Fluke Biomedical 07-494 - Manual (Page 21)

4
Operation
Interpreting Front Panel Warning Indications
4-3
NOTE
For displayed values greater than 95 kVp a flashing
decimal point above the C/D on the front panel may
be impossible to avoid for any combination of mA
or distances. The sensitivity of the kVp Meter above
95 kVp increases such that the mAs requirements
become very low at short distances. More filtration
can be added to the X-ray beam with the sacrifice
of accuracy. Filtration effects are discussed in more
detail in Section 3, Theory and Applications.
A flashing decimal point the C/D on the front panel with a displayed value equal to 00.0 indicates that the
minimum mAs requirements have not been met. Increase either the time or the mA setting or decrease
distance to obtain the required results.
4.3 Viewing the Waveform Output
The BNC connector on the rear panel provides a signal from the unfiltered radiation detection diodes in
the kVp Meter. During the x-ray exposure, a voltage is present at the BNC connector and available for
display on an oscilloscope. Examination of the waveform will require photographing it on a conventional
oscilloscope or using a storage oscilloscope.