Operating Manual AP29ECO
Contents
1. HUB 2000 Leak Detection System Probe Cable C21 ILS 500 F 4 Connector pilot air Sampling Probe AP29 Sampling hose ___y Gas cylinder Test object Test Fixture Gas line gt Figure 2 System based on table top Sensistor ISH2000 INFICON User s Manual AP29ECO 7 m 2 3 Test Sequence There are four major steps in the test sequence Timers are set in the Sensistor ISH2000 1 Accumulation 2 Sampling 3 Analysis 4 Purging See Figure 3 Accumulation During D seconds Sampling During B seconds Analysis During A seconds Set ACCEPT Set REJECT output output Purge sensor During C seconds To Standby Figure 3 Test sequence 8 INFICON User s Manual AP29 ECO Accumulation Timer D in APC Settings menu EN This is the delay time from that the test object is filled with tracer gas until a sample is taken from the test point Accumulation is used to improve the sensitivity of a test chamber The concentration in the test chamber will increase linearly during the accumulation time Sampling Timer B in APC Settings menu This is the time needed to draw a sample from the test point to the AP29 ECO If sampling time is too short the sample will not reach the sensor An excessively long sample time may pump away the sample in a small open chamber The setting of the Sampling time depends on sample hose length and diameter Test correct time for your set u2. m programmable logic controller This section describes the different signals used for controlling and interpreting the test 4 6 1 ILS500 Connect the AP29 ECO to ILS500 with a BUS cable If you have a Leak Detection Unit with integrated detector then that is all you need If you have an ILS500 F with the detector separate you will need an extra BUS cable and a hub see spare parts list Set up the controller in APC mode as described in the ILS500 manual To start a test sequence push the START button According to the settings of the ILS500 the test cycle will terminate automatically upon completion and a detected leak will be indicated by the red LEAK lamp 4 6 2 Manual switches For manual control you only need two switches and two lamps The other inputs and outputs are optional for manual operation Refer to Table 3 for manually operated functions A Warning The 24V pin in the bus is intended for the supply of power to switches etc Do not connect this pin to another power supply If you connect this pin to another power supply it can cause serious damage to the detector Function Signal name Bus Pin H2000P pin Read warning below 24VDC 25 C2 pin 1 2 Sample request NO0 4 C2 pin 6 Calibration request IN_1 5 C2 pin 7 Purge request optional IN 3 7 C2 pin 9 ACCEPT signal OUT _6 10 C3 pin 10 REJECT signal LEAK OUT 15 C3 pin 5 Power on signal optional DET_ON 1
3. The system calibration described above is in addition to the regular sensor calibration Sensor calibration should be performed at least weekly For partly or fully automated systems we recommend that sensor calibration is performed once per shift System calibration self test and sensor calibration can sometimes be combined into one single operation This can be achieved by using a calibrated leak master that is passed through the tester regularly The advantage with this method is that you get the most relevant test of the whole system Ask your detector supplier for a quotation on a calibrated leak master Do not use home made leak masters for calibration purposes A faulty leak master can jeopardise your production quality INFICON User s Manual AP29 ECO 37 m EN 38 INFICON User s Manual AP29 ECO 6 1 6 2 Preventive Maintenance The AP29 ECO has been designed for a minimum of maintenance The best way to keep maintenance at a minimum is to fit external fine grade filters on reference air and sample inlets Recommended filter grade is 40 um or finer A extra filter in the sample hose will of course add volume and time to each sample sequence The choice of filter or no filter in the sample line is therefore a balance between shortest possible cycle time and lowest possible maintenance Procedures for cleaning the port filters and for replacing the gas sensor are described in subchapters 6 3 and 6
4. Warning Always carefully secure gas bottles before connecting pressure regulator Compressed gases contain much energy Note The tracer gas used is a mixture of 5 Hydrogen H gt in 95 Nitrogen N3 It is not flammable non poisonous and environmentally friendly 4 INFICON User s Manual AP29 ECO 2 1 System Description Considerably higher sensitivities can be achieved for point testing applications by using the accumulation technique supported by the Sensistor ISH2000 software Consult your supplier for best system design for your particular application The AP29 ECO is equipped with two separate sniffer flow channels Sampling and Analysing flow This configuration makes it possible to perform true steady state measurements The constant sniffer flows are created by an electrical pump pulling air through two high precision ruby orifices A critical flow type situation is obtained The orifices are protected by built in filters The flow is supervised by two differential pressure switches activated by the pressure drop across the orifices The switches are factory set to open at 75 of the nominal sniffer flow The Sampling probe AP29 ECO is equipped with an overexposure protection mode purging the sensor with reference air as soon as the signal goes above the rejection threshold This reduces the recovery time of the sensor enabling the system to work with high speed testing applications The unit is also equipped
5. The box is fastened with four screws e Max thread diameter is 6 mm 0 25 e Max head diameter is 11 mm 0 43 Length is 20 mm 0 8 grip For placement of the screws see Figure 4 Cable Connections Sensor Cable Warning Turn off power before you connect or disconnect the sensor cable The sensor can be destroyed if power is on The sensor inside the AP29 ECO is connected to the Sensistor ISH2000 with a C21 cable Standard length is 3 m Several different cable lengths are available See sensor cable in Figure 5 Figure 5 Sensor cable Align the red mark on the cable contact with the red mark on the panel contact and push straight in The contact will snap in and lock To disconnect hold around the knurled part of the connector and pull straight out INFICON User s Manual AP29 ECO 4 2 2 4 3 Bus Cable Warning Always switch power off before disconnecting or connecting any cable Failure to comply with this rule can result in personal injury or serious damage to the equipment Caution The 25 pin D type connector on the back of the instrument is not a computer or printer port Connecting a printer or any other computer device may cause permanent damage to the connected device The bus cable carries control signals of the Active Probe Control APC system in the Sensistor ISH2000 The APC system controls the pneumatic and electric functions of the AP29 ECO The control cable is a 25
