42 1000 X-Series Oscilloscopes Service Guide
3 Calibrating and Adjusting
User Calibration
Perform user-calibration:
• Every five years or after 10000 hours of operation.
• If the ambient temperature is >10° C from the calibration temperature.
• If you want to maximize the measurement accuracy.
The amount of use, environmental conditions, and experience with other
instruments help determine if you need shorter User Cal intervals.
User Cal performs an internal self-alignment routine to optimize the signal path in
the oscilloscope. The routine uses internally generated signals to optimize circuits
that affect channel sensitivity, offset, and trigger parameters. Disconnect all
inputs and allow the oscilloscope to warm up before performing this procedure.
Performing User Cal will invalidate your Certificate of Calibration. If NIST (National
Institute of Standards and Technology) traceability is required perform the
procedures in Chapter 2 in this book using traceable sources.
To perform User Cal
1 Disconnect all inputs from the front panel and allow the oscilloscope to warm
up before performing this procedure.
2 Make sure user calibration protection is not on by pressing the [Utility] > Options
> Auxiliary; then, press the Cal Protect softkey to disable calibration protection.
3 Press the [Utility] key; then, press the Service softkey.
4 Begin the User Cal by pressing the Start User Cal softkey.
User Cal Status
Pressing the User Cal Status softkey displays the following summary results of the
previous User Cal, and the status of probe calibrations for probes that can be
calibrated. Note that AutoProbes do not need to be calibrated, but InfiniiMax
probes can be calibrated.
Results:
User Cal date:
Change in temperature since last User Cal:
Failure:
Comments:
Probe Cal Status:
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