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Instruction Manual
IM-106-5500, Original Issue
August 2005
CCO 5500
4-2
MODES OF OPERATION The instrument has six modes of operation identified by a number in the top
left corner of the display:
Mode 1 - Operating Mode
Displays average gas concentration.
Mode 2 - Parameter Mode
Displays operating parameters.
Mode 3 - Normalization Mode
Displays normalization data.
Mode 4 - Diagnostic Mode
Investigates instrument operation. Self checks are continually made by the
instrument; should a complication exist, this mode will automatically be
selected and the fault displayed on the display.
Mode 5 - Setup Mode
Sets operating parameters. The opening parameters must be entered for
the instrument to function correctly. This mode can only be accessed using
a security code.
Mode 6 - Check Cell Mode
Used to verify the instruments’ operation and calibration.
NOTE
The outputs of the instrument are unaffected by key operation in all modes
except the setup mode.
Figure 4-1. Keypad
Mode
Enter
32 Character
Liquid Crystal Display
Key Panel
Data Valid and
Alarm LEDs
AlarmData Valid