WIKA CTD9300 - Handbuch (Seite 38)

9037926 03/2005
Temperature Dry Well Calibrators CTD 9300
3. Moduses and Functions
GB
38 WIKA Operating Instructions CTD 9300 Rev. 1
This menu comprises the parameters for linearising the internal
reference thermometer.
The internal reference
thermometer is linearised in two
stages. First of all, using a basic
linearisation that is always
performed and thereafter using
an individual fine linearisation.
In this case, "t'" is the
temperature following the basic
linearisation.
t
display = P0 + P1 * t' + P2 * t' ² + P3 * t' ³ + P4 * t' 4
Linearisation CTD 9300-650 CTD 9300-165
parameters
P0 0 0
P1 1 1
P2 0 0
P3 0 0
P4 0 0
Using these parameters, only the general basic linearisation is
enabled and fine linearisation is switched off. In the case of DKD
calibration of the temperature calibrators, the errors of
measurement of the reference are exactly determined and the
parameters P0 to P4 are set to the optimum.
Fine linearisation can be disabled by setting the switch to OFF.
This function simplifies the determination of new parameters Pn
for adjusting the reference, at an autuorised laboatory.
The user should not edit these settings.
3.1.3.1 Internal Reference
Fig. 23: Internal reference
parameter set