Bnc SAM 935 Portable Gamma Spectroscopy System Manual de usuario

SAM 935™Surveillance and Measurement SystemInstruction ManualBerkeley Nucleonics Corporations3060 Kerner Boulevard #2San Rafael, CA 94901 USA800-234-7

6 SAM 935™ Instruction Manual2. Connecting HardwareThis chapter describes how to connect optional, peripheral devices to the SAM 935. The SAM 935 cons

SAM 935™ Instruction Manual 7Most printers compatible with the Epson command set (9-pin, 24-pin, and ink jet printers) are supported. If your printer

8 SAM 935™ Instruction Manual3. Configuring the SAM 935This chapter describes in detail how to set up the SAM 935 for daily operation. Most of the set

SAM 935™ Instruction Manual 9If you do not have an internal NaI detector, the SAM 935 will prompt you to check the cabling to the exter-nal detector a

10 SAM 935™ Instruction ManualThe dose rate analysis measures and records isotopes in dose rate units (rather than the confidence levels used by the M

SAM 935™ Instruction Manual 112. Select Calibrate Area Monitor from the menu:The 3 steps needed to perform a recalibration are listed in the order the

12 SAM 935™ Instruction ManualThe spectrum being measured will be displayed as it develops, and if everything is connected cor-rectly, you should be a

SAM 935™ Instruction Manual 134. The Preset Live Time screen will appear as shown below. Select a live time for background collec-tion and press ENTER

14 SAM 935™ Instruction Manual3.2.3 Fine Energy CalibrationIf the SAM 935 has not been previously fine energy calibrated with a multi-line standard su

SAM 935™ Instruction Manual 15If you are using another standard that does not match one in this list, you will have to define it in the Calibration St

2 SAM 935™ Instruction ManualFirmware Release 02.05.19U. S. Patent No. 5608222© 1995-1999 All rights reserved. Printed in U.S.A. - 03/30/00WARRANTYBer

16 SAM 935™ Instruction Manual8. The calibration report will appear on the display after you accept the calibration; scroll through it using the arrow

SAM 935™ Instruction Manual 173.2.4 Calibration with Three CoefficientsTo enter the energy calibration factors manually, the factors from a previous l

18 SAM 935™ Instruction Manual2. Select Area Monitor Setup. The Setup menu takes up several screens; the arrow keys will scroll through the setup scre

SAM 935™ Instruction Manual 19The value shown on this screen is the alarm trigger; an alarm will be generated and saved when-ever any monitored target

20 SAM 935™ Instruction Manual4. Operating the SAM 935If the proper procedures are followed, the SAM 935 will give an outstanding performance in monit

SAM 935™ Instruction Manual 212. If you do not have an internal NaI detector, the SAM 935 will prompt you to check the cabling to the detector after i

22 SAM 935™ Instruction Manual4.2.1 Quick Calibration AdjustmentAfter the self-test, the SAM 935 may prompt you to run a quick calibration adjustment

SAM 935™ Instruction Manual 23If the SAM 935 detects that the background reading is unusable or non-existent, it will present this screen, which requi

24 SAM 935™ Instruction Manual4.4 Taking Readings in Surveillance ModeThe monitoring display of the SAM 935 will look different depending on the opera

SAM 935™ Instruction Manual 254.5 Reviewing AlarmsThe SAM 935 can store over 250 alarm events. Each stored alarm consists of a spectrum and all of the

SAM 935™ Instruction Manual 1Table of Contents1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

26 SAM 935™ Instruction Manual4.6 The SAM 935 InterfaceThis section explains the SAM 935 interface controls.4.6.1 The Front PanelThe front panel of th

SAM 935™ Instruction Manual 274.6.2 Function KeysThe labels just above the function keys show what function each key will perform. Some function keys

28 SAM 935™ Instruction ManualEditing Text An example of text editing is shown in this Edit Standard Name screen. The current value of the text is sho

SAM 935™ Instruction Manual 294.6.5 The Utilities ScreenPress the UTIL key from the main screen to bring up the Utilities menu, which has more items t

30 SAM 935™ Instruction Manual5. SAM 935 Modes of OperationThe SAM 935 default operation is the Surveillance mode, also called dose rate monitoring. D

SAM 935™ Instruction Manual 31The Surveillance screen when alarms have been triggered looks something like this:The function keys on the Surveillance

32 SAM 935™ Instruction Manual•CAPTURE (F3) saves the currently displayed reading. The current alarm will be terminated when you press CAPTURE. If the

SAM 935™ Instruction Manual 33The Manual mode screen will appear:2. Begin taking readings. When a spectrum is displayed, the message line will normall

34 SAM 935™ Instruction Manual5.4.1 MCA PresetsWhen PRE ADJ (F4) is selected, the presets are displayed in the data area. When the presets are dis-pla

SAM 935™ Instruction Manual 355.4.2 Manual Hardware AdjustmentsHW Adj/HW Info This key switches the information displayed in the data window to the ha

