SECTION V
5.0 OPERATION
5.1 FAMILIARIZATION WITH OPERATING CONTROLS AND FEATURES LOCATED
ON THE TAPE REEL HUB COVER PANEL:
5.1.1 Turn on power by momentarily depressing the “Off/On” push-button switch
(1) located at left of panel. The display should read 1XX.X* indicating that the
system is in the Ullage/Interface mode.
5.1.2 Looking at the top left hand corner of the LCD display notice if the symbol
“Lo Bat” appears. If the symbol is displayed, the battery voltage is low and the
battery should be replaced (see Section VII Paragraph 7.5). Always replace the
battery if “LO BAT” appears even though the digital display turns on. Temperature
readings with a low voltage battery (below 7.0 Volts) are unreliable.
5.1.3 Once again, momentarily depress the power “On/Off” switch. Note that the
display turns off. Always turn power off when the system is not in use to prolong
battery life.
Depress the “Off/On” switch once more. Display turns on and reads
1XX.X* indicating the Ullage/Interface mode.
*NOTE: Due to an inherent digital uncertainty of the A to D converter, some
digital displays, whenever in the Ullage/Interface mode, will read 00.0
instead of 1XX.XX.
5.1.4 Now momentarily depress the “Mode” switch at the right of the panel.
The display should now switch to the temperature mode as indicated by a reading on
on the display indicative of the temperature of the sensor tip.
Once again depress the “Mode” switch and note that the display reads
1XX.X* (Ullage/Interface Mode). Depressing the “Mode” switch alternately
changes the function from temperature to Ullage/Interface and vice versa.
Depressing the power “Off/On” switch alternately turns power off or on regardless
of which mode was in operation. However, when power is switched on again the
system will always come on in the Ullage/Interface mode.
5.1.5 Depress the night light switch (3) at upper center of panel when it is too
dark to see the display. The display background will illuminate and the reading
should now be discernible.
5.2 ULLAGE/INTERFACE MEASUREMENTS:
5.2.1 If power is off, depress power “Off/On” push-button switch. The system
comes on in Ullage/Interface mode (display reads 1XX.X).
5.2.2 If the power was on and the system is in temperature mode, depress the
“Mode” switch at right of panel to alter function to Ullage/Interface
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