MP Filtri ICM Скачать руководство пользователя страница 39

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Installation

•

Connect hoses.

−

There must be no extra restriction placed in the drain hose. Do not have

a pipe going to a restrictor to control flow. Any such restrictor must be

mounted directly to the ICM drain fitting.

−

Fluid flow must be from the bottom fitting to the top, following the direction

of flow arrow on the product labelling i.e. the bottom fitting is the inlet and

the top fitting is the outlet.

•

Fit electrical connector, wire back to a junction box.

This is because any length of pipe between the ICM and a downstream restrictor can act as an accumu-

lator. Any pressure pulsations (for example from a pump) in the feed to the ICM are then translated into

pulsations in flow rate, sometimes leading to flow reversals in time with the pulsations. If the flow is

very low this can sweep the same particle backwards and forwards through the sensing volume multiple

times, confusing the results.

Содержание ICM

Страница 1: ...ICM Inline Contamination Monitor 2 0 User Guide 201 008 EN www mpfiltri co uk ...

Страница 2: ...CM Models except AZ2 ATEX Safety Warning Hydraulic systems contain dangerous fluids at high pressures and tempera tures Installation servicing and adjustment is only to be performed by qual ified personnel Do not tamper with this device ...

Страница 3: ...ront Panel Operation 15 Result Display Diagnostics Display 6 Water Sensor 19 7 Data Logger 20 Data Transfer via USB Stick 8 Remote Display Unit Option 22 9 Optional Computer USB Interface 23 10 Remote Control 24 Computer Connection 11 PC Software Operation 26 12 Settings 28 General Test Number Test Duration Result Display Simulated Test Low Flow Alarm Disabled Clean Systems Continuous Testing Alar...

Страница 4: ... Flashing Fault Codes Test Status Other Faults 17 Cycle Time and Flow Rate Considerations 56 18 Modbus 58 Reading the Result Codes 19 CANbus 59 20 Analog 4 20mA Modes 60 Fixed NAS1638 and RH Time Multiplexed Schemes Time Multiplexed Scheme 2 A Measuring Water in Hydraulic and Lubricating Fluids 63 B ISO4406 1999 Cleanliness Code System 65 C NAS1638 Cleanliness Code System 67 D SAE AS4059 REV E Cle...

Страница 5: ...G New ISO Medium Test Dust and its effect on ISO Contamination Control Standards 74 Calibration New Test Dust Benefits Effect on Industry Correlation Other Standards H Clean working practises 79 ...

Страница 6: ......

Страница 7: ...rface The integrated data logger records up to 4000 test results internally for use where a computer cannot be permanently connected Simple switched inputs and alarm outputs are provided as alternative means of controlling the testing and signalling the results The full colour front panel led provides a basic indication of the cleanliness level The graphical LCD allows direct local display of the ...

Страница 8: ...test results with two pro grammable Alarm relay outputs The full colour front panel LED indicator also reflects the test results indicating if any set limits have been exceeded See section 12 8 The base unit for remotely controlled embedded applications and comes without key pad and LCD W Adds Water and Temperature Sensing 1 See section 6 0 if not required M Mineral Oil Diesel Fluid Compatibility ...

Страница 9: ...l flow that varies outside the upper flow range of the unit 2 1 3 ICM USBi USB interface adaptor for the ICM This is a ready made solution for easily connecting a computer and powering the ICM Figure 2 2 USBi It is a USB RS485 interface with a terminal block pre wired with the ICM cable An extra terminal block is provided for any customer wiring to external devices An external DC adapter can be us...

Страница 10: ... This is available from MP Filtri UK Part SK0040 Reporting Formats ISO 4406 1999 ICM Default NAS1638 AS4059E Table 2 AS4059E Table 1 ISO 11218 Accuracy ISO code for 4 6 14µm c 1 code for 21 25 38 50 70 µm c Calibration Each unit individually calibrated with ISO Medium Test Dust MTD based on ISO 11171 1999 on equipment certified by IFTS Test Time Adjustable 10 3600 seconds factory set to 120s Moist...

