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Instruction Manual
IM-106-880C, OI
September 2009
4-3
Hazardous Area OCX 8800
Lockout
The LOI has a lockout feature that prevents nuisance actuation by someone
brushing against the glass window, raindrops, dirt, insects, etc. This lockout
mode is automatically established when no buttons are pushed for 30
seconds (default). This countdown to lockout is configurable.
In order to unlock the display, input a "Z" pattern (Figure 4-3). First, touch the
top left (gray) Enter key. Next, touch the top right key, followed by the bottom
left key and the bottom right key. The LK notation in the upper right corner of
the display will disappear. Touch the Enter key once more to enter into the
menu structure. Whenever a key is touched additional time to lockout is
provided, so that the lockout feature does not become a nuisance. This
additional revert time is one hour (default) and is also user configurable.
NOTE
Always clean dust and soil away from the LOI screen each time the LOI is
used. Excessive dust can prevent the LOI from entering lockout. This
condition can cause uncommanded operations to occur.
Figure 4-3. ‘Z’ Pattern Entry
LOI Status Codes The LOI display shows a status code in the lower right hand corner of the
display. There are nine status codes to indicate the existing status of the
device during operation. The status code descriptions are shown in Table 4-1.
Table 4-1. LOI Status Codes
37390057
E
Analytical
3
4
1
2
CODE DESCRIPTION
AL Alarm - The device is in a recoverable alarm state.
BL Blowback - A blowback cycle is active.
CA Calibration - A calibration cycle is active.
CV Calibration Verify - A calibration verify task is in progress.
NM Normal - The device is in a normal operating mode.
PO
Power On - A system level initialization sequence is active. This will continue for
several seconds.
SF
System Fault - The device is in a non-recoverable alarm condition. The unit
must be reset or power must be cycled off and on to resume operation.
ST
Stabilize - The device heater control is stabilizing (after warm up). Sensors are
warming up to operating temperature.
WU Warm Up - The device heaters are ramping up to operating temperature.
CZ COe Zero - The COe Zero cycle is active.