CONVERTER CHARGE

Upon completion of the bench test, the converter is charged with gaseous oxygen to 25 to 30 psig to prevent entry of moisture and other contaminants during shipment/storage. To charge the converter, proceed as follows:

1. Secure the converter in the rack on the test stand countertop, unless it is already there.

2. Using the Test Stand Hose Assembly, P/N 59A120-B547, connect the test stand BELL JAR

Figure 12-19.-Bench test decal.

BOTTOM COUPLING, C-1, to the converter quick-disconnect coupling.

3. Open the TEST PRESSURE GAUGE-TO-BELL JAR valve, V-2.

4. Opening the OXYGEN SUPPLY valve, V-6, slowly charge the converter to 25 to 30 psig. Pressure will be indicated on the TEST PRESSURE gauge, PG-1.

5. Close the OXYGEN SUPPLY valve, V-6. Disconnect the hose assembly connected in step 2, and bleed the test stand using SYSTEM BLEED valve, V-5. Secure all test stand valves.

6. At this point, enter the amount of the converter charge in section 11 of the Performance

Test Sheet, and you and a CDI sign the sheet. The original, or a copy of the Performance Test Sheet is forwarded to the operational custodian of the converter.

7. Mark the due date of the next bench test on the bench test decal (fig. 12-9). Due date is 231 days from the last bench test date. Affix this decal to the converter in a position in which it will be visible when the converter is installed in an aircraft.

8. Install dust covers or plugs in/on all open couplings prior to shipping or storage of the converter.