WIKA operating instructions, model CTH7000
EN
36
08/2020 EN/BG
4. Design and function
Selecting this option will overwrite all instrument calibration data and
settings. Do not attempt to do this unless you have the correct equipment,
environment and suitably trained personnel.
d. Diagnostics
Not available for use.
4.3.4 Setting up temperature measurement
To enable accurate resistance to temperature conversion to be carried out by the
instrument, PRT or characterisation data is required for both:
■
Temperature conversion algorithm, and
■
Temperature conversion algorithm coefficients
For thermistors, characterisation data is only required for:
■
Temperature conversion algorithm coefficients
The data can be stored in either a smart probe or the instruments’ internal non-volatile
memory, each thermometer input channel stores one set of PRT/thermistor
characterisation data. See the relevant section above for details on entering the data.
4.3.4.1 Temperature measurement with smart probe(s)
If a smart probe is detected on a selected input channel, the PRT calibration data is
loaded directly from the smart probe. smart probe data always takes precedence over the
internal CTH7000 coefficient data (but does not overwrite the instrument data).
The CTH7000 may take up to 5 seconds to recognise and acquire data from
the smart probe after switch-on before displaying a measurement.
4.3.4.2 Instrument calibration
This is not usually a customer option; refer to separate documentation.
4.3.4.3 Firmware version
The firmware version is shown at the bottom of the LC display when the instrument is first
powered.
