Fluke Biomedical 199XRAY - Manual (Page 15)

Using the X-RAY kVp Function
kVp Scope Mode
2
2-7
kVp Scope Mode
When entering the kVp Scope mode predefined scope
settings for the selected filter pack are provided. Some of
these settings are fixed, some can be manually adjusted.
See kVp Scope Mode Presets on page 2-12.
There are two different measurement modes in the kVp
Scope Mode, the RADIO mode for measuring single
radiographic exposures and the FLUORO mode for
measuring continuous or pulsed fluoroscopic exposures.
Radiographic Mode (RADIO)
When used in the Radiographic mode, the 199XRAY waits
for a trigger then stores the entire kV waveform. When the
radiographic exposure is complete, kVp-avg, kV-peak, and
exposure time in ms or pulses displayed (the kV waveform
must also meet the Automatic kVp Mode requirements).
The instrument is then ready for another exposure.
Note:
The most recent 100 screens are always stored
in the replay buffer. To view stored screens,
press the REPLAY button and use the F1, F2,
and F3 keys. To start a new measurement, press
F4, EXIT REPLAY. For more information, please
see the 190B/C Users Manual.
Fluoro Mode (FLUORO)
When used in the Fluoro mode, the 199XRAY waits for a
trigger then samples the kV waveform at one sample per
second. For each sample, kVp-avg and kV-peak are
measured (each sample must also meet the Automatic
kVp Mode requirements). Each sample is stored in the
instrument’s replay buffer and up to 100 samples can be
stored. When the fluoro exposure stops or if the replay
buffer fills, the Replay Menu is displayed and each sample
may be displayed using the F1, F2, and F3 keys. To start
a new measurement, press F4, EXIT REPLAY.
kV Measurements
kVp average is the average value of the kV peaks within
the measurement area and is indicated by the tick marks
on the vertical cursors.
kV Peak is the highest kV value within the measurement
area.
In radiographic (RADIO) mode, the kV measurement area
is the central 80% of the kV waveform; the first and last
10% of the waveform are excluded from these
measurements.
In fluoroscopic (FLUORO) mode, kV is measured over the
complete waveform sample.