Fluke Biomedical 10100AT - Manual (Page 20)

10100AT
Operators Manual
2-2
2.2.1 Control Buttons
All front panel control buttons are momentary contact switches, but their functions are firmware latched
once depressed for even a short period of time. They are membrane type switches that provide a definite
tactile indication of operation.
Power On/Off
This button controls the power to the instrument. Depressing this button for approximately one second
turns the power on. Depressing and releasing the button a second time turns the power off.
When the power-up screens sequence is still in
progress, depressing any button will have no effect.
Similarly, depressing any button during the power-
down sequence will have no effect.
In the event of no button depression, no exposure, no operating kVp divider connected, or no RS-232
communication for a user-defined period; the instrument will automatically save its current settings and
turn its power off. Note that any measurement values displayed at power down will be lost. For
additional details on power-up screens, see section 2.4.
At next power-up, the unit will resume operation with these same selections. In addition, at power-up, the
unit will automatically advance through four basic status or self-test screens and then automatically
invoke the DETECTOR SELECT screen before returning control to the front panel buttons. This screen is
shown in Figure 2-1.
Options
This button is used to select various measurement options and display of a series of test screens. For
additional details on test screens, see section 2.5. The complete wraparound list may be examined by
repeatedly pressing the Options button.
Air Density
This button causes display of the temperature and barometric pressure used for vented ion chamber
corrections. When the temperature & pressure mode is set to Automatic Sense, pressing the Air Density
button causes the ambient temperature and pressure to be displayed. When the temperature & pressure
mode is set to Manual Entry, the button has a toggle function: momentarily depressing it selects whether
temperature or barometric pressure may be adjusted. The current variable is indicated by the “greater
than” symbol (>) as first character in the display line; hereafter, this is referred to as the cursor. The
current variable may then be changed in value, if desired, by use of the UP and DOWN buttons. Air
density corrections to the exposure and exposure rate displays will be made only if 1) radiological units
(not A or C) have been selected, and 2) an ion chamber with air density corrections enabled has been
selected. When air density corrections are in effect, an “ADC” annunciator will be displayed on the
measurement screen. In the event that the temperature/pressure sensor becomes non functional, an
error message, “Temp & Press Error Use Manual Entry” is displayed and only the manual temperature
and pressure entry mode is available.
Units Select
This button causes display of the selected radiological or electrical units and cine frames per second.
This button also has the toggle function to cursor select the units or frame rate for changing. Changes
may then be made by means of the UP and DOWN buttons. The exposure and exposure rate displays
will be affected by the frame rate setting only if units of exposure per frame (R/frame, Sv/frame, etc.) have
been selected.
NOTE