4-20 IM 701450-01E
Explanation
Calibration
The following items are calibrated. Perform calibration when you wish to measure
waveforms with high accuracy.
• Ground level and gain of the vertical axis
• Trigger threshold level
• Time measurement value during repetitive sampling
Note
The calibration described above is performed automatically when the power switch is turned
ON.
Precautions to Be Taken When Performing Calibration
• Always allow the instrument to warm up for at least 30 minutes after the power is
turned ON before starting calibration. If calibration is performed immediately after the
power is turned ON, the calibration may be inaccurate due to drift caused by
fluctuation in the temperature of the instrument.
• Calibration must be performed when the temperature of the instrument is stable and is
between 5°C and 40°C (preferably at 23°C±5°C).
• Do not apply a signal when performing calibration. Calibration may be executed
incorrectly when an input signal is being applied.
Auto Calibration
Calibration is automatically performed when T/div is changed and waveform acquisition
is started for the first time after the following time elapses after turning ON the power.
•3 minutes
• 10 minutes
• 30 minutes
•1 hour and every hour thereafter
If calibration is executed while a signal is applied to the DL7400, it is recommended that
the DL7400 be recalibrated without applying a signal.
4.6 Performing Calibration
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