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SMC sierra monitor corporation Sentry Instruction Manual - Version 6
APPENDIX C - ACCESS CONTROL BY USER CODE
Page: 92
8.3.6 LOST ENTRY CODE
If the Entry code is misplaced it will be necessary to
ENTER the "CALIB/CHANGE" activity and delete all codes
as described above. To enter the "CALIB/CHANGE"
activity:
1. Turn Sentry off and then on to start the warm-
up.
2. Press RESET key three times to "RESET
HISTORY"
3. Press ENTER to display "USE ARROWS/ENTER"
"ENTRY CODE=0"
4. Press TEST key THREE times. No changes will
be apparent.
5. Enter the entry code: 9999.
6. The "CALIB/CHANGE" light will turn on and the
"SET USER CODE" activity can be selected so
that the entry code can be changed.