Страница 11: ...420 bar static For high frequency pressure pulse applications contact MP Filtri UK Differential Inlet Outlet Pressure Typically 0 5 bar see section 15 1 Seal Material M N Viton Contact MP Filtri UK for any fluids that are incompatible with Viton seals Seal Material S Perflouro elastomer 3 3 Environmental Ambient Temperature 25 to 80 C for non Kversion 25 to 55 C for Kversion IP Rating IP66 3 4 Phy...

Страница 12: ...ply or DC outlet Supply Voltage 9 36V DC Supply Current 12V 24V 36V 150mA 80mA 60mAfor Kversion 70mA 40mA 30mAfor non Kversion Power Consumption 2 2W Switched Inputs Outputs see section 14 4 for details 4 20mA Current Loop Outputs see 14 7 for details 3 6 Warranty and Recalibration Warranty The ICM is guaranteed for 12 months from date of receipt Re calibration The ICM is recommended to be recalib...

Страница 13: ...oth cleanliness and water content upper limits ex ceeded Violet indicates that the upper temperature limit was exceeded 3 2 If all these codes seem confusing please note that a given colour will only ever be seen if the corre sponding limit has been specifically set by the user So for example if a maximum temperature limit has not been set the violet indication will never be seen If all that is wa...

Страница 14: ...14 Status LED The LED can also indicate various fault codes by turning red and flashing white a number of times see section 16 1 ...

Страница 15: ...utomatically matched to the selected format There is also a History screen which shows the last 10 results The operator can switch between these screens using the and keys The horizontal line is the progress bar it grows from left to right as the test pro gresses When it reaches the right hand side a new result is generated 5 2 Diagnostics Display Press to show the diagnostics displays used when d...

Страница 16: ... state of the unit Any errors such as LOW FLOW will also appear here 5 The second screen shows diagnostics relating to Modbus serial communications traffic External Comms Errors are those between a connected PC and the ICM Internal Comms Errors are internal to the unit showing communications between the ICM keyboard display circuit board and the sensor itself The third screen shows diagnostics rel...

Страница 17: ...Front Panel Operation 17 Simple Detailed Figure 5 4 AS4059E Table 2 Simple Detailed Figure 5 5 AS4059E Table 1 Simple Detailed Figure 5 6 ISO11218 Draft ...

Страница 18: ...18 Front Panel Operation Figure 5 7 History Screen General Modbus CAN Bus Figure 5 8 Diagnostic Screens ...

Страница 19: ...ent of the fluid characteristics The water saturation point 100 RH is temperature dependent so the tempera ture is measured at the same time 6 This enables results to be compared meaning fully 6 The temperature measured is that of the fluid passing through the unit Note this may differ from that of the hydraulic system depending on flow rate pipe length and ambient temperature It is not intended t...

Страница 20: ...1 for details of how to download the test log via a cable 7 1 Data Transfer via USB Stick ICM U models allow direct download via a USB memory stick With the ICM powered up plug the USB stick into the USB connector at the top of the unit The screen indicator will turn yellow briefly as it writes out the test record to the USB stick When complete it will turn green and the stick can be removed If th...

Страница 21: ...Data Logger 21 The USB stick provided with the unit is pre formatted for the transfer Other USB sticks may need to be re formatted FAT32 ...

Страница 22: ...ssible The ICM RDU connects in between the incoming supply serial connections and the ICM sensor It is transparent to the serial communications This means that a PLC or LPA View can operate in the usual way to control the ICM change settings or download results without having to unplug the RDU Similar components are used for the RDU as for the normal ICM K option so the same instructions apply for...

Страница 23: ... a terminal block pre wired with the ICM cable An extra terminal block is provided for any customer wiring to external devices An external DC adapter can be used to power the complete system or if the computer is always connected during use power can be taken directly from the USB cable Note Computer should have mains power applied at all times Detailed installation and usage instructions are prov...

