BrandTech Scientific Titrette - Manual (Page 50)

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What to do How to do it Keys to press Display readout
The continuously displayed CAL symbol indicates that the factory default setting has been changed.
If you wish to restore the factory default setting, complete the following instructions.
1.
Bring up the
CAL mode
When CAL appears in the
display, release the CLEAR
key. The input symbol blinks
and the adjustment value
for the previously accepted
adjustment appears.
Press the On/Off key and
Pause key at the same time
in order to delete the CAL
symbol.
2.
Restoring the
factory default
setting
Factory Default CAL Mode · Easy Calibration Technique
With the instrument powered
on, press and hold the
CLEAR key for more than
3 seconds. The following
modes will be repeatedly
shown in the display after
one another:
CAL - GLP - APO - dP.