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Teledyne API Model 401 O
3
Photometric Calibrator Instruction Manual, 01124, Rev. J2
10.2 Leak Checking
There are two methods of leak checking:
1. By vacuum: This is the simplest method but it does not show the location of a leak.
2. By pressure: By using bubble solution, this method shows a leak location.
NOTE
Be careful using the bubble solution. There is no internal pressure,
the solution may enter and contaminate the cell. Use only bubbles,
not liquid.
If you know you have a leak, use pressure.
If you want to confirm that you do not have a leak, use vacuum.
10.3 Cleaning Of Sample Cell
1. Remove the center cover from the optical bench.
2. Loosen the screws that hold the retaining rings at each end of the glass tube.
3. Using both hands, rotate the tube to free it, then slide the tube towards the back of the
instrument (towards the lamp housing). The front of the tube can now be slid past the
detector block and out of the instrument.
CAUTION
Do not cause the tube to bind against the metal housings. The glass
tube may break and cause serious injury.
4. Clean the tube with soapy water by running a swab from end-to-end. Rinse with de- ionized
water, then isopropyl alcohol, then air dry. Check the cleaning job by looking down the bore
of the tube. It should be free from dirt and lint.
5. Re-assemble the tube into the lamp housing and leak check the instrument.
10-2