S.E. International Inspector Xtreme USB Spécifications télécharger pdf (Page 18)

Procedure (Metric Units)

1. Aach the Wipe Test Plate and power on the Inspector. Make sure the Inspector is in Total/Timer

mode, displaying COUNTS.

2. Place the Inspector in the locaon where the eciency calibraon will be performed and take a count

of at least ten minutes. Mulply the acquision me by 60 to convert it from minutes to seconds.

Divide the total number counts by the acquision me (in seconds) to calculate the background

counng rate (RB) in cps. Record this value.

3. Center the rst source to be used into the Wipe Test Holder and take a count of at least one minute.

Divide the total number of counts by the counng me (in seconds) to calculate the gross count

rate (gcps or RG).

4. Calculate the eciency using the following equaon:

Where

E is instrument eciency in counts per disintegraon

RG is the gross count rate in counts per second (cps)

RB is the background count rate in cps

A is the acvity of the source in disintegraons per second (dps) or

becquerels (Bq)

5. Repeat Steps 3 and 4 for addional radionuclides.

6. If you would like to record eciency values in the Inspector’s memory for any of the supported

radionuclides (14C, 35S, 137Cs, 32P, 60Co, 90Sr/90Y, 131I, ALPHA), connue with the following steps.

7. Connect the Inspector to the PC running Observer USB using the USB cable. An applicaon window for

the Inspector should open within a few seconds.

8. Display the control panel by clicking View|Cal Panel…

9. Enter the updated eciencies in the appropriate elds.

10. If you would like the Inspector to display in acvity units (i.e., DPM) for a specic source instead of the

count rate (CPM), select it from the Applied Isotope dropdown box. Otherwise, leave as None

(cpm/cps).

11. When all relevant values have been updated, click the Update Sengs buon. Aer a second or two

the Inspector should beep twice to acknowledge receiving the updated sengs.

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S.E. International Inspector Xtreme USB Spécifications Page 18