PeakTech 1240 Operation Manual page 51

The description of Adjust Menu is shown as the follows:
Function Menu
Self Cal
Default
Do Self Cal (Self-Calibration)
The self-calibration procedure can improve the accuracy of the oscilloscope under the ambient temperature to
the greatest extent. If the change of the ambient temperature is up to or exceeds 5° C, the self-calibration
procedure should be executed to obtain the highest level of accuracy.
Before executing the self-calibration procedure, disconnect the probe or wire and the input connector. Press
the Utility button. Then, press the H1 button and the function menu will display at the left of the screen, turn
the M knob to choose "Adjust", then press the H2 button to choose "Self Cal", entering the self-calibration
procedure of the instrument.
27.2.4. Pass/Fail
The Pass/Fail function monitors changes of signals and output pass or fail signals by comparing the input
signal that is within the pre-defined mask.
Press the Utility button and turn the M knob to select the Pass/fail to go to the following menu.
Setting Description
Carry out the self-calibration procedure.
Call out the factory settings.
Fig. 56 Self-Calibration
Fig. 57 Pass/Fail menu
-140-