WPS500 - Autonerdz
Contents
1. Start the vehicle s engine A waveform showing the pressure of the system will appear on the PicoScope display DO157 3 11 Releasing the pressure in the measurement chamber After each measurement some fluid will remain under pressure in the measurement chamber Follow the instructions below to release the pressure e Hold the transducer over a suitable container to catch the fluid expelled from the bleed vent The fluid released from the bleed vent may be under high pressure Position the transducer so that the fluid released cannot cause WARNING damage or injury e SLOWLY loosen the bleed screw by turning it counter clockwise Do not remove the screw from the transducer e Allow the fluid to emerge from the bleed vent e When no more fluid emerges tighten the bleed screw 12 DO157 3 Cleaning the measurement chamber If you are measuring the pressure of a liquid some of the liquid will remain in the measurement chamber after use To prevent cross contamination between liquids or between liquids and air you must clean the measurement chamber after use DISCONNECT all pressure hoses from the transducer DO NOT attempt to clean the measurement chamber when the unit is under WARNING pressure When disassembling the bleed valve for the first time hold the CAUTION transducer over an empty container in case any loose parts drop out e Remove the bleed screw and allow any liquid to drain out Yo2. bar It offers high resolution and accuracy for high pressure tests such as cranking and running cylinder compression or fuel pressure testing It is also helpful for identifying cam timing issues such as jumped timing belts and stretch timing chains especially on multi cam engines that may not have a cam sensor on each camshaft The WPS500X kit includes a specially designed compression hose for performing this test with a significantly reduced error and higher operating temperature range than conventional compression hoses and adapters Range 2 The second range measures from 15 psi 1 bar to 50 psi 3 45 bar This range is ideal for vacuum test and fuel system tests When testing these systems the zoom function is especially useful to analyze valve operation with the vacuum waveform or the injectors through the fuel waveform Range 3 The third range measures 5 to 5 psi 0 345 to 0 345 bar This setting is sensitive enough to analyze small pressures or pulses such as exhaust pulses from the tail pipe Zoom modes 1 to 3 The zoom feature operates by removing all of the voltage from the signal below 100 Hz and then magnifying the remaining signal Select the zoom using the zoom button shown in Section 6 Front panel controls Zoom 1 This mode multiplies the signal 10 times Zoom 2 This mode multiplies the signal 100 times For example let s say the transducer is connected to intake manifold vacuum on a running engine at
3. idle with the transducer set to mode 2 15 to 50 psi or 1 to 3 45 bar and the waveform on the scope is at 9 psi 0 6 bar The fluctuation in the signal caused by the valves opening and closing compared with atmospheric pressure forcing air into the manifold will be visible but will only make up a small portion of the overall signal Selecting the zoom function will bring the waveform up to the zero line remove the 9 psi portion and the fluctuations will be magnified making analysis of this component of the signal much clearer Zoom 3 Zoom level 3 multiplies the signal by about 1 000 times It is extremely sensitive and is suitable only for vacuum measurements DO157 3 9 8 Preparation for use Compatible fluid types The WPS500 is suitable for use with the following types of fluid Brake clutch and other hydraulic fluids Gasoline and diesel Air Water Before first use e Remove all packaging e Charge the internal battery For instructions see Section 10 Maintenance 10 DO157 3 9 Making a measurement Making a pressure measurement involves the following steps Each step is explained in more detail in the sections below Prepare the transducer Measure pressure Release the pressure in the measurement chamber Clean the measurement chamber Preparing the transducer Ensure that the transducer s internal battery is charged Unplug the charging cable from the transducer Before switc
4. WPS500 Automotive Diagnostic Pressure Transducer User s Manual This accessory complies with the following standards e Electromagnetic Compatibility EMC Directive 2004 108 EC e FCC Part 15 e Pressure Equipment Directive 97 23 EC Article 3 3 DO157 3 1 Safety terms and symbols Appearing in this manual WARNING statements identify conditions or practices that could result in injury or death WARNING CAUTION statements identify conditions or practices that could CAUTION result in damage to this product or other property Appearing on the product Danger of personal injury or property damage Refer to manual for details 2 DO157 3 2 General safety summary Please review the following safety precautions to avoid injury and prevent damage to this transducer or any equipment that is connected to it DO connect safely This transducer must be connected using only the pressure hoses and connectors supplied Pico Technology cannot accept responsibility for damage or injury caused by the use of unsuitable pressure hoses or connectors DO follow the vehicle manufacturer s safety instructions This is particularly important when connecting the transducer to pressurized fuel lines DO ground the unit when working with fuels When working on or near fuel systems you must connect the transducer to an electrical ground If you are using the transducer with a PicoScope oscilloscope connect a suit
