Common Operations
3-15
IM DLM4038-03EN
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App
Index
3.7 Calibrating the DLM4000
Procedure
UTILITY Calibration Menu
Press
UTILITY
and then press the
Calibration
soft key to display the following menu.
Executes calibration
Turns auto calibration on and off
Explanation
Calibration
Calibrates the following items. Execute calibration when you want to make accurate measurements.
• Vertical axis ground level and gain
• Trigger threshold level
• Measured time value for repetitive sampling
Note
Calibration is automatically performed for the settings listed above when the power switch is turned on.
Notes about Calibration
• Allow the DLM4000 to warm up for at least 30 minutes before you execute calibration. If you
execute calibration immediately after power-on, the calibrated values may drift due to temperature
changes or other environmental changes.
• Execute calibration in a stable temperature environment ranging from 5 to 40°C (23 ± 5°C
recommended).
• Do not apply signals when calibrating. Calibration may not be executed properly when input signals
are being applied to the DLM4000.
Auto Calibration (Auto Cal)
Auto calibration is executed when you perform one of the following operations and any of the time
periods listed below has elapsed since the power was turned on.
3 minutes, 10 minutes, 30 minutes, 1 hour, and each following hour
• When you change time/div during waveform acquisition (when the RUN/STOP key is illuminated)
• When you start waveform acquisition after stopping waveform acquisition (so that the RUN/STOP
key is not illuminated)
If calibration is executed while signals are being applied to the DLM4000, we recommend that you stop
signal application and recalibrate the DLM4000.
