Table 1.

Display Codes

Condition

Action

1041°F

Target temperature

Select target within

 

is over range.

probe's specified

 

 

temperature range.

-135°F

The temperature of

Ensure that the

 

the probe is near

probe is within the

 

the low ambient

specified ambient

 

operating range

operating range.

 

limit.**

 

-192°F

Battery power is low.

Replace the

 

 

battery.

0°F

Sleep mode or

Restart the probe

 

battery is dead.

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.)

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Image 5
Fluke E, 80T-IR instruction sheet Distance to Spot Size Ratio, Display Codes Condition Action