Sealey VS940 User manual

INSTRUCTIONS FOR
TWIN LASER INFRARED
DIGITAL THERMOMETERS 12:1
MODEL NO’S: VS940, VS941
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
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 conditons 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.
1.1. Laser Safety
The VS940 and VS941 utilise 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inuencedby
the use of alcohol or drugs.
WARNING! Do not look or stare into the laser beam as permanent eye damage could result.
Be aware that reflections of the laser beam from mirrors or other shiny surfaces can be as hazardous as direct eye exposure.
2. iINTRODUCTION
Detects energy in the infrared spectrum and displays the temperature on an 18mm LCD back-lit display. Twin spot laser targeting enables
accurate readings by guiding user to the unit’s optimum guiding distance - when the two laser dots merge into one, unit is reading a 13mm disc
of temperature. Features data hold and auto power off. Temperature can be shown in either °C or °F. Powered by 9V battery (supplied).
3. SPECIFICATION
Model no: ................................................................... VS940
Focal ratio: ...................................................................... 12:1
Temperature range:....... -50°C to +650°C (-58°F to +1202°F)
Accuracy: .......................... ±2°C or ±2% whichever is greater
Model no: ................................................................... VS941
Focal ratio: ...................................................................... 12:1
Temperature range:.... -50°C to +1050°C (-58°F to + 1922°F)
Accuracy: .......................... ±2°C or ±2% whichever is greater
VS941, VS941 | Issue 1 25/10/16
Original Language Version
© Jack Sealey Limited
Refer
To instructions
Warning:
Laser beam

4. OPERATION
Refer to g.1
1. Dual laser targeting.
2. LCD display.
3. Function menu.
4. Measuring trigger.
5. Battery cover.
4.1.  Theobjecttobemeasuredmustbelargerthanthevisioneldoftheinstrument.
4.2. Keep the object’s surface clean and free from frost, oil and dirt etc. when measuring.
4.3.  Iftheobjecttobemeasuredisreective,coveredbyadhesivetapeorblackpaintbeforemeasurement, transparent (such as glass)
the measurement may not be accurate.
4.4.  Steam,dustorsmokewillinuencethemeasurement.
4.5. This thermometer can adjust to the environment’s temperature deviation. If the deviation is large it may take approximately 30 minutes
to adjust.
4.6. Distance coefcient ratio see g.3
4.6.1. Thedistancecoefcientratioofthisproductis12:1.Forexample,iftheobjecttobemeasuredis72cmawayfromthethermometer,
 thenthediameteroftheobjectmustbiggerthan6cm.Itcanmeasureproperlyatthisdistance,butmaybeinuencedbyotherlight
sources.
4.7. Emissivity and infrared temperature measurement principle.Also refer to section 4.8.7.
4.7.1.1. Aninfraredthermometerisaninstrumentthatmeasuresthesurfacetemperature.Thisisachievedthroughinfraredemission,reection
and then converted into energy. The thermometer converts the electrical signals into a temperature reading displayed on the LCD.
The infrared energy that the object can release is in direct proportion with its temperature and emissive power. This is called emissivity,
it is related to the material and gloss of the object. The emissivity value ranges from 0.1 to 1.0.The emissivity of most organic
materials, is 0.95. Set the emissivity to 0.95, or to one of the values on the table below as required, see section 4.8.7.
Emissivity of common materials
Fig.1
Fig.2
Refer to g.2
1. Scanning and measuring procedure.
2. Hold and keep the last measured data.
3. Emissivity setting.
4. °F and °C switch.
5. Main temperature display.
6. Low voltage warning.
7. Function transformation zone.
Material
under test
Emissivity Material under test Emissivity
Asphalt 0.90 to 0.98 Cloth (black) 0.98
Concrete 0.94 Skin (human) 0.98
Cement 0.96 Leather 0.75 to 0.80
Sand 0.90 Charcoal (powder) 0.96
Soil 0.92 to 0.96 Lacquer 0.80 to 0.95
Glass 0.90 to 0.95 Lacquer (matt) 0.97
Ceramic 0.90 to 0.94 Rubber (black) 0.94
Marble 0.94 Plastic 0.85 to 0.95
Plaster 0.80 to 0.90 Timber 0.90
Mortar 0.89 to 0.96 Paper 0.70 to 0.94
Brick 0.93 to 0.96 Chromium oxides 0.78
Water 0.92 to 0.96 Copper oxides 0.78
Ice 0.96 to 0.98 Iron oxides 0.78 to 0.82
Snow 0.83 Textiles 0.90
Fig.3
VS941, VS941 | Issue 1 25/10/16
Original Language Version
© Jack Sealey Limited

