Fluke 80T-IR Thermometer User Manual


 
Table 1.
Display Codes Condition Action
1041
°
F Target temperature
is over range.
Select target within
probe's specified
temperature range.
-135
°
F The temperature of
the probe is near
the low ambient
operating range
limit.**
Ensure that the
probe is within the
specified ambient
operating range.
-192
°
F Battery power is low. Replace the
battery.
0°F Sleep mode or
battery is dead.
Restart the probe
by sliding switch to
"OFF" and then to
"ON", or replace
battery.
* All values are nominal.
** Although a display code may be present, the displayed
reading is valid if the probe is within the specified ambient
operating range.
Distance to Spot Size Ratio
Distance to Spot Size Ratio (or Field of View) refers to the
diameter of the spot that the probe is sensing at a given
distance. The closer you are to the object (or target), the
smaller the area (or spot) the probe is sensing. For
example when the probe is held at a 200 mm (8 in.)
distance from the target, the spot size is approximately 50
mm (2 in.); at 100 mm (4 in.) the spot size is
approximately 25 mm (1 in.), and with the probe held at a
50 mm (2 in.) distance from the target, the spot size is
approximately 13 mm (1/2 in.). Hot spots can be missed if
too large an area is included in the field of view, so get as
close as possible! (See Figure 2.)