| 摘要 |
A method for testing integrity of a hydrophobic, porous diaphragm filter (42) includes arranging the filter (42) in a non-wetted state in a test housing (30) so that the filter (42) divides an upstream housing region (30a) from a downstream housing region (30b), completely filling the upstream housing region (30a) with a test liquid that does not wet the hydrophobic diaphragm filter (42), incompletely filling a reservoir (12) that is connected to a liquid feed line (16) of the test housing (30), charging the reservoir (12) with compressed air at a constant pressure below the intrusion pressure of the filter, and determining a substance flow at the reservoir (12). The substance flow to be determined is a mass flow out of the reservoir (12) determined as a decrease in the overall weight of the reservoir (12). |
| 主权项 |
1. A method for testing the integrity of a hydrophobic porous diaphragm filter (42), comprising the following steps:
arranging the diaphragm filter (42) in the non-wetted state in a test housing (30) resistant to internal pressure, in such a way that the diaphragm filter (42) separates an upstream housing region (30a), which is provided with a liquid feedline (16), from a downstream housing region (30b), completely filling the upstream housing region (30a) with a test liquid which does not wet the hydrophobic diaphragm filter (42), incompletely filling a reservoir (12) resistant to internal pressure, which is connected to the liquid feedline (16) of the test housing (30) and is connected to a regulatable compressed-air supply (20, 22, 24, 26), charging the reservoir (12) with compressed air at a constant pressure below the intrusion pressure of the diaphragm filter, determining of a substance stream for the reservoir (12) as a measure of the quantity of test liquid penetrating into and/or through the diaphragm filter (42),wherein the substance stream to be determined is a mass flow out of the reservoir (12), which is determined from a decrease in the overall weight of the reservoir (12). |
