cranking (non-turbo)