Страница 24: ...erates as a stand alone item performing tests on a schedule or under external command from a control system If a permanent record of the results is needed an operator can occasionally connect a computer and use LPA View to download the accumulated test data 10 1 Computer Connection The connection is made using an RS485 adaptor connected to the PC Either a USB RS485 or a RS232 RS485 converter can b...

Страница 25: ...ose the connection on your computer All working communication ports of the computer are available for selection Select the one used to connect the ICM then press OK If you are unsure which port is correct the device name should be next to the COM port number When communication has been established successfully the remote control dialogue will appear After a successful connection the COM port will ...

Страница 26: ... the test number and test time date An example would be a machine number or customer name The Test Reference can be up to 15 characters in length When connected the ICM status should show Ready The operator can then press the Start button to begin the test The progress bar shows how much of the test has been completed The test can be abandoned at any time by pressing the Stop button If the Start b...

Страница 27: ...ger so previous test results can be downloaded into the test database using the Download New and Download All buttons The dif ference between these is that Download New only transfers results that have never been downloaded before Download All transfers all results that are stored in the ICM Erase Log deletes the test results from the memory of the ICM When the user has finished operating the ICM ...

Страница 28: ...ancel to leave the settings as they were Figure 12 1 Remote Device Settings dialogue10 9 The ICM has been designed to be a very flexible product so has a wide range of settings and operat ing modes However the shipped defaults are suitable for most applications and many users can skip this section Actual operation is straightforward even when advanced settings are used during initial configuration...

Страница 29: ...the timestamp date and time of test and test reference is preferred 12 3 Test Duration The length of the test is controlled by the Test Duration The factory set value of 2 minutes is suitable for most applications but the user is free to set a different value Shorter times will make the ICM more responsive to short term fluctuations in contamination level It will also result in less consistent res...

Страница 30: ...through the flow cell This will not effect the contamination measurement but it is worth noting that a lower confidence or no indication at all on a clean system If this is the case the tick box is available to allow a contamination reading Note Should the flow alarms be disabled at any point it is imperative that the ICM is installed in such away that if the system is shutdown zero flow the ICM i...

Страница 31: ...esult in 2 minute long tests repeated every 10 minutes with a test logged hourly Start Testing Automatically sets the ICM to begin a test soon after it is powered up This is ideal for unattended systems Stop Testing When Clean is a feature intended for cleaning rigs or filter trolley type applications The ICM continues testing until the fluid is clean at which point an alarm is signalled and testi...

Страница 32: ... can be set for the cleanliness level also for water content and temperature if applicable An alarm if enabled will become active if any of the associated upper lower limits are exceeded However if a field is left empty blank this is interpreted as a don t care setting In the example Figure 12 2 the Upper Alarm is exceeded if the 4µm count is greater than ISO code 23 or the 6µm greater than ISO co...

Страница 33: ...r each defined particle size band Hence we have the option of setting a limit on this overall contamination class the Basic Class or we can set individual limits on any combination of the classes for the defined particle size ranges AS4059E Table 2 Alarm Levels AS4059E Table 2 uses letters instead of numbers to indicate the particle size range so the settings are labelled appropriately The standar...

Страница 34: ...he conditions under which the outputs are turned on are also displayed above the Alarm Mode selector for each setting 12 Note that these outputs are distinct from the front panel LED and that the set alarm mode does not affect the LED The set alarm mode determines the function of the two switched outputs only This setting and this entire section can be ignored if these outputs are unused i e the u...

Страница 35: ... less than or equal to the lower Clean limit This could be used to stop a cleaning pump Output 2 is the Dirty output coming on when the result is greater than the upper Dirty limit This could be used to start the cleaning pump Alarm Mode 2 Green Amber Red Output 1 Output 2 Turns on When Upper Lower Intended Function Green Red This mode encodes the result in such a way that the internal alarm relay...

Страница 36: ...ended Function Continue Testing Cleanup complete This is used for a cleaning application where a signal is needed to run a pump Continue Testing and optionally operate an indicator Cleaning Complete Continuous testing and Stop Testing When Clean must both be selected for this mode to operate Output 1 then operates immediately so it can be used to switch on a pump Testing continues until a clean re...

