Main-Menu Functions - Radcal Accu Series User Manual

Main–Menu Functions
indicate default functions. Using Setup you can add or remove functions to customize the main
Italics
menu. A flow chart representation of the main menu is shown on the enclosed diagram.
Setup
Provides access to configuration settings. See Setup–Menu Functions on page 19.
Dose Rate
Measures and displays dose rate. Performs an auto-zero and measures environmental conditions when
the mode is first selected. Applies that value to each reading. Measurement interval depends on dose
rate and varies between 0.3 and 5 seconds. An arrow in the upper left corner is on when a measurement
is in process. It points upward when low sensitivity mode is selected, and to the right the for high
sensitivity.
Max Dose Rate
Measures Dose rate. Displays the result only if the measured rate is greater than that displayed. select
resets the stored value.
Dose Accum/Hold
Measures total dose. Performs an auto-zero and measures environmental conditions when mode is first
selected and applies those values to the measurements. A down-pointing arrow in the upper left of the
display appears when accumulated zero-corrected dose is negative; up- and right-pointing arrows
indicate measurements in normal and high-sensitivity modes respectively. Updates the display once per
second.
Pressing select resets the accumulation but not the zero.
Auto Dose
Automatically measures the dose and duration of a single exposure. Displays the result until another
exposure occurs. Starts when the dose rate exceeds 0.01% FS; stops accumulating dose 200 ms after
the rate falls below 0.006% FS. Duration is measured between the trigger point and 50% of the peak rate.
The ending delay allows collection of all the charge in the exposure.
Last Dose
Like Dose Accum/Hold except select doesn't reset the dose accumulator. The accumulator is updated
every 500 ms.
Pulsed Cine
Accumulates dose and displays it in units of dose per pulse or dose rate. Use Setup to define 6
measurement conditions, each of which specifies pulse rate (pulses/s), delay(pulses) , acquisition(pulses)
and threshold(varies with chamber). Available pulse rates include automatic (indicated as 0 pulses /s)
that works up to approximately 16 pulses/s and selected values between 0.25 and 90 pulses/s. The x-ray
machine must be operating during the entire time of the measurement.
kV Pulse
Measures and displays kVp and duration. If a dose sensor is connected measures and displays pulse
dose and dose rate. If the mA sensor is connected integrates mA to obtain mAs. Displays mA or mAs.
kVp measurements are calculated using a 100ms interval near the end of the pulse. Analyzes kV
waveforms up to 5 sec. Use select to access filtration and additional dose measurements. See page 12
for a description of the display options. See Display discussion on page 12 for the meaning of special
characters A, D and M (in filtration) and C and K (in dose).
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