Optex PT-7LD, Instruction Manual

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[Emissivity Ratio(HOT/COLD mode)]
Enter the setting mode for "Emissivity Ratio (HOT/COLD
mode)" according to the procedure described in page 11.
The initial setting is HOT (
ε
=0.95).
Press or button in the setting mode to change the
emissivity ratio (HOT or COLD).
Press SET/ENTER button to set the emissivity ratio.
[Setting " ˚ C/ ˚ F mode"]
Enter the setting mode for "˚C/˚F mode" according to the proce-
dure described in page 11. The initial setting is ˚ C.
Press or button in the setting mode to choose the tem-
perature display unit whether
˚C or ˚F mode.
Press SET/ENTER button to set the temperature display unit.
* When it is set for ˚ F mode, the displayed temperature value
measured, set or stored in memory is automatically converted
to Fahrenheit in any mode.
[Record Erasing]
Note this function is to erase all the stored records in memory.
It is not able to erase data one by one.
Enter the setting mode for "Record Erasing" according to the
procedure described in page 11.
Press or button in the setting mode to select "CLR" sign on
the display.
Press SET/ENTER button, and all the recorded data are erased.
* If you wish to cancel the Record Erasing, press button to select "ESC" sign on the
display and press SET/ENTER button. Then, you can return to the setting mode again.
* Please note that OPTEX is not liable for any loss of data.
Emissivity (
ε
)
Emissivity is a value that indicates the infrared energy emitted from the surface of an object. Every object has its own emissivity
value and it varies depending on the surface condition or the temperature of the object. The emissivity ratio of PT-7LD is fixed at two
points, i.e., HOT (
ε
=0.95) and COLD (
ε
=0.85).
Example : HOT (
ε
=0.95): F ood, rubber, plastic, painted area, etc.
COLD (
ε
=0.85): F rozen food (frosty surface), etc.
If the object has different emissivity value from either of the above ratio, there could be some possibilities that the measured
temperature value on the display shows different from the actual temper ature value of the object. Refer to the above examples as
a guideline for setting HOT/COLD mode. When you wish to measure shiny object like metals, put a piece of optional black tape
(
ε
Setting
–– "Emissivity Ratio (HOT/COLD mode)", " ˚ C / ˚ F mode" and "Record Erasing"
14
[COLD mode]
"COLD" and "0.85" are displayed in turn.
[HOT mode]
"HOT" and "0.95" are displayed in turn.
[ ˚ C mode]
[ ˚ F mode]
[Record Erasing mode]
[Record Erasing Cancel mode]









=0.95) on the surface of the measuring object to cover the measuring area, if possible.