Dynalyzer – High Voltage Unit
OPERATION MANUAL
1
Contents
Preface .................................................................................................................................................................. 2
Safety Notice ..................................................................................................................................................... 2
Introduction .......................................................................................................................................................... 3
General .............................................................................................................................................................. 3
Basic Principle of Operation .............................................................................................................................. 3
Anode Current Sensor .................................................................................................................................. 3
High-Voltage Divider ..................................................................................................................................... 3
Filament Current ........................................................................................................................................... 3
Equipment Supplied .......................................................................................................................................... 4
Specifications .................................................................................................................................................... 4
Installation ............................................................................................................................................................ 8
Inspection .......................................................................................................................................................... 8
Parts Necessary for Use ................................................................................................................................... 8
Electrical Connections ....................................................................................................................................... 9
Precautions ................................................................................................................................................... 9
High Voltage Cable Connections .................................................................................................................. 9
Operation ............................................................................................................................................................ 13
Readout Oscilloscope ..................................................................................................................................... 14
Measurement procedure for kVp and Exposure Time Using Oscilloscope ................................................ 14
Measurement Procedures for mA and mAs using Oscilloscope ................................................................ 15
Three-Phase Current Measurements (using Oscilloscope) ........................................................................ 15
Fluoroscopic Current Measurements (using Oscilloscope) ........................................................................ 16
Measurements with Digital Display ................................................................................................................. 16
Current Measurements with Dynalyzer III Digital Display (mA and mAs) ................................................... 16
Exposure Duration (Time) ........................................................................................................................... 17
Dynalyzer Digital Display of kVp Measurements ........................................................................................ 17
Filament Current Measurement with the Dynalyzer Digital Display ............................................................ 17
Measurements with Suitable RMS Voltmeter .................................................................................................. 17
Removing High Voltage Unit from X-ray Installation ....................................................................................... 18
Interpreting Oscilloscope Measurement Waveforms ...................................................................................... 18
Single-Phase Current Waveform ................................................................................................................ 18
Three-Phase Current Waveforms ............................................................................................................... 19
kVp Calibration for X-Ray Generator .......................................................................................................... 20
Equipment Fault Diagnosis by Voltage Waveform Analysis ....................................................................... 20
Evaluating Fluoroscopic Current Measurements ........................................................................................ 21
Single-Phase Radiographic Current Measurements using Oscilloscope ................................................... 22
Filament Current Measurements using Oscilloscope ................................................................................. 24
How to Select Operating Voltage .................................................................................................................... 27
Maintenance ....................................................................................................................................................... 27
System Pressure ............................................................................................................................................. 28
Failure Modes .................................................................................................................................................. 28
