Originally Posted By: goodtimes
I used your quote about the 10 micron test limit. So now you come up with something to say that's wrong too. Maybe the extra counter is the 16889 test calibration as it contains 50 like Mann uses, whereas the other only goes to 40.
Sorry to say you're not grasping the statement in the ISO 4548-12 summary about the 10 micron limit correctly.
"This test is intended for applications to filter elements with an efficiency of less than 99% at particle size greater than 10 microns."
That means ISO 4548-12 should not be used if the filter has an efficiency that is better than 99% at 10 microns. For instance, if it's 98.9% >10u 4548-12 should be used. If it's 99% >10 microns then don't use 4548-12, but instead use 16889. The Ultra for instance is 99% >20 so it obviously should be tested per ISO 4548-12. I'd think practically every high efficiency lube filter made for IC engines are going to be less efficient than 99% >10u so 4548-12 would be the stipulated and correct efficiency test to use.
And just what did I say that's wrong? ... they weren't related comments. No, the "extra counter" is not for ISO 16889 because the Section 9.3.7 I showed is right out of ISO 4548-12 which has nothing at all to do with ISO 16889. That's also why the report table in 4548-12 I showed has spots to report the >5 micron particle measurements.
I used your quote about the 10 micron test limit. So now you come up with something to say that's wrong too. Maybe the extra counter is the 16889 test calibration as it contains 50 like Mann uses, whereas the other only goes to 40.
Sorry to say you're not grasping the statement in the ISO 4548-12 summary about the 10 micron limit correctly.
"This test is intended for applications to filter elements with an efficiency of less than 99% at particle size greater than 10 microns."
That means ISO 4548-12 should not be used if the filter has an efficiency that is better than 99% at 10 microns. For instance, if it's 98.9% >10u 4548-12 should be used. If it's 99% >10 microns then don't use 4548-12, but instead use 16889. The Ultra for instance is 99% >20 so it obviously should be tested per ISO 4548-12. I'd think practically every high efficiency lube filter made for IC engines are going to be less efficient than 99% >10u so 4548-12 would be the stipulated and correct efficiency test to use.
And just what did I say that's wrong? ... they weren't related comments. No, the "extra counter" is not for ISO 16889 because the Section 9.3.7 I showed is right out of ISO 4548-12 which has nothing at all to do with ISO 16889. That's also why the report table in 4548-12 I showed has spots to report the >5 micron particle measurements.