Teledyne 6200T - Sulfides Analyzer - Manual (Page 234)

Maintenance Model 6200T Total Sulfur Analyzer
234 Teledyne Analytical Instruments
11.3.8.1. Checking the Scrubber for Leaks
Leaks in the outer tubing of the scrubber can be found using the procedure described in
Section 11.3.6. Use the following method to determine if a leak exists in the inner
tubing of the scrubber.
This procedure requires a pressurized source of air (chemical composition is
unimportant) capable of supplying up to 15 psiA and a leak checking fixture such as the
one illustrated in Figure 11-3.
Vacuum/Pressure
Gauge
Manual Shut-Off
Valve
Needle Valve
FROM PUMP or
PRESSURIZED
AIR SOURCE
TO SCRUBBER
Figure 11-3: Simple Leak Check Fixture
1. Turn off the analyzer.
2. Disconnect the pneumatic tubing attached to both ends of the scrubber’s inner
tubing.
3. One end is connected to the sample particulate filter assembly and the other end
is connected to the reaction cell assembly.
4. Both ends are made of the 1/8" black Teflon tubing.
5. Cap one end of the hydrocarbon scrubber.
6. Attach the pressurized air source to the other end of the scrubber inner tubing
with the leak check fixture in line.
Pump
or
Pressurized Air
Source
Leak Check
Fixture
Scrubber
Cap
Figure 11-4: Hydrocarbon Scrubber Leak Check Setup
7. Use the needle valve to adjust the air input until the gauge reads 15 psiA.
ATTENTION COULD DAMAGE INSTRUMENT AND VOID WARRANTY
Do not exceed a pressure of more than 15 psia.
Do not pull the vacuum through the scrubber.
8. Close the shut-off valve.