Sealey VS900.V2 User manual

INSTRUCTIONS FOR:
INFRARED LASER THERMOMETER
Model: VS900.V2
Thank you for purchasing a Sealey product. Manufactured to a high standard this product will, if used according to these instructions
and properly maintained, give you years of trouble free performance.
VS900.V2 - 2 - 090304
IMPORTANT: PLEASE READ THESE INSTRUCTIONS CAREFULLY. NOTE THE SAFE OPERATIONAL REQUIREMENTS, WARNINGS AND CAUTIONS.
USE THE PRODUCT CORRECTLY AND WITH CARE FOR THE PURPOSE FOR WHICH IT IS INTENDED. FAILURE TO DO SO MAY CAUSE
DAMAGE AND/OR PERSONAL INJURY AND WILL INVALIDATE THE WARRANTY. PLEASE KEEP INSTRUCTIONS SAFE FOR FUTURE USE.
1. SAFETY INSTRUCTIONS
2. INTRODUCTION
1.1. GENERAL SAFETY
pWARNING! Ensure that Health & Safety, local authority and general workshop practice regulations are
adhered to when using this equipment.
pWARNING! DO NOT aim the laser beams at your or another persons or animals eye and beware of reflections
from mirrors or other shiny surfaces.
3Familiarise yourself with the applications, limitations, and potential hazards of the thermometer.
3Keep the thermometer clean and in good condition.
3Protect the thermometer from the following:
Electro-magnetic fields from engine components closer than 125mm.
Static electricity.
Thermal shock caused by large and/or rapid ambient temperature change.
High temperatures.
8DO NOT get the thermometer wet or use in damp or wet locations or areas where there is condensation.
8DO NOT use the thermometer for any purpose other than for which it is designed.
8DO NOT allow untrained persons (particularly children) to operate the thermometer.
8DO NOT operate the thermometer when you are tired or under the influence of alcohol, drugs or
intoxicating medication.
SPECIFICATION
Temperature Range ................................-50 to 280OC (-58 to 536OF)
Ambient Operating Range ............................0 to 50OC (32 to 122OF)
Response time ....................................................Less than 1 second
Accuracy @ 18OC to 28OC Ambient,
Target Temperature ..........................................................Accuracy
-50 to -20OC ..............................................................................±5OC
-20 to -280OC ............................................................±2% of reading
Over range indication ..............................................LCD will show 1
Emissivity ..................................................................0.95 fixed value
Laser ....................Output <1mW, Wavelength 630-670nm Class ll
Display ..........................................3-1/2 digit LCD with backlighting
Display Hold Time ................................................7 seconds approx.
Battery ....................................9V Alkaline or Ni-Cad (not supplied)
Weight ..............................................................................180grams
New way to tackle diagnosis of engine and vehicle faults. VS900.V2 detects energy emission in the infra-red spectrum and converts it
into a temperature reading. Features laser pointer to indicate area being sampled. Temperature is displayed on large LCD panel with backlit
display for use in low light areas. Temperature can be shown in either OC or OF
. Powered by 9V battery (not included).
MAIN FEATURES
1. Infrared sensor
2. Laser pointer beam
3. LCD Display
4. OF select key
5. OC select key
6. Laser select key
7. Backlight select key
8. Measurement trigger
9. Battery cover
10. Handle grip fig. 1
1.2 LASER SAFETY
The VS900.V2 utilises a Class II laser that emits low levels of visible radiation (i.e. wavelengths between 400 and 700 nanometres) which
are safe for the skin but not inherently safe for the eyes. The Class II emission limit is set at the maximum level for which eye protection is
normally afforded by natural aversion responses to bright light. Accidental eye exposure is therefore normally safe, although the natural
aversion response can be overridden by deliberately staring into the beam, and can also be influenced by the use of alcohol or drugs.
pWARNING! Do not look or stare into the laser beam as permanent eye damage could result.
7DO NOT direct the laser beam at any persons (or animals) eyes as eye damage could result.
8DO NOT operate the thermometer when you are tired or under the influence of alcohol, drugs or intoxicating medication.
3Be aware that reflections of the laser beam from mirrors or other shiny surfaces can be as hazardous as direct eye exposure.

