Fluke Biomedical 10100AT - Manual (Page 21)

Operation
Front Panel Familiarization
2
2-3
Detector Select
This button causes display of the identity of the ion chamber and kVp filter pack last used. This button
also has the toggle function to cursor select which chamber and/or filter pack is to be currently used. If
different, changes may then be made by means of the UP and DOWN buttons. The filter pack selection
is used only when a Model 35080/80A/80B kVp Divider is connected.
Reset/Measure
This button is used to both begin and reset the measurement process. When the Exposure Reset option
is set to Manual, indicated by in the upper right corner, this button may be depressed between
exposures to clear the display. When the Exposure Reset option is set to Automatic, this is not required
because of the automatic reset feature of the Model 35050AT Dosimeter. The manual reset feature is
only active in the Full-Sensitivity Exposure mode.
2.2.2 Display
The display, located on the upper left-hand corner of the front panel, is a two line, twenty character per
line, alphanumeric PLED (polymer light emitting diode) display module. This module performs all visual
indications for the manual operator.
Annunciators
The battery/supply level and ion chamber bias potential are measured regularly by the instrument in a
background mode. Should either level go outside of preset limits, an annunciator is displayed. The
preset limits are given below.
Bias voltage limits 300 to 325 volts
Power battery limits 5.9 to 9.6 volts
The low battery limit of 5.9 V has been chosen to provide approximately two hours of useful battery life
following the initial display of the low battery annunciator.
The battery voltage is measured at the input of the
5-volt regulator, after some drops in fuse, switch,
wiring, etc. There will be a discrepancy of several
tenths of a volt from the actual battery voltage.
2.3 Connector Familiarization
There are four external connectors provided on the Model 35050AT Dosimeter case sides. On the side
left of the front panel (front view) are the ion chamber and kVp divider connectors (marked by a yellow
ring). The following paragraphs detail the purpose and use of these connectors. On the side right of the
front panel are the DC power jack and the RS-232 connector. Information on RS-232 communication is
in the Model 35050A Programmer's Instruction Manual that is available upon request.
NOTE