Fluke Biomedical 199XRAY - Manual (Page 17)

Using the X-RAY kVp Function
kVp Scope Mode
2
2-9
Auto kVp Mode Waveform Requirements
For automatic measurement of kV in the Fluoroscopic
measurement mode, the waveform must be onscreen and
must meet the following criteria:
• The kV being measured must be within the range of the
chosen filter pack and must be above the trigger level
for the filter pack and sensitivity setting (See Tables 2-1
and 2-2).
• The vertical height of the entire waveform must be
greater than 2.5 divisions above the zero level
• No portion of the waveform may be off the top of the
screen
For automatic measurement of kV and exposure time in
the radiographic measurement mode, the entire waveform
must be onscreen and must meet the following criteria:
• The kV being measured must be within the range of the
chosen filter pack and must be above the trigger level
for the filter pack and sensitivity setting (See Tables 2-1
and 2-2).
• The vertical height of the entire waveform must be
greater than 2.5 divisions above the zero level
• No portions of the waveform may be offscreen
• The last falling edge of the waveform must be greater
than 3.5 divisions horizontally from the rising edge
(trigger position).
• The last falling edge of the waveform must be less than
9 divisions from the rising edge (trigger position). This
leaves the last horizontal division with a signal at zero
level, which verifies that the current acquisition contains
the complete signal.