Sealey VS907 User manual

INFRARED LASER THERMOMETER 12:1
MODEL NO: VS907
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.
IMPORTANT: PLEASE READ THESE INSTRUCTIONS CAREFULLY. NOTE THE SAFE OPERATIONAL REQUIREMENTS, WARNINGS & 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. KEEP THESE INSTRUCTIONS SAFE FOR FUTURE USE.
1. SAFETY
1.1. GENERAL SAFETY
WARNING! Ensure that Health & Safety, local authority and general workshop practice regulations are adhered to when using this
equipment.
WARNING! 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.
9Familiarise yourself with the applications, limitations, and potential hazards of the thermometer.
9Keep the thermometer clean and in good condition.
9Protect the thermometer from the following:
Electro-magnetic fields from engine components, arc welders and induction heaters 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 take readings through transparent materials such as glass or clear plastic. The surface temperature of these materials will be
measured.
8DO NOT use the thermometer in areas where there is steam, dust or smoke. These conditions will result in erroneous readings.
8DO NOT use the thermometer for any purpose other than that 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.
1.2. LASER SAFETY
The VS907 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.
WARNING! DO NOT look or stare into the laser beam as permanent eye damage could result.
9Be aware that reflections of the laser beam from mirrors or other shiny surfaces can be as hazardous as direct eye exposure.
2. INTRODUCTION
High resolution laser thermometer that detects energy emission in the infrared spectrum and converts
reading into a display of temperature. Features laser pointer, Maximum/Minimum/Average/Difference
readings, data storage and data hold function, high/low alarm setup, auto power off. Temperature is
displayed on a large 29mm LCD panel with back-lit display for use in low light areas. Temperature can be
shown in either °C or °F. Powered by 9V cell (supplied). Storage case included.
3. SPECIFICATION
Temperature Range ..................................................... -50°C to +700°C (-58°F to +1292°F)
Accuracy(0°C to +550°C)...................................... +/-1.5°C or +/-1.5°C whchever is greater
(-50°C to 0°C) ............................................................................................................+/- 3°C
Response Time ...................................................................................................... 500mSec
Focal Range................................................................................................................... 12:1
Operating Temperature ..............................................................0°C to +40°C (+32°F to +104°F)
Storage Temperature ................................................................ -20°C to +60°C (-4°F to +140°F)
4. SET UP
4.1. INSTALLING/CHANGING BATTERY (FIG.2)
4.1.1. On either side of the trigger, where the handle moulding meets the 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.
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VS907 Issue 3 (HF) 05/10/18
Original Language Version
© Jack Sealey Limited
Refer to
instructions
Warning!
Laser Beam

4.1.2. 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.
4.1.3. When the ‘battery low’ indicator appears on the display replace the battery
immediately.
4.2. LCD DISPLAY (FIG.3)
A - Temperature Reading.
B - Temperature Unit of Measurement indicator
C - Laser On icon
D - Backlight On icon
E - Battery Status icon
F - Scanning icon
G - Data Hold icon
H - Mode/Emissivity indicator
I - Data Storage/Read icon
J - Low Temperature Alarm icon
K - High Temperature Alarm icon
L - Set/Record Value Indicator
4.3. BUTTONS AND CONTROLS (FIG.4)
1 - Trigger. Press to switch thermometer on. Press and hold to scan. The
Temperature Reading (fig.3.A) and the Scanning icon (fig.3.F) will show on
the LCD display. When the trigger is released, the last recorded Temperature
Reading (fig.3.A) and the Data Hold icon (fig.3.G) will show.
Note! The thermometer will automatically switch off when not used for
30 seconds.
2 - Laser/Backlight Button. Press to operate the laser and the
backlight. When the laser is on, the Laser On icon will show
(fig.3.C). When the backlight is on, the Backlight On icon will
show (fig.3.D). The backlight will only operate continually for 10
seconds.
3 - MODE Button. Press to navigate the mode menu. When the
required mode is reached, press the SET button (fig.4.4) to
enter.
