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TTI-22 Iss.04– 11/15
1.
Before entering the calibration parameters, make sure that the date stored in TTI-22 is correct (see
Chapter 7.2).
The date is stored together with the calibration parameters.
2.
Switch to the menu mode and select the menu 2 Edit Configuration.
3.
Enter the user password and then select the menu item 3 Sensors > 1 New/Edit Calibr.
The calibration parameters of up to 30 sensors can be entered. Initially all 30 lines display "---------
Free".
In the example in Fig. 7 - 5 calibration parameters for several sensors have already been entered, with
the sensor numbered "000001" having been assigned to channel 1 and the sensor numbered "125607"
assigned to channel 2.
Fig. 7 - 5
Display of menu item
4.
Select the first line displaying "--------- Free" with the <
> key.
5.
Select the temperature calculation method and/or the temperature range (see Appendix D).
If the norm is not specified on the calibration certificate, you can use the calibration parameters on
the calibration certificate for differentiation. With DIN IEC 751 the parameter R0 is always used,
whereas with ITS-90 the parameter R(0.01 °C) is specified.
•
For industry sensors, e.g. the sensors described in Appendix G, select DIN IEC 751.
•
For standard thermometers select one of the 11 ranges of ITS-90.
6.
Enter the calibration number Cal.No. written on the sensor and in the calibration certificate.
7.
Enter a calibration time Cal.Time according to your experience and/or accuracy requirements.
Caution:
The calibration time mainly depends on the thermal stress on the platinum thermometer. This
calibration time can only be estimated and is decided by the user. Therefore check your sensor
including TTI-22 regularly (independent of the calibration time) and after major thermal stress at
the triple point or freezing point of water. We recommend a yearly recalibration.
At the end of the calibration time the message "SENSOR CAL TIME" is displayed next to the
channel in question. No temperature is displayed.
The overtime exceeding the validity limit of the calibration is displayed in the menu New/Edit
Calibr. (e.g. "-14" means that the calibration has been invalid for 14 days).