6. and other application notes edited by INFICON INFICON also offers training courses for application builders The calibration of your test system is also described under 5 7 below Read that section carefully Instructions on how to modify the setting of the different parameters can be found in the Sensistor ISH2000 manual 5 6 1 Parameters The parameters from 1 4 in the Table 7 are the general parameters Parameters from 5 10 are the sampling parameters They are further described in sections below Parameter Range Default value 1 Leak Rate Unit Max 12 characters PPM 2 Calibration coefficient 1 00E 37 1 00E37 1 00E 00 1 3 Calibration Time Min Calibration Time 30s 10s 4 Password Max 12 characters No password 5 Leak Alarm Level 1 00E 37 1 00E37 1 00E 01 10 6 Purge Level Leak Alarm Level 1 00E37 1 00E 02 100 7 Analysing time A 0 0 6000 0 s 10 0s 8 Sampling time B 0 0 6000 0 s Os 9 After test purging time C 0 0 6000 0 s Os 10 Accumulating time D 0 0 6000 0 s Os Table 7 General and sample parameters INFICON User s Manual AP29 ECO 33 EN m 34 General Parameters All general parameters described in this section except Password must be correctly set before you can optimise the test parameters 1 Leak Rate Unit Leak rates will be presented on the Sensistor ISH2000 display in this unit Leak rate unit is set to PPM as default You
7. ISH2000 Technical Manual The necessary software APC Compiler can be ordered from your supplier Modifications of the driver can also be ordered from the supplier INFICON User s Manual AP29 ECO 17 m 4 5 Pneumatic Connections for AP29 ECO Figure 6 shows the pneumatic connections of AP29 ECO Exhaust Reference air Sample inlet Reference gas Figure 6 Pneumatic connections of the AP29 ECO See Table 2 for more information about the pneumatic connections Type Specification Port thread Original tubing Exhaust Exhaust of the sample pump BSP 1 8 OD 8 0 mm Connect to ventilation system ISO 228 1 G1 8 Reference Air Hydrogen free ambient air BSP 1 8 OD ID 6 0 4 0 mm Preferably taken from outer wall of ISO 228 1 G1 8 the building Atmospheric pressure You must install an external filter in the reference air hose Sample Inlet This is the test port 150724 M5x0 8 ID 2 2 5 mm Typically 10 ppm H2 in Air 0 03 0 10 MPa 0 3 1 0 barg 4 5 15 psig 1SO 228 1 G1 8 Standard flow 3 atm cc s UNF1032 can nor mally be used Reference Gas See Sensistor ISH2000 User Manual BSP 1 8 OD ID 6 0 4 0 mm Table 2 Pneumatic Connection The M5 port is in a BSP1 8 to M5 converter The converter holds a filter disk protecting the manifold External filter is recommended to prolong service intervals of port filter External filter must have small internal vol
8. We call this test System Calibration A system calibration must be performed when the test system is new as well as after any modification or repair that in any way can influence the performance of the system The system calibration is best performed by using a reference leak or calibrated flow meter to set up a limit leak By introducing a limit leak in the system you can find the exact value that the detector records for that leak size Having this you can set your leak limit correctly No test chamber or sampling mouthpiece has a perfectly uniform sensitivity A leak in one corner can give a very different signal than the same leak would give in another corner Test the uniformity of your chamber If very non uniform try to improve your circulation INFICON User s Manual AP29 ECO me Note All accumulation chambers must have forced circulation for an even mixing of the sample Tracer gas will not spontaneously rise to top of chamber Density of tracer gas mix is same as air Note Do not rely on theoretical calculations alone when setting your alarm level Use a calibrated leak flow to test the overall system performance In addition to a system calibration we recommend that a self test is made at the start of every shift This self test should include a test of every step required for the safe detection of a leak This includes testing the gas filling sample mixing sampling sample analysis result reporting etc Note
9. Y01 negative terminal GND 1 C2 pin 3 OUT 2 Solenoid valve Y02 positive terminal OUT 21 C4 pin 7 GND Solenoid valve Y02 negative terminal GND 1 C2 pin 4 OUT_3 Solenoid valve Y03 positive terminal OUT 22 C4 pin 8 GND Solenoid valve Y03 negative terminal GND 2 C2 pin 5 OUT_4 Solenoid valve Y04 positive terminal OUT 23 C4 pin 9 GND Solenoid valve Y04 negative terminal GND 3 C3 pin 1 OUT_5 Solenoid valve Y05 positive terminal OUT 24 C4 pin 10 GND Solenoid valve Y05 negative terminal GND 11 C3 pin 2 CAL_CONF Sampling pump positive terminal OUT 9 C3 pin 9 GND Sampling pump negative terminal OUT 13 C3 pin 3 Master control signals DET_ON HIGH when detector power is on OUT 16 C3 pin 6 LEAK OUT REJECT Test result signal OUT 15 C3 pin 5 OUT_6 ACCEPT Test result signal OUT 10 C3 pin 10 DET_ERROR Summing error from detector or probe OUT 14 C3 pin 4 DET_WAIT HIGH while detector warms up OUT 18 C3 pin 7 DET_SIGNA LOW when sensor recovered to zero OUT 17 C3 pin 8 L IN_0 Measure request IN 4 C2 pin 6 IN_1 Calibration request IN 5 C2 pin 7 IN 3 Forced purge request IN 7 C2 pin 9 Table 1 Active Probe Control Signals 16 INFICON User s Manual AP29 ECO 4 4 Software Driver EN Sample Probe AP29 ECO is an accessory to the Hydrogen Leak Detector Sensistor ISH2000 Before you can use it the software driver must be installed in the Sensistor ISH2000 4 4 1 Equipment For driver installation you
10. are working as expected Make sure that the position of the sample inlet is as close as possible to the primary leak point The main application for the AP29 ECO is leak testing By placing the inlet close to the main leak point you minimise the risk that a malfunction in the test system will result in leaking objects being passed as not leaking An example is a broken circulation fan in a test chamber In this case if the sample inlet is placed far away from the leak the tracer gas will not reach the inlet By placing the inlet close to the primary leak point there is a good chance that the leak will be detected even if the circulation fan is broken Reference Gas The reference or calibration gas is used to calibrate the hydrogen sensor Gas sensors are inherently different from physical sensors in that they are less stable The sensitivity changes over time You will need to calibrate your sensor much more often typically every day for best accuracy Using reference gas is the most reliable and fast way of calibrating your sample probe Reference Gas Specification Typically 10 ppm Hydrogen in Air with certificate of analysis The exact hydrogen concentration should be within the range of 1 400 ppm For best accuracy order a concentration within 50 of the leak alarm level used For example if your alarm level is 10 ppm use a reference gas with 5 to 15 ppm Hydrogen Quality of constituents is not critical INF
