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FAQ 1 / 2 / 3 / 4 / 5 / 6

FAQ 3.
 
Accuracy
 

 

  
 
Why accuracy is 2°C or 2% of reading whichever greater?
 
IR Thermometer is non-contact style measuring tool with certain distance to get surface temperature by receiving all items' infrared. Basically this may let you know the accuracy would be larger then contact style, especially while they are still some distance existing between measured target and thermometer.
Why 2 degree C or 2% of reading whichever is greatter? Because of above issues, the world leader manufacture of Infrared Thermometer, Raytek (now is owned by Fluke), found all item have different emssivity which impact temperature reading. But lucky,  most of item would be near 0,95 area.  Most item in the world is between 0.93 to 0.97 which means there would be may some accuracy issues involved. Thus they follow the optics and  statistics theories creating 2 degC accuracy.
                           
Since Raytek is the leader in this industrial, every body follow their rules as guideline. Of course, when you check all IR thermometer in the market, you will find this accuracy is almost a principle  for whole industrial.
 
Accuracy is stated as "?1%,1°C" (the typical accuracy translation is ?1% or reading; ?1°C).  With 1% accuracy, at 100°C, allowable error would be ?2°C (?3.6°F); at 250°C allowable error is ?3.5°C (?6.3°F).
 
Below 100degC, the spec is +/-1degC, above 100 degC, the spec is +/-1%.
For 100degC, the spec is +/-1.0 degC, For 250 degC, the spec is +/-2.5 degC
                           
 
 

 

  
 
Emissivity
 
What is Emssivity?
 
1.Emissivity is a term used for the ability of a surface to radiate energy. Most (90% of typical applications) organic materials and painted or oxidised surfaces have an emissivity of 0.95 (pre-set in the thermometer).
2. Inaccurate readings will result from measuring shiny or polished surfaces. To compensate, cover the surface to be measured with masking tape or flat black paint.
3. Allow time for the tape to reach the same temperature as the material underneath it. Measure the temperature of the tape or painted surface.
 
Any reference information regarding emssivity?
 
                           
 
 

 

  
 
ER code
 
What error code "ER5" stands for? How we do?
 
We found the data in the EEPROM had been lost. RD had improved this problem by adding some protecting elements.There are many factors may cause the memory lost, one of them is ESD and/or  EOS.
For those customers who purchasing TN4xxLC, please inform customer, while they are using the external thermocouple probe,please don't try to measure the temperature of high voltage or high ESD risk parts.
 
 

 

  
 
Manual
 
Please explain Tobj , Tamb and e mean?
 
Tobj=the target surface temperature
Tamb=the ambient temperature
e=emissivity
 
What is meant by Accuracy? (Tobj=35°C, Tamb=25°C)
 
When the target surface temperature is 35°C and ambient temp. is 25°C, the accuracy suppose to be 1°C
What is meant by Accuracy? (Tobj=33-220°C, Tamb=23+/-3°C)
 
When the target surface temperature is 33-220°C and ambient temp. is 23+/-3°C, the accuracy would be 2°C or 2% of reading whichever is greater.
 
 

 

  
 
Applications
 
Automobile Applications
 
Check temp for misfiring spark plugs, dead cylinder & fuel injectors.
Diagnose cooling systems, pinpoint radiator care restrictions, locate coolant leaks.
Conduct accurate measurements of thermostat open/close temps.
A /C heater core diagnostics, detect overheating electrical components, fuse links, connectors.
Quickly locate wheel end problems, braking systems, wheel bearings.
Check catalytic converter inlet/outlet: if the catalytic converter is working, the outlet should have a higher temp than the inlet.
Check tire temperature
Consider Formula-1 racing: After a 60mph run, if one tire has a much higher temp than the hers, that tire may need to be re-balanced, inflated or re-aligned.  A high tire temperature also means a low mileage per gallon
 
Indoor Applications
 
Find voids of insulation between walls of sheetrock in homes, monitor the insulation efficiency of walls, pipes and windows.  (Make your home Energy Smart)
Inspect doors and window seals to detect drafts and heat loss.
Spot-check central heating systems, thermostat settings and actual room temperatures.
Verify the performance of water heaters, wood stoves and air conditioning, etc.
Monitor Outlet Air Temp.

 
Kitchen Applications
 
Quickly check temperatures in the wine-cooler, refrigerator and freezer.
Ensure best temp for certain wines, without touching the liquid.
Verify safe cooking and serving temperatures of food and drinks.
Avoid guesswork while making jam, chocolates and other specialty cooking items.
Check the temperatures of cooking surfaces when grilling or frying.
Easily monitor temperatures while making beer or storing wine.
Check the temperature of hot items which is going to put into your mouth. If you get temperature over 49C / 120F. Don't put it into your mouth, the temperature will burn your tongue.
 
 
 

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