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Transpector CPM Operating Manual
10.6.2.6.2 Peak Lock
Figure 10-49 Peak lock
Peak Lock is a method of fine tuning the sensor while it is collecting data. Peak
Lock is only available when running at 1 ppamu (either in spectrum mode or
selected masses mode). Peak Lock collects data around the peak while looking for
the maximum signal. Peak Lock then defines the maximum signal as being the true
location of the mass of interest. This is helpful because peaks can drift as a sensor
runs, but retuning constantly can be too time consuming.
It is recommended that Peak Lock be turned On. Peak Lock should only be
disabled if extremely fast data acquisition is needed and the peak position is
carefully set.
10.6.2.7 Inlet
Defines the inlet that is opened for the run, and whether it is closed after the data
acquisition is over. (See Figure 10-50.)
Figure 10-50 Inlet
None does not open any valves for the data acquisition. This would give data
that is only representative of the background of the CPM.
LP opens the V1, low pressure valve.
HP with bypass opens the V2, high pressure valve, with the bypass valve, V4.
HP without BP opens the V2, high pressure valve, without the bypass valve.
This is not recommended because the response time of the CPM can be much
slower without the bypass.
Bypass opens the V4, bypass valve.
HC opens the V3, high conductance valve. This valve is used primarily to
monitor process chamber background and should not be used for higher
pressures.
Cal Gas opens the V5, calibration gas valve. With this valve open, the sensor
will only monitor the calibration gas. This is useful when tuning and calibrating
the sensor.
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