Hach Lange DR 3900 User Manual page 33

1. Select Operator ID from "Instrument Setup".
2. Enter the security password and confirm by pressing OK.
3. Set up an operator ID (refer to
4. Press Operator Password.
5. Enter the operator password and confirm with OK.
6. Press Security Level <Off>
7. Enter the security password and confirm with OK.
The current security level for the selected operator is shown.
8. Select the required security level for this operator ID and
confirm with OK.
Standard programs
section 5.2.1).
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