RE-CALIBRATION PROCEDURE (at MP FILTRI locations)
MP Filtri UK Ltd will notify registered owners of the LPA2 Laser Particle Analyser; approximately one month prior to the recalibration date of the unit, that recalibration of their equipment is required. Upon receipt of this information owners are requested to acknowledge whether they require their unit to be recalibrated, and provide MP Filtri with an official work order number authorising recalibration of their equipment.
MP Filtri UK will only verify the accuracy of the LPA2 if the unit is recalibrated every twelve months.
It is requested that only the LPA2 , not the support case, be returned for recalibration.
Prior to dispatch please ensure that the contents of the LPA2 's memory have been downloaded, if previous test results are required.
Please ensure that the LPA2 is packaged appropriately for transportation; the LPA2 is an instrumentation product, and forwarded to: MP Filtri UK Limited.
MP Filtri UK will acknowledge receipt of the LPA2 and undertake a standard recalibration procedure. The standard recalibration consists of: -
- An external inspection of the complete assembly for signs of damage.
- Open the LPA2 and visually inspect all components. (Replace minor components where necessary).
- Inspect and interrogate the on board computer processor to verify that the laser's performance is within specification.
- Full function test is carried out on the pressure reducing valve and if necessary the seals are replaced and the valve is reset to the specification.
- Replace the seals in the flush valve and test the servo valve.
- All internal fluid fittings and pipework are replaced.
- Replace the internal Ni-Cad battery.
- Recalibrate the LPA2.
- Carry out a full high pressure function test to 500 bar working pressure.
- Update the operating software to the latest standard.
- Close the unit and replace the paper roll and the warranty labels.
- Issue a new handbook to the latest standard.
- Issue a recalibration certificate.
Accuracy of the LPA2 Laser Particle Analyser will then be assured for a further twelve months.
Recalibration will take approximately 5 working days. If a replacement unit (UK only) is required for this period please notify MP Filtri UK at the earliest opportunity.
The above recalibration procedure does not include the replacement of any damaged components that have been deemed defective through excessive wear and tear, negligence or mis-use.
Prior to the replacement of any component, or any work not covered within the standard recalibration procedure, authority will be requested from the registered owner of the unit authorising remedial work. An estimate of the cost required to repair the unit will be provided to the owner of the unit before any remedial work is undertaken. The owner of the unit is to authorise that repairs are to be conducted upon receipt of the estimate quotation.
If any components from the support case require replacing, please notify MP Filtri UK and these will be dispatched with the LPA2 following recalibration. All consumables will be charged at list price, see attached.
Owners of LPA2's returned to the UK from outside the European Union should raise the appropriate export documentation (Form C88), clearly stating that the LPA2 is being returned to the UK for recalibration / repair under UK Customs and Excise IPR Authorisation Number IP/0929/003/11. This will avoid import duty being levied upon entry to the UK.
Carriage will be charged ex. Works.
SECONDARY CALIBRATION VERIFICATION PROCEDURE
Two oil samples have been supplied for the secondary calibration verification procedure.
Cleanliness of components is critical for the verification procedure therefore adhere to the instructions detailed within ISO 3722, or contained within the LPA2 User Guide when operating the Bottle Sampling Unit.
Sample 1
Labelled 'CLEAN OIL' is used to flush the connections and hoses of the LPA2 / PML2 prior to using the secondary calibration fluid - use this sample first.
Follow the procedure below for best results:
- Ensure all components are thoroughly cleaned and are to be operated in a clean-room environment.
- Vigorously agitate the fluid sample for 1 minute.
- Place the fluid sample into the Bottle Sampling Unit.
- Use the Vacuum Cap, (plain cap) and select Vacuum on the Bottle Sampling Unit. Turn on and de-aerate the fluid for 1 minute.
- Allow the fluid sample to rest for 30 seconds.
- Attach a cleaned sample tube to the spigot of the Bottle Sampling Unit cap - sample tube to be certified clean in accordance with ISO3722. Put this cap onto the Bottle Sampling Unit - select Sample and turn on to pressurise the unit.
- Operate the flush valve on the LPA2. Flush with approximately 75ml fluid (approx. 25 seconds). Do not allow the level of the oil to go below the sample tube. As this allows air into the hoses.
- Close the flush valve.
Please note: - when completed, remove the Bottle Sampling lid and stand on a beaker / bottle so that the sample tube is facing downwards and does not come into contact with any external surfaces.
Sample 2
This sample fluid has been produced using a suspension of Standard Reference Material 2806 Medium Test Dust in MIL-H-5606 Hydraulic Fluid upon primary test equipment certified by the Institute of Filtration and Techniques of Separation (IFTS) France.
As solid contaminants within the fluid will settle over time it is vital that the following procedures are undertaken to ensure that particulate distribution is uniform throughout the fluid sample.
- Vigorously agitate the fluid sample for 1 minute.
- Place the fluid sample into the Bottle Sampling Unit.
- De-aerate the fluid for 1 minute (Vacuum position with Vacuum Cap).
- Allow the fluid sample to rest for 30 seconds.
- Pressurise the Bottle Sampling Unit (Sample position with Pressure Cap).
- Select the Triple / Bottle test programme on the LPA2.
- Flush the LPA2 with approximately 25ml fluid (approx. 15 seconds).
- Close the flush valve and start the test programme.
Upon completion of the test procedure the LPA2 will report an ISO 4406 Code of 22/21/17. It is permissible for a deviation of 1 ISO code either side of ISO 22/21/17; i.e. 22/21/18 etc.
If the LPA2 does not report this code contact MP Filtri UK Ltd.
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