Set Purge Gas Controls; To Set The Purge Gas Controls - Thermo Scientific Nicolet Summit User Manual

Set Purge Gas Controls

Thermo Scientific
Correctly setting your purge gas controls will protect your spectrometer from humidity
without introducing vibration.
For best results, the purge gas should be dried to a dew point of -70 °C (-94 °F) or below.


To set the purge gas controls

1. Open the main valve to start the flow of purge gas through the regulator.
2. Adjust the pressure regulator for the spectrometer until the gauge indicates that the
pressure is 5 psig (34 kPa).
1. Set accessory flow
2. Set accessory pressure
3. Set the flowmeter for the spectrometer to 1 scfh (0.47 l/min).
4. If you are using an accessory that is purged, set the purge gas controls for the accessory as
indicated below.
• Accessory pressure, 5 psig (34 kPa)
• Accessory flow: 4 –10 scfh (1.9 – 4.7 l/min)
NOTICE Flow rates greater than recommended values can cause vibration, which can
affect the quality of your data.
3. Set spectrometer flow
4. Set spectrometer pressure
Install and Maintain a Purge Kit
Nicolet Summit User Guide 43