Table of Contents
Advertisement
Section 5: Moisture Measurement Mode
(3) For a liquefied gas sampler
CAUTION
Replace a drying tube cock of the titration cell top with one with a three-way cock.
Adjust the cock so that it is "T" and the outlet leads directly to the air.
Set a vinyl tube to the outlet and connect it to a gas flow meter.
1. Wash a sampler with a sample.
Connect a liquefied gas sampler to a line. Set the both ends of an inverted liquefied gas
sampler to "Open" to open a gas supply line and wash the inside of the sampler with the
sample.
2. Take the sample and weigh "W".
Set the outlet side of the liquefied sampler to "Close" and take a liquefied sample.
Set the long injection needle to the liquefied sampler and set a silicone rubber chip
to the needle end. Weigh the sample weight + tare "W".
3. Inject the sample.
Stick the needle to the rubber packing of the sample injection plug, open the valve,
and inject the sample. Insert the needle end to the bottom of a titration flask to absorb
sufficient water. Set the injection rate at 50 to 200ml/min.
If the injection rate is too fast, the area near the sampler outlet and the needle are cooled.
Moisture in samples attaches to the cooled area and values are lowered.
During measurement, heat the area near the sampler outlet and the needle with a dryer or a
ribbon heater.
4. Weigh "w".
After all or a part of the sample is injected, close the valve.
Weigh "w" (the liquefied gas sampler + the needle + the silicone rubber chip tare "w").
5-18
CA-200
Advertisement
Table of Contents
