MDE-4363G Atlas™ Fuel Systems Owner’s Manual · August 2018
Page 3-21
CPU Switch Settings (Series 9800 Only Including DEF 9862 Units)
The Atlas Fuel System
Pulser Output Rate Switches
When the Series 9800 is connected to external control equipment other than a Gasboy CFN,
Gasboy TopKAT top-mount or Gasboy TopKAT electronic (standalone), the pulser signals are
sent out via the 9800 Pump I/F PCB. The pulse rate required by the monitoring equipment can
be configured by setting the switches as shown in the following chart. The pulse rate
represents pulses per gallon (PPG for US Gallons and Imperial Gallons) or pulses per liter
(PPL, most international). For US Gallons or Imperial Gallons configurations, the pulse rate
can be up to 100 PPG for the 9850 and 500 PPG for all others models. For liters
configurations, the pulse rate can be up to 10 PPL for the 9840 and 9850, and 100 PPL for all
other models. For Imperial Gallons configurations, the pulse rate can be 100 PPG for the 9850
and 500 PPG for all other models. This switch must be sealed by a Weights and Measures
paper seal if the Series 9800 unit is used for the resale of product.
Leading zeroes are always suppressed in the hundreds and tens positions to the left of the
decimal point. When in standalone mode, positions to the right of the decimal point are
displayed based on the pulse rate selected as shown in the following table.
Time-out Switch
When the Series 9800 is in standalone mode, it will turn off an active hose if it does not detect
pulses for four minutes, 15 seconds. This time-out feature can be disabled by setting switch
SW2-4 to OPEN.
Pulse Rate
SW2-1
SW2-2
SW2-3
1
Closed
Closed
Closed
10
Open
Closed
Closed
100
Closed
Open
Closed
250
Open
Open
Closed
500
Closed
Closed
Open
None
Closed
Open
Open
None
Open
Open
Open
Note: For the last two switch settings, no pulse will be sent to
the Fuel Management System.
Pulse Rate
9800/9840 Display Layout
9850 Display Layout
1:1
XXX.
XXXX.
10:1
XXX.X
XXXX.X
100:1
XXX.XX
XXXX.XX
250:1
XXX.XXX
XXXX.XX
500:1
XXX.XXX
XXXX.XX
Timeout
SW2-4
Enabled
Closed
Disabled
Open