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Hydrogen leak detector Sensistor ISH2000 

 - 

Operating Manual

16

OM-Sensistor ISH2000-EN-201304

EN

5

 Working principle

5.1   Gas Sensor Technology 

The Sensistor ISH2000 leak detector is using an extremely sensitive hydrogen gas 
sensor based on a metal-oxide-semiconductor field-effect-transistor (MOS-FET).

The gas sensitivity appears when hydrogen absorbs into the sensor through a metal 
alloy (metal hydride) layer. 

Only hydrogen can diffuse into the metal and this makes the sensors practically 
insensitive to other substances that do not contain free hydrogen molecules. 

The signals from the sensors are processed by a microprocessor which also controls 
the sensor temperature with high accuracy, and other sensor diagnostics in order to 
ensure perfect functionality. It also automatically compensates for background gas.

5.2   Condition for leak detection

To use the leak detector the test object must be filled and pressurized by tracer gas 
(95% N

2

/ 5% H

2

) to get a gas flow through the leak. The tracer gas is a standard 

welding gas of industry quality, easy to obtain at low cost. The generic name is 
Forming Gas. Appropriate gas filling equipment can be obtained from the leak 
detector supplier.

Be careful of how tracer gases are handled after use. Released tracer gas 
contaminates the surrounding air with hydrogen and can complicate the following 
measurements for a time. Ensure that the tracer gas is ventilated away from the 
target area, preferably to the outside of the building. 

5.3   Leak Detection mode

The detector operates in three modes:
•

Locating Mode is mainly used for detecting and locating leaks but not quantifying 
them.

•

Measuring Mode measures the concentration of hydrogen.

•

Combined Mode, (default mode) which is a combination of Locating and Measuring 
Mode.

The Locating Mode operates continuously while the Measuring Mode determines 
the hydrogen concentration (and calculates a corresponding leak rate) in a step 
measurement. Locating Mode gives no numbers. It therefore needs no actual 
calibration. The sensitivity of the sound signal and the moving bar on the display is 
set manually or automatically, see below.

When using the instrument in Measuring Mode, it must be calibrated as described. 
See “Calibrate the leak detector” on page 19 in order to give correct figures.

Содержание Sensistor ISH2000 HySpeed

Страница 1: ...EN Operating Manual Publication INFICON AB nina60e1 d 1304 All information can be modified without prior notice Hydrogen Leak Detector Sensistor ISH2000 Instrument SW version 6 22 Probe SW version 1 08 ...

Страница 2: ......

Страница 3: ...To Quantify Leaks 18 7 Calibrate the leak detector 19 7 1 Introduction 19 7 2 Calibration Leak or Calibration Gas 19 7 3 Unit Conversion 19 7 4 Calibration procedure 20 7 5 Calibration value with Calibration leak 20 7 6 Calibration value with Calibration gas 21 8 Reference section 22 8 1 Menu system 22 8 2 Button functions 23 8 3 Stored values and setups 23 8 4 Engineering format 23 8 5 Change Tes...

Страница 4: ...Hydrogen leak detector Sensistor ISH2000 Operating Manual 4 OM Sensistor ISH2000 EN 201304 EN 13 Menu Overview 54 14 Declaration of conformity 56 15 Recycling 57 ...

Страница 5: ...nsitivity and selectivity is required in combination with simplicity reliability and low cost This product complies with the requirements of European Directives listed in the Declaration of Conformity found on page 56 in this document These Directives are amended by Directive 93 68 E E C E C Marking Copyright Intellectual property The use of INFICON AB products are subject to copyright and intelle...

Страница 6: ...nsists of in depth explanation and additional information which completes the user manual with all relevant information 1 3 Conventions used in this book In this user manual the following text style hardware command is used for references to hardware commands or button labels while this text style software command is used for references to software commands and menu choices WARNING Warning indicat...