4.1 How the unit functions.
The infrared thermometer measures the surface temperature of an object. The units optics sense emitted, reflected and transmitted
energy which is collected and focused onto a detector. The units electronics translate the information into a temperature reading
which appears on the LCD display. The laser is for aiming purposes only and plays no part in the temperature measurement.
4.2 Field of view.
The units field of view is 8:1. This means
that if the unit is positioned 8 (200mm)
from the target the diameter of the object
under test must be at least 1 (25mm).
Refer to the diagram opposite and to the
printed symbol on the side of the unit. As
a general rule make sure that the target is
larger that the relevant spot size. The
smaller the spot size the closer you should
be to the target. When accuracy is critical,
make sure that the target is twice as large
as the spot size.
4.3. Locating a hot spot. To find a hot spot
aim the thermometer outside the area of interest, then scan across with an up and down motion until you locate a hot spot.
4.4. Emissivity. Different materials and surfaces have different energy emitting characteristics (emissivity) but most organic materials and
painted or oxidised surfaces are similar in this respect and the thermometer is designed to give correct readings for these materials
and surfaces (Emissivity 0.95). To maintain accurate measurement, shiny or polished metal surfaces should be covered in masking tape or
matt black paint before using the thermometer. Allow time for the tape/paint to attain the same temperature as the material beneath.
4.5. Obstructions. The thermometer cannot read the temperature of a target through glass or plastic sheet. It will only show the surface
temperature of the sheet. Similarly, steam, dust or smoke will result in erroneous readings.
4.6. OPERATING THE THERMOMETER
4.6.1 Hold the meter by its handle grip and point it towards the surface to be measured.
4.6.2 Pull and hold the trigger to turn the meter on and begin measuring. The display will come on and the SCAN display icon will appear
in the top left hand corner of the LCD display.
4.6.3 While continuing to hold the trigger in the on position the following facilities can be used,
a) Push the red button to turn on the laser pointer. When the laser is on the triangular laser icon will appear on the LCD display over
the temperature reading. Aim the red beam approximately 16mm (5/8) above the point of test. (To turn the pointer off press the red
button again.)
b) Select the temperature units using the CO& FObuttons.
c) Push the backlight button to turn on the LCD backlight.
4.6.4 Once the trigger has been released the information on the LCD will remain for 7 seconds before the unit automatically powers down.
( Whilst the information remains on the display the HOLD icon will be displayed.)
5. APPLICATIONS
4. OPERATION
pWARNING! When working on vehicle systems, take all the precautions necessary to ensure the safety of yourself and others - always
refer to vehicle manufacturers handbook/service manual. The purpose of this tool dictates that it will be used close to very hot equipment
and therefore extreme care should be exercised.
5.1. Air Conditioning
With the air conditioning set to maximum cooling, the temperature of the output air should be at least 15OC colder than the outside
ambient once the system has stabilised. Do not place the thermometer directly in the cold air stream (thermal shock) but rather hold it
to one side and take the temperature of the air duct. If the air temperature differential is less than 15OC have the A/C system checked.
5.2. Heater
With the engine running, and at normal operating temperature, A/C off and heater controls on measure the temperatures of the
heater inlet and outlet hoses/pipes at the engine compartment bulkhead. The outlet hose/pipe should be approximately 10OC cooler than
the inlet. If the differential is significantly more than this the flow through the heater core is restricted and the system should be investigated.
VS900.V2 - 2 - 090304
fig. 3
3. SET UP
3.1 Installing/changing the battery
3.1.1 On either side of the red trigger, where the light grey handle moulding meets the the dark grey
main body there are two very shallow recesses. Place thumb and finger into these recesses
and pull the front section of the handle forward and down to reveal the battery compartment as
shown in fig.2.
3.1.2 Attach the battery connector to the battery terminals and place the battery into the battery
compartment making sure that the connection leads will not foul the cover when it is closed.
3.1.3 When the battery low indicator appears on the display replace the battery immediately.
DISPLAY INFORMATION
1. Digital readout
2. Temperature OC (Celcius)
3. Temperature OF (Fahrenheit)
4. Measuring indicator (scanning)
5. Data hold indicator
6. Low battery indicator
7. Laser on indicator
8. Fixed emissivity (0.95)
fig. 2

5.6. Catalytic Converter
With the engine at normal operating temperature and running at 1000rpm the inlet of the catalytic converter should be cooler than the
outlet by >55OC (2-way converter) or >20OC (3-way converter).
