Agilent Single Quad 5975 GCMS Hardware Overview Video
Introduction
This learning video will cover the major components of the Mass Spectrometer. These include the E-MOD,
System connections, vacuum components and other parts.
Local User Interface - LUI
Lets start with the most visible part of the mass spectrometer. This is the Local User interface or louie for short. From here, you can configure network parameters, set and monitor source and quad temps, as well as control or view other functions.
Generally, the louie is mostly ignored by the user since almost all interaction is done with the software.
However, in some cases when software communication is not possible, this provides a way of knowing what the
status of the mass spectrometer is.
Let go over the buttons on the front of the louie. To scroll through the top level sections, press the menu button.
The top menus are M S parameters, Network, Version, Controller and Mass Hunter or Chemstation.
To scroll through the sub menus in each section press the Item button. In the display shown, we are in the M.S parameters section. To move through this section, press the item button. Next we see the turbo pump speed. Normally the turbo speed should be at 100%. Lower values indicate a problem with the M.S. The next item is source and quad temperatures. The default temperature for the source is 230 Celcius and 150 Celcius for the quad. Pressing the Item button once more, we see the error code status. A non-zero number here will tell you that the M.S has detected an error condition. The error codes can be viewed in the chemstation or mass hunter acquisition programs.
Calibrant bulb and valve
On the top of the M. S. is a bulb that holds calibration liquid and the vent knob. The bulb holds a half a mil of P F P B A used to calibrate the M. S. The calibration gas flows into the M.S when the valve is open. It is a two way solenoid that is actuated from the software. Also in this assembly is a round vent valve. Turning the vent valve counterclockwise allows ambient air from outside to enter the M. S. This equalizes pressure and allows the analyzer door to be opened. The source window allows the user to look inside the M. S. This is useful to view source connections as well as to see if the filament is turned on.
Right Side of Instrument
In this image, you can see the right side of the M S with the cover off. On the upper left you can see the transfer line, which is the heated interface with the GC. You can also see the turbo. The turbo shown here is a standard turbo, which is mounted under the manifold. You can also see the turbo power supply mounted towards the back. The large manifold contains the analyzer above the turbo, we will talk about that in a second.
Left Side of Intrument
On the left side of the M.S with the cover off we can see the analyzer. The analyzer is hinged onto the manifold, It can be swung away from the manifold to do maintenance or repairs. The analyzer consists of the source, the quad, and the detector all removable as a single piece. Two shipping screws secure the analyzer to the manifold. On the analyzer is quad driver which is mounted on the side board. The side board also provides electrical voltages and signals to the source and quad.
Back Side of Instrument
Let's look at the back of the instrument. On the right side we can see the smart card. The smart card is the main controller and houses the M. S. CPU. On the smart card we can see the LAN or Network cable connection, the start/stop synchronization cable and the serial A/B. Moving to the left side we see the A C board. The A C board has connections with the foreline pump and line voltage. On the top left side, we can see the high vacuum gauge, turbo, and roughing hose.
E-Module
Most of the electronic components are housed in the electronics module or E-Module for short. The electronics module sits on the lower left side when facing the front of the M S. It can be removed by unscrewing the retaining screw in the back as well as removing a plastic piece in the front. Once this is done, the entire E-Module can be removed as a single component. Typically, the E-Module is not a service part. Usually individual components of the E-Module are usually replaced.
This short clip will show you how the analyzer and E-module are positioned inside the Mass Spectrometer. See how the analyzer is hinged and can be swung out of position after the system has been vented. To remove the E-module, the retaining screw is first loosened in the back and the front plastic piece removed. After the connections on top and in back have been removed, the E-module slides out toward the front.
Pumps
The Agilent 5975 and 5973 series mass spectrometers have different pumps depending on the model and options installed. The high vaccum pump options are the diffusion pump, the standard turbo and the performance turbo. The performance turbo is standard when the Ci option is sold. The most common rotary pump is the fifer Duo 2.5. Another option for the rotary pump is the oilless scroll pump.
Gauges
To monitor both high or low vacuum, different types of gauges are available. On Diffusion systems, the foreline gauge is required. This monitors the low vacuum produced by the rotary pump. On performance system, a high vaccuum gauge
comes standard. Is optional on the diffusion and standard turbo models.
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