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ST365 Radiation Counter Technical Manual 

 

May 2020 – Revision 2.0

 

 

Spectrum Techniques, LLC 

www.spectrumtechniques.com 

Page 5 of 14

 

 

SPECIFICATIONS 

 

Power: 

9 volt DC, at 1200 mA* 

High Voltage: 

0 to +1200 volts @ 0.2 mA, selectable in 10 volt increments 

Inputs/Connectors:  BNC Connector – accepts standard GM detectors 

MHV Connector – accepts scintillation detectors 

Interface: 

USB 2.0 

LAN (for both PC and Mac) 
WiFi Direct for Android Device 

Model A Display: 

6-decade LED – 1 inch numerals 

Model B Display: 

16 character LCD – Backlight alpha numeric 

Modes: 

Counts 

Count Rate (Counts Per Second) 
Elapsed Time 

Preset Time 

High Voltage Level 

Software: 

Spectrum Techniques Ultra for PC 

Spectrum Techniques Ultra for Mac  
Spectrum Techniques Ultra for Android devices 

Housing: 

Plastic with metal front and rear panel 

Dimensions : 

7.6 x 22.9 x 17.3 cm (3 x 9 x 6.8 in.) (H x W x D)  

Weight: 

0.82 kg (1.8 lb) 

 

 
 
 
 
 

CAUTION 

 ONLY USE THE AC ADAPTER INCLUDED WITH THE ST365. USING A 

DIFFERENT ADAPTER CAN DAMAGE THE UNIT AND VOID THE 

WARRANTY. 

 

 
 

 

 

 

 

Содержание ST365

Страница 1: ...echniques ST365 RADIATION COUNTER TECHNICAL MANUAL SPECTRUM TECHNIQUES LLC 106 UNION VALLEY ROAD OAK RIDGE TN 37830 USA P 865 482 9937 F 865 483 0473 E SALES SPECTRUMTECHNIQUES COM W WWW SPECTRUMTECHN...

Страница 2: ...manufacture will be covered by the original manufacturers warranty usually one year from date of shipment This warranty excludes all GM tube windows which are extremely fragile These devices cannot be...

Страница 3: ...m Techniques LLC www spectrumtechniques com Page 3 of 14 TABLE OF CONTENTS INTRODUCTION 4 SPECIFICATIONS 5 DESCRIPTION OF CONTROLS FUNCTIONS AND INDICATORS 6 STAND ALONE OPERATION 7 BASIC GM SYSTEM SE...

Страница 4: ...omes in two models The ST365A with extra large LED s provide a digital display that is clear and visible even under bright ambient light or the ST365B with a back lit Liquid Crystal Display LCD which...

Страница 5: ...Fi Direct for Android Device Model A Display 6 decade LED 1 inch numerals Model B Display 16 character LCD Backlight alpha numeric Modes Counts Count Rate Counts Per Second Elapsed Time Preset Time Hi...

Страница 6: ...is detecting and counting events Power Button Pressing the POWER button toggles the instrument on and off An LED lights when the unit is powered HV ON OFF Button Pressing the HV ON OFF button toggles...

Страница 7: ...e RATE display mode Time Set and Display Mode TIME LED Preset time a parameter the user sets for the duration of counting Elapsed time the time since the start of counting On entering the TIME mode th...

Страница 8: ...Starting a count or pressing the STOP RESET button do not affect the high voltage setting Scintillation GM Mode Indicator SCINT LED When this LED is on the user can change the input detector type For...

Страница 9: ...t set the preset time to zero Step 6 COUNT A RADIOACTIVE SAMPLE Place a radioactive source close to the GM detector Press the OK button to start acquiring data To stop counting press the STOP RESET bu...

Страница 10: ...X axis being the high voltage volts and the Y axis being the counts counts Plot the data points and draw the curve The plotted data should resemble the graph below GEIGER PLATEAU CURVE Notice the ST3...

Страница 11: ...entally using two radioactive sources Since maintaining consistent counting geometry is important throughout the experiment Spectrum Techniques special split source Item ID RSS2 is available for makin...

Страница 12: ...Then use the LEFT and RIGHT arrow buttons to set the desired preset time for an indefinite count set the preset time to zero Step 6 COUNT A RADIOACTIVE SAMPLE Place a radioactive source close to the...

Страница 13: ...ive source Record the high voltage and total counts Reset the count increase the high voltage by 10 or 20 volts and perform the next count Repeat this process until the maximum high voltage is reached...

Страница 14: ...of 14 SODIUM IODIDE GAIN SWEEP CURVE USING SELECTED ISOTOPES Notice that at lower high voltages the ST365 will only count higher energy gammas Increasing the high voltage brings lower energy gammas ab...

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