VMI VIBER X5 MKIII, Instrument Manual, Page: 65 / 121

65
Warning!
Incorrect setting of the emissivity factor can lead to considerable errors of measured
temperature.
Table 0-1: Emissivity Factors
7.6. Temperature
In the Temperature menu, you can as an example
measure the bearing house temperature (or any other
surface temperature) with the built-in infrared temperature
sensor.
From Main menu select Measure and Temperature .
7.6.1. Temperature Settings
When choosing Temperature measurements the
instrument will display the Temperature settings menu.
In the Settings menu, the following parameters might be
set:

Show unit. Celsius (°C) or Fahrenheit (°F).

Emissivity factor (see table below for usual
values function of material)

Averaging (Disabled, Linear, Smart)

No of Averages (1, 2, 4, 8, 16, 32 or 64)
By pressing (F4), all the parameters will be set as
default values.
Press (OK)to start measurement. Press (ESC) to exit.
7.6.1.1. Emissivity
Set the coefficient for surface reflection factor (Emissivity
factor) using, check via a contact probe (the table with
emissivity factors is also implemented in the instruments
context sensitive help menu).
It is very difficult to get an accurate temperature reading
on untreated metals. A coating like paint, oil or emission
adhesive tape applied to the object will considerably
improve the accuracy of the measurement.
Material Emissivity
factor
Heat sink, black
anodized 0.98
Paper 0.97
Black paint, matt 0.97
Ice, smooth 0.97
Wood 0.94
Glass 0.94
Rubber, hard 0.94
Transformer paint 0.94
Concrete 0.93
Brick, mortar,
plaster 0.93
Porcelain 0.92
Steel, oxidized 0.79
Cooper, oxidized 0.76
Steel, heat
treated surface 0.52
Copper 0.04
Aluminium, bright 0.04
Figure 0-2: Temperature Selection
Figure 0-3: Temperature Settings