Initial Application Of Power; Resetting Latched Alarms - General Monitors 580A Instruction Manual

NOTE: If one channel is in fault, and the other is in alarm, the gas reading of the alarmed
channel displays. The error code of the channel in fault is shown after the alarm
condition is removed.
NOTE: If one channel is in fault, and the other channel's gas reading is below alarm
level, the fault error code displays. To see the gas concentration of the working
channel in this case, use Calibration Check mode.
•
The status indicators provide the user with an indication of the current mode of
operation: HIGH (high alarm), LOW (low alarm), FAULT (fault alarm), SETUP
(setup and setup check modes), and CAL (calibration or calibration check
modes).
•
The channel indicators provide the user with the indication of an active channel.
In normal operation mode a steady channel's LED indicates an active channel.
A flashing channel's LED means that the channel has a fault. In Calibration
Check or Calibration mode, the channel's flashing LED shows which channel is
being checked or calibrated.
•
The Mode button provides the user access to the Calibration, Calibration
Check, Setup, and Setup Check modes.
•
The Reset button allows the user to reset latched alarms.
•
The Channel/Select button allows the user to access the desired channel. In
normal mode, if there are no faults, pressing the Channel/Select button causes
the display to show the gas reading of another channel. Releasing the button
restores the highest gas concentration display. The button also allows selecting
a channel for Calibration and Calibration Check mode.
3.2

Initial Application of Power

Before applying power for the first time, double-check all wiring components.
The system has a time delay feature. The High and Low alarm circuits are disabled for
approximately 45 seconds after power is applied. This feature prevents false alarms while
the sensor circuits are stabilizing.
At the initial application of power, the unit will enter a 45-second start-up mode. During
this time, the display will read "SU". The unit then enters operational mode and the
current gas concentration of the sensor displays. If a channel fault occurs, the FAULT
LED will flash, the fault relay will become active and the unit will display the appropriate
error code. This fault indication is independent of the abovementioned time delay feature.
3.3

Resetting Latched Alarms

The user may select a "latching" or "non-latching" alarm output for High and/or Low. If an
alarm output activates and the condition that caused that activation is no longer present,
a non-latching alarm output resets automatically. A latched alarm output must be reset
manually.
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Model 580A