Страница 37: ...he not clean signal Continuous testing should not be selected for this mode Alarm Mode 6 Testing not Clean Output 1 Output 2 Turns on When Testing Lower Intended Function Test in progress signal not clean Signal This is similar to mode 5 above The difference is that output 1 is active during the test and turns off at test end Continuous testing should not be selected for this mode Alarm Mode 7 Cus...

Страница 38: ...olt to desired location using fixing holes pro vided The ICM must be in a vertical orientation with the oil flowing upwards through it Wire back to junction box Check flow in acceptable range There needs to be a differential pressure placed across the ICM such that a flow of fluid is generated within the range of the unit If there is no suitable differential pressure available then a flow controll...

Страница 39: ...ttom fitting is the inlet and the top fitting is the outlet Fit electrical connector wire back to a junction box 15 This is because any length of pipe between the ICM and a downstream restrictor can act as an accumu lator Any pressure pulsations for example from a pump in the feed to the ICM are then translated into pulsations in flow rate sometimes leading to flow reversals in time with the pulsa...

Страница 40: ...ink START INPUT 3 green RS485 CANL 4 20mA B RS485 4 white OUTPUT 1 5 grey I O COMMON 6 brown OUTPUT 2 7 blue DC 0V DC 0V 8 red DC POWER DC POWER 14 1 1 Remote Connector The remote connector is intended for temporary connection of a USBi so as to allow data download remote control or diagnostics using the LPA View software This is the circular connector furthest from the hydraulic connection This c...

Страница 41: ... modes This is the circular connector closest to the hydraulic connection Figure 14 1 Machine Connector External Wiring Example In Figure 14 1 an example installation is shown 14 2 DC Power DC power is connected to pins 7 and 8 of either circular connector Red and Blue if using the pre wired cable All the other signals are optional ...

Страница 42: ...he standard LPA View software from MP Filtri UK itself uses Modbus to communicate with the ICM but it is also possible for customers to implement their own controllers see chapter 18 The CANbus protocol can also be used see separate ICM CANbus manual Figure 14 2 PC Control Example Figure 14 2 shows a single ICM linked to a PC using a USB RS485 adaptor 100 Ohm termination resistors should be fitted...

Страница 43: ...5 trunk Either individual DC supplies can be used to power each ICM or a single supply run through the trunk cable Figure 14 4 shows how to connect the ICM RDU Remote Display Unit The RDU is used when the ICM location is not convenient for an operator It can control and monitor a remote ICM as well as allowing an external controller to be connected to it for data download for example ...

Страница 44: ...her from a PLC or using a manual switch and indicators Figure 14 5 Switched I O Signals In order to reduce wiring the input and outputs all connect together on one side see Figure 14 5 However they are optically isolated from the rest of the system so can be used to switch unrelated signals 14 5 Start Signal The start signal is an opto isolated input that can be used to start a test This could be ...

Страница 45: ...determined by the Alarm Mode setting see 12 8 3 The outputs are voltage free contacts that can switch AC or DC signals up to 36V nominal 60V absolute maximum peak voltage Item Minimum Maximum Voltage 36V DC Current 0 5A 14 7 4 20mA Connection See Figure 14 6 for a schematic The two 4 20mA outputs are sourced from the main supply voltage DC These may be connected to the 4 20mA inputs of a process i...

Страница 46: ...46 Electrical Interface For details of how the test results are represented by the 4 20mA signals see chap ter 20 ...

Страница 47: ...Electrical Interface 47 Figure 14 6 ...

Страница 48: ...sure Off Line Operation Figure 15 2 ICM working pressure generated by hydraulic component 3 Very Low Flow Systems Figure 15 3 Entire system flow rate is within the range of the ICM 15 1 Flow Rate 15 1 1 Summary For the majority of systems a differential pressure of a few Bar will generate an in range flow for an ICM connected using two 1 5 meter lengths of Mini mess ...

