Compac CNG User Manual

Dispenser Operation
Reading the Dispenser Totals
Compac Industries Ltd.
Page 39
www.compacngv.com
Temperature Compensated Refuelling Process
The technical operation of a temperature compensated dispenser is
as follows:
1. Press the start button or remove the nozzle from the holster to
initiate a fill.
The display will show 888888 and then clear, at this point both
the gas and value totals will display 0.00
2. Connect the refuelling nozzle to the vehicle
3. The refuelling valve is opened and when flow is detected the
solenoids shut immediately. Pressure reading (P1) and amount
dispensed (KG1) are recorded.
4. The compensated fill pressure is calculated. If the vehicle is
within 20 bar of this pressure, no filling takes place.
5. The solenoids are opened and filling continues as follows:
 If P1 was less than 50 bar, the fill will continue for 20
seconds.
 If P1 was greater than 50 bar but less than 100 bar, the fill
will continue for 14 seconds.
 If P1 was greater than 100 bar but less than 150 bar, the fill
will continue for 10 seconds.
 If P1 was greater than 150 bar but less than 180 bar, the fill
will continue for six seconds.
6. The solenoids shut and pressure reading (P2) and amount
dispensed (KG2) are recorded.
7. The amount of gas (KGf1) to completely fill the vehicle to Pf is
calculated as follows:
KGf1 = (KG2 – KG1) x (Pf – P1) / (P2 – P1).
8. The dispenser fills to KGf1 and stops. This is the end of the fill.
Reading the Dispenser Totals
To read the dispenser totals:
1. Quickly press the Start button or nozzle switch five times on the
side of the dispenser you wish to view the totals for. The total is 10
digits long. The four most significant digits are displayed on the top
line and the number wraps to the second line showing the six least
significant digits.
The dispensed amount will be shown on the display for 10 seconds.
This will be shown as:
d Followed by a 10 digit Total
The dispensed quantity will then be shown next and will be
displayed for 10 seconds. This will be shown as:
L Followed by a 10 digit Total
From software version HIA29.25.3CNG onwards the
decimal place has been removed from the tote. There will two digits on
the top ($) display and six digits on the lower (kg) display
For dual dispensers, the A or B side will be indicated in
the unit price display.

Compac CNG Specifications

General

Brand	Compac
Model	CNG
Category	Dispenser
Language	English