Specifications – UEi Test Instruments INF215 User Manual

Page 5

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EMC/RFI
Readings may be affected if the unit is operated within radio frequency
electromagnetic field strength of approximately 3 volts per meter, but
the performance of the instrument will not be permanently affected.

IR Thermometers
I n f rared Thermometers measure the amount of thermal radiation emitted
from an objects surface. To take a measurement, the object must be
within the field of view of the infrared thermometer, or the reading may
include objects surrounding your target. This target size is determined in
the distance to spot ratio stated on the instruments specifications. At a
ratio of 9:1, a distance from your target of nine feet will give you a circle
with one foot diameter. At 20:1 ratio gives the same one foot target
n ow at 20 feet, so you can see that higher is better, but ty p i cally more
expensive due to the cost of the optics involved.

The other common question is regarding emissivity. In simple terms
e m i s s i v i ty is a percentage of energy emitted from a surface compared to
the energy emitted from a black body source. If a surface emits one half
( 1/2 or 0.5) the amount of energy at a given temperature and wavelengt h
as a black body, it is said to have an emissivity of 0.5.

Surfaces closest to the black body level would be flat black, and those
farthest from it would be mirror or chrome surfaces. With a set emissivity
level some surfaces may measure lower than actual, because their surface
is emitting less thermal radiation at a given temperature. Although you
may have a fixed emissivity of 0.95, most items measured will provide a
reasonably accurate result. Having a fully adjustable emissivity will give
you the ability to fine tune your instrument to a specific applica t i o n .

To determine the emissivity of the surface being tested, paint a portion
with flat black paint, and then measure the temperature of the painted
area and compare it to the temperature of the standard surface. Use
the following to determine the emissivity to use.

Te m p e rature (Standard area) divided by temperature (painted area). As
an example 61° in the standard area and 68° painted is 61/68 or 0.89

INF185/215-MAN

P. 4

Lens Care
The sensor lens is the most delicate part of the thermometer. The lens
should be kept clean at all times. Care should be taken when cleaning
the lens using only a soft cloth or cotton swab with water or medical
alcohol. Allowing the lens to fully dry before using the thermometer. Do
not submerge any part of the thermometer in liquids.

WARNING!

Under NO circumstance should you expose batteries to extreme heat or
fire as they may explode and cause injury.

NOTE: This instrument contains no user serviceable parts. If service
becomes necessary, call UEi and ask for the service department. See
the warranty section of this manual for additional details.

Specifications

INF185

INF215

NOTE: Under the electromagnetic field of 2V/m from 200 to 600 MHz,
the maximum error is 18˚F (10˚C).

Item

Non-contact Infrared Scan Thermocouple Probe Scan

Measurement range

-76˚ to 932˚F

-83.2˚ to +1999˚F

(-60˚ to +500˚C)

(-64˚ to 1 400˚C)

Operating range

32˚ to 122˚F (0˚ to +50˚C)

Accuracy
(Tobj=-59˚-95˚F,

±1.8˚F (1.0˚C)

±1% of reading or 1.8˚F

Tamb=77˚C)

(1.0˚C) whichever is

(Tobj=-27˚-932˚F,

±2% of reading or 4˚F

greater (Test under

Tamb=73˚±3˚C)

(2˚C) whichever is greater

Tamb=73±6˚F)

Resolution
(-9.9-199.9˚F)

0.10˚F / 0.1˚C

Response time (90%)

1 second

Distance: Spot

12 : 1

Battery life

Standard “AAA” (x2), 140 hours

Dimensions

6.9” x 1.5” x 2.8” (175.2 x 39.0 x 71.9mm)

Weight

179 grams