General Tools and Instruments VR40 - Manual (Page 19)

To change the temperature unit, press the NCV and
IRT buttons at the same time. Each simultaneous press
will toggle the unit between °C and °F. The selected unit
will appear on the display to the right of the measured
IR temperature value. The last temperature unit
selected will be recalled the next time the VR40 is
activated.
To temperature-scan the surfaces of a room or any
environment, press and hold the IRT button as you aim
the laser pointer in various directions. Note that the IR
temperature readout will track the different
temperatures of different surfaces in real time, and hold
the temperature of the surface being scanned when
you release the IRT button.
SPECIFICATIONS
Overall Voltage Detection Range: 12 to 600VAC
@ 50/60Hz
Detection Ranges/Sensitivities: 12 to 25VAC,
70 to 125VAC, 150 to 240VAC, 250 to 600VAC
Non-contact Detection Distance: 0.25 in. (6.2mm), max
Safety Rating: CAT III 600V
IR Thermometer D:S Ratio: 4:1
IRT Measurement Range: -4° to 626°F (-20° to 330°C)
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