1) If the outlet temperature is lower than the inlet then the converter is plugged and must be replace.
2) If the outlet temperature is the same as the inlet then the converter has reached the end of its service life (say 150,000 miles) or
the converter material has broken up due to damage or has become contaminated.
Always determine the cause of failure, and rectify if appropriate, before fitting a replacement.
5.7. Brakes
The thermometer can be used to check comparative brake performance. The brakes should be
brought up to operating temperature, by braking the vehicle from 30mph to a halt five times in
quick succession, and the brake disc/drum temperatures then measured immediately. Brakes on
the same axle should not differ by more than 3OC and front brakes should be hotter than rear
brakes by about 30OC. In the case of temperatures not meeting these criteria further investigation
will be required - noting that it is normally the cooler brake which is faulty (seized, contaminated, etc.).
5.8. Tyres
A correctly inflated tyre will have the same temperature across the tread, within 10OC. To check,
drive the car for a few miles and then measure the tread in three places as shown in fig. 5.
If the readings from the sides of the tread are higher than that from the centre the tyre is probably
under-inflated.conversely over-inflation causes the centre to be hotter than the edges. In either case, adjust the tyre pressure in 2psi
steps until even temperatures are achieved. If the resulting pressure is significantly different from that recommended by the
vehicle/tyre manufacturer look for another cause of the temperature difference (worn, damaged or misaligned suspension). Note that
edge-of-tread temperatures which are significantly different from each other indicate a suspension fault.
fig. 5
Declaration of Conformity We, the sole importer into the UK, declare that the product listed here
is in conformity with the following standards and directives.
The construction file for this product is held by the Manufacturer and may be inspected, by a national
authority, upon request to Jack Sealey Ltd.
For Jack Sealey Ltd. Sole importer into the UK of Sealey Professional Tools.
10th March 2004
INFRARED LASER THERMOMETER
Model: VS900.V2
EN 60825-1 Laser safety
93/68/EEC CE Marking Directive Signed by Mark Sweetman
6. DECLARATION OF CONFORMITY
NOTE: It is our policy to continually improve products and as such we reserve the right to alter data, specifications and component parts without prior notice.
IMPORTANT: No liability is accepted for incorrect use of product.
WARRANTY: Guarantee is 12 months from purchase date, proof of which will be required for any claim.
INFORMATION: For a copy of our latest catalogue and promotions call us on 01284 757525 and leave your full name and address, including postcode.
VS900.V2 - 2 - 090304
Sole UK Distributor,
Sealey Group,
Bury St. Edmunds, Suffolk.
01284 757500 01284 703534 [e-mail] www.sealey.co.uk
e-mail Web
5.3. Radiator
When the engine is running at normal operating temperature, there should be an even temperature drop between the radiator inlet and
outlet. Check the whole radiator surface for any cold spots which would indicate a blockage.
5.4. Thermostat
Under normal operation the thermostat will will open as the engine reaches operating temperature, releasing hot coolant into the hose
linking the thermostat housing to the radiator.
Use the thermometer to monitor the hose temperature, adjacent to the thermostat housing, as the engine warms up to
operating temperature (85-105OC).
1) If the hose temperature abruptly and quickly increases the thermostat is functioning correctly.
2) If the temperature increases gradually and does not reach operating level the thermostat
has failed in the open condition (or is missing).
3) If the temperature does not rise at all the thermostat as failed in the closed condition
or coolant is not flowing for some other reason (air lock, pump failure etc.) and
further investigation is required.
4) A fluctuating temperature indicates a weak thermostat spring or air in the system.
5.5. Misfiring Cylinder
A misfiring cylinder (petrol or diesel) can be located by taking temperature readings
of each branch of the exhaust manifold (fig. 4). The cool branch will indicate the misfiring
cylinder. The temperature difference will be most marked before the engine has
warmed up and heat transfer has warmed the cool branch. One exhaust branch
hotter than the rest (petrol) suggests weak mixture to that cylinder, which should
be investigated (faulty injector, inlet manifold gasket leak, etc.).
fig. 4