Страница 49: ...low and determining the resulting pressure drop across the ICM and connection piping Use Figure 15 4 on page 51 to lookup the ICM pressure drop and manufacturers data to lookup the piping pressure drop at the desired flow The sum of these two pressures is the pressure needed The user connects the ICM between two points in the hydraulic circuit that have this pressure difference In order to use the...

Страница 50: ...ctor or even a piece of piping if it has a suitable pressure drop across it If none of these options is feasible then an active flow controller will likely be needed see 15 3 Otherwise connect the ICM across the points identified taking care to maintain an upward flow of oil through the unit this reduces trapped air Of course in a real system the pressure and viscosity will vary with temperature a...

Страница 51: ...the outlet of the ICM This should only be done where the available pressure is less than twice the maximum value calculated This is because the small orifice size needed to control the flow from a pressure larger than this has a risk of blockage The flow controller must be fitted to the outlet only If fitted to the inlet it will have a filtering effect The flow controller must be fitted directly t...

Страница 52: ...ing a constant flow rate even with a vary ing inlet pressure provided this pressure stays above a minimum working value Below this pressure the valve is wide open so has little effect i e the flow will be less than the 200ml min controlled value This minimum working value will be typically 5 10 bar but will vary with viscosity For these lower pressures a flow control valve is not needed and other ...

Страница 53: ...counts 4 Logging Fault with data logging memory 5 Water Sensor Fault with the water sensor 16 2 Test Status The status is shown on the ICM screen This contains a number indicating the current state of the ICM according to Table 16 1 This allows a system to remotely monitor the ICM operation if desired allowing more specific diagnostics 18 17 The unit will still work but may be more susceptible to ...

Страница 54: ...i mess hose has been fully connected at both the system and ICM ends Confirm that the flow through the ICM is within the range of the unit High water aeration levels Remote Device dialogue not responding to buttons being pressed Check that correct COM port has been selected in the Remote Device dialogue Check USB driver has been installed Disconnect power supply to ICM and then reconnect it If the...

Страница 55: ...Fault Finding 55 DO NOT USE ACETONE ...

Страница 56: ...ation A longer test time enables the unit to average out variations in cleanliness and produce a more stable result This is especially true for the larger particle sizes In clean systems there are very few of these so a large amount of fluid needs to be sampled in order to count a statistically significant number Another factor is the flow rate This can be traded off with cycle time since a higher...

Страница 57: ...te Considerations 57 10 100 1000 0 1 2 3 4 5 6 7 Test Time seconds for 20 counts ISO Code 400ml minute max flow 200ml minute ideal flow 20ml minute min flow Figure 17 1 Test Time needed for Reliable Indication22 by ISO code ...

Страница 58: ...hine control vehicle control or factory monitoring system Customers wishing to implement their own modbus controller software will need to refer to the full ICM Modbus Programming Manual however a simple example is given here 18 1 Reading the Result Codes The simplest arrangement is to configure the ICM to test continuously with a set interval between tests For example a Test Duration of 2 minutes...

Страница 59: ...M can also communicate using CANbus Communication is via raw CANbus frames but the message IDs have been chosen to be compatible with both the J1939 and CAN Open standards For more details refer to the separate ICM CANBUS manual ...

Страница 60: ...S 12 20mA OVERRANGE Output B RH 4mA 0 RH 𝑚𝐴 4 100 16 5mA 6 25 RH 20mA 100 RH 20 2 Time Multiplexed Schemes These output the result parameters on a single output A in a timed sequence This mode would be used to read the result parameters in to a PLC The PLC would need to be programmed to read each parameter at the correct time These modes are still under development please contact MP Filtri UK for ...

Страница 61: ... max legal measurement value unavailable 24mA 20 2 2 Temperature Coding The temperature in degrees C is encoded according to the formula 𝑚𝐴 10 𝐶 10 20 3 or 𝐶 𝑚𝐴 10 10 20 4 20 2 3 NAS1638 AS4059E1 ISO11218 Parameters are output in the sequence SYNC CLASS CLASS 5 15um CLASS 15 25um CLASS 25 50 CLASS 50 100 CLASS 100 RH TEMP These contamination classs are encoded as 𝑐𝑙𝑎𝑠𝑠 𝑚𝐴 7 20 5 For example Class ...