MAX mode - will display the maximum temperature measured
on the Set/Record Value Indicator (fig.3.L) during a single scan.
MIN mode - will display the minimum temperature measured on
the Set/Record Value Indicator (fig.3.L) during a single scan.
DIF mode - will display the difference between the highest and
lowest measurements on the Set/Record Value Indicator
(fig.3.L) during a single scan when the SET button (fig.4.4) is
pressed.
AVE mode - will display the average reading measured on the
Set/Record Value Indicator (fig.3.L) during a single scan.
HAL - High Temperature Alarm. Use the arrow buttons (fig.4.5)
to set a high temperature alarm reading on the Set/Record
Value Indicator (fig.3.L) and enter using the SET button (fig.4.4).
When the pre-set temperature is exceeded during scanning,
HIGH will show on the LCD display (fig.3.K) and the audio
alarm will sound.
LAL - Low Temperature Alarm. Use the arrow buttons
(fig.4.5) to set a low temperature alarm reading on the Set/
Record Value Indicator (fig.3.L) and enter using the SET
button (fig.4.4). When the pre-set temperature is exceeded
during scanning, LOW will show on the LCD display (fig.3.J)
and the audio alarm will sound.
STO - Data Storage. Press the STO button (fig.4.6) and then
the SET button (fig.4.4), the data storage/read icon (Fig.3.I)
will show on the LCD display and 1--- will show in the Set/
Record Value Indicator (fig.3.L). To store the reading, press
the STO button (fig.4.6) and the Set/Record Value Indicator
(fig.3.L) will show 2---, ready for the next reading to be
stored. There are 12 groups available in the thermometer
memory. Data can be recalled in normal measuring mode by
pressing the STO button (fig.4.6). To clear the memory press
and hold the STO button (fig.4.6) for 3 seconds.
EMS - Emissivity set-up mode. Use the arrow buttons
(fig.4.5) to alter the emissivity setting displayed in the Set/
Record Value Indicator (fig.3.L). Press the SET button
(fig.4.4) to confirm selection. The default setting for EMS is
0.95.
4 - SET Button. This button is used to confirm mode
selection or any settings made.
5 - Arrow Buttons. These buttons are used to alter settings in the
HAL/LAL/EMS modes.
6 - STO Button. This button is used for various functions in the
data storage mode.
7 - Temperature Unit Switch. Located in the battery compartment
area in the handle, this switch converts between °C and °F.
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VS907 Issue 3 (HF) 05/10/18
Original Language Version
© Jack Sealey Limited

5. OPERATION
5.1. HOW THE UNIT FUNCTIONS
5.1.1. 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.
5.2. FIELD OF VIEW (FIG.5)
5.2.1. The units field of view is 12:1. This means that if the unit is positioned 300mm from the target the diameter of the object under test
must be at least 38mm. As a general rule make sure that the target is larger than 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.
5.3. EMISSIVITY
5.3.1. 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.
5.4. OBSTRUCTIONS
5.4.1. 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.
5.5. OPERATING THE THERMOMETER
5.5.1. Hold the meter by its handle grip and point it towards the surface to be measured.
5.5.2. Pull and hold the trigger (fig.4.1) to turn the meter on and begin measuring. The Scanning icon (fig.3.F) and the Temperature Reading
(fig.3.A) will show on the LCD display.
5.5.3. Whilst using the thermometer the following functions can be used:
a) Push the Laser/Backlight button (fig.4.2) to turn on the laser
pointer. When the laser is ‘on’ the Laser On icon (fig.3.C) will
appear on the LCD display. Aim the beam approximately 16mm
above the point of test. (To turn the pointer ‘off’ press the Laser/
Backlight button again.)
b) Select the temperature units using the Temperature Unit
Switch (fig.4.7).
c) Push the Laser/Backlight button (fig.4.2) to turn on the LCD
display backlight for a 10 second period.
5.5.4. Once the trigger has been released the information on the LCD
display will remain for 30 seconds before the unit automatically
switches off. (Whilst the information remains on the LCD display
the Data Hold icon (fig.3.G) will be displayed).
