B&K Precision 830C - Manual - Manual (Page 42)

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Figure 12 - Steps to Toggle Key Keep
Lock Buttons (LbUt)
The front push buttons can be locked by changing the
settings of this option. When “ON”, buttons will be
locked and cannot be pressed upon turning on the
meter. All buttons are disabled at this point except the
button, which can be used to turn off the
meter. The power-on option can still be operated
even if buttons are locked. This will provide users