Страница 7: ...emi or fully automatic test system The functions range from output of all necessary status signals and printer communication port to an advanced Active Probe Control system APC This makes the detector capable of controlling advanced sample collecting devices down to simple test fixtures Fig 2 1 The desktop model consists of seven parts Item Description 1 Detector instrument 2 Hand Probe P50 shown ...

Страница 8: ...e battery charge status Sensistor ISH2000C will operate for 14 hours on a fully charged battery with screensaver and mute function And 9 hours without screensaver and mute function One hour charging will give about one hour of operating time This can be done when necessary but it is important to regularly fully charge the battery Fig 2 2 The battery operated model consists of seven parts Item Desc...

Страница 9: ...y other flat surface The instrument operates on an external 24VCD power supply provided by the customer Mounting brackets and a panel rubber seal are delivered with the detector See Sensistor ISH2000P installation on page 45 Fig 2 3 The panel mount model consists of seven parts Item Description 1 Detector instrument 2 Brackets not shown 3 Screws not shown 4 O rings seal not shown 5 User manual not...

Страница 10: ... menus Their positions are indicated on a horizontal scale Change from one menu to another using the and buttons Main menus have sub menus which are also indicated by horizontal scales and can be selected using the and buttons Scales for setting numeric values languages etc Messages Sensistor ISH2000C A battery status indicator in the upper right corner Item Description 1 Display 2 Loudspeaker 3 C...

Страница 11: ...y Sens Calibration Cal and Menu 3 3 LEDs The two LEDs indicate the status of the instrument as follows Green flashing slowly during warming up phase Green fixed light indicates that instrument is ready and hydrogen signal is below Reject Level limit Periodically flashing green or red calls for calibration Alternating red and green light while the instrument establishes probe communication Red fixe...

Страница 12: ...nsistor ISH2000C Fig 3 3 Sensistor ISH2000C ports and connections rear view Item Description 1 Data output 2 Probe control port 3 Fuse 4 Power switch 5 Power input 100 240 VAC 6 Screw hole for mounting plate 1 2 3 4 5 6 1 2 3 4 5 6 Rear View 1 2 3 4 5 6 Item Description 1 Power switch 2 Printer port 3 Power input From Battery charger 4 Screw hole for mounting plate 1 2 3 4 ...

Страница 13: ...rating Manual OM Sensistor ISH2000 EN 201304 13 EN Sensistor ISH2000P Fig 3 4 Sensistor ISH2000P ports and connections rear view Item Description 1 Probe connection 2 Ground screw 3 Power input 24 VDC 4 Probe control port 5 Printer port 1 2 3 4 5 ...

Страница 14: ...is a flammable gas Only use ready made Hydrogen Tracer Gas of 5 Hydrogen in Nitrogen This is a standard industrial gas mixture used in various industrial applications Note Whenever the word Hydrogen is used in this manual it implies that the hydrogen gas is safely mixed with Nitrogen in the proportions 5 H2 95 N2 WARNING Since the tracer gas mix contains no oxygen releasing large amounts of gas in...

Страница 15: ...rogen in nitrogen is released into air there is a region of ratios of air to gas where the mixture is flammable When for example a mixture of 10 hydrogen in nitrogen mixes with air there is still very little energy available Only in exceptional circumstances can a flame be self supporting However such mixtures cannot detonate 4 3 Interferences Most tracer gas methods suffer from some sort of inter...

Страница 16: ...ry quality easy to obtain at low cost The generic name is Forming Gas Appropriate gas filling equipment can be obtained from the leak detector supplier Be careful of how tracer gases are handled after use Released tracer gas contaminates the surrounding air with hydrogen and can complicate the following measurements for a time Ensure that the tracer gas is ventilated away from the target area pref...

Страница 17: ... level then the unit must be calibrated in accordance with the instructions see Calibrate the leak detector on page 19 The reason for this is that the alarm is based on the Measuring Mode when the Locating Mode is displayed 6 2 To Locate Leaks Note The Locating Mode or use the Locating bar in Combined Mode is used to locate leaks This mode is semi quantitative that is it gives an audio and visual ...

