Oakton 35629-20, Instruction Manual

English

9

English

How to Accurately Measure
Temperature

Locating a Hot or Cold Spot 

To find a hot or cold spot, aim the thermome-
ter outside the area of interest. Then slowly
scan across the area with an up and down
motion until you locate the hot or cold spot.

Field of View  

Make sure that the target is larger than the
unit’s spot size. The smaller the target, the
closer you should be to it. When accuracy is
critical, make sure the target is at least twice
as large as the spot size. (See the diagram on
the side of the unit.)

Yes

No

Emissivity 

Emissivity is a term used to describe the
energy-emitting characteristics of materials.
Most organic materials and painted or oxi-
dized surfaces have an emissivity of 0.95.
Inaccurate readings can result from measur-
ing shiny or polished metal surfaces. To
compensate for this, adjust the unit’s emis-
sivity reading (see “Setting the High Alarm,
Low Alarm, and Emissivity”), or cover the
surface to be measured with masking tape or
flat black paint. Allow time for the tape or
paint to reach the same temperature as the
the material underneath it. Measure the tem-
perature of the tape or painted surface.