
Chapter 7 PSD Analysis
7-16 PerSeptive Biosystems
7
Turning off
collision gas
To turn off the collision gas:
1. Turn the top 3-way valve on the CID box to the Purge
Cell position.
2. Wait approximately 20 seconds for the gas to evacuate.
3. Turn the top 3-way valve on the CID box to the Off
position.
Adjusting
collision gas
To optimize fragmentation, adjust the flow of the collision gas.
Turn the metering valve on the CID box until you observe the
desired fragmentation.
If gas pressure is too high, signal is suppressed. If gas
pressure is too low, you will not obtain the desired
fragmentation.
Adjusting Guide
Wire Voltage%
When using the CID option, you may observe enhanced
performance by increasing the Guide Wire Voltage% above
the setting used for PSD analysis without CID.
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