Extech Instruments 42545 User Manual

Model 42545 Version 1.1 12/ 04
5
Field of View
The meter’s field of view is 50:1. For example, if the meter is 12 inches from the target
(spot), the diameter of the target must be at least .24 inches. Other distance ratios are
shown in the field of view diagram.
The target should always be larger than the spot size. The smaller the target the closer you
should be to take measurements. In instances were accuracy is critical make sure your
target is at least twice the spot size.
Note that measurements should normally be made less than 3 feet from the target. The
meter can measure from further distances but the measurement may be affected by
external sources of light. In addition, the spot size may be so large that it encompasses
surface areas not intended to be measured.
0.72”
1”
2”
25”
36”
50”
Distance to Object
Diameter of Spot
0.5”
100”

Extech Instruments 42545 Specifications

Infrared Thermometer Specifications

range	-58 to 1832°F (-50 to 1000°C)
resolution	0.1°C/F
accuracy	± (2% of reading + 9°F/4°C) <30°F (-1°C)
emissivity	Adjustable from 0.1 to 1.00 (0.95 default value)
field of view	D/S = Approx. 50:1 ratio
laser power	Less than 1mW (Class II)
spectral response	8 to 14 μm (wavelength)

General Specifications

display	4½ digit backlit LCD display with function indicators
display rate	1 second approx.
operating temperature	32°F to 122°F (0°C to 50°C)
operating humidity	Max. 90% RH
power supply	9V battery
automatic power off	Approx. 7 seconds after the trigger is released
weight	10.2 oz. / 290g
dimensions	3.9 x 2.2 x 9.0” (100 x 56 x 230mm)