11. can change this to whatever unit you prefer Note The leak rate unit is just a text string The leak values are converted to your unit by setting the correct Calibration coefficient C and K Factors in old program version For details refer to the Sensistor ISH2000 Manual 2 Calibration coefficient C and K factor in old program version For information on calibration coefficient settings refer to the Sensistor ISH2000 Manual 3 Calibration Time For reference gas calibration set Calibration Time 5 seconds For reference leak calibration use the routine for optimising the analysis time to find the correct setting for the Calibration Time For leak master calibration set Calibration Time Analysing time 4 Password We recommend that you password protect your parameters As default no password is set Refer to the Sensistor ISH2000 Manual for instructions on how to set a password Sampling parameters For shortest possible cycle times you should settle for simple ACCEPT REJECT testing That means that all signals below the leak limit are regarded acceptable and all signals above the limit leads to rejection of the test object No recording is being done on how much above or below the limit any particular test is Having made this decision you can set the probe to immediately terminate a test if the signal goes above the limit You can also set the analysing time a bit shorter than if you want to measure the size of l
12. will need the following e APC Driver software disk delivered with the AP29 ECO e File transfer cable delivered with the AP29 ECO PC computer with Windows 95 or later and with COM port Note that a USB to COM port converter can t be used For help contact the supplier 4 4 2 Instructions Follow the instructions below carefully 1 Check if driver has been installed before shipping a Switch the detector ON wait until start up sequence has terminated b Enter the APC Settings menu c Enter the Probe Type sub menu d If driver is installed you will find the correct driver name in the right position see label on driver disk To install driver insert the disk into the disk drive of your computer Double click the APC icon Switch off the Sensistor ISH2000 Connect the file transfer cable between the Sensistor ISH2000 serial port and a COM port on your computer A 2 ee Select desired language Select desired calibrate method Select the COM port that you connected the cable to oC wo I a Press the OK button in the window 10 Switch on the Sensistor ISH2000 11 Wait until the message The driver is installed is shown 12 Switch off Sensistor ISH2000 and disconnect the file transfer cable 13 The installation is completed Quit the program WUE Note For more information press the Help button in the program If necessary you can customise you driver as described in the Sensistor
13. 0 cece ee eee es 32 5 5 Calibration Sequence Signals 00 0 cece cece tees 33 5 6 Setting up your Application 2 2 0 0 00 cee eens 33 5 7 Calibrating and Approving your System 0 0 0 c eee ee eee 36 Preventive Maltes 39 Ors A ON 39 6 2 Maintenance plad o ooooooooooorrrr ene ene nes 39 6 3 Cleaning Port Filter e e a CEH 40 6 4 Membrane PUMP guita nidos 41 6 5 Replacing Gas Sensor hori dpr e A rr 41 INFICON User s Manual AP29 ECO 1 m 10 11 12 2 Trouble Shooting seietan eee ee ee ene ead Ce aoe os 43 Spare Parts AE E E a Mise o a BL ined A dag Bh DO 45 Electric Diagram a ES ta oe SS hee 47 Pneumatic Diagram ceecee eaei o ea ees Re ee ee 48 Technical Diari o ia Ss bs 49 TT Generale att La ds eR ds e AA qe ate o a Ls 49 11 2 Sniffer Flow Opti0MS ooooooooroooooorr nett e en eee 50 Contact Information our opto 51 INFICON User s Manual AP29 ECO 1 1 giy 1 2 1 3 Introduction General The Sampling Probe AP29 ECO forms together with the Hydrogen Leak Detector Sensistor ISH2000 a complete industrial leak detection unit Sampling probe AP29 ECO is intended for intermittent or continuous sampling of a test point or test chamber It performs quick and accurate accept reject testing Note Sample Probe AP29 ECO can only be controlled by Sensistor ISH2000 Leak Detector with software version 3 00 or higher An upgrade kit can be ordered from your su
14. 5 below For other maintenance or repairs contact the service center Toolkit Below is a list of all tools you need for regular maintenance and most repairs Wrenches 9 12 14 15 and 16 mm Allen keys 2 0 2 5 4 0 and 5 0 mm e Screwdriver Phillips or Pozidrive 1 and a small regular screw driver e Soldering pen Maintenance plan The inspection intervals given below are for a typical application There are however large deviations between the actual best intervals depending on the specific application You will have to make up your own maintenance schedule based upon your own experience Details of each maintenance point are described under the respective headline below Refer to Table 8 for the maintenance plan EN Item Interval Inspection Port filters 1 6 months Check and clean filters Gas sensor 3 months Check sensitivity and response time Table 8 Maintenance Plan Inspection interval for the port filters depends greatly on the quality of your supply and external filters If proper external filters are installed you should in principle not need to clean the port filters An external filter in the sample hose will however add volume and thereby time to the sampling step Therefore the choice of an external sample filter is a balance between short cycle times and low maintenance If you know that your environment is dirty or dusty we re
15. 6 C3 pin 6 Error signal optional DET_ERROR 14 C3 pin 4 Detector warming up optional DET_WAIT 18 C3 pin 7 Gas signal above zero optional DET_SIGNAL 17 C3 pin 8 GND 1 12 C3 pin 1 3 Table 3 Functions operated manually 22 INFICON User s Manual AP29 ECO 4 6 3 Programmable Logic Controller etc The AP29 ECO is designed to be controlled by any standard PLC using 24 VDC logic The detectors have 24 VDC transistor outputs capable of delivering 0 5 A each max 2 5 A The detector is certified to fulfill all the EMC EMI requirements of the European Union No further noise cancelling should be necessary See further specifications in the user manual and technical manual of the Sensistor ISH2000 If you have acquired a panel mounted detector H2000P then you connect the signal wires from the green screw terminals on the detector directly to your PLC If you have a table top model Sensistor ISH2000 then you must use a hub and a D type connector to screw terminal converter These items can be ordered from your supplier see spare parts list Table 4 below shows the signals which are recommended to be routed to the controller Name Descriptio Type Table top Panel pin nr mount pin nr DET_ON HIGH when detector power is on OUT 16 C3 pin 6 LEAK OUT REJECT Test result signal OUT 15 C3 pin 5 OUT_ 6 ACCEPT Test result signal OUT 10 C3 pin 10 DET_ERROR Summing error from detector or
16. ICON User s Manual AP29 ECO 19 m 20 A 20 liter cylinder with 150 200 bar 5 gallon 2500 psi will normally last for 1 2 years if calibrating once daily Pressure of reference gas should be 0 03 0 10 MPa 0 3 1 0 barg 4 5 15 psig To connect the reference gas do the following steps Secure gas cylinder safely Open the cylinder valve briefly to blow out dirt that may have collected in the outlet Install gas regulator on cylinder Back regulator to zero output pressure Open the cylinder valve briefly to pressure gauge Close the cylinder valve immediately Turn regulator to higher pressure and let the gas flow out in the air od dc a a Repeat cleaning procedure 5 and 6 two times to make sure that contaminated gas can not reach the gas cylinder 8 Connect a 6 4 mm hose between the reference gas port and the pressure regulator 9 Open cylinder valve and set regulator to 0 03 0 10 MPa 0 3 1 0 barg 4 5 15 psig 10 Open regulator outlet valve if any Note If preferred you can calibrate against a calibrated reference leak This can be a good way of checking your total system performance You can for example install a reference in a leak master Note that not all reference leaks are suitable for leak masters Contact your supplier for additional information Pressure regulator A simple single stage regulator has a pronounced input pressure dependence The output press