Страница 62: ...𝑒 2 2 20 8 or 𝑐𝑜𝑑𝑒 2 𝑚𝐴 6 2 2 𝑚𝐴 14 20 9 so that 6mA 2 000 6 5mA 1 00 7 0mA 0 7 5mA 1 13mA 12 max valid reading 20 mA overrange 20 3 Time Multiplexed Scheme 2 This outputs the parameters as currents using values designed for viewing directly on a programmable process meter There is no sync value but the final parameter stays on for 2 seconds instead of 1 To avoid confusion the RH channel does not ...

Страница 63: ...lating in the system in areas of low flow This can lead to corrosion and accelerated wear Similarly fire resistant fluids have a natural water content which may be different to mineral oils Saturation Levels Since the effects of free also emulsi fied water is more harmful than those of dissolved water water levels should remain well below the saturation point However even water in solution can cau...

Страница 64: ...Appendix A 64 Measuring Water Content Typical Water Saturation Levels For New Oils Figure 1 Examples Hydraulic oil 30 C 200ppm 100 saturation Hydraulic oil 65 C 500ppm 100 saturation ...

Страница 65: ...d contaminant particles in a sample The code is constructed from the combination of three scale num bers selected from the following ta ble The first scale number represents the number of particles in a mil lilitre sample of the fluid that are larger than 4 µm c The second number represents the number of particles larger than 6 µm c The third represents the number of particles that are larger than...

Страница 66: ...06 1999 Cleanliness Code System Microscope counting examines the particles differently to APCs and the code is given with two scale numbers only These are at 5 µm and 15 µm equivalent to the 6 µm c and 14 µm c of the APCs ...

Страница 67: ...permitted of 100ml volume at various size intervals differential counts rather than using cumulative counts as in ISO 4406 1999 Although there is no guidance given in the standard on how to quote the levels most industrial users quote a single code which is the highest recorded in all sizes and this convention is used on the ICM software Figure C 1 CONTAMINATION LEVEL CLASSES according to NAS1638 ...

Страница 68: ...particle counter e g ICM Size range μm c 6 14 14 21 21 38 38 70 70 Class 00 125 22 4 1 0 0 250 44 8 2 0 1 500 89 16 3 1 2 1 000 178 32 6 1 3 2 000 356 63 11 2 4 4 000 712 126 22 4 5 8 000 1 425 253 45 8 6 16 000 2 850 506 90 16 7 32 000 5 700 1 012 180 32 8 64 000 11 400 2 025 360 64 9 128 000 22 800 4 050 720 128 10 256 000 45 600 8 100 1 440 256 11 512 000 91 200 16 200 2 880 512 12 1 024 000 18...

Страница 69: ...2 432 432 76 13 2 4 12 500 4 864 864 152 26 4 5 25 000 9 731 1 731 306 53 8 6 50 000 19 462 3 462 612 106 16 7 100 000 38 924 6 924 1 224 212 32 8 200 000 77 849 13 849 2 449 424 64 9 400 000 155 698 27 698 4 898 848 128 10 800 000 311 396 55 396 9 796 1 696 256 11 1 600 000 622 792 110 792 19 592 3 392 512 12 3 200 000 1 245 584 221 584 39 184 6 784 1 024 Table D 2 AS4059E Table 2 Cleanliness Cla...

Страница 70: ...999 24 Most component manufacturers know the proportionate effect that increased dirt level has on the performance of their components and issue maximum permissi ble contamination levels They state that operating components on fluids which are cleaner than those stated will increase life However the diversity of hydraulic systems in terms of pressure duty cycles environments lubrication required c...

Страница 71: ...uct Hence there may be a possible source of conflicting information when comparing cleanliness levels recommended from different sources The table gives a selection of maximum contamination levels that are typically issued by component manufacturers These relate to the use of the correct viscosity mineral fluid An even cleaner level may be needed if the operation is severe such as high frequency f...

