NS 5.14 Firmware
2–44 4900002262 rev. B 3-23-21
Assignable alarm
The functionality of the Assignable Alarm is determined by the DO Alarm
Setup parameter set in Mode 2 according to Table 2–3 on page 2–22. For
example, the Assignable Alarm can be configured as a Concentra High
Alarm or Concentra Low Alarm that is triggered when the measured
concentration is above or below, respectively, the level set in Mode 2. A high
concentration causes the Assignable Alarm relays to be activated and the
message “Concentration High” displays on the LCD screen.
Validating the Analyzer
Validation of the analyzer using an appropriate gas standard is automatically
conducted at each Val Interval period at the Val Start Time, semi-
automatically when initiated via the Validation DI or the Start Validation
parameter, or manually by accessing Mode 7 or Mode 8.
Tovalidateautomatically
1. Verify that the validation gas source(s) has been properly installed
and/or connected.
2. If necessary, set the current time, date, desired validation hour and
validation interval (see “To change parameters in Mode 2” on
page 2-15).
3. Set the Daily Validation parameter to 1. The analyzer should run