17. ade should be 40 um or finer This will greatly reduce the maintenance of your sample probe Caution The reference air must always be the same as the fresh air supplied over your test area We recommend that you take the reference air and fresh air from the outer wall of your building Caution Make sure that reference and fresh air intake is not affected by tracer gas exhaust or exhaust from nearby combustion engines Install the reference air intake in the air duct carrying fresh air from the outer wall to the test area Try to keep the hose relatively short lt 2 m This will minimise the time needed to restart the system if you should happen to get hydrogen in your fresh air intake Exhaust Connect the exhaust to the tracer gas exhaust duct See further under Tracer gas exhaust below Master Controls The Sensistor ISH2000 Leak Detector and AP29 ECO Sample Probe will automatically perform a complete sampling and analysing cycle The test must be initiated from a master control The result from the test must be received by a master deciding what should happen to the test object when the detector has judged it good or bad The simplest way to build a complete test system is to connect the AP29 ECO to an INFICON tracer gas controller ILS500 as shown in the Chapter 2 of this manual The AP29 ECO can also be controlled by manual switches or by a supervising computer such as a INFICON User s Manual AP29 ECO 21 m
18. as follows Look up the alarm level in the Sensistor ISH2000 Note the current setting and reduce the alarm to half the current setting Calibrate the detector ge E sor is OK and you do not need to replace it If calibration succeeds without showing Sensitivity too low for alarm level your sen 5 Ifdetector shows Sensitivity too low for alarm level prepare for sensor change Order a spare sensor You will need to replace the sensor within a few months 6 Reset the alarm level to original setting 7 Recalibrate sensor Change sensor as follows Switch off the Sensistor ISH2000 Disconnect the sensor cable from the sensor Use a 16 mm wrench to remove the sensor Check that the sensor o ring comes out with the sensor E ise Check that o ring is in place over neck of new sensor INFICON User s Manual AP29 ECO 41 m m Wy 42 6 Install new sensor Note The threads are rather short It is important that you hold the sensor straight when screwing it into place USE FINGERS ONLY UNTIL THE SENSOR IS PROPERLY IN PLACE Note If you have problems to mate the threads try to rotate sensor counter clockwise while pressing it gently against the threads of the port Rotate until you feel the sensor pop in place Now rotate clockwise until sensor sits in place 7 Tighten the sensor with the wrench 8 Connect sensor cable Make sure it has locked by pulling gently on the cabl
19. ble test system Installation Warning Always switch power off before disconnecting or connecting any cable Failure to comply with this rule can result in personal injury or serious damage to the equipment Caution The 25 pin D type connector on the back of the instrument is not a computer or printer port Connecting a printer or any other computer device may cause permanent damage to the connected device Install and secure the BUS cable and sensor cable e Connect Master Control signal to manual switches or to supervising computer See Active Probe Control Signals Master Control and Electric diagram below Install pneumatic hoses according to the Table 2 under Installation Pneumatic Connections below e Switch on the Sensistor ISH2000 Open the APC Settings menu and select AP29 ECO If AP29 ECO is missing you must install the driver as described under Software driver INFICON User s Manual AP29 ECO 11 3 2 Controlling the Probe The simplest way to control the AP29 ECO is to connect it to a ILS500 or ILS500 F filler version Simply set the ILS500 in APC mode and press START See ILS500 manual Controlling the AP29 ECO by PLC or manual switches e To start a test sequence set MEAS REQ IN_0 high for gt 40 ms pulse trig e To start a calibration sequence set CAL_REQ IN_1 high for gt 40 ms Refer to Table 1 under Installation Active Probe Control Signals for m
20. c s for direct sniffing with standard sniffer flow Sniffer flow alarm Set to 75 of nominal flow Reference gas Most commonly 10 ppm H2 in air Hydrogen concentration should be within 1 to 400 ppm and within 50 of alarm level e Pressure 0 03 0 1 MPa 0 3 1 barg 4 3 15 psig e Consumption Typically 15 std cc s at 0 05 MPa 0 5 barg 7 psig Temperature range 10 50 C 50 122 F Protection rating IP54 if mounted with ventilation grid facing downwards Dimensions 90 x 161 x 260 mm Weight 4 5 kg Electrical ratings Pumps 24 VDC 10 typical 130 mA e Solenoid valves 24 VDC 10 0 35 W each Electromagnetic Compatibility 1504414 1998 JIS B 8370 INFICON User s Manual AP29 ECO 49 m m 11 2 1 11 2 2 50 Sniffer Flow Options Standard flow 3 atm cc s with std 0 16 mm orifice Optional flow 1 1 atm cc s with 0 10 mm orifice INFICON User s Manual AP29 ECO INFICON INFICON AB Box 76 SE 581 02 Link ping Sweden Phone 46 0 13 35 59 00 Fax 46 0 13 35 59 01 www inficon com E mail reach sweden inficon com
21. commend that an external filter be fitted to the sample hose Chose a filter grade of 10 40 um in a filter cartridge with small internal volume Excess filter volumes can add many seconds and even minutes to the sampling time INFICON User s Manual AP29 ECO 39 m 6 3 Wy The gas sensor check in the maintenance plan can not replace the regular sensor calibration Sensor calibration should be carried out typically every day as part of the total test system self check Cleaning Port Filters There are three port filters These are sintered bronze disks with 10um pore size The filters are fitted behind the inlet connectors of the following ports Sample Reference Air and Reference Gas See Figure 12 These filters will not be dirty if proper external filters are installed External filtration of sample hose is however a balance between increased cycle time and reduced maintenance Note Reference gas and reference air filters should not become dirty If so install proper external filter Recommended filter grade is 40m or finer We also recommend external filter in sample hose This however will give longer cycle times Figure 12 Cleaning port filters 1 Connector 2 Filter disc 3 O ring 4 Orifice disc 5 O ring 40 Table 9 Key to Figure 12 Refer to Figure 12 and clean filter as follows 1 Switch off system power 2 Shut off all gas and air supplies 3 Remove
