Step 2 – Filter Test скачать в хорошем качестве

Step 2 – Filter Test

Learn how to sample for particles and oil aerosol with the AirCheck Kit. Trace Analytics, LLC www.airchecklab.com Transcript: The 47mm filter cassette, either black or blue, collects samples for both particles and oil aerosol at the same time. Let’s figure out how long you need to run this part of the test. Take a look at the *data sheet and determine what type of sample you are taking. [Note: Do not change your pre-designated or purchased analysis package without speaking with a customer service representative as this may change results, reporting time, and analysis price]. If it states VALUE or BASIC – there is a corresponding line in the table. If it states PRO, DIAGNOSTIC or BASELINE – there are two lines to pick from. The first line is for samples requiring Class 1 limits which are more strict, the 2nd line is for Class 2 limits. The decision on which you choose will be up to your company’s requirements. If you see PRO on the data sheet, it’s easy, just look at the brackets for the purity classes. The numbers in the brackets are always in the order of particles, water, and oil [P:W:O]. So, for this demonstration, we know that the particle purity class is 2 so we’ll sample for a minimum of 1200 liters at 50 LPM for 24 minutes. If it states Baseline or Diagnostic, remember you’ll have to consult with whomever ordered the tests for your company to determine if the strictest limit and longer sampling time for Class 1 is appropriate for your requirements. Let’s program the timer for 24 minutes. Let’s get started with the filter test. Open the control valve or regulator on your sampling port. Adjust to get the recommended flowrate on the flowmeter, in this case we want 50 LPM. Start the timer and note what time you started the test on the datasheet along with the filter number in section 5a. If you are not able to achieve the minimum flowrate, then you’ll need to calculate a new sampling time to obtain the air volume required for your sample and reset the timer for the new sampling time. For example, if you can only get 25 LPM, then the equation is as follows... 1,200L / 25 LPM = a run time of 48 minutes. The filter cassette will stay in place during the remaining steps. It is accebtable to exceed the minimum air volume for the filter test. *Record the requested information in Section 5a of your datasheet. We will come back and record the total sample time in Step 5. Now that the filter test is running, you can proceed to the next step.