Warning – Gasboy Atlas Start-up User Manual
Page 156
Page 6-36
MDE-4334D Atlas™ Start-up and Service Manual · July 2013
Hydraulic/Mechanical Components
Meters
Figure 6-20: Components of Coriolis Meter
Electronics Module
(M10006B501)
Meter Programming Chip
• As meters are very sensitive to air in the fluid, the air can cause a pulser error code or
erratic calibration results at fast and slow flow. If the calibration for the meter is erratic,
then check the above ground pumping units. Ensure that the pump is not producing
excessive air due to inlet leaks in the pump. If the meter freezes, then check the calibration
of the meter. If there is a large difference between the fast and slow flow values, then the
meter is permanently damaged.
Note: Presence of air changes the fluid density and mass flow rate.
• The meters can be permanently damaged by freezing. Usually the symptom is repeatable
tests at high flow rate, with a large change in calibration resulting at slow flow rate. That
is, meter linearity error is high.
• When purging the air from the meter during installation, temporarily connect a standard
Atlas pulser to the CPU, as the meter is sensitive to air. When dispensing DEF, spin the
pulser manually until all the air is purged from the system. If this is not done, an error code
may be generated by the dispenser. Ensure that you turn off the dispenser before
disconnecting the output between the Coriolis Meter Interface Board and CPU when
connecting or disconnecting the temporary pulser and Coriolis Meter Interface Board.
Do not substitute the pulser while power is being supplied to the unit. Lethal voltages exist
within the dispenser and damage to the unit could occur if certain critical steps are not
followed. It is recommended that only Gilbarco-certified ASCs, who are trained in the
service and operation of Atlas dispensers perform this procedure.
WARNING
WARNING
The meter is electronically calibrated similar to standard meters. There is no change to this
procedure. For additional information, refer to
“Coriolis Meter Interface Board
.