WIKA CTD9300 Benutzerhandbuch
Seite 39
9037926 03/2005
GB
Temperature Dry Well Calibrators CTD 9300
3. Moduses and Functions
39
WIKA Operating Instructions CTD 9300 Rev. 1
3.1.3.2 External Reference
This menu comprises the parameters for linearising the external
reference thermometer.
The external reference
thermometer is also 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.
Fig. 24: External reference
parameter set