Operation
Setting the Purge Gas Controls
6
Nicolet iS20 User Guide
Thermo Scientific
Setting the Purge Gas Controls
You must connect a source of purge gas (dry air or nitrogen) to purge your instrument of
moisture and other environmental contaminants. For best results the purge gas should be
dried to a dew point of -70 °C (-94 °F) or below. Use the following instructions to set the
purge gas controls.
1. Open the shutoff valve.
2. Adjust the pressure regulator until the gauge indicates that the pressure is between 0.7 and
1.4 bar (70 to 140 kPa, or 10 to 20 psig).
NOTICE
We recommend that you maintain seal and desiccation and/or purge your
instrument at all times. Equipment damage due to failure to maintain seal and desiccation
and/or purge is not covered under the warranty. If you have questions about this
requirement, please contact us.
CAUTION
Never use a flammable gas to purge your instrument. The purge gas must be
free of moisture, oil, carbon dioxide and other reactive or infrared-absorbing materials. To
prevent laser damage, use only dried air or nitrogen to purge your instrument.
