Omitec OM4720 User Manual
OmiScan Gas
Operating Instructions
Part Number - I317719
US
Issue 1
© Omitec 2008
Part Number - I317719
US - Issue 1
© Omitec 2008
Contents
Introduction
Introduction............................................................................................. 5
Power Management ............................................................................... 7
Safety Precautions ................................................................................. 7
Electrical Safety Precautions .................................................................. 7
Assembling the OmiScan Gas Analyzer................................................. 8
Safe Removal and Disposal of Batteries ................................................ 9
OmiScan Gas Sample Probe ............................................................... 10
Getting Started
Emissions Testing ................................................................................ 11
Handset Navigation .............................................................................. 11
Gas Analyzer ........................................................................................ 12
Simulated Tests.................................................................................... 23
System Checks..................................................................................... 35
PC/USB Mode ...................................................................................... 37
Settings................................................................................................. 37
Low Battery Indication .......................................................................... 43
Out of Range ........................................................................................ 44
PC Gas Analyzer Software
System requirements............................................................................ 46
Installation ............................................................................................ 46
Using the Software ............................................................................... 46
Analyzer Software Functions ................................................................ 47
Communications................................................................................... 68
Software Build ...................................................................................... 68
Gas Analysis
OmiScan Gas Analysis of Results ........................................................ 69
iii
Contents
Routine Maintenance & Cleaning
Routine Maintenance............................................................................ 74
NOx Cell Replacement ......................................................................... 76
Calibration and Accuracy Checks......................................................... 77
Cleaning ............................................................................................... 77
Technical Specification
Technical Specification......................................................................... 78
General Data ........................................................................................ 80
Ancillary Equipment.............................................................................. 81
Pneumatic Specifications ..................................................................... 81
Service and calibration frequency ........................................................ 82
Country Specific Approvals .................................................................. 82
Spare Parts List .................................................................................... 84
iv
Introduction
Introduction
Introduction
OmiScan Gas is an exhaust gas analyzer for spark ignition vehicles and comprises a
fully portable handset with a base station and optional software to install on a PC.
2
5
7
8
1
4
9
6
3
OM1375
1. Handset
2. Base unit
3. Exhaust Probe attachment
4. Base unit exhaust pipe extension
5. Mains power converter supply
6. CD ROM with PC software
7. Vehicle power supply cable (optional)
8. USB cable handset to laptop
9. Filters
Spark ignition vehicles includes both catalyst and non-catalyst, supercharged
(including Turbo) and lean-burn engines, vehicles that are fuelled by Petrol, Liquid
Petroleum Gas (LPG) and Compressed Natural Gas (CNG) and also injection or
carburettor fuel control.
NOTE: Diesel engined vehicles are specifically excluded from testing using the
OmiScan Gas system.
5
Introduction
There are two options available:
1. OM4720/5G
• Measures 5 gases, provides live readings of all gases and λ
• PC software to graph and/or diagnose emissions faults from gas readings
2. OM4720/4G
• Measures 4 gases, provides live readings of all gases and λ
• PC software to graph gas readings
The OmiScan Gas system enables the measurement of four or five of the main
exhaust gases emitted from a spark ignition engine. The gases measured are:
Carbon Dioxide (CO2), Carbon Monoxide (CO), Hydrocarbons (HC), Oxygen (O2) and
Nitric Oxide (NOx) (optional). Measurement accuracy meets or exceeds requirements
for OIML Class 0 and BAR97:
• CO:Range - 0% to 15%; accuracy typically 3% relative
• CO
: Range - 0% to 20%; accuracy typically 3% relative
2
• O2: Range 0% to 25%; accuracy typically 1% relative
• HC n-hexane: 0 to 2000ppm; accuracy typically 3%
• HC n-propane: 0 to 30000ppm; accuracy typically 5%
• NOx :Range - 0 to 5000ppm, accuracy typically 3% relative (optional)
The optional PC based system provides enhanced facilities for data capture and
graphing as an additional feature.
The OmiScan Gas handset communicates with the base station using Bluetooth
Wireless Technology and with the PC option, the handset communicates with a PC
via a USB port.
