RaySafe Xi User Manual
Page 16
2. MEASURE MODE
the displayed values are updated after each exposure.
kV
kV (Mo/Mo, optional: Mo/rh, w/rh, w/al and w/al scanning)
Dose
Gy (air kerma, free in air) or r (exposure)
Dose rate
Gy or r per s, m or h
Time
ms, s
HVL
mm al
mAs
mas (requires raysafe Xi base unit with mas)
mA
ma (requires raysafe Xi base unit with mas)
3. SETUP MENU
press SELECT to enter the SETUP MENU (from MEASURE MODE) and STEP to step between setup
parameters.
all values are stored in a non-volatile memory and are valid until manually changed. at start up (after the
battery status information), valid trig delay, kVp delay and Calc. delay are displayed in sequence.
(factory settings in bold.)
Trig delay
a delay in ms after the normal trig of the raysafe Xi. utilize when an unwanted part
of an exposure, such as a pre-pulse, should be excluded from the measurement. no
measurements are performed during the trig delay. (0, 5, 10, 50, 100, 200, 500, 1000,
2000 ms)
Trig level
use trig level to measure correct exposure time on waveforms with slowly increasing
output, such as with single phase dental. the default setting is a low value, that depends
on the selected sensor; see specifications. Can be set to 25, 50 or 75 % of the peak
value of the previous exposure. use it with the same generator settings and fdd. not
selectable before the first exposure or at low dose rates.
kVp delay
defined as the delay in ms, after the trig delay, but before the radiation and kV waveform
window (in the raysafe Xi view) begins. (0, 2, 5, 10, 50, 150, 300, 1000, 1200, 1500, 1700,
2000 ms)
Calc. delay
defined as the dead time after end trig, before data is calculated. default is 0.5 s but it
is recommended to use 2 s when measuring on generators with a pre-pulse.
(0.5, 2, 4, 6, 7s)
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raysafe Xi user Manual – Mammography Measurement