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Additional info for Troubleshooting in Nuclear Instruments (IAEA TECDOC-426)

Example text

By means of a t h e r m o c o u p l e sensor located in the soldering iron next to the (36) Chapter 3 -17- the a c t u a l t e m p e r a t u r e and bit, the electronic control measures an compares it to the nominal t e m p e r a t u r e s e t t i n g . By means of full-wave logic and Triac, the i n t e g r a t e d zero v o l t a g e swit ch w i t h t e m p e r a t u r e is elee t ronical1 y c o n t r o l l e d and the operational state Depending on the temperature is i n d i c a t e d by a pilot 1 ight.

2 . 6 Oscilloscope Probes Modular s w i t c h a b l e p r o b e w i t h xl and xlO a t t é n u a t i o n AH. 10:1 B a n d w i d t h : DC-250 MHZ rise time: 1,4 nsec input resistance: 10 Mohm AH. 1:1 B a n d w i d t h : DC-10 MHZ rise time: 35 nsec input resistance: 1 Mohm Modular probes allow easy repair of broken p a r t s ; any m o d u l e can be s i m p l y r e p l a c e d . 7 ABC Oscilloscope Current Probe Sensitivity Accuracy : ImV/mA ± 3% Bandwidth : I k H z to rise t irae: 8 nsec 40 MHz 1I10B I max.

Check voltages of HV and LV. 7. Are all signal cables alright? Check the presence of signals at the output or preamplifier, the input and output of the amplifier, the input and output of the SCA and at the input of the sealer. g. the pin in a male BNC may be moving backwards when connected to the socket. 8. Are the cables connected to correct inputs and outputs? A. 5 THE COUNT RATE IS LOWER THAN USUAL Possible reasons: 1. There is no radioactive source in the measuring position, or a wrong source, a wrong patient or sample, a patient wrongly injected.

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Troubleshooting in Nuclear Instruments (IAEA TECDOC-426)


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