NOTE: It is our policy to continually improve products and as such we reserve the right to alter data, specications 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 will be required for any claim.
Sole UK Distributor, Sealey Group.
Kempson Way, Suffolk Business Park,
Bury St. Edmunds, Suffolk.
IP32 7AR
www.sealey.co.uk
[e-mail]
01284 757500
01284 703534
Web
4.8. Temperature Measurement
4.8.1. Pointthethermometerattheobjecttobemeasuredandpressthetrigger.Tondahotspot,pointitattheobjecttobemeasured
 andmovefromtoptobottomandfromlefttorighttondit.Thethermometercandisplay:max.temperature,min.temperature, 
difference value, max. warning point, min. warning point and unit of measurement.
4.8.2. The measurement result will remain on the screen for 7 seconds after the trigger is released and it will power off if no measurement is
taken.
Note: Press Mode button for 2 seconds, when the display is on, to switch between °F and °C.
4.8.3. Dual laser spot see g.3
4.8.4. Dual laser measuring distance is up to 120cm. The temperature measured is within a 10cm diameter from the laser spot.
4.8.5. Laser on and off
4.8.5.1. Pull and release the trigger.
4.8.5.2. The thermometer will store the information until it is switched to another mode.
4.8.6. Back light (yellow button)
4.8.6.1. Pull and release the trigger.
4.8.6.2. Press the back light (yellow) button when the screen shows HOLD to turn on the back light.
4.8.6.3. The back light will remain on until another mode is selected.
Note: The back light consumes the battery. Turn it off when it is not required.
4.8.7. Emissivity also refer to section 4.7
4.8.8. Press the UP and DOWN buttons to adjust the emissivity when the display shows HOLD. The emissivity of this instrument is between
0.1 - 1.0.
4.8.9. Mode menu operation
4.8.9.1. The thermometer can measure max. value, min. value, average value, max. alarm point, and min. alarm point.
4.8.9.2. To select the Menus pull and release the trigger, when it shows HOLD, press the MODE button to enter the next programme.
Max data: only shows max. data when measuring.
Min. data: only shows min. data when measuring.
 Differencedata:showsthedifferencebetweentherstandsubsequentdata.
 Averagedata:showstheaveragebetweentherstandsubsequentdata.
HAL: to set the max. alarm temperature, press the up and down menu.
LAL: to set the minimum alarm temperature, press up and down menu.
4.8.10. Over range alarm function
4.8.10.1. If the temperature is beyond that which the thermometer can measure, it shows ‘_’ on the screen.
4.9. Battery replacement
4.9.1. When the display shows LOG replace the battery (9V). The battery is located beneath the black hinged cover under the trigger.
Environmental 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 off any fluids (if applicable)
into approved containers and dispose of the product and the 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
Remove the battery, refer to section 4.9.
Under the Waste Batteries and Accumulators Regulations 2009, Jack Sealey Ltd are required to inform potential
purchasers of products containing batteries (as dened within these regulations), that they are registered with Valpak’s
registered compliance scheme. Jack Sealey Ltd’s Batteries Producer Registration Number (BPRN) is BPRN00705.
VS941, VS941 | Issue 1 25/10/16
Original Language Version
© Jack Sealey Limited