2-8
IM AQ6376-01EN
2.3 Purge
CAUTION
• NEVER use a flammable gas to purge the AQ6376.
• 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 AQ6376.
• 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 1800–1950, 2450–2950
nm area, resulting in ripples in the measurement waveform.
The AQ6376 can be purged with high purity nitrogen or purge gas in order to reduce
water vapor and carbon dioxide absorption lines in the measurement results. Nitrogen
gas is recommended for AQ6376 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 AQ6376 has 1/4” outer diameter quick connectors on the back panel. Use clean
flexible 1/4” outer diameter nylon tubing (6mm inner diameter) and never use rubber
tubing.