WIKA operating instructions, model CTH7000
EN
39
08/2020 EN/BG
4. Design and function
4.5 Smart probes
4.5.1 About smart probes
Smart probes are similar to passive probes except for one key advantage - all the probe
details, calibration data and probe history are stored within the probe itself and not within
the measurement instrument.
Smart probes can be moved freely from channel to channel or from instrument to
instrument without the need to manually enter any data into the instrument.
4.5.2 How smart probes work
Each smart probe if fitted with a small non-volatile memory device; this device is
transparent during normal temperature measurement.
The probe is interrogated before a measurement cycle and the probe data is read into the
instrument for use in the measurement process.
4.5.3 Smart probe data security
To maintain a high level of data security, the smart probe has a built in data-lock. If the
data-lock is set, the smart probe data cannot be modified.
4.5.4 Smart probe calibration supervisor
To assist in maintaining valid calibration, the instrument checks the smart probe
calibration date and compares it with the instruments current date. If the smart probe date
is found to have expired, the instrument will warn the operator ‘Probe is out of calibration’.
4.5.5 Smart probe working range monitor
The smart probe working range monitor is used to monitor a smart probes working range
and to notify a user if it is used outside its specified range.
4.5.6 Smart probe error
Smart probe errors should never occur. They take the form – “Error 0xNN”, where NN is
the error code. Please refer to WIKA Technical Support if this error is seen.
