ORTEC Micro-Detective-HX, Руководство по эксплуатации

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3. GETTING STARTED
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3.3.4.1. Setting the Maximum Background Count Rate
To change the maximum acceptable count rate for the background measurement:
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From the Home screen, navigate to Main Menu, Settings, Advanced (password), Limits,
Max Bkg.
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Clear the existing count rate, enter the new value, and select Done.
3.3.4.2. Setting the Minimum Background Measurement Time
This feature lets you specify the minimum data collection time for each background measure-
ment, in minutes, according to your CONOPS. The minimum time is 1 minute. As noted above,
if a user stops the background measurement before the minimum time has elapsed, the HX does
not accept (does not save and use) the new background spectrum. It continues using the existing
background file until a new background measurement is successfully completed or until the
interval between required backgrounds expires.
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From the Home screen, navigate to the Main Menu, then to Settings, Advanced (password),
Limits, Bkg Acq Time.
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Clear the existing period, enter the new one (in minutes), and select Done.
3.3.4.3. Setting the Background Update Interval
The HX allows you to set a maximum time between background updates, in days. The Home
screen then displays the date and time when the next background measurement will be required.
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From the Home screen, navigate to the Main Menu, Settings, Advanced (password),
Limits, Bkg Period.
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Clear the old period, enter the new one (in days), and select Done.
3.3.4.4. Performing the Background Measurement
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From the Home screen, navigate to the Main Menu, Settings, then select Background. The
Background screen (Fig. 20) will be displayed, and acquisition will start immediately.
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If the site background exceeds your preset background threshold (Max Bkg) for more than a
few seconds, the background measurement will halt and an error message will be displayed.
Remove any sources causing an elevated background or move the instrument to lower-
background area, then resume the background measurement; or cancel the measurement, set