{"id":247,"date":"2015-02-04T14:07:22","date_gmt":"2015-02-04T14:07:22","guid":{"rendered":"https:\/\/staging-broadleyjameseu.mystagingwebsite.com\/?post_type=hpy_faq&p=247"},"modified":"2022-08-08T10:40:01","modified_gmt":"2022-08-08T10:40:01","slug":"how-do-i-test-my-oxyprobes","status":"publish","type":"hpy_faq","link":"https:\/\/staging-broadleyjameseu.mystagingwebsite.com\/fr\/faq\/how-do-i-test-my-oxyprobes\/","title":{"rendered":"How Do I test My OxyProbes?"},"content":{"rendered":"

Purpose for test:<\/strong><\/p>\n

Dissolved oxygen membrane cartridges contain an oxygen-permeable, polymer membrane, which is impermeable to liquid. Improper storage or accidental handling of the DO sensor or membrane cartridge can damage the polymer membrane. A hairline scratch, slight abrasion or any tear of the polymer membrane may render the cartridge inoperable. Often the damage may not be visible to the naked eye.
\n
\nSTEP 1. VISUAL EXAMINATION<\/strong>
\nRemove the membrane cartridge from its storage vial or from the dissolved oxygen sensor. Be careful not to scratch or abrade the polymer membrane portion of the cartridge.<\/p>\n

Visually inspect the outer surface polymer membrane for scratches, scars, abrasions or tears.
\n\"201a\"
\nSTEP 2. PLUNGER \u201cREADY\u201d POSITION<\/strong>
\nInstall the nosepiece onto the syringe and retract the plunger of the membrane tester to the \u201cready\u201d position as shown below.<\/p>\n

\"201c\"<\/p>\n

STEP 3. MEMBRANE CARTRIDGE INSTALLATION<\/strong>
\nInsert the tip of the membrane tester into DI water to lubricate it before installing the membrane cartridge as shown below. Avoid excessive force.<\/p>\n

\"201d\"<\/p>\n

STEP 4. APPLYING PRESSURE TO THE MEMBRANE CARTRIDGE<\/strong>
\nSlowly compress the plunger until the membrane cartridge bladder slightly protrudes from the thumb and forefinger slots of the cartridge housing.<\/p>\n

\"201e\"<\/a><\/p>\n

STEP 5. MEMBRANE CARTRIDGE TEST<\/strong>
\nPlace membrane tester with the membrane cartridge into a beaker of DI water as shown. Make certain the front of the membrane cartridge is completely submerged.<\/p>\n

\"201f\"<\/p>\n

STEP 6. ASSESSING DAMAGED MEMBRANE CARTRIDGES<\/strong>
\nWhile maintaining a slight pressure on the plunger to keep the bladder extended, slowly rotate the test assembly in the water.<\/p>\n

\"201g\"<\/p>\n

Look for any signs of air bubbles which indicate a damaged membrane or bladder. Refer to the two illustrations for typical examples of air leaks found when the membrane has been damaged.<\/p>\n