4.7 Calibrating the DL850/DL850V
CAL Menu
Press SHIFT+SETUP (CAL) to display the following menu.
Executes calibration
Turns auto calibration on and off
Calibration
The following items are calibrated. Execute calibration when you want to make accurate
measurements.
• V
ertical axis ground level and gain
• Trigger threshold level
• Measured time value for repetitive sampling
Note
Calibration is performed automatically when the power switch is turned on.
Notes about Calibration
• Allow the DL850/DL850V 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 an environment with a stable temperatu
re 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 DL850/DL850V.
Auto Calibration (Auto Cal)
Auto calibration is executed when you start signal acquisition if you have changed Time/div and any of
the time periods listed below has elapsed since the power was turned on.
• 3 minutes
•
10 minutes
• 30 minutes
• One hour and every hour thereafter
If calibration is executed while signals are being applied to the DL850/DL850V, we recommend that
you recalibrate the DL850/DL850V without any signals being applied to it.
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