WIKA CTH6200 - Handbuch (Seite 13)

WIKA Betriebsanleitung Hand-Held Thermometer
2146872 09/2004 GB/D
13
GB
WIKA Operating Instructions Hand-Held Thermometer
Hand-Held Thermometer
CTH 6200
The sensor curve following EN60751 uses the international
temperature scale ITS90 and following formulas:
Temperatures <0 °C:
R
neg
(T): = 100 [1 + 3,908310 -3 * T - 5,77510 -7 * T 2 - 4,18310 -12 * (T - 100) * T 3 ]
Temperatures >=0 °C:
R
pos
(T): = 100 (1 + 3,908310 -3 * T - 5,77510 -7 * T 2 )
2.4 (OFFs) Zero point correction / Offset
A zero point correction can be carried out for the measured
temperature:
temperature displayed = temperature measured - offset
Standard setting: ´off´ = 0.0 °, i.e. no zero point correction will be
carried out. The zero point correction is mainly used to compen-
sate for sensor deviations. Unless ´off´ is set, this value will be
displayed shortly after the device is switched on;
during operation it will be identified by means of the offset arrow in
the display.
2.5 (Scal) Scale correction
The scale of the measuring can be influenced by this setting
(factor is in %).
displayed temperature [°C] = measured temperature [°C] * (1 + Scal/100)
or respectively
displayed temperature [°F] = (measured temperature [°C] - 32
°F) * (1 + Scal/100) + 32 °F
Standard setting: ´off´ =0.000, i.e. temperature is nor corrected.
Together with the zero displacement (see above) this factor is
mainly used to compensate for sensor deviations.
Unless the factor is set to ´off´, the Corr arrow in the display shows
an active scale correction.