Preparing for Measurement
3-23
IM AQ6380-02EN
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App
Index
3.7 Purge
CAUTION
• NEVER use a flammable gas to purge the AQ6380.
• The purge gas must be free of moisture, oil, carbon dioxide and other reactive or infrared-
absorbing materials.
French
ATTENTION
• N’utilisez JAMAIS de gaz inflammable pour purger le AQ6380.
• Le gaz de purge doit être exempt d’humidité, d’huile, de dioxyde de carbone et d’autres
matériaux absorbant le rayonnement infrarouge.
Principles and objectives
Water vapor present in the monochromator absorb light in the 1350–1450 nm area, resulting in
ripples in the measurement waveform.
The AQ6380 can be purged with high purity nitrogen or purge gas in order to reduce water vapor
absorption lines in the measurement results. Nitrogen gas is recommended for AQ6380 which has
hygroscopic optical components and ambient water vapor may interfere with measurements.
CAUTION
The instrument warranty will be void if damage is caused by the use of inappropriate facilities.
French
ATTENTION
La garantie de l’instrument est nulle si les dommages sont causés par l’utilisation de locaux
inadaptés.
Nitrogen purge equipment
The nitrogen purge equipment is NOT supplied by YOKOGAWA, but the required hardware is
available from appropriate commercial suppliers.
The on/off valve, the pressure regulator, the flowmeter and the tubing must be dry, oil-free and
uncontaminated.
Supply tubing
The AQ6380 has 1/4” outer diameter quick connectors on the back panel. Use clean flexible 1/4”
outer diameter nylon tubing (6 mm inner diameter) and never use rubber tubing.