Страница 18: ...ng the detector in this mode In Measuring Mode the probe should be moved directly from a background situation to the test point The size of the leak in cc s or any other selected units is shown on the display The probe can and should be removed from the measuring point as the measured value steady and remains on the display The period during which the measured value is displayed can be adjusted in...

Страница 19: ... local gas suppliers A Calibration Leak is a well defined gas leak The Calibration Leak should be fed by the same gas used in the detection test and with a gas pressure defined in the Calibration Leak certificate Calibration Leak can be ordered from the detector provider Choose a calibration leak or calibration gas size as follows Same or higher than the Reject Level but maximum 10 times higher In...

Страница 20: ... If the calibration is not saved the instrument will revert to the previous value after one minute Note You will need to repeat the gas exposure procedures 2 3 times to get Calibration OK after changing setup or probe The text Calibration failed Check leak gas and sensor status or a custom text will appear after 5 attempts Allow at least 30 seconds between each exposure for best accuracy If the me...

Страница 21: ...ion leak should be within the concentration range of 5 ppm 400 ppm H2 7 6 Calibration value with Calibration gas When measuring hydrogen concentration instead of leak flow in most cases you will calibrate the detector to a Calibration gas with a known concentration Set the Calibration Value equal to the Hydrogen concentration in your Calibration gas This can be found on the certificate of analysis...

Страница 22: ...ws all the levels when browsing down through the menus so that you can always see exactly where you are See Menu Overview on page 54 Fig 8 1 Sensistor ISH2000 start screen To enter the menus press Menu button 4 Fig 8 2 Sensistor ISH2000 main menu screen Press and button 2 and button 3 to choose between main menus If no setting is made in a menu or its sub menus within 60 seconds the instrument wil...

Страница 23: ...e Trig Level is stored into the hand probes memory That mean that you easily can change the probe to another one and still keep your setup 8 4 Engineering format Some of the parameters of the detector are written in engineering format This format can represent a very wide range of numbers from very small to very large numbers The following examples describes the format used in the detector 1 00E 0...

Страница 24: ...ed Fig 8 3 Sensor condition indicator The length of the bar shows the condition of the sensor The bar will become shorter if the sensor has lost some in sensitivity The scaling of the indicator is not precise enough to say at exactly what length the sensor must be replaced You will learn when this happens for your particular application The instrument will also tell you in clear text when sensitiv...

Страница 25: ... cc min SCCM g yr oz yr mbarl s mm3 s mm3 min Pa m3 s or Custom When you select Custom you can enter any unit as long as it contains a maximum of 12 characters No gas or unstable signal No gas signal or no stable signal detected during calibration Check if Calibration leak gas valve is shut Check that probe tip is not clogged Signal when Calibration gas is shut off Happens for Calibration gas only...

Страница 26: ...n is a natural part of leak measurement and an important factor in quality assurance It is impossible to specify an exact requirement for the interval between the calibrations because the applications for which the instrument is used can vary considerably There will be some oxidation of the probe sensor which reduces the sensitivity if the probe sensor is not subjected to gas for a lengthy period ...

Страница 27: ...t the probe close to the Calibration leak and note approximately what reaction you get no reaction small medium high full scale within the first few seconds Set the sensitivity This can be done permanently under the menu Locating Mode or temporarily as a Direct Sensitivity Setting on the display unless you have set this function to OFF under menu Sensitivity Settings There is also an Auto ranging ...

Страница 28: ...re a sudden rise in background concentration will be detected However if the concentration remains constant it will be gradually canceled out over a period of several minutes For example if the background concentration for some reason should suddenly rise to 10 ppm H2 then the detector will give a corresponding signal which will very slowly decline to zero If you thereafter expose the probe to a l...

