Unipulse f395 - Digital Zero

6.Settings and Operations Relating to Indicated Values
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6-4. Digital Zero
Indicated values are zeroed forcedly by this function. There are two methods as follows:
1. Press the DZ key on the main screen.
2. Short-circuit D/Z and COM of the control connector.
Digital Zero can be operated only when the Set Value Protection
setting is either "CAL. Protect" or "All Protect," or the LOCK switch on
the rear panel is ON.
Also, the displacement input value cannot be zeroed by the above
methods.
It is automatically zeroed when sampling starts if the Level Axis
Select setting (See "16-2-9. Level Axis Select / Waveform Start Level
/ Waveform Termination Level / Hold Start Level" P113.) is "Y-axis" in
the Hysteresis / Hysteresis 2 / Waveform and Displacement
Comparison mode with the above condition met. (See "13-5.
Waveform and Displacement Comparison Mode" P74.)