22. ds Sampling During B seconds Analysis During A seconds No y Set REJECT gt Purge level E output Set REJECT Purge sensor output Purge sensor Purge sampling valve During C seconds Purge sampling valve Purge calibration valve To Standby Set ACCEPT output Purge sensor During C seconds Figure 9 Measure sequence flow chart INFICON User s Manual AP29 ECO 29 EN m 5 2 Measure Sequence Signals Measure sequence signals are shown in the Table 5 See under Installation for pin numbers Signal name Description MEAS REQ Give pulse high gt 40 ms to initiate calibration ACCEPT High after completed test cycle showing no leak Goes low again after 10s or at start of next sequence REJECT High after completed test cycle showing leak High if test cycle is terminated by error or purge request Goes low again after 10s or at start of next sequence PURGE_ REQ Give pulse high gt 40 ms to initiate forced purging the sample hose with air outwards Hold high for continuous purging A purge request terminates a test sequence Table 5 Measure sequence signals 30 INFICON User s Manual AP29 ECO 5 3 Reference Gas Calibration Sequence Flow Chart The reference gas calibration sequence is shown in the Figure 10 Within tolerance Calibration performed Calibration rejected Set REJECT output To Standby Figur
23. e 9 Switch on detector again 10 Calibrate the new sensor INFICON User s Manual AP29 ECO 7 Trouble Shooting See the Table 10 below for trouble shooting Symptom Message Cause Remedy Probe Error on Sensistor ISH2000 dis play Sample inlet filter is clogged Clean or replace filter Sample pump is clogged or damaged Clean or replace pump Valves Y01 Y02 Y 03 Y05 are blocked Clean or replace blocked valve Sample hose has collapsed Check and or replace hose No gas at calibration Calibrate gas pressure too low Check that pressure is 0 03 0 10 MPa 0 3 1 0 barg 4 5 15 psig Calibrate filter is clogged Clean or replace filter Valves Y04 Y05 are blocked Clean or replace blocked valve Low analysing or sampling flow but no alarm Clogged flow orifice Replace orifice and readjust flow alarm Wrongly adjusted or defect flow alarm switch Adjust or replace flow alarm switch Sensor or cable error on Sensistor ISH2000 dis play Sensor cable is not connected Connect cable properly Sensor cable is broken Replace cable Sensor is broken Replace probe First sample after big signal Inadequate purging Increase After test purge time Timer is always LEAK C Purge pump is defect Check pump membrane Every test shows LEAK Increased background c
24. e 10 Reference gas calibration sequence flow chart INFICON User s Manual AP29 ECO EN EN 5 4 32 Sample Calibration Sequence Flow Chart The sample calibration sequence is shown in the Figure 11 Calibration performed Yes Accumulation During D seconds Sampling During B seconds Expose sensor to sampled gas During B seconds Calibrate sensor Within tolerance Calibration rejected Set REJECT output To Standby Figure 11 Sample calibration sequence flow chart INFICON User s Manual AP29 ECO 5 5 Calibration Sequence Signals Calibration sequence signals are shown in the Table 6 See under Installation for pin numbers Signal name Description CAL REQ Give pulse high gt 40 ms to initiate calibration LEAK OUT REJECT High on calibration failure Goes low again at start of next sequence Table 6 Calibration sequence signals 5 6 Setting up your Application This section will list the more important of the software parameters of the Sensistor ISH2000 system It is our intention that this section will guide you when adjusting the test parameters to suit your specific application Note that every application is unique and that you need a deeper understanding of the behavior of the tracer gas mix to get the most of your leak detection equipment We strongly recommend that you study The Hydrogen Method
25. eaks smaller than the limit See further under Analysing time and Purge level below 5 Leak Alarm Level The Leak Alarm Level is the reject level e Gas signals above the Leak Alarm Level result in REJECT e Gas signals below the Leak Alarm Level result in ACCEPT e Set the Leak Alarm Level equal to the defined leak limit of your test object INFICON User s Manual AP29 ECO 6 Purge Level EN A test will immediately be terminated and purging air outward the hose starts if the sensor detects a gas signal above the Purge Level This feature is used to decrease the recovery times after a large leak has been detected For shortest possible cycle time set Purge Level Leak Alarm Level Note Leaks that are larger than the Purge Level will not be correctly recorded Every leak above the purge level however will result in REJECT Purge Level can not be set lower than the Leak Alarm Level 7 Analysing time This is Timer A under the APC Settings menu The sample is passed over the sensor during the Analysing time This time should be long enough to allow the sensor to reach full signal If you use several different Leak Alarm Levels for different objects you should find a specific Analysing time for each Leak Alarm Level If optimised cycle time is not critical you can instead use one time that fits the lowest of the Leak Alarm Levels Find the best analysing time for ACCEPT REJECT testing as follows a Set Leak A
26. evacuated down to just a few mbar to avoid an air cushion at the far end If the tube is open in the far end it is often better to connect an extra volume to that end into which remaining air can escape when the gas pressure is applied If any opening in the test object is difficult to plug you can use a so called ventilated plug This has built in local ventilation pulling any spillage of gas out This makes it possible to test an object for leaks and eliminating the effect of bad connections Tracer gas testing proves an object to be leak free if no gas is found Therefore it is essential that the filling of tracer gas is carried out correctly and that all relevant parameters are properly controlled and supervised We strongly recommend the use of one of INFICON s tracer gas controllers Pressure regulator Warning Pure Hydrogen is a flammable gas Use only ready made mixtures of 5 Hydrogen in Nitrogen This is a standard industrial gas mixture used in various industrial applications A simple single stage regulator has a pronounced input pressure dependence The output pressure can increase double the set pressure or more as the bottle pressure decreases The best way of avoiding this kind of problem is to buy a good two stage regulator They do not exhibit such pressure dependence Tracer gas exhaust Tracer gas exhaust should be transported directly out of the building The exhaust should be placed on the roof of the b