Страница 29: ...oved from the measuring point as the measured value remains on the display The period during which the measured value is displayed can be adjusted in the Measuring Mode Settings menu Reject Level Threshold level for Reject decisions When this level has passed Reject it will be indicated by audio and LED signals Note The frequency of the acoustic signal in Measuring Mode is controlled by Reject Lev...

Страница 30: ...rs the results 3 You might need to wait until the next measurement The instrument signals Wait 4 Repeat the procedure for the next measuring point When all measurements are made the sum of all leaks is shown If the sum of all leaks is greater or the same as the Reject Level then REJECT is shown If the sum of all leaks is under the Reject Level then ACCEPT is shown And if the sum of all leaks is gr...

Страница 31: ...o Ready Pulse This sets the standby sound to a silent or pulsating tone 8 9 APC Settings APC is an abbreviation for Active Probe Control APC is used to control an active probe via the Probe Control Port There are several active probes available Choose correct probe under the menu Probe Type Customized APC drivers can be downloaded from a PC There is a possibility to adapt how to measure by adjusti...

Страница 32: ...to keep a high readability Screen Save Timeout Display lamp will turn off if instrument is left idle for the number of minutes set by this parameter The screen save timeout can be set between 1 and 60 minutes the function is deactivated if set to OFF The display lamp will return to the set brightness if any of the display or probe buttons are pressed if a gas signal is detected or an instrument er...

Страница 33: ...n function is chosen Change Password The user password is a text string max 12 alphanumerical characters used to lock critical parameters Setting password to an empty string no characters means that no password is needed to modify the critical parameters The default is no password Contact INFICON AB if you have lost your user password If the Password Protected Calibration parameter is set to ON yo...

Страница 34: ...ensistor ISH2000 is equipped with a serial RS232 printer port for data output See Printer port on page 39 Not in ILS500 Mode Info Contains information about software versions Serial number and Internet contact information 8 12 Service Settings Service Settings contains important settings that the customer should not change without supervisor guidance To enter Service Settings menu a password is re...

Страница 35: ...ng signals A high setting of Detector Signal Level gives better tolerance to noise gas signals at the expense of accuracy A low setting gives best accuracy but lower tolerance for noise gas signals The Detector Signal Level is set as 1 to 100 of the Reject Level Note Increasing the Detector Signal Level may give poorer accuracy Trigg Level Upper Limit setting for Peak hold in Measuring Mode Min Ca...

Страница 36: ...tip of the probe The probe is equipped with a function button indicator lamps and lighting The probe can be ordered with a flexible neck During operation the heat of the probe tip is 50ºC Note There are a variety of different probes that can be connected to the Sensistor ISH2000 When using an active probe please refer to the respective probe manual Changing the Probe After attaching a probe the Se...

Страница 37: ...sing computer system Note Battery operated model Sensistor ISH2000C does not have a Probe Control Port Pin configuration for the different detector models is described under Model Specific Specifications below See Sensistor ISH2000 specifications on page 50 for electrical specifications See Status signal patterns on page 38 for signal patterns Probe Control Port Connector The control port connecto...

Страница 38: ...s in relation to different events is described by the following two examples Example Input signals issued to control the APC system should have a pulse length of at least 40 ms Example Output signals switch with a cycle time of 100 ms 0 1 s This is the cycle time of the APC system Note Not valid for battery operated version of Sensistor ISH2000 ISH2000C After power on 12 GND 13 GND 14 OUT DET_ERRO...

Страница 39: ...ion The printer port is a standard 9 pin male D sub The connecting cable is a standard 9 pin file transfer cable Null Modem Cable For the pin configuration refer to Table 8 4 Table 8 4 Pin configuration of the printer port Power on Power off Warming up DET_SIGNAL LEAK_OUT DET_WAIT DET_ON DET_ERROR Locating or Measuring Mode No gas detected Gas signal Purge level Detector signal level 0 ppm DET_SIG...

