Residual Gas Analyzers.
Gas Analysis Systems
Quadrupole Operating Software.
The new 'Windows' RGA Software for the PC controlled mass spectrometers, has been designed to be 'user friendly' and very simple to learn and use.
When the ASI software is loaded the operator is prompted to switch on the control unit, confirm vacuum conditions are O.K. And given a choice between standard software or Auto-run
AUTO-RUN.
Only part of display shown
If Auto-Run has been selected the display will change to a table format. Filaments will switch on automatically. There will be a short delay whilst the filaments out-gas total pressure will be measured and then the instrument will start scanning over the first 80 amu. At the end of a scan the software will select the 8 largest peaks in the spectrum and display these in order on the table. The mass, gas and percentage for each gas will be indicated. The software will continue to monitor these major peaks, and comments will appear giving vacuum diagnosis, conditions, vacuum problems and how the vacuum conditions are changing. This auto-Run facility is mainly for the system user, who uses the RGA as a diagnostic tool and problem solver. All by the pressing of a single button.
At the bottom of this display are 3 buttons. One which closes this operating mode and returns the user to the main display modes, the second allows the whole process to start again and the third button takes the user direct to leak detect mode.
Bar Graph Mode.
In Bar graph mode a region of the mass spectrum is measured at integral values of mass number and the resulting partial pressures are plotted against mass number in a bar-graph format. The first mass and scan width of the display can be quickley changed by the adjustment of scroll bars and the instrument gain range can be quickly changed from the gain display panel
Channel and Trend
The Channel and Trend modes are identically operationally but differ in the way that recorded data is presented. In both cases the mass spectrometer makes measurements of partial pressure at up to 16 mass numbers using previously defined gain ranges and detectors.
Trend and Leak Detect
This display option allows the partial pressures of up to 16 masses to be plotted against time. The plot interval can be selected and each mass is depicted as a different colored line. The leak detect mode is a single channel version with the default mass 4 selected for helium.
Analog Display
This is mainly used for checking on the analyzer condition. It allows the peak shape and resolution of the analyzer to be monitored and also simplifies the checking of mass alignment.
Top Tool Bar
File menu
SAVE SETTINGS. Saves all the current user settings into a text file. These include first mass Scan width, gain, channel peak information, detector, etc.
LOAD SETTINGS. Loads all the last saved setting information. This is also automatically loaded during boot-up of the software, so the instruments returns to the same condition, and settings as it was when switched off.
SAVE SPECTRA. Saves the current spectra at the end of scan into a text file along with all instrument parameters and date /time information.
RETRIEVE SPECTRA. Retrieves spectra from file. The software reconstructs and displays the spectra and all instrument settings at the time the spectra was saved.
PRINT. Prints hard copy of the current displayed spectra in graphical form.
EXIT. Automatic shut down of instrument and software.
Display Mode menu
Selects one of the 5 main operating modes. Bar Graph, Analogue, Channel, Trend and Leak Detect.
System menu.
Selection of set up menus and engineers panels for testing hardware and configuring the software to the hardware in use.
Options menu.
Provides special modes of operation. Single Ion monitor, Total Ion Monitor over a pre-selected mass.
Allows leak mass to be changed, and allows selection of special software on ASI Gas analysis Systems.
Scan menu.
Selects different fast scanning options, and single shot/normal scan mode.
Bottom Tool Bar
Filament Control Panel.
Allows filaments to be selected ON/OFF with single button operation.
Detector Control Panel.
FARADAY button. Selects Faraday plate ion detector mode.
S.E.M. Button. Switches on the high voltage to the Secondary electron multiplier. (Dual detector instruments only).
CAL. Button. Automatically calibrates the electron multiplier to a pre-set gain. A Calibration panel indicates progress and gain achieved at completion.
Scan Control Panel.
START button. Starts the instrument mass scan. Either from the first mass, first channel, or last stop position.
STOP button. Stops the current scan in its present mass/channel position.
RESET button. Resets the mass scan to first mass or channel 1, in either start or stop mode.
Precision Code.
UP/DOWN buttons. Gives selection of 12 precision codes. Higher code number increases the number of peak readings, integration's, and therefore gives give more accurate and reproducible results.
DELAY UP/DOWN buttons. Changes the delay before peak measurement starts. This facility is mainly used for the accurate measurements of very small peaks. It gives extra time for amplifier recovery following very large peak measurements. It is mainly used in ppb. detection level analysis.
INDEX.
INDEX button. Returns to main Index Panel. With a selection of Mass spectra and product information.
This software operates under 'Windows 95/98' and is compatible with the DQC2000 and AX-200 series of mass spectrometers manufactured by Larimax.
There are special versions of this software, which have been developed for our special gas analysis systems. These include Bio-Quad (Fermentation) and TGA-1 (Environmental) systems.
Larimax is a strongly design/development orientated company and additions and improvements will appear from time to time. Therefore ASI reserve the right to change specifications and features without notice.
E & OE.