5. able lead from any unused BNC connector on the front panel of the scope to the ground of the vehicle DO wear appropriate personal protective equipment Wear appropriate personal protective equipment PPE when working with pressurized fluids DO157 3 3 DO NOT exceed maximum working pressure To avoid injury do not use the transducer with pressures above 500 psi 34 5 bar DO NOT exceed maximum temperature The lithium polymer LiPo battery inside the transducer can be damaged by excessive heating Do not store or operate the unit at temperatures above 60 C 140 F DO NOT operate without covers To avoid equipment damage and personal injury do not operate this transducer with the covers removed DO NOT operate in wet or damp conditions To avoid incorrect readings and possible equipment damage do not operate this transducer in wet or damp conditions or submerge it in liquid The transducer is splash resistant but not immersion proof DO NOT operate in an explosive atmosphere To avoid personal injury and fire hazard do not operate this transducer in an explosive atmosphere DO NOT operate the transducer if damaged If you suspect there is damage to this transducer have it inspected by qualified service personnel Do not attempt to dismantle or repair it yourself DO NOT use with damaged or modified pressure hoses All the pressure hoses supplied by Pico have been pressure tested and must not be used if they have been di
6. arts of your WPS500 pressure transducer Signal output to oscilloscope USB charging port Front panel controls Bleed vent Signal output Use the BNC to BNC cable supplied to connect this to your oscilloscope Front panel controls See Section 6 USB charging port For battery recharging only no data connection Connect to any USB port on a computer or wall charger Inlet port Connect the pressure hose here Bleed vent When the bleed screw is opened this vent allows fluid to drain out of the measurement chamber Bleed screw Turn counter clockwise to open the bleed vent Remember to close it before making the next measurement DO157 3 6 Front panel controls Charging indicator Lights up when battery is charging Low battery indicator Lights up when power on but battery is low Range indicators Show which of the three ranges is selected Zoom indicators Show which of the three zoom modes if any is in use Power button Press once to switch on Press once again to switch off Keep the unit switched off when not in use to conserve battery power Battery fault indicator Lights up if there is a is problem with the battery DO157 3 7 Operating modes Ranges 1 to 3 Select the range using the Range button shown in Section 6 Front panel controls Range 1 The first range measures from 15 psi 1 bar to 500 psi 34 5
7. e USB charging cable provided e Leave the transducer to charge for 5 hours e Unplug the USB cable from the transducer before use Leaving the cable plugged in may affect measurement accuracy Repairs If the unit is damaged or stops working return it to Pico Technology or an authorized Pico distributor for repair Do not attempt to dismantle or repair the unit Replacing the bleed valve ball If the ball in the bleed valve is lost it can be replaced with a standard 0 25 inch 6 35 mm steel bearing ball To re seat the ball clean the port and then seat the ball using a brass drift Disposal The WPS500 contains a lithium polymer LiPo battery When the transducer reaches the end of its life take the entire unit to a battery recycling facility YOU MUST observe the instructions below Incorrect disposal of the battery could cause a fire or an explosion WARNI NG e Do not open the unit to remove the battery e Do not crush or shred the unit e Do not dispose of in fire 14 DO157 3 11 Specifications Inlet Pressure ranges Range 1 Range 2 Range 3 15 to 500 psi 15 to 50 psi 5 to 5 psi 1 to 34 5 bar 1 to 3 45 bar 0 345 to 0 345 bar Connector Male push fit Output Scaling 1 V 100 psi 1 V 10 psi 1 V 1 psi 6 89 bar 0 689 bar 0 0689 bar Offset typical Auto zeroing Connector BNC female fits Pico Technology cable TA082 Performance Accuracy 1 of scale 1
