Bnc SAM 935 Portable Gamma Spectroscopy System Manual de usuario descargar pdf (Pagina 27)

SAM 935™ Instruction Manual 23

If the SAM 935 detects that the background reading is unusable or non-existent, it will present this

screen, which

requires

you to take a background reading:

4. To take the background reading, first remove the Cs137 standard from the vicinity of the detector.

Then press B

KG (F2) to begin acquiring the background spectrum.

5. The automatic background adjustment will take 1

minute (the factory setting); the spectrum will be dis-

played on screen as it resolves:

6. When the calibration adjustments are done, the dose rate monitoring screen will appear and you

can begin taking samples:

4.3 Powering the SAM 935 Off

Whenever the SAM 935 is turned off, all information is saved in battery-backed-up RAM. This allows you to

start up again without loss of calibrations and other information. Note that if the internal lithium battery has

failed, the self-test display will indicate the problem.

1. Power off the SAM 935 using the On/Off push button on the front panel, located behind the sliding

door.

Remove the Cs137 standard and press F2 to

immediately begin the background reading.

If the SAM 935 is unable to coarse adjust, it will tell you. (You may notice that the peak is too

far to the right of the screen or off the screen because the high voltage and gain are too high.)

If you see this message, it usually means the energy range was too high before the quick cal-

ibration was started. Press C

ANCEL and go to the Utilities menu to calibrate. When prompted

to reset hardware values, answer Y

ES. Perform a coarse calibration and background reading;

the fine calibration does not need to be redefined if the last one was valid.

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 ... 69 70

Sin comentarios

Bnc SAM 935 Portable Gamma Spectroscopy System Manual de usuario Pagina 27