Model 3100 Analyzer Instruction Manual
Page 30
Manual file name: MN-A-0005, Rev. C
Manual P/N: C5-06-4900-16-0
level. The Alarm-2 setpoint may be set anywhere from 0 PPM to 1,000,000 PPM (100 %). This setting is
accessed from the Alarm Relay Setup Menu by typing “4” on the RS-232 terminal.
4.1.2.10.5 Alarm-2 Descending
This setting configures Alarm-2 to either ascending or descending trip. Ascending is defined as Alarm-2
active when the oxygen concentration is above the Alarm-2 setpoint level. Descending is defined as;
Alarm-2 active when the oxygen concentration is below the alarm-2 setpoint level. The descending
setting may be set to “YES” or “NO”. This setting is accessed from the Alarm and Relay Setup Menu by
typing “5” on the RS-232 terminal.
4.1.2.10.6 Relay Hold Time
This setting determines the minimum time that Alarm-1 and Alarm-2 relays will hold their active state once
the Alarm-1 and Alarm-2 setpoint levels have been exceeded, regardless of the actual Oxygen
concentration after Alarm-1 and Alarm-2 have been activated. The Hold Time level may be set anywhere
from 0 to 300 seconds. This setting is accessed from the Alarm Relay Setup Menu by typing “6” or “H” on
the RS-232 terminal.
4.1.2.10.7 Fault Relay Active during Warm-up
This setting determines the active status of the Fault relay during the Model 3100 warm-up routine
(section 4.3.1.2). The activate setting may be set to “YES” or “NO”. This setting is accessed from the
Alarm Relay Setup Menu by typing “7” or “W” on the RS-232 terminal.
4.1.2.10.8 Relays Disabled after CAL/Setup
This setting determines the time that relays will be held in their last state before returning to RUN mode
from the control panel or service port user menus. The relays disabled time may be set anywhere from 0
to 14,400 seconds. This setting is accessed from the Alarm Relay Setup Menu by typing “8” or “S” on the
RS-232 terminal.
4.1.2.11 Analog output setup menu (U30)
The RS-232 Analog Output Setup menu U30 (see Figure 30) provides access to all of the settings related
to the Analog Voltage Output (TB3-Pin5, TB3-Pin6) and Analog Current Output (TB3-Pin7, TB3-Pin8). It
is accessed from the Setup Main Menu by typing “3” or “A” on the RS-232 terminal. To go back, use the
<Esc> or “Q” key on the RS-232 terminal. Refer to Figure 9 for terminal block details.
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