Bnc SAM 935 Portable Gamma Spectroscopy System Manual de usuario descargar pdf (Pagina 15)

SAM 935™ Instruction Manual 11

2. Select

Calibrate Area Monitor

from the menu:

The 3 steps needed to perform a recalibration are listed in the order they should be done:

3.2.1 Automatic Coarse Calibration

This process requires only a Cs137 source. It may take up to several minutes depending on the activity of

the source.

1. Press the U

TIL key.

2. Select

Calibrate Area Monitor

from the list.

3. Select

Coarse Adj With Cs137

from the list, or just press F2.

4. If your SAM 935 was factory-calibrated, you will see the message below. Press Y

ES (F3) the first

time you do a coarse calibration; this will cause the SAM 935 to start its hardware adjustment algo-

rithm from scratch. Answer N

O (F2) after the initial coarse adjustment (this will also make the cali-

bration process quicker).

5. Point the right front corner of the detector at the Cs137 standard (of approximately 0.5 to 2.0 µCi)

and press S

TART (F2) to begin data acquisition.

Before beginning the recalibration process, make sure the proper detector is selected using

the

Select/Edit Detector

function under the UTIL

key.

Answer Yes the first time you do a coarse calibration;

answer No thereafter.

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Bnc SAM 935 Portable Gamma Spectroscopy System Manual de usuario Pagina 15