Table of Contents
Advertisement
Electronics
8
Power supplies
Power supplies
Low voltage (ac-dc) power supply
The low voltage power supply is mounted next to the toroid transformer in the
electronics module. A universal input power supply, it converts ac line voltage into
the dc voltages used by the rest of the electronics. The power supply generates
the following dc voltages:
• +24 V (nominal)
• +15 V (nominal)
• -15 V (nominal)
• +5 V (nominal)
High voltage (HED) power supply
The high voltage power supply provides the -10,000 volts dc for the high energy
dynode (HED) in the detector. The HED power supply also provides the 350 volts
dc for the detector focus lens. Due to the high impedance of this circuit, it is not
practical to measure the detector focus voltage with a handheld voltmeter.
243
Advertisement
Table of Contents