27. hose from connector 1 INFICON User s Manual AP29 ECO 6 4 6 5 4 Remove connector 1 from valve manifold 5 Take out filter disk 2 and o ring 3 6 For reference gas port Take out the orifice disk 4 and second o ring 5 7 Inspect filter disk 2 and orifice disc 4 If necessary clean filter disk 2 and orifice disc 4 with air jet or in solvent Dry the parts thouroughly 8 Place o ring 2 flat on the bottom of filter compartment 9 For reference gas port Place the orifice disk 4 and then second o ring 5 on top of first o ring O rings 2 and 5 are same type 10 Place filter disk 2 flat on top of o ring 2 11 Install and tighten connector 1 Filter is now fixed in position 12 Reinstall hose Membrane Pump The membrane pumps are used for sampling analysing and for sensor and sample hose purging Inadequate filtering of reference air supply may lead to decreased flow capacity as pump check valves become dirty Replacing Gas Sensor The status of the sensor is automatically checked at every calibration The detector will indicate when the sensor needs to be replaced Replace the sensor when this message is shown at calibration Sensitivity too low for alarm level This means that a leak equal to the set alarm level may not be detected This is because the sensitivity of the sensor has become too low for your application Check the current status of the sensor
28. larm Level equal to your reject limit b Set Analysing time Timer A to 10 seconds default value c Set up your leak tester with a leak master or reference This should generate the same concentration of hydrogen as would a real leaking object with a leak equal to the alarm limit d Run a test and note the reading on the detector e Decrease the Analysing time with 1 seconds f Wait 30 seconds g Repeat steps c through e until signal drops considerably h Increase Analysing time with seconds 8 Sampling time This is Timer B under the APC Settings menu This is the time needed to draw a sample from the test point into the AP29 ECO If sampling time is too short the sample will not reach the sensor An excessively long sample time may pump away the sample in a small open chamber The setting of the Sampling time depends on sample hose length and diameter Find the correct sample time as follows a Set Analysing time Timer A to 0 seconds b Set Sampling time Timer B to 10 seconds INFICON User s Manual AP29 ECO 35 EN 5 7 36 c Set up your leak tester with a leak master or reference This should generate the same concentration of hydrogen as would a real leaking object with a leak equal to the alarm limit d Run a test and note the reading on the detector e If you get a signal decrease the Sampling time with 1 second if no signal double the Sampling time f Wait 30 seconds g Repeat step
29. neral hydrogen concentration low in the ambient test area Even a perfectly designed fresh air curtain will leak when the operator moves in and out of the curtain The most common hydrogen sources are Tracer gas exhaust This is always the most important hydrogen source The reason for tracer gas interference from exhaust is poor installation Most commonly too narrow exhaust hose duct Leaking connectors Leaking connectors are the most common interference A gas connector can be designed with double seal and ventilation in between This very safe method is not possible with the pressure decay method e Combustion engines Vehicles inside and outside of your building can produce large amounts of hydrogen It is common that such exhaust gases are carried into the general ventilation system Do not take fresh air from ventilation system Lead battery charging stations Charging of lead acid batteries develops hydrogen Locate any charging station and evaluate the risk for interference Aluminium machining A freshly cut aluminium surface will oxidise quickly The oxidising process involves splitting water into oxygen and hydrogen The hydrogen thus formed is released as hydrogen gas The machining of aluminium creates large areas of fresh metal that will oxidise e Compressed air system It is quite common that the shop air contains hydrogen This sometimes comes from a nearby lead battery charging station but can also stem f
30. oncentra Check for leaks in tracer gas supply tion of hydrogen Check that exhaust of filling equipment is properly installed Check that workplace ventilation works properly Table 10 Trouble shooting INFICON User s Manual AP29 ECO 43 m EN 44 INFICON User s Manual AP29 ECO m 8 Spare Parts Description INFICON order Alternative Order number supplier number Gas sensor 590 250 Sensor cable 590 160 Bus cable 591 420 Hub 590 545 Port filter disk 10m 591 173 Port filter o ring 5 1 x 1 6 mm 591 177 Reference gas port orifice disk 598 041 Table 11 Spare parts list INFICON User s Manual AP29 ECO 45 EN 46 INFICON User s Manual AP29 ECO Electric Diagram EN 9 1908d AAILIV OD567dV S04 vOA Te lo lo N N YOLDINNOD JN S A Nid SZ 15 Le E Ta E Ta IE x lo I5 ace NEP A IA O rn AR ERA E o TI is as 0 oe NEP ne EPT EE O A da Si Ni a a 9 a in a lt a TA Tt XG 5 S e a jc aN O O O CAL_CONF 47 INFICON User s Manual AP29 ECO Pneumatic Diagram 10 EN ysneyxg LUNNIEA on wo gt Lu Fresh air INFICON User s Manual AP29 ECO 48 11 11 1 1 11 1 2 11 1 3 11 1 4 11 1 5 11 1 6 11 1 7 11 1 8 11 1 9 Technical Data General Sensitivity e Concentration Same as detector Using 5 H2 tracer gas 0 5 ppm or 3x10 5 atm c
31. ore information 12 INFICON User s Manual AP29 ECO 4 1 Installation Installation of the AP29 ECO is very simple follow the instructions below The APC system of the Sensistor ISH2000 handles all vital functions All you need to do is to provide Measure Request and Calibration Request Signals Accept or Reject signal will be sent upon completion of each test cycle See Chapter 9 for electric diagram and Chapter 10 for pneumatic diagram Warning Make sure that all electric and pneumatic supplies are switched off when connecting or disconnecting any supplies to the probe or detector Failure to comply with this rule can result in personal injury or serious damage to the equipment Caution The 25 pin D type connector on the back of the instrument is not a computer or printer port Connecting a printer or any other computer device will cause permanent damage to the connected device Placement of Sample Probe Place the sample probe as close as possible to the test object This is done to minimize the length of the sampling hose and thereby the length of the test cycles The probe can be installed in any position We recommend that the AP29 ECO is placed with the ventilation grid facing down This makes it harder for dirt or dust to collect inside the box 240 mm 9 44 ee se rer em ee ee ee ee ee ee ee Figure 4 Placement of Sample Probe INFICON User s Manual AP29 ECO 13 EN m 4 2
32. p Analysis Timer A in APC Settings menu The sample is passed over the sensor during the Analysis time The Analysis timer can be set to 3 seconds if your alarm level corresponds to 10 ppm or higher For lower levels and fine tuning see under Sampling parameters below Purging Timer C in APC Settings menu You can set the AP29 ECO to purge the sample hose direction the AP29 ECO after each completed test The purge time is set by timer C Timer C can normally be set to 0 seconds Other important software parameters Leak Alarm Level General Settings menu Gas signals above the Leak Alarm Level result in REJECT Gas signals below the Leak Alarm Level result in ACCEPT e Calibration coefficient General Settings menu If you calibrate against a reference gas you should set C equal to the concentration of Hydrogen in your reference gas Example for 10 ppm Hydrogen set C 10 ppm For further details refer to the Sensistor ISH2000 manual For optimization of test parameters see under Setting up your application below INFICON User s Manual AP29 ECO 9 EN 10 INFICON User s Manual AP29 ECO 3 1 Quick Start EN This quick start guide can be used to quickly set up your system for evaluation and laboratory testing Note Read this manual carefully before you finalize the design of your test system You must understand all aspects of the detector and probe before you can realize a fully relia
