Fluke Biomedical 8000 Victoreen - Manual (Page 31)

Operation
Modes of Operation
2
2-19
24.8
kVp Avg
226.5
msec
24.3
kV Eff
240.3
mR
27.3
kV Peak
19.9
mAs
MAMMO HIGH MOLY Mo 30μ MAKE
MODE SENS TARGET FILTER EXPOSURE
After data analysis is complete, kV, exposure, time and mAs are displayed. If an overrange is detected
an error message is displayed. If the calculated kV is above or below the selected filter kV range, “High”
or “Low” is displayed instead of kV and measured time may be “----“ (see Section 4.3--Error Messages--
for more information). Please wait while the NERO mAx prepares for the next exposure. If the NERO
mAx detects a fault condition such as an invalid filter card or position, an error message is displayed and
the user must correct the error to continue (see Section 4.3--Error Messages--for more information).
The NERO mAx is now ready to take another exposure. Pressing the mode key at any time exits from
this measurement mode and returns to the mode selection screen.
24.8
kVp Avg
226.5
msec
24.3
kV Eff
240.3
mR
27.3
kV Peak
19.9
mAs
MAMMO HIGH MOLY Mo 30μ Please
MODE SENS TARGET FILTER Wait…
As a power saving feature, the NERO mAx’s display backlight turns off after one minute of no activity.
The backlight turns back on when any button is pressed or an exposure is made. In addition, after five
minutes of no activity, the NERO mAx exits from any measurement mode and returns to the mode
selection screen.
Using A Measurement Delay
A measurement delay may be used to postpone the start of data acquisition in order to skip over
waveform anomalies (such as overshoots) that may occur at the beginning of an exposure. The delay
range is from -999 to +999 milliseconds, and the polarity of the measurement delay only affects how
exposure time measurements are performed.
When the measurement delay is positive, the NERO mAx includes the delay time in its measured
exposure time. A positive measurement delay should be used in cases when the kV waveform contains
leading edge overshoot or other waveform anomalies that should be excluded from kV measurements but
included in the exposure time measurement.
When a negative measurement delay is specified, the NERO mAx does not include the delay time in the
measured exposure time. A negative measurement delay should be used in cases when x-ray generator
filament preheat pulses or other waveform anomalies should be excluded from kV and exposure time
measurements.
More information on using a measurement delay may be found in “Using a Measurement Delay” at the
end of Section 2.5.1--Radio Mode.