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Cyclops L
Portable Thermometers
User Guide
9.2 Operation (Example 2: complex temperature measurement)
In some industrial applications, a window or viewing port may be situated
between the thermometer and the target object. This can lead to a reduction in
the amount of radiant energy reaching the thermometer from the target.
The following instructions detail the operation of a
Cyclops
in a typical complex
temperature measurement application (as in Fig. 9-1).
Fig. 9-1 Typical complex temperature measurement application
Viewing port window
e.g. Glass - typical window
compensation factor
(0.920)
Hot target:
Mild steel
Typical emissivity value (0.35)
1) Check the battery status, ensure that there is sufficient battery life
remaining.
2) Go into
Menu Mode
, open the
Trigger Mode
menu and select
Classic
Mode
.
3) Enter the
Emissivity
value for the material under observation (0.35).
If the window compensation factor of the viewing window/port is known:
4) Set
Window Compensation
to
On
.
5) Enter the known compensation factor (e.g 0.920 for Glass, 0.880 for
Sapphire)
If the ‘Window Compensation’ factor of the viewing window/port is not known:
6) Take and record a reading with the thermometer of a known temperature
value, with the emissivity set to correspond and the
Window
Compensation
factor set to default (i.e. blackbody heat source,
emissivity set to 1.00 and
Window Compensation
set to 1.000).
7) Place a spare viewing window/port between the thermometer and the
blackbody heat source and take a new temperature reading.
8) Enter the
Window Compensation
>
On
sub-menu and amend the
Window Compensation factor value with the
and
keys until the
display temperature reads the same as the recorded value taken from
the known value source. You must now use this
Window Compensation
value, as it is correct for the chosen viewing window/port material (e.g.
0.880).
9) Select the
Instantaneous
temperature measurement option.