2 SAM 935™ Instruction Manual5.6 Calibration Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

36 SAM 935™ Instruction Manual5.4.3 Manual Mode UtilitiesWhen you are in the Manual mode display, the UTIL key has a special function: it switches to

SAM 935™ Instruction Manual 37The peak labeling function allows you to display the gamma lines associated with particular nuclides superimposed on the

38 SAM 935™ Instruction ManualIf you are operating with a 5-second sample time (the default), a background of 180 seconds or longer is desirable.Once

SAM 935™ Instruction Manual 39After each adjustment attempt, a tone will sound to indicate that the SAM 935 is still adjusting itself. The SAM 935 beg

40 SAM 935™ Instruction Manual6. UtilitiesThe Utilities menu provides access to a variety of setup and database editing functions, most of which are d

SAM 935™ Instruction Manual 416.1 Area Monitor SetupThe Area Monitor Setup menu contains several options for configuring the SAM 935 in Monitor Mode.

42 SAM 935™ Instruction ManualTo change the sample time:1. Select Set Sample Time on the Area Monitor Setup menu:2. Use the ↑ and ↓ arrow keys to incr

SAM 935™ Instruction Manual 43F2, Edit an Isotope: Scroll down the list of isotopes to the isotope you wish to monitor. Press ENTER, and you will be

44 SAM 935™ Instruction Manual6.1.4 Preventing False AlarmsThe Hysteresis items in the Monitor Setup menu allow you to mask out unnecessary alarms.One

SAM 935™ Instruction Manual 45To change the Off Hysteresis:1. Select Set Off Hysteresis on the Monitor Setup menu:2. Use the ↑ and ↓ arrow keys to inc

SAM 935™ Instruction Manual 11. IntroductionWelcome to the SAM 935™, a portable surveillance and measurement system for detecting and identifying mult

46 SAM 935™ Instruction Manual2. If you know what the value should be, press F3 to manually edit the value:When finished, press ENTER to save the new

SAM 935™ Instruction Manual 478. It will take approximately 1-3 minutes to finish, at which time the display will show you the new dose rate calibrati

48 SAM 935™ Instruction Manual6.3.1 Adding a New IsotopeTo add a new isotope, press ADD (F2). A new entry will be added at the bottom of the list. The

SAM 935™ Instruction Manual 493. Edit the units for the half-life. The available half-life units are selected from a list as shown below:6.4 Edit Isot

50 SAM 935™ Instruction Manual4. When you have selected all the isotopes you want to print, press ENTER to send it to the printer.To print the entire

SAM 935™ Instruction Manual 514. For each isotope to be added, select an <unused> entry and press EDIT (F4).5. The Select Isotope screen will ap

52 SAM 935™ Instruction ManualEach detector has the following parameters associated with it:Name: The name for this detector.Diameter: Diameter of the

SAM 935™ Instruction Manual 53• The maximum uncertainty value (default 1.0) will require that a peak's counts be at least N times higher than the

54 SAM 935™ Instruction Manual6.11 Set Serial SpeedThis utility allows you to select from a number of possible RS232 transmission speeds for your SAM

SAM 935™ Instruction Manual 556. Repeat steps 3 and 4 to change the system time.7. Press ENTER at the time set screen to save your changes and return

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56 SAM 935™ Instruction Manual6.17 Switch to RemoteThe SAM 935 can be connected to a remote computer through a standard RS-232 COM port. Several ana-l

SAM 935™ Instruction Manual 577. ReportsExamples of each report available in the SAM 935 are included here with an explanation of their contents.7.1 A

58 SAM 935™ Instruction Manual7.3 Energy Calibration ReportThe energy calibration report is generated when a multi-line standard is measured to genera

SAM 935™ Instruction Manual 597.4 Manual MCA ReportThe MCA report is available only in Manual mode of operation, which is described in Section 5.4. MC

60 SAM 935™ Instruction Manual7.5 Database ReportsFrom the UTIL menu, it is possible to print a Database Report describing the status of one or all of

SAM 935™ Instruction Manual 618. SpecificationsPreamplifierType: Charge SensitiveInput: Negative Current (anode)Gain: -5 mV/pCAmplifierType: Pseudo-Ga

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SAM 935™ Instruction Manual 63Appendix A: AutoLoadWith any of the PGT Quantum™ products comes a copy of the AutoLoad spectrum retrieval program. This

64 SAM 935™ Instruction ManualFirst, you must select the device whose spectra you wish to retrieve. Do this by picking the name from the drop-down li

SAM 935™ Instruction Manual 65Device-Specific Notes for the SAM 935Each spectrum that is uploaded from the SAM 935 has a Spectrum ID, which is display

SAM 935™ Instruction Manual 31.2 Quick ReferenceOperating the SAM 935 is a simple 3-step process:1. Power on the SAM 935.2. If prompted to do so, take

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4 SAM 935™ Instruction Manual1. Press the ADJUST (F3) button.2. You will be prompted to place the Cs137 standard in front of the detector. Position th

SAM 935™ Instruction Manual 51.2.3 Take Samples and Review AlarmsThe monitoring display of the SAM 935 will look different depending on the operating