Страница 40: ...sults PC printer with serial interface The PC Printer option can be used to print data on most standard PC printer with serial interface Parallel interface printers can be used if connected through a serial to parallel converter see below Note The output format has been chosen to be as simple as possible to ensure that most printers will accept it Therefore the printer output does not use any flow...

Страница 41: ...ter system such as for example a PLC system Table 8 7 Communication specifications The data format for Measure data output consists of nine ASCII characters ten if three significant digits are used Seven characters or eight if three significant digits are used show the value in engineering format See Engineering format on page 23 One character shows the result of the test and one character shows t...

Страница 42: ...ating Data Output option is intended for automated scanning of weld seams etc Note The Locating Data is expressed in arbitrary units Locating Mode signal is not affected by calibration Table 8 9 Communication specifications The data format for Locating data output contains of nine ASCII characters Eight characters show the value in engineering format See Engineering format on page 23 and one chara...

Страница 43: ...led is returned otherwise N Print Request Returns current Measuring value Q Set APC in stand by stop a measurement Returns a Q X Shift State to Measuring Mode Returns nothing Z Shift State to Locating Mode Returns nothing Y Shift State to Combined Mode Return nothing Table 8 12 The following data setups can be downloaded to Sensistor ISH2000 Stop bits 1 1 1 Parity None None None Flow control None ...

Страница 44: ...ld not be converted in the Sensistor ISH2000 you will receive the string CoEr Conversion Error Calibration Fail text CF Custom Text string max 35 characters To return to the original text just leave the text string empty Reject Level A n nnE nn Correlation Value B n nnE nn Measuring Unit C Custom Text string max 12 characters Measuring Unit CUx x 1 to 11 1 ppm 2 cc s up to 11 Leak Gas LGx x 1 to 1...

Страница 45: ...tor Refer to Figure 8 6 Fig 8 7 Panel cut out dimensions Measurements Panel cut out 262 x 127 mm 5 x 10 3 inches Maximum panel thickness 8 mm 0 3 inch Allow an extra 20 mm 0 8 inch on left and right side for mounting brackets Depth of open space in panel is at least 15 cm 6 inches for Sensistor ISH2000 to fit CAUTION The detector should preferably be mounted on a vertical surface Tilting more than...

Страница 46: ...rove around the edge of the detector 3 Put the detector in place in the panel hole 4 Hold the panel in place while fixing the mounting brackets to the detector See Figure 8 7 5 Align the detector horizontally and lock it by tightening the 4 set screws 6 Lock the set screws with the locking nuts 7 Connect ground terminal to protective ground of cabinet Bracket to panel screw Bracket to unit Bracket...

Страница 47: ... N2 5 H2 ILS500 Mode ON OFF OFF Interval 0 255 Days Hours Minutes Invert Colors ON OFF OFF Language Several choices English Leak Gas Several Choices H2N2 Measure Print Button ON OFF OFF Measuring Unit Several Choices cc s Menu Mode Several Choices Combined Mode Min Calibration Time 0 30 s 5 s Min Presentation Time 120 s 1 s Multipoint Measuring Several Choices OFF Multipoint Measuring Time 0 0 30 ...

Страница 48: ...rge Level 1 00E37 1 00E 37 1 00E 02 Reject Indication Locating ON OFF ON Reject Indication Measuring ON OFF OFF OFF Reject Level 1 00 E 37 1 00E 37 1 00E 01 Screen Save Timeout 1 60 min 20 min Sensitivity 1 15 8 Set Clock hh mm ss Set Date YY MM DD Show Reject Level ON OFF ON Trigg Level 1 00E 37 1 00E 37 0 00E 00 Parameter Range Default ...

Страница 49: ...cating Mode and Measuring Mode Press the button repeatedly No picture on display no sound Check the fuse No picture but only sound when exposed to gas Display setting may be wrong Watch the display from the side at a low angle and aim a lamp at the screen Try to see the text so that you can enter the Display Settings menu and adjust contrast and brightness If this doesn t help send in the instrume...

