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Instruction Manual
IM-106-5500, Original Issue
August 2005
6-1
CCO 5500
Section 6 Troubleshooting
Fault Finding with the Keypad . . . . . . . . . . . . . . . . . . . . . . page 6-1
Troubleshooting Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . page 6-2
Component Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 6-8
LED Indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 6-8
Test Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 6-9
FAULT FINDING WITH
THE KEYPAD
Should a fault occur the display switches from its current mode of operation to
the diagnostic mode and displays the current fault condition - refer to Data
Valid LED Out. If this fault clears, the display will stay in the diagnostic mode
and display the 'All Clear'.
Enter the diagnostic mode from the keypad of the instrument; this can be
done at any time without interrupting or disturbing the analog outputs of the
equipment.
As an initial guide to equipment performance, typical values for instrument
operation are given below:
where:
• Modulation Frequency = 30 to 45 Hz
• Mark/Space Ratio = 0.9 to 1.1
• Saturation Count = 50 maximum for all analyzers
Should the values be outside of the above ranges, the Data valid LED will
extinguish, and the fault condition be displayed.
Data Valid LED Out If one or more fault conditions occur, the data valid LED on the front panel will
extinguish, the data valid relay will operate and the instrument will
automatically enter the diagnostic mode to display the fault condition.
Install all protective equipment covers and safety ground leads after troubleshooting. Failure
to install covers and ground leads could result in serious injury or death.
D2
min
D2
max
D1
min
D1
max
Set Cal
min
Set Cal
max
CCO 5500 3000 20,000 3000 20,000 2000 2900