33. pin D type cable with complete pin to pin configuration Several different cable lengths are available Connect the cable and tighten the locking screws on both ends The APC Bus is a simple discrete I O bus Each digital input and output has its own pin wire on the bus See Table 1 below for description of which pins are used for controlling the AP29 ECO Further details of the APC System can be found below and in the Sensistor ISH2000 Technical Manual TM Sensistor ISH2000 Active Probe Control Signals Warning The 24V pin in the bus is intended for the supply of power to switches etc Do not connect this pin to another power supply If you connect this pin to another power supply it can cause serious damage to the detector Warning Make sure that the inductive loads connected to the flow alarm switch have arc suppression circuits INFICON User s Manual AP29 ECO 15 m m See Table for the active probe control signals Signal name Specific function Signal BUS pin H2000P pin type AP29 ECO to Sensistor ISH2000 signals IN 2 Sensor flow alarm IN 6 C2 pin 8 IN 4 By pass flow alarm IN 8 C2 pin 10 24 VDC Flow alarm supply OUT 25 C2 pin 1 OUT_0 Purging pump positive terminal OUT 19 C4 pin 5 GND Purging pump negative terminal GND 12 C3 pin 3 OUT_1 Solenoid valve Y01 positive terminal OUT 20 C4 pin 6 GND Solenoid valve
34. pplier Typical applications for the AP29 ECO are Integral testing in accumulating test chamber e Point testing of pipe joints For example refrigeration and automotive pipes e Automatic surface or weld seam scanning Equipment The equipment which is delivered is e Sampling Probe AP29 ECO Disk with driver software File Transfer Cable female to female RS232 e Bus Cable male to male pin to pin 25 pin D type BUS Adapter Cable 0 5m 3 green Phoenix connectors in one end 25 pin D type other end Sensor Cable 3m black with 5 pin LEMO connectors e User s Manual Other lengths available Safety Aspects Warning Make sure there is proper ventilation The recommended tracer gas mixture contains no oxygen Releasing large amounts of gas in confined spaces may displace the air and create a risk for asphyxiation INFICON User s Manual AP29 ECO 3 m yy Warning Pure Hydrogen is a flammable gas Use only ready made mixtures of 5 Hydrogen in Nitrogen This is a standard industrial gas mixture used in various industrial applications Whenever the word Hydrogen is used throughout this manual it implies that hydrogen gas is safely mixed with Nitrogen in proportions 5 Hy 95 N Warning The normal risks with all compressed gases must also be considered Warning Before connecting tracer gas confirm that your connectors or test fixture is designed for working at the specified test pressure
35. probe OUT 14 C3 pin 4 DET_WAIT HIGH while detector warms up OUT 18 C3 pin 7 DET_SIGNAL LOW when sensor recovered to zero OUT 17 C3 pin 8 IN_0 Measure request IN 4 C2 pin 6 IN_1 Calibration request IN 5 C2 pin 7 IN 3 Forced purge request IN 7 C2 pin 9 Table 4 Signals routed to the controller See under Operation for further details on the signal logics 4 7 Test area This chapter gives some basic advice on how to design and set up your test area For further information refer to application note The Hydrogen Method 4 7 1 Tracer gas supply The tracer gas 5 Hydrogen 95 Nitrogen is best ordered from your regular gas supplier It costs typically 5 USD per 1000 litre It is much cheaper in bulk delivery or if delivered from a Liquid Nitrogen tank with hydrogen mixer INFICON User s Manual AP29 ECO 23 m m lity 24 Note No gas no leak is only true if object is properly filled with gas Install alarm on tracer gas fill pressure Do not order the mix from a special or medical gas supplier and do not order the gas with a certificate of analysis This will make the gas up to ten times more expensive To ensure that the tracer gas reaches all parts of the test object it is important to evacuate before filling with tracer gas This is normally done to 50 80 vacuum Evacuation is especially important when testing a narrow tube which can be suspected to leak at the far end Such an object may have to be
36. rom corrosion in air system INFICON User s Manual AP29 ECO 25 EN 26 Cigarette smoke Incomplete combustion of organic materials results in the production of hydrogen Design tips for fresh air curtain Place fresh air intake on outer wall of building Place air intake far away from cargo bays and tracer gas exhaust Try to create a laminar flow over the test area Make sure that the curtain covers the entire test area test hood or sample point and extends at least 0 5 meters outside the area Make sure that air speed in curtain is rather low typically 0 1 m s You can set up additional small fan s within the curtain for directional purging of test chamber etc The Figures 7 and 8 below show the design of exhaust and fresh air supplies and the principle of air curtain design Large distance E Ss lt YN o pu E Test building Test area No cargo bay on this side Figure 7 Design of exhaust and fresh air supplies INFICON User s Manual AP29 ECO Test object or test Filter reduces turbulence and chamber distributes air over wider area Local air jet E g for purging test chamber between tests Figure 8 Principle of air curtain design INFICON User s Manual AP29 ECO 27 EN EN 28 INFICON User s Manual AP29 ECO 5 1 Operation Measure Sequence Flow Chart The measure sequence is shown in the Figure 9 below Accumulation During D secon
37. s c through e to find the shortest time that gives a reading on the display h Decrease Sampling time with 1 second 9 After test purging time This is Timer C under the APC Settings menu You can set the AP29 ECO to purge the sample hose with air inwards after each completed test Timer C sets the purge time Set timer C initially to 0 seconds The best setting of the After Test Purging time can only be found by experience If you experience that you sometimes get false rejects after large leaks you should increase the After Test Purging time The actual setting is a compromise between lowest possible cycle time and the inconvenience of experiencing some false rejects 10 Accumulating time This is Timer D under the APC Settings menu This is the delay time from that the test object is filled with tracer gas until a sample is taken from the test point Accumulation is mainly used to improve the sensitivity of a test chamber The concentration in the test chamber will increase linearly during the accumulation time We recommend that you try to achieve an alarm limit of 5 ppm or more Lower alarm limits can be used but you must pay more attention to the general design of you test system Calibrating and Approving your System Before commissioning your test system to production you must test and assess that it will measure a leak correctly This means that the whole sequence of events must function in a co ordinated manner
