Minimum And Maximum Temperature; Changing The Temperature Units; Back Light; Measurement Inaccuracies - La Crosse Technology InfraScan IR-101 Instruction Manual

3. Minimum and maximum temperature indication
The minimum and maximum value memories are cleared at the start of a
measurement by pressing the operating button. The temperature will be
measured and the minimum and maximum temperatures will be determined for
as long as the button is pressed. The minimum temperature is shown in the
lower left-hand part of the display and the maximum temperature can be seen in
the lower right hand part. These values each apply to the current measuring
cycle and are cleared as soon as the button is pressed again.
4. Changing the temperature units ( °F/°C )
The units for the temperature display can be switched between degrees Celsius
(°C) and degrees Fahrenheit (°F) by pressing the button briefly twice (double
click).

5. Back light

The LCD back light is constantly switched ON while the operating button is
pressed. When the operating button is released, the backlight will be ON for
approximately 4 seconds before automatically switching off 8 seconds after the
last measurement.

6. Measurement inaccuracies

The following points should be observed in order to avoid measurement errors:
a. It must be ensured that the object to be measured completely fills the
Infrared Thermometer monitoring area. Errors can occur when
measuring small objects, as the unit also monitors the temperature of
the surroundings as well as the object to be measured.
b. The principle of measurement requires the ambient temperature to be
determined. This takes place at one-minute intervals or each time the
unit is switched on. Changes in the ambient temperature, which can
occur when the user holds the unit in their hand, are not monitored
within this time period and therefore neither of them is taken into
account when determining the indicated temperature. A gradual
warming of the unit (the lens) between ambient temperature
measurements can, for example, lead to the indicated temperature
slowly falling.
c. If the emission factor for the object does not correspond to the preset
value of 0.95, the temperature will not be calculated correctly. Most
surfaces have an emission factor in the range of 0.8 to 0.98. In general,
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