®
6
Introduction
Power Management
The handset monitors both itself and the base station for the charge status of the
battery packs. If either battery pack voltage falls below a predetermined level the
handset will display a warning to cease testing and recharge the units. Approximately
five minutes before the batteries reach the automatic shutdown point, a message is
flagged to warn you of the low battery state and thus the imminent shutdown.
1. Low Base Station Battery
• Indicated by the handset battery symbol flashing ‘empty’ and the green LED
on the base station flashing
2. Low Handset Battery
• Indicated only by the battery symbol on handset display flashing empty.
NOTE: Once the units have been put on charge, both LED and battery symbol will
stop flashing.
Safety Precautions
WARNING: Exhaust gases are poisonous and contain carbon monoxide,
which can cause unconsciousness and can be fatal - NEVER start or leave
the test vehicle engine running in an unventilated area.
WARNING: DO NOT handle the OmiScan Gas exhaust probe tip, or place
the exhaust probe on plastic or combustible surfaces after the test
procedure. The probe may become extremely hot during the test and could
cause burns and a risk of fire.
Electrical Safety Precautions
WARNING: Any power or extension cord must have a ground conductor.
WARNING: When replacing fuses make sure the correct type and rating
are used.
WARNING: Any adjustment, maintenance or repair must be carried out by
an approved service engineer.
7
Introduction
Assembling the OmiScan Gas Analyzer
Unpack the units carefully, checking off each item and component against the
itemized packaging list included. If any component is missing or damaged, contact
your supplier immediately.
• The batteries in the base unit and the handset will need to be installed and charged
before either unit can be used (see ‘Power Management’, page 7).
• The base station battery compartment is on the underside of the unit, secured by
two cross-headed bolts. Unscrew the cover, and secure the bigger battery pack
into the cover tray with the velcro strap; connect the in-line connector to the base
station. Refit the cover and tighten the two screws (do not over tighten).
• Remove the handset rubber protection cover to access the underside of the case
cover; remove the four cross-headed screws and place to one side. Lift off the
bottom cover and place to one side. Connect the smaller of the battery packs to
the in-line connector and place the battery pack in the recess through the PCB;
taking care to keep the supply cables from catching the cover. Position the cover
and replace the four screws (do not over tighten). Refit rubber protection cover.
• Place the handset in the base station ensuring that it is pushed firmly into place
and clips into the bottom securing clip.
IMPORTANT: BATTERY PACKS SHOULD ALWAYS BE FITTED BEFORE THE
CHARGER UNIT IS CONNECTED.
• Connect the mains charging unit into the round connector at the rear of the base
station and the mains plug into a wall socket. With the mains switched on, the
middle red LED on the top surface of the base station should illuminate to indicate
that the base station is charging. The handset display will switch ON automatically
and the battery symbol in the top right hand corner will indicate progressive
charging.
• If applicable, while the batteries are charging, install the Analyzer software onto
your PC (see ‘Installation’, page 46).
• When fully charged the red base station LED will extinguish and the lower amber
LED will illuminate to indicate the base station battery is on trickle charge until the
charging unit is disconnected. Likewise, the battery symbol on the handset will
remain static showing a fully charged battery, which will be on trickle charge until
mains charging unit is disconnected.
8
Introduction
CAUTION: Before connecting the base station to the mains, ensure that
you have read and fully understand the operating instructions given in
this document.
• Attach the exhaust sample probe to the water trap fitting (2) at the rear of the base
station.
• Attach the exhaust outlet pipe to the Exhaust Gas outlet (4). The exhaust outlet
pipe is used to expel the sampled exhaust gases from the test vehicle well away
from the active working area, to prevent technicians inadvertently inhaling the
gases. Run the outlet pipe to a well ventilated area.
Safe Removal and Disposal of Batteries
Both the Base station and the handset use rechargeable
Nickel Metal Hydride battery packs. The expected working
life for each pack should be in excess of 18 months. Both
packs are consumable spare parts and are designed to be
replaced by the user. See ‘Assembling the OmiScan Gas
Analyzer’, page 8 to see how to access the batteries.
Ni-MH
CAUTION: Ensure both Handset and Base station are
powered OFF and disconnected from charger Power
supply BEFORE replacing battery packs!
LI-ION
The Handset also contains a Lithium button cell for time and
date back up. This battery’s life expectancy is in excess of
5 years. This battery should not be replaced by the user.
