Compac CNG User Manual

Dispenser Software Upgrade/Replacement
Servicing
Compac Industries Ltd.
Page 64
www.compacngv.com
Dispenser Software Upgrade/Replacement
You can only upgrade the dispenser software by replacing the EPROM chip.
Follow this software upgrade procedure for all CNG Dispensers that use the
C4000 Microprocessor.
Before working on the dispenser electronics, take basic anti-
static precautions by wearing a wristband with an earth strap.
Record Set-up Data and Tote
Information
1. Access the C4000 Microprocessor PCB by opening the front panel.
2. Record all the set-up data by accessing the Parameter switch (SW1)
and the K-Factor switch (SW2). Refer to Parameter Switch Settings (see
page 19) and K-Factor Switch Settings (see page 25) to obtain this
information.
The following data is required from the Parameter switch (SW1):
 Dispenser pump price (see page 21).
 Dispenser pump number (see page 23).
 Dispenser sequencing rate.
 Software Program number (see page 20), if you are upgrading to a
new version.
The following data is required from the K-Factor switch (SW2):
 The K-Factor (see page 27). There is a value for side A and side B
in dual hose dispensers.
 The temperature (see page 29).
 The Set Resolution (see page 33). This sets the number of decimal
places after the decimal point.
 The pressure values. ( Record if applicable: u uA uA2 ub
ub2 )
 The pressure gain. (Record if applicable: GAin GAinA 9Ainb
GAinA2 GAinb2 )
 Configuration Code C (see page 35).
 Configuration Code b (see page 34).
 The Density Factor (see page 27).
3. Record the tote information by pressing the nozzle switch or start button
quickly five times
Remove the software EPROM
1. Turn off the dispenser.
2. Remove the software EPROM chip, using an EPROM extractor.
Install new software EPROM
1. Plug in the new software EPROM, checking that all of the legs are
correctly located in the socket. The chip should be located as far to the
bottom of the socket as possible. This leaves a gap of two pins from the
top of the chip to the top of the socket. Pin 1 of the EPROM is then
located in the top left corner (pin 3 of the socket).
2. Turn on the dispenser.
3. Check that the initial set-up data and tote information is the same.
If the initial set-up data is different, re-enter this information, as per
Parameter Switch Settings (see page 19) and K-Factor Switch Settings
(see page 25).
4. Check the dispenser operation Checking Dispenser Operation (see page
42)

Compac CNG Specifications

General

Brand	Compac
Model	CNG
Category	Dispenser
Language	English