7
4-2. High-Temperature Measurement
Operating the thermometer continuously to measure a high-temperature (200ºC or more) object at a
short distance (30 mm or less) for a long time (three minutes or more) may cause a drop in the
performance of the infrared lens. When measuring a hot object of 200ºC or more, the distance
should be 30 mm or more and operation should be completed within a short time.
There is also the risk of burning your hand by accidental contact with an excessively hot object.
Secure a safe distance from the object if the object is known to be hot.
Note: Measuring high temperature object may damage the infrared lens and cause loss of
measurement accuracy. Never measure an object whose temperature is outside the allowable
temperature range state.
4-3. Low-Temperature Measurement
The operation ambient is 0 to 50ºC. The measurement in the lower than 0 ºC state such as in a
refrigerator cannot be done.
If the ambient temperature fluctuates excessively, the measurement accuracy may be affected. Wait
for a while for the unit to properly adapt to the ambient temperature. For a change of temperature of
10ºC or more, wait for at least 30 minutes before measurement.
5. Emissivity
The emissivity of this thermometer is preset at 0.92.
Infrared radiation is naturally emitted from all objects, but the emissivity value depends on the type of
object to be measured. For accurate measurement, see the table 1.
5-1. Setting the emissivity
Emissivity is selectable among 0.98, 0.92 and 0.85. While pulling the trigger, select the emissivity
with MODE
測定物選択
key.
5-2. Emissivity
Table 1
Emissivity
0.98
0.92
0.85
Object
Meat Fish
Vegetable
Fruit
Bread
Wheat Grain
Paper
Drink box
Frying pan
Cast-Iron pan