38. tice be modified without prior no All information can a 1110 Publication INFICON AB ninb69e1 AP29 ECO Sampling Probe User s Manual 6 INFICON JE Contents Introduction a is coa eee Ma 3 A A EN 3 12 Equipment A Sie ea ek Pe eB geet eats We aces 3 1 3 Safety Aspects in pick EE EE Ve a 3 System Description tt as 5 2 1 ILS500 based test system 6 renne 5 2 2 System based on table top Sensistor ISH2000 Detector 7 23 Test SEquence se ae css StS deta es oe ee Sistas acta de ede Sa 8 Quick Starter ar A RN o A elaine 11 31 A series 24 in thes by ee Le PL eae Se ca TE a 11 3 2 Controlling the Probe o oooooooooorrrrrrrr 12 Installation AAA eee ed 13 4 1 Placement of Sample Probe 0o ooooooocorrrrrrr eens 13 425 s CableConnections A Ae 14 4 3 Active Probe Control SignalS oooooooooooorrrrrrrrrr 15 4 4 gt Software Driver sin sis ayn ey Va Sees EY Oe SONA eee ee 17 4 5 Pneumatic Connections for AP29 ECO 1 2 kee eee 18 4 6 Master Controls iii eh og ee be eee ed cee neds 21 4 7 Vest A bb RSNA R OE At he ER EOE R ELE LO a AE e 23 Operation softs scp eka AN 29 5 1 Measure Sequence Flow Chart 00 c cece cece eee ees 29 5 2 Measure Sequ nce Signals seoses eee atte oa ee ek Pe 30 5 3 Reference Gas Calibration Sequence Flow Chart o o oooooooooo o 31 5 4 Sample Calibration Sequence Flow Chart 0 0
39. uilding far away from the fresh air intake Electric duct fan and an optional wind extractor is recommended INFICON User s Manual AP29 ECO Diameter of exhaust duct must in all cases be at least 100 mm Using too narrow exhaust can EN result in two major problems e Back flow of tracer gas to test area e Reversal of tracer gas controller evacuation This results in tracer gas leakage inside tracer gas controller and tracer gas will be left in test object after testing 4 7 4 Fresh air For a stable and reliable leak test it is important that the test area and especially the sample point is kept free of hydrogen contamination A small but stable hydrogen background is generally not a problem Quick changes in concentration as well as high background levels however will effect the leak test 1 Caution Do not use compressed air as fresh air supply Industrial compressed air often contains varying and substantial amounts of hydrogen Up to 50 ppm is common For the same reason we recommend the use of fans rather than compressed air for purging of test chambers etc Fortunately the hydrogen mix is very easy to control The gas is light and will readily be blown away by even the smallest air movement The best way of creating a stable environment is to create a fresh air curtain around the test area This is easily done by letting a slow but wide stream of fresh air flow down over the test area It is also wise to keep the ge
40. ume Every cc volume adds 0 4 seconds to cycle time For more information see under Port filters below 18 INFICON User s Manual AP29 ECO Sample Inlet EN The sample inlet is your test point What is pulled in through the end of the sample hose is what will be analysed in the AP29 ECO The Sample Inlet port is in a BSP1 8 to M5 converter The converter holds a filter disk protecting the manifold See further under Port filters below Consider the following when installing the sample hose e Install your AP29 ECO as close as possible to your test point This will minimise the sample hose length and consequently the sampling time e The integrated sample inlet dust filter has limited capacity If you know that your environment is dirty or dusty we recommend that an external filter be fitted to the sample hose Chose a filter grade of 10 40 um in a filter cartridge with small internal volume Excess filter volume can add several seconds to the sampling time The sniffer flow alarm can not detect if the hose is cut off or missing The sample hose must therefore be protected form sharp objects and mechanical wear A plugged or restricted hose however will be detected by the sniffer alarm We strongly recommend that you incorporate a system check that checks the integrity of the sample hose at the start of each shift The simplest way is to run a leak master at every shift start to confirm that all systems
41. ure can increase to twice the set pressure or more as the bottle pressure decreases The best way of avoiding this kind of problem is to buy a good two stage regulator They do not exhibit such pressure dependence Recommended specification Two stage regulator Output pressure range 0 0 10 MPa 0 1 barg 0 15 psig Reference Air The reference air is your signal background The hydrogen content in your samples will be compared with the reference air Variations in the hydrogen concentration in the reference air can therefore result in significant measurement errors Fast increases in hydrogen concentration in the reference air can even result in a temporarily locking of the detector while it adapts to the new higher concentration Hydrogen concentrations higher than the normal 0 5 ppm found in ambient air can also have negative effect on system accuracy The hydrogen concentration in the reference air should always be lower than the lowest concentration that you need to detect Hydrogen content should also be less than 25 of the reference gas concentration used for calibration INFICON User s Manual AP29 ECO 4 6 One of the most important design considerations of your test system is to safeguard the quality of the reference air and the fresh air See further under Fresh Air Caution Install a filter in the reference air hose We recommend the use of a conventional compressed air filter Filter gr
42. with a reference mode This allows for fast and automatic calibration adjustment with a certified gas mixture of Hydrogen in Air Optional software driver can be ordered if calibration with reference leak is preferred See the calibration section below The Sensistor ISH2000 system offers 24 VDC logic signals for valve control leak alarms sniffer flow alarm etc for easy interfacing to any PLC system The AP29 ECO is designed for minimum maintenance and easiest possible service ILS500 based test system INFICON offers a range of products that can be combined for making up most of your entire test system The design work can therefore often be kept to an absolute minimum You will only need to design the test fixture See Figure 1 on how to combine the different parts to form a complete test system INFICON User s Manual AP29 ECO 5 EN Probe Cable C21 Bus Cable BC15 Sampling Probe AP29 Leak Detection System ILS 500 lt Connector pilot air Sampling hose gt Tracer gas gt Test object Gas cylinder Test fixture Gas line gt Figure 1 ILS500 based test system 6 INFICON User s Manual AP29 ECO 2 2 System based on table top Sensistor ISH2000 Detector EN If you have acquired a table top model of the Sensistor ISH2000 you need an extra BUS cable and a HUB See Figure 2 Hydrogen Leak Detector Sensistor ISH2000 Bus Cable I
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