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Instruction Manual
IM-105-4000, Rev 1.3
October 2008
Section 4
OVERVIEW
CONTROL UNIT
OPERATIONS
Front Panel LEDs
Fault Messages
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Operation
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 4-1
Control Unit Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . page 4-1
Service Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 4-4
This section describes:
• Operation of the OPM 4000 through the control unit.
• How to make alarm adjustments.
• Various terminal locations.
• How to operate the service module.
The control unit front panel is shown in Figure 4-1 and described below. The
following LED indicators are located on the control unit.
ALARM - Red LED is blinking when a fault is detected. Performing a manual
calibration will cause an alarm condition.
RUN - Green LED is on during normal operation and blinking if system is in
S/M mode. The primary use of S/M mode is to prevent 4-20 mA outputs from
changing while modifying blockware.
OPERATE - Red LED is on during normal operation.
CAL. AUTO/MAN - Red LED is on during calibration check mode.
ZERO - Red LED is on when zero calibration cycle is in progress, off during
span or normal operation.
SPAN - Red LED is on when span calibration cycle is in progress, off during
zero or normal operation.
HIGH OPACITY - Red LED is on if opacity exceeds set point for more than
the time delay (typically 30 seconds).
REM/LOC - Not used.
The following mesages are displayed during a fault condition.
Air purge low - Airflow to the transceiver and/or retro reflector is not
sufficient.
No Stack Power - Indicates loss of service module power or other related
power or component failure from the service module.
T2 4-20 Lost/low - Transceiver 4-20 mA current loop output is out of
specification or missing.
OPM 4000
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