Briefly press [Hold] (< 1 sec).
Display flashes until the measured value has stabilized.
Wait until Auto Hold is shown in the display.
Readings are automatically held by the instrument, and if the
measurement program Frying oil quality is used in the testo Smart
App, transferred to the app afterwards.
With the alarm indicator activated, the display colour lights up.
If necessary read the measurement values.
To switch to the measuring mode: Briefly press [Hold] (< 1 sec).
7.3 Function test
For a simple function test without adjustment (accuracy +/- 3 % TPM
), we
recommend a measurement during the commissioning of your new instrument in
unused deep-frying oil at 150 to 180 °C.
We recommend performing the function test every time after refilling the deep
fryer with fresh oil.
Perform measurement in unused deep-frying oil at 150 to 180 °C, see
chapter “Carrying out measurements”.
Repeat steps 1 and 2 several times.
The average of the readings is your specific reference value for
subsequent instrument testing.
When changing the type of oil or the oil supplier, the reference value
must be determined anew.
With implausible readings, we recommend the calibration or adjustment
in the testo reference oil, see chapter “Calibrating/adjusting the
instrument”.
Your specific reference value:
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typical, referred to testo internal reference, at an ambient temperature of 25 °C