Страница 50: ...tput Sensistor ISH2000 Sensistor ISH2000C Sensistor ISH2000P Power input connector AC input connector IES 320 Charger input connector 2 1 x 5 5 mm std Positive centre 4 pin Phoenix MC 1 5 5 81 Series Detachable screw terminal Probe control Status port 25 pin D sub female 25 pin D sub female Minimum pulse length 40 ms 40 ms Input impedance 50k ohm 50k ohm Input maximum range 34 to 38 VDC 34 to 38 V...

Страница 51: ...s 275 x 190 x 170 mm 11 x 7 x 7 inches 275 x 140 x 75 mm 11 x 6 x 3 inches Environment temperature 0 50 C 0 50 C 0 50 C Environment humidity 10 90 RH 10 90 RH 10 90 RH Selected unit Sensitivity mbarl s air using 5 H2 95 N2 as Tracer Gas 1 x 10 7 mbarl s g yr R143a using 5 H2 95 N2 as Tracer Gas 0 02 g yr Selected unit Sensitivity Measurement range Linearity Repeatability ppm H2 0 5 ppm 0 5 2000 pp...

Страница 52: ...Length 6m Length 9m Length 4m Helical Length 6m Helical 590 161 590 175 590 165 590 163 590 164 Probe Tip Protection Cap for Hand Probes P50 and P50 FLEX Probe Tip Filter 590 625 Set of 500 591 273 Set of 50 591 234 Set of 50 Power cable eu Power cable uk Power cable us 591 146 591 147 591 853 Fuse 2 A slow for Sensistor ISH2000 591 578 Carrying case for Sensistor ISH2000C 591 329 Battery charger ...

Страница 53: ...r instrument to INFICON Please use the Product Return Form which was included with the product at delivery Do not return any component of your instrument to INFICON without first speaking with a Customer Support Representative You must obtain a Return Material Authorization RMA number from the Customer Support Representative If you deliver a package to INFICON without an RMA number your package wi...

Страница 54: ...libration Time Interval Password Protected Calibration Locating Mode Settings Sensitivity Auto Range Direct Sensitivity Adjustment Audio Threshold Reject Indication Audio Ready Pulse Measuring Mode Settings Reject Level Measuring Unit Displayed Gas Multipoint Measuring Multipoint Measuring Time Min Presentation Time Display Threshold Audio Threshold Reject Indications Show Reject Level Audio Ready...

Страница 55: ...een Save Timeout General Settings Correlation Value Language Measure Print Button Probe Button Probe Lamp Change Password Password Protection Level Audio Base Frequency Set Clock Set Date Data Output Info Service Settings Show Password Instrument System Reset Detector Signal Level Trigg Level Min Calibration Time Calibration Tolerance Battery Mode ILS500 Mode Number of Significant Digits Debug Mod...

Страница 56: ...000 P Panel mounted model ISH 2000 ICE Table top model ISH 2000 C ICE Battery operated model The manufacturer declares the above products to be produced in conformity with the following directives CE Marking Directive 93 68 EEC EMC Electromagnetic Compatibility 2004 108 EC LVD Electrical safety Low Voltage 2006 95 EC WEEE Waste electrical and electronic equipment 2002 96 EC RoHS Restriction of the...

Страница 57: ...materials and may not be disposed of as unsorted municipal waste If you wish you can return this INFICON AB product to the manufacturer for recovery The manufacturer has the right to refuse taking back products that are inadequately packaged and thereby presents safety and or health risks to the staff The manufacturer will not reimburse you for the shipping cost Shipping address INFICON AB Westman...

Страница 58: ...INFICON AB Box 76 SE 581 02 Linköping Sweden Phone 46 0 13 35 59 00 Fax 46 0 13 35 59 01 www inficon com E mail reach sweden inficon com ...

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