5.6. LOCATING A HOT SPOT (FIG.6)
5.6.1. 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.
6. APPLICATIONS
WARNING! 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.
6.1. AIR CONDITIONING
6.1.1. With the air conditioning set to maximum cooling, the temperature of the output air should be at least 15°C 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 15°C have the A/C system checked.
6.2. HEATER
6.2.1. 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 10°C 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.
6.3. RADIATOR
6.3.1. 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.
6.4. THERMOSTAT
6.4.1. Under normal operation the thermostat will open as the engine reaches operating temperature, releasing hot coolant into the hose linking
the thermostat housing to the radiator.
6.4.2. Use the thermometer to monitor the hose temperature, adjacent to the thermostat housing, as the engine warms up to operating
temperature (85°C-105°C).
6.4.3. If the hose temperature abruptly and quickly increases, the thermostat is functioning correctly.
6.4.4. If the temperature increases gradually and does not reach operating level, the thermostat has failed in the open condition (or is missing).
6.4.5. If the temperature does not rise at all the thermostat has failed in the closed condition or coolant is not flowing for some other reason (air
lock, pump failure etc.) and further investigation is required.
6.4.6. A fluctuating temperature indicates a weak thermostat spring or air in the system.
6.5. MISFIRING CYLINDER (FIG.7)
6.5.1. A misfiring cylinder (petrol or diesel) can be located by taking temperature readings of each branch of the exhaust manifold.
6.5.2. 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 heated the cool branch.
6.5.3. 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.).
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VS907 Issue 3 (HF) 05/10/18
Original Language Version
© Jack Sealey Limited

6.6. CATALYTIC CONVERTER
6.6.1. With the engine at normal operating temperature and running
at 1000rpm the inlet of the catalytic converter should be
cooler than the outlet by >55°C (2-way converter) or >20°C (3-
way converter).
6.6.2. If the outlet temperature is lower than the inlet then the converter
is ‘plugged’ and must be replaced.
6.6.3. 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.
6.6.4. Always determine the cause of failure, and rectify if appropriate,
before fitting a replacement.
6.7. BRAKES
6.7.1. 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.
6.7.2. Brakes on the same axle should not differ by more than 3°C
and front brakes should be hotter than rear brakes by about
30°C. 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.).
6.8. TYRES (FIG.8)
6.8.1. A correctly inflated tyre will have the same temperature across the
tread, within 10°C. To check, drive the car for a few miles and then
measure the tread in three places.
6.8.2. 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.
6.8.3. 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 the edge-of-tread temperatures which are significantly
different from each other indicate a suspension fault.
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Sealey Group, Kempson Way, Suffolk Business Park, Bury St Edmunds, Suffolk. IP32 7AR
01284 757500 01284 703534 [e-mail] www.sealey.co.uk
ENVIRONMENT PROTECTION
Recycle unwanted materials instead of disposing of them as waste. All tools, accessories and packaging should be sorted, taken to
a recycling centre and disposed of in a manner which is compatible with the environment. When the product becomes completely
unserviceable and requires disposal, drain any fluids (if applicable) into approved containers and dispose of the product and fluids
according to local regulations.
WEEE REGULATIONS
Dispose of this product at the end of its working life in compliance with the EU Directive on Waste Electrical and Electronic Equipment
(WEEE). When the product is no longer required, it must be disposed of in an environmentally protective way. Contact your local solid
waste authority for recycling information.
BATTERY REMOVAL SEE SECTION 4.1
Under the Waste Batteries and Accumulators Regulations 2009, Jack Sealey Ltd are required to inform potential purchasers of products
containing batteries (as defined within these regulations), that they are registered with Valpak’s registered compliance scheme. Jack
Sealey Ltd Batteries Producer Registration Number (BPRN) is BPRN00705.
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 this product.
Warranty: Guarantee is 12 months from purchase date, proof of which is required for any claim.
VS907 Issue 3 (HF) 05/10/18
Original Language Version
© Jack Sealey Limited