Страница 72: ...red the average level measured may well be one which could be made a bench mark However such a level may have to be modified if the conditions change or if specific contaminant sensitive components are added to the system The demand for greater reliability may also necessitate an improved cleanliness level The level of acceptability depends on three features the contamination sensitivity of the co...

Страница 73: ...tory servo systems 17 15 11 6 3 6 Robotic and servo systems 18 16 13 7 10 12 Very sensitive high reliability systems 20 18 14 9 12 15 Sensitive reliable sys tems 21 19 16 10 15 25 General equipment of limited reliability 23 21 18 12 25 40 Low pressure equip ment not in continuous service The table above is a guide to the recommended filtration level for various hydraulic components together with t...

Страница 74: ...critical part of many production processes It is therefore essential that the data they provide is both accurate and consistent Calibration ACFTD has been used as an artificial contaminant since the 1960s and its original particle size distribution was determined using an optical microscope This particle size distribution subsequently formed the basis of ISO 4402 the method for calibrat ing APCs D...

Страница 75: ...ze distribution This gives the trace ability required by ISO 9000 QS9000 and similar quality management systems A procedure for determining the performance of APCs so that minimum acceptable levels can be set by the user Improved calibration techniques and procedures More accurate calibration Improved levels of particle count reproducibility with different equipment More accurate and consistent fi...

Страница 76: ...sure consistency in data reporting As the counts derived by microscope counting methods are not affected the particle sizes used for microscopy will remain unchanged i e at 5 and 15 µm To clarify matters still further ISO standards written around the new test dust will utilize a new identifier c Hence µm sizes according to the new ISO 11171 will be expresses as µm c and Beta ratios according to IS...

Страница 77: ...e Obtained Using ACFTD ISO 4402 1991 ISO NIST MTD ISO 11171 µm µm c 1 4 2 2 4 6 3 5 1 4 5 8 5 6 4 6 7 1 7 7 7 8 8 4 9 9 1 10 9 8 11 10 6 12 11 3 13 12 1 14 12 9 15 13 6 16 14 4 17 15 2 18 15 9 19 16 7 20 17 5 21 18 2 22 19 0 23 19 7 24 20 5 25 21 2 26 22 0 27 22 7 28 23 5 29 24 2 30 24 9 31 25 7 32 26 4 33 27 1 34 27 9 35 28 5 36 29 2 37 29 9 38 30 5 39 31 1 40 31 7 Other Standards Although the IS...

Страница 78: ...F 16 14 11 5 2 17 15 09 400 17 15 10 800F 17 15 12 6 3 18 16 10 800 18 16 11 1 300F 18 16 13 7 4 19 17 11 1 300 2000F 19 17 14 8 5 20 18 12 2 000 20 18 13 4 400F 20 18 15 9 6 21 19 13 4 400 6 300F 21 19 16 10 22 20 13 6 300 22 20 17 11 23 12 14 15 000 23 21 18 12 24 22 15 21 000 25 23 17 100 000 Table 1 28 All section headings indicated with are reproduced by kind permission of British Fluid Power...

Страница 79: ...hich can be sealed off from the surrounding environment Do exercise care and use funnels when filling tanks with fluid Do utilize stainless steel and methods such as electro polishing in the design of system components upstream of your first filter set Do perform off line analysis in a controlled environment such as a laboratory which should contain fewer airborne contaminants that where the sampl...

Страница 80: ...nternal corners etc Don t assume that if a sample looks clean that it is You wont be able to see the contaminants Don t perform off line analysis in an un controlled environment E g workshop Don t rely on a single test for a capable representation of your system Don t start using your system process until it has gone through a commissioning period whereby contamination levels are relatively stable...

Страница 81: ...the right to alter specifications without prior notice Except as permitted by such licence no part of this publication may be reproduced stored in retrieval system or transmitted in any form or any means electronic mechanical recording or otherwise without prior written permission of MP Filtri UK ...

Страница 82: ......

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