MDE-4567D 9820K Series AST Pumps Installation and Operation Manual · January 2020
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Battery Backup Power Supply
9820K Setup and Special Features
Battery Backup Power Supply
Until summer of 2012, a battery-backed power supply was an option for all the 9800 models
including the 9820K. This option was required for units used in a retail application. If power
was lost to the unit, the battery allowed the last transaction amount to remain on the display to
meet W&M requirements. The current 9800 series displays are backed up by a super cap that
performs this function at the display.
View/Reset Totalizer
Electronic Totalizer
The 9820K stores a running quantity total. This electronic totalizer works independent of the
optional mechanical totalizer that may be installed at the pump module, and is shown as whole
gallons (liters) on the displays (decimal point is shown, although it is disregarded). The
totalizer data is stored in battery-backed memory. The 9820K is supplied with an actuator
(see
), which allows you to view and reset the electronic totalizer. When the 9820K
is shipped, the actuator is attached with a tie wrap to the electronic chassis behind the register
door. At installation or startup, cut the tie wrap and remove the actuator. Retain for future use.
Figure 6-5: Electronic Totalizer
To view the pump totalizer, ensure that the pump handle is off and no transaction is in
progress. Locate the unit of measure indication (for example, gallons) below the display
window. Touch this area with the actuator as shown. The totalizer data will be displayed for 10
seconds. If more time is needed, touch the actuator to the same area for an additional 10-
second period.