This should be carried out by an Omitec Inc. authorized
Service Agent.
CAUTION: DO NOT DISPOSE OF BATTERIES IN
HOUSEHOLD REFUGE. SOME COMMUNITIES OFFER
RECYCLING OR THE COLLECTION OF USED
BATTERIES. CONTACT YOUR LOCAL GOVERNMENT
FOR DISPOSAL PRACTICES IN YOUR AREA.
9
Introduction
OmiScan Gas Sample Probe
WARNING: Before attaching any OmiScan Gas probe to the test vehicle,
ensure that you have read and understand the safety precautions listed
earlier in this manual.
Exhaust probe
The exhaust probe collects gas samples from the test vehicle exhaust, which are then
analyzed by OmiScan Gas.
The probe connects between the Sample Gas Input fitting (item 2 under ‘Assembling
the OmiScan Gas Analyzer’, page 8) and the test vehicle exhaust pipe. Insert the
probe as far into the vehicle exhaust as possible and secure by attaching the alligator
clip to the end of the exhaust pipe.
WARNING: Take care to avoid contact with the exhaust system when
inserting or removing the exhaust probe. The exhaust system will be hot
and severe burns could occur.
The exhaust probe is supplied with a sealing cap (Part No. OM 4700/23) which must
be fitted over the end of the probe when a leak test is performed. Keep the cap in a
safe place when not in use (see ‘System Checks’, page 35, for further details of a leak
test).
10
Getting Started
Getting Started
Emissions Testing
Before attempting to test vehicle emissions levels, ensure that the base station and
handset are fully charged (see ‘Power Management’, page 7) for remote operation.
For on-road testing if the base station batteries are low, connect the base station to
the vehicle supply cable (optional). With this configuration the batteries will not charge
but the supply to the base station is maintained.
OmiScan Gas emissions testing can be undertaken by using the handset separated
from, or in position on, the base station.
Handset Navigation
Press the ‘Power up’ buttons on the base station and then on the handset, the
handset screen displays the ‘Main Menu’ and lists the functions available:
• Gas Analyzer
• PC/USB Mode
• Settings
• Language
MAIN MENU
Gas Analyzer
PC/USB Mode
Settings
Lang, Idioma
The handset will automatically start searching for the Bluetooth
®
Wireless
Technology address specific to the base station. The handset and the base station
are ‘paired’ together to prevent any interference or acquisition from other Bluetooth
Wireless Technology devices such as laptop PCs or mobile telephones. After a few
seconds an antenna icon will appear in the top LH corner of the screen indicating that
the Bluetooth
®
Wireless Technology link has been established. This icon will always
be displayed whilst the link is made.
The battery icon in the top RH corner reflects the charge status of the handset battery
pack.
NOTE: The battery icon will flash empty to indicate a low battery charge for either the
handset or the base station - see ‘Power Management’, page 7.
The Main Menu has four options:
• Gas Analyzer - Emission testing and analyzer system checks
• PC/USB Mode - Used for down loading test result and updating handset
11
®
Getting Started
• Settings - Results record, clock and general system settings
• Language - Allows the user to configure handset in English, French or Spanish
Gas Analyzer
MAIN MENU
Gas Analyzer
PC/USB Mode
Settings
Lang, Idioma
To access Emission Menu press the button with the pointing at Gas Analyzer.
REMOVE THE PROBE
Ensure the exhaust
probe is in clean
air
-OK
Follow the instructions and press the button.
ANALYZER SETUP
Please wait. . . . .
The handset will display ‘Analyzer SetUp - Please Wait’ and a progress bar. On
completion the progress bar will be replaced briefly by ‘Passed’.
During this time the analyzer is initializing settings ready to conduct emissions testing.
Once completed the display screen will change back to the ‘Main Menu’.
The handset has an automatic power saving facility, if no action is taken after one
minute the display backlight powers down. Pressing any button will turn the backlight
back on. If the handset does not detect a button press for more than 15 minutes it will
assume that the OmiScan Gas is not in use and the Base Station and the Handset
will automatically power down.
NOTE: The automatic shutdown feature is disabled during ‘Live Reading’ test.
