Agilent Technologies 78581B, Инструкция по установке и обслуживанию

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ACC Maintenance
4-1
Section 4: ACC Maintenance
ACC Maintenance
The Agilent CareNet Controller (ACC) is a ROM-driven microprogrammed
state machine self-contained on the Control/Driver PC board for ease of
serviceability.
Once installed and running properly, the ACC requires virtually no
periodic maintenance or servicing. However, when an electrical problem is
evident within the ACC, isolation of the problem and repair can be
accomplished using the troubleshooting procedures and self-test routines
listed in Section 3: SDN and ACC System Level Troubleshooting.
Caution
Ground wrist strap must be worn and grounded to the ACC chassis.
ACC Failure, Power Up, and Power Down Procedures
When the ACC has to be powered down for service or during a power
failure, the system communications is interrupted. If any of the branches
have more than one instrument daisy-chained on that branch, the local
distribution network (LDN) takes over and allows the daisy-chained
instruments to communicate with each other in the autopoll mode. When
power is cut off to the ACC, the following occurs to the instruments
connected to the SDN branches:
When power is restored to the ACC, the SDN bedsides that were blanked
now reappear at the IC.
Bedside Nothing perceptible happens. The monitor goes into the autopoll mode
automatically, but nothing happens to the wave forms. When attempting
to enter the OVERVIEW mode or OVERVIEW SETUP mode, the monitor
displays the message NO OVERVIEW FUNCTION AVAILABLE. When
power is restored to the ACC, the bedside display blanks for a couple of
seconds, and then resumes SDN communications.
Information Center (IC) All sectors will display “No Data From Bed.”