8. hing on disconnect any pressure source from the transducer A pressure source left connected will interfere with the self calibration procedure described below Switch on the transducer and wait until the three Range LEDs light up in sequence At the end of the sequence Range 1 LED remains lit showing that the transducer has finished its auto zeroing procedure The entire procedure should take less than 10 seconds Measuring pressure Ensure that the bleed screw is firmly closed Connect the appropriate pressure hose to the pressure sensing port Use only the pressure hoses and connectors supplied with the WPS500 Pico Technology cannot accept responsibility for damage or WARNING injury caused by the use of unsuitable pressure hoses or connectors Always check that the pressure hose is securely fastened to the transducer before pressurizing the system Always check for leaks WARNING when connecting the unit and to never leave it connected to a vehicle unattended especially when connected to fuel If measuring liquid pressure bleed any air out of the measurement chamber first Use the BNC cable supplied to connect the output of the transducer to the input channel of the oscilloscope Switch on the computer and run the PicoScope software In the PicoScope software select the Automotive menu and then the appropriate pressure test Press the Range button on the transducer to select the desired measuring range
9. ny interference received including interference that may cause undesired operation Pico Technology is a registered trademark of Pico Technology Ltd Manufactured in the United States Copyright Pico Technology Ltd 2009 16 D0157 3
10. of scale 5 of scale Response time 10 to 90 100 us 100 us filtered Power supply Type Built in LiPo battery not user serviceable Charging current 500 mA max at 4 75 V to 5 25 V from USB charger cable Charging connector USB mini fits Pico Technology cable TA081 Ambient operating temperature 60 C 140 F max Ambient storage temperature 60 C 140 F max Environmental protection Splash resistant against water gasoline diesel and hydraulic fluids Not immersion proof Weight 332 g 11 7 oz Dimensions 133 x 74 x 30 mm 5 2 x 2 9 x 1 2 in 12 Conversion factors The SI unit of pressure and vacuum is the pascal symbol Pa other units in common use These are some 1 bar 100 000 Pa 1 psi pound per square inch 6 895 Pa 1 inHg inch of mercury 3 386 Pa 1 inH2O inch of water 250 Pa 1 mmH O millimeter of water 10 Pa DO157 3 15 Issue history 1 1 6 09 First issue 2 14 7 09 Corrections to power LED description etc 3 21 9 09 Added FCC statement needle valve version Pico Technology James House Colmworth Business Park St Neots PE19 8YP United Kingdom www picoauto com This device complies with part 15 of the FCC Rules Operation is subject to the following two conditions 1 This device may not cause harmful interference and 2 this device must accept a
11. sassembled modified or damaged 4 DO157 3 3 Description The WPS500 automotive diagnostic pressure transducer allows quick and accurate pressure analysis of many automotive systems It can be used for many different pressure diagnostic applications saving the need to own several transducers for several applications It offers these features high resolution and accuracy auto zeroing built in zoom tool integrated bleed off pressure relief valve three pressure ranges The WPS500 is intended for immediate diagnostic purposes and CAUTION not long term or permanent use For example it should not be connected to a race car as a monitoring system DO157 3 5 4 Re ordering codes If you need to reorder spare parts please use the part numbers listed here WPS500 pressure transducer Part No Qty Description TAO60 1 WPS500 pressure transducer WPS500X pressure transducer kit If you purchased the WPS500 pressure transducer as part of the WPS500X kit you will have received the following items packaged with it Part No Qty Description TA081 1 USB to mini USB charging cable TA082 1 2 m 6 foot BNC to BNC cable TA083 1 Fuel adaptor TA084 1 Extension hose TA085 1 Vacuum hose TA086 1 Bleed hose TA087 1 Exhaust adaptor TA088 1 M14 compression hose DO157 1 WPS500 manual MI 220 1 Hard plastic carrying case 6 D0157 3 5 The p
12. ur WPS500 pressure transducer has either a ball valve or a needle valve as shown in the two drawings below WPS500 with ball valve WPS500 with needle valve If you have the type with a needle valve then please ignore the information in this manual concerning the ball valve e If the ball is still inside the ball valve allow it to drop out Clean and oil the ball with a non hygroscopic oil that is compatible with steel and aluminum Ordinary motor oil is suitable e If the ball needs replacing see Section 10 Maintenance e Clean the bleed screw Flush out the measurement chamber if necessary then replace the ball if present and the bleed screw DO157 3 13 10 Maintenance Cleaning the housing Clean the transducer s housing by wiping it with a rag moistened with clean water or water based detergent Allow the housing to dry before use Do not use fuel or any other solvent Do not use abrasive cleaning agents Do not submerge the unit in any liquid Do not dismantle the unit Do not use the unit until it is perfectly dry Recharging the internal battery e To charge using a computer switch on the computer and allow it to boot Disable any power saving modes to ensure that the computer does not switch off before recharging is complete Connect the transducer to the USB port of the computer using the USB charging cable provided e To charge using a USB wall charger connect the transducer to the charger using th
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