Fluke Biomedical 8000 Victoreen - Manual (Page 26)

Victoreen 8000
Operators Manual
2-14
79.2
kV Eff
392
mR
81.1
kV Peak
0.0
mAs
RADIO 75% LOW 10 ms Please
MODE %kV SENS DELAY Wait…
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 "----". If the NERO mAx cannot find the
selected %kV on the kV waveform, a %kV TOO LOW message is displayed (see Section 4.3--Error
Messages--for more information). Please wait while the Model 8000 prepares for the next exposure. If
the Model 8000 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).
80.0
kVp Avg
100
msec
79.2
kV Eff
392
mR
81.1
kV Peak
0.0
mAs
RADIO 75% LOW 10 ms MAKE
MODE %kV SENS DELAY EXPOSURE
The Model 8000 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.
As a power saving feature, the Model 8000'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 8000 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 or preheat effects) that may occur at the beginning of an
exposure.
When a delay is used, the NERO mAx waits for the specified delay time after its radiation threshold is
exceeded before starting data acquisition. Data acquisition starts immediately after the delay time has
elapsed if radiation is above the NERO mAx radiation threshold. If no radiation is detected after the delay
time has elapsed, data acquisition is delayed for up to one second after the delay time has elapsed. If no
radiation is detected for one second after the delay time has elapsed, the NERO mAx assumes that no
exposure has occurred and displays the “DELAY TOO LONG” message.
The delay range is from -999 to +999 milliseconds, and the polarity of the measurement delay only affects
how exposure time measurements are performed.