12
Getting Started
Manual Power Down
To power down both Handset and Base station at the same time, simply press and
hold power button on handset for >1 second.
Live Readings
GAS ANALYZER
Live Readings
Simulated Tests
System Checks
Press the again to enter the ‘Gas Analyzer’ menu and again to start ‘Live
Readings’.
SAME VEHICLE?
FORD
OU54XYZ***
2006 Gasoline
-Repeat X-Restart
The screen momentarily displays ‘Live Readings’, then ‘Please wait’ then asks the
technician to ‘Repeat’ or ‘Restart’ a test, displaying the vehicle data from the last
test: Manufacturer, Licence plate, year and fuel type.
NOTE: When using for the first time, there will not be any previous tests stored,
therefore the handset will proceed directly to the series of screen reminders before
starting a test.
For ‘Repeat’ see page 18, ‘Restart’ sequence follows.
SELECT FUEL TYPE
Gasoline
USA Reformulated
LPG
CNG
Other fuels offered are:
• Ethanol E85
• Methanol M85
13
Getting Started
• Gasohol E10
• Gasohol E20
Pressing Restart will display a screen asking for fuel type.
LIVE READINGS
Remaining Memory:
56Mins 40secs
-OK X-Cancel
The remaining memory will be shown. On pressing -OK the series of screens and
procedures will be displayed.
LIVE READINGS
Ensure oil and
coolant levels OK
-Continue X-Abort
A series of screen reminders are displayed: ‘Ensure oil and coolant levels OK’, press
to continue, or press to abort’.
LIVE READINGS
Ensure brake on and
in neutral/park
-Continue X-Abort
‘Ensure brake on and in neutral/park, press to continue, or press to abort’.
LIVE READINGS
Ensure engine is
running and up to
temp.
-Continue X-Abort
14
Getting Started
‘Ensure engine is running and up to temp., press to continue, or press to abort’.
HC HANGUP
Ensure the exhaust
probe is in clean
air
-OK
‘HC HANGUP Ensure the exhaust probe is in clean air, press to continue.
HC HANGUP
HC residue check
Please wait . . . .
Limit: 20ppm HC: 00
9 secs X-Abort
X
HC HANGUP’ ‘HC residue check’, ‘Please wait’, Lim: 20ppm HC: XX’, ‘XXsecs’, press
- to abort. On completion of the countdown the screen will briefly display ‘HC
residue check passed.’
ZERO CALIBRATION
Please wait . . .
The base station will automatically carry out a ZERO CALIBRATION, on completion
the progress bar will be replaced briefly by ‘Passed’.
INSERT PROBE
Exhaust probe check.
Please wait . . . .
-Continue X-Abort
X
On completion there is a prompt to ‘INSERT PROBE’.
15
Getting Started
LIVE READINGS
Display All.
2 Gas Display
1 Gas Display
Exit Test
X
As soon as gas is sensed there is a request for the number of gases to display, all,
two or one and also an ‘Exit Test’.
If ‘1 Gas Display’ or ‘2 Gas Display’ is selected, an additional menu will be displayed
listing the gases or outputs that can be displayed, which are CO, HC, O
Lambda, NOx, Air Fuel Ratio (AFR) and corrected CO (COK).
To make a selection, scroll up or down and press . In ‘2 Gas Display’ option, the
selection will be tagged with an arrow. To deselect press again. Once the second
gas has been selected, the handset will exit the menu and display the selected gases.
LIVE READINGS
HC: 0 λ: 0.00
CO: 0.001% CO2: 0.00%
O2: 21.02% NOx: 0ppm
-Start X-Go back X
, CO2,
2
On selection the screen will display the gas and the gas level in % or ppm, as
appropriate.
LIVE READINGS
HC: 0 λ: 0.00
CO: 0.001% CO2: 0.00%
O2: 21.02% NOx: 0ppm
-Stop -Mark X-Go back X
There is no fixed time for this test, however, there is a prompt to ‘Start’ and ‘Stop’
using the button. When sampling, a ‘Mark’ can be made at a specific point in the
test by pressing the button. This will set a marker in the data that is displayed in
the analyzer data graph on the PC.
16
Getting Started
TEST RESULTS 1
Live Readings
Time: 09:11
Date: Feb 20 08
-Save X-Erase X
When stop is pressed the screen displays ‘Test Result XX’ ‘Live Readings’ ‘Time:
XX:XX’ ‘Date: XX/XX/XX’ press to save, or press to erase.
SELECT MAKE
Not recorded
ACURA
ALFA ROMERO
ASTON MARTIN
If saving, the next screen displays ‘SELECT MAKE’ and makes of vehicles can be
scrolled using the and buttons. Press to select the make.
LIVE READINGS
Enter Vehicle Year
200X
-OK X-Cancel - Move
The next screen displays ‘ENTER VEHICLE YEAR’, 200X (model year) and the
and buttons will scroll through the years, press to select the year, the bottom
line, i.e. -OK -Cancel -Move will flash until is pressed to confirm.
17
Getting Started
LIVE READINGS
Vehicle License No:
**********
----------
-OK X-Cancel - Move
The next screen displays ‘LIVE READINGS’ ‘Vehicle License No:’ ‘XXXXXXXXXX’.
The and buttons will set each character from A to Z and 0 to 9, when the first
character is correct press the camera button. Move to the next character and
repeat the procedure until the registration number has been added press . The
bottom line, i.e. -OK -Cancel -Move will flash until is pressed again to
confirm.
SELECT TYPE
Not recorded
Sedan
Coupe
Convertible
Next screen displays ‘SELECT TYPE’ and a list of vehicle type, eg. Hatchback,
Sedan, Station wagon, Convertible, Coupe and 4x4.
TESTER NAME
Not recorded
TESTER 1
TESTER 2
TESTER 3
TESTER 4
The next screen displays ‘TESTER NAME’ and a list of stored testers, a default list
shows ‘Tester 1’, ‘Tester 2’ etc.
LIVE READINGS
Remaining Memory:
61Mins 43secs
-OK X-Cancel
On selection of the tester the remaining memory is displayed.
18
Getting Started
REMOVE THE PROBE
Please Wait. . .
-OK X-Cancel
Pressing the -OK will start a ‘System Purge’ procedure to remove any residual
exhaust gases in the probe and pipework.
SYSTEM PURGE
Please wait . . .
X-Cancel
X
On completion of the ‘System Purge’ the display will return to the Gas Analyzer menu.
If pressing ‘Repeat’ the following sequence will occur:
LIVE READINGS
Remaining Memory:
61Mins 43secs
-OK X-Cancel
Pressing will display ‘Remaining memory: XXMins XXsecs’ -OK, -Cancel. If
there is insufficient time available to complete another test the handset will need to
have the existing files deleted (see ‘Settings’, page 37). For ‘Restart’ see page 13.
NOTE: If you have the PC option, make sure that any tests you wish to keep/analyze
are down loaded to the PC before deleting the files.
19
Getting Started
LIVE READINGS
Ensure oil and
coolant levels OK
-Continue X-Abort
A series of screen reminders are displayed: ‘Ensure oil and coolant levels OK’, press
to continue, or press to abort’.
LIVE READINGS
Ensure brake on and
in neutral/park
-Continue X-Abort
‘Ensure brake on and in neutral/park, press to continue, or press to abort’.
LIVE READINGS
Ensure engine is
running and up to
temp.
-Continue X-Abort
‘Ensure engine is running and up to temp., press to continue, or press to abort’.
HC HANGUP
Ensure the exhaust
probe is in clean
air
-OK
‘HC HANGUP Ensure the exhaust probe is in clean air, press to continue.
20
Getting Started
HC HANGUP
HC residue check
Please wait . . . .
Limit: 20ppm HC: 00
9 secs X-Abort
X
HC HANGUP’ ‘HC residue check’, ‘Please wait’, Limit: 20ppm HC: XX’, ‘XXsecs’,
press - to abort. On completion the screen will briefly display ‘HC residue check
passed.’
ZERO CALIBRATION
Please wait . . .
The base station will automatically carry out a ZERO CALIBRATION, on completion
the progress bar will be replaced briefly by ‘Passed’.
INSERT PROBE
Exhaust probe check.
Please wait . . . .
-Continue X-Abort
X
On completion there is a prompt to ‘INSERT PROBE’.
LIVE READINGS
Display All.
2 Gas Display
1 Gas Display
Exit Test
X
As soon as a gas is sensed there is a request for the number of gases to display, all,
two or one and also an ‘Exit Test’.
21
Getting Started
If ‘1 Gas Display’ or ‘2 Gas Display’ is selected, an additional menu will be displayed
listing the gases and outputs that can be displayed, which are CO, HC, O
Lambda, NOx, Air Fuel Ratio (AFR) and corrected CO (COK).
To make a selection, scroll up or down and press . In ‘2 Gas Display’ option, the
selection will be tagged with an arrow. To deselect press again. Once the second
gas has been selected, the handset will exit the menu and display the selected gases.
LIVE READINGS
HC: 0 λ: 0.00
CO: 0.001% CO2: 0.00%
O2: 21.02% NOx: 0ppm
-Start X-Go back X
On selection the screen will display the gas and the gas level in % or ppm, as
appropriate.
LIVE READINGS
HC: 0 λ: 0.00
CO: 0.001% CO2: 0.00%
O2: 21.02% NOx: 0ppm
-Stop -Mark X-Go back X
, CO2,
2
There is no fixed time for this test, however, there is a prompt to ‘Start’ and ‘Stop’
using the button. When sampling, a ‘Mark’ can be made at a specific point in the
test by pressing the button. This will set a marker in the data that is displayed in
the analyzer data graph on the PC.
TEST RESULTS 1
Live Readings
Time: 09:11
Date: Feb 20 08
-Save X-Erase X
When stop is pressed the screen displays ‘Test Result XX’ ‘Live Readings’ ‘Time:
XX:XX’ ‘Date: XX/XX/XX’ press to save, or press to erase.
22
Getting Started
LIVE READINGS
Remaining Memory:
56Mins 40secs
-OK X-Cancel
Pressing -Save will store the results and the screen will change to live readings
available memory. Pressing -OK will display the Gas Analyzer menu, after the
‘remove probe’ and system purge’ screens.
Simulated Tests
GAS ANALYZER
Live Readings
Simulated Tests
System Checks
Simulated tests has three test procedures:
• CAT
• TSI
• ASM
SIMULATED TESTS
CAT
TSI
ASM
Note: The 4 Gas version of OmiScan Gas only offers TSI as NOx is not fitted. CAT
and ASM require NOx readings.
23
Getting Started
CAT
In this test all five gases HC, CO, CO2, NOx and O2 are analyzed to gauge the
performance of a Catalytic convertor. The test will report that the Catalytic convertor
is good, suspect or if the gas readings suggest there may be another fault which may
not be related to the Catalytic convertor (only available for 5-gas option).
CAT
Please Wait. . . .
SELECT FUEL TYPE
Gasoline
USA Reformulated
LPG
CNG
Selecting petrol will start a sequence of screens, remaining memory, oil and coolant
levels, hand brake and engine running and up to temperature. HC Hangup sequence
will be started ending with a Zero Calibration and a prompt to insert probe into the
exhaust pipe. The process will continue with fast idle.
CAT
Run engine between
2500 - 3000 RPM
-OK X-Abort
Open the throttle to increase engine speed to within the indicated RPM range.
24
Getting Started
CAT
Preconditioning
5 secs
X-Abort
X
A short preconditioning before continuing the fast idle test.
CAT
Fast Idle Test
30 secs
X-Abort
X
If the gas level is within the limits the test will be complete and a report of ‘Within
Limits’ will be displayed.
CAT
Outside Limits
X = Quit
= Extended test
or X
If the test fails an extended test can be started.
CAT TEST
Additional
conditioning
Fas t I dl e test ?
-Continue X-Abort
or X
The additioning conditioning comprises an extended period at fast idle to ensure that
the catalyzer is at the correct temperature to start and maintain the catalytic reaction.
25
Getting Started
CAT
Run engine betweeen
2500-3000 RPM
-OK X-Abort
The vehicle engine speed must be set to within the range indicated.
CAT
Fast Idle Test
180 secs
X-Abort
X
If the cat fails again a results page is displayed.
NON-CAT FAULT
CO = -0.00%, HC = 0ppm
O2 = 20.97%, CO2 = 0.00%
NOx = 0ppm
-OK
The test results can be saved or erased as required.
26
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