Placing The System In The Off Mode - Thermo Scientific Surveyor MSQ Plus Hardware Manual

Placing the System in the Off Mode

Thermo Scientific
4. If the Per Method Parameters table is not open, open it by clicking the Show Per Method
Parameters slide bar on the right side of the Tune window.
5. Turn off the nitrogen gas by clicking the Nitrogen Gas toggle On/Off button in the
General Control group of the Per Method Parameters table.
The On/Off button turns from green to gray and the text to the left of the button
changes from On to Off. Within a few seconds, you hear the nitrogen supply to the API
source shut off. In the Nitrogen Gas Off mode, the system maintains a bleed of nitrogen
gas to the probe to prevent a rise in humidity within the source compartment.
Place the Surveyor MSQ Plus MS detector in the Off mode if you are not going to use it for a
short period of time, such as overnight or over weekends. In the Off mode, the system is left
under vacuum, but the nitrogen flow is reduced to a bleed through the API probe, the
electron multiplier and conversion dynode are turned off, the power to the ion optics is
turned off, and the probe heater is turned off.
Therefore, placing the instrument in the Off mode allows you to conserve your laboratory
nitrogen supply and increase the lifespan of the electron multiplier. In addition, you can
restart and operate a Surveyor MSQ Plus MS detector that has been left in the Off mode
without waiting for the vacuum system to pump down to a working level.
Note
1. Leave the Surveyor MSQ Plus MS detector under vacuum when you are switching
the API probes. Do not vent the instrument unless you are performing a maintenance
procedure that requires you to break the integrity of the vacuum.
2. Before you place the Surveyor MSQ Plus MS detector in the Off mode, turn off the
flow from the LC pump and the flow from the optional cone wash pump.
You turn the MS detector off from the Status view in Xcalibur or from the Tune window.
This section contains the following topics:
• Turning the MS Detector Off from Xcalibur
• Turning the MS Detector Off from the Tune Window
6
System Shutdown, Startup, and Reset
Placing the System in the Off Mode
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