Instruction Manual Model 3100 Analyzer
Manual P/N: C5-06-4900-16-0
Manual file name: MN-A-0005, Rev. C
Page 29
by typing “2” or “R” on the RS-232 Terminal. To go back, use the <Esc> or “Q” key on the RS-232
terminal.
4.1.2.10.1 Alarm-1 and Alarm-2 relays fail-safe
This parameter allows the user to set the Alarm-1 and Alarm-2 relays to either fail-safe or non-fail-safe
action. Failsafe action is defined as; relay coils are not powered (contacts are in normal position) in
active alarm state. Non-fail-safe action is defined as; relay coils are powered (contacts are in non-normal
position) in active alarm state. The Alarm-1 and Alarm-2 Relays Failsafe setting may be set to “YES” or
“NO”. This setting is accessed from the Alarm and Relay Setup Menu by typing “1” or “F” on the RS-232
terminal.
4.1.2.10.2 Alarm-1 Level setting (setpoint)
This setting sets the threshold level for Alarm-1. Depending on whether or not it is set to ascending or
descending, Alarm-1 becomes active when the oxygen concentration is above or below this threshold
level. The Alarm-1 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 “2” on the RS-232 terminal.
4.1.2.10.3 Alarm-1 Descending
This setting configures Alarm-1 to either ascending or descending trip. Ascending is defined as Alarm-1
active when the oxygen concentration is above the Alarm-1 setpoint level. Descending is defined as;
Alarm-1 active when the oxygen concentration is below the alarm-1 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 “3” on the RS-232 terminal.
4.1.2.10.4 Alarm-2 Level setting (setpoint)
This setting sets the threshold level for Alarm-2. Depending on whether or not it is set to ascending or
descending, Alarm-2 becomes active when the oxygen concentration is above or below this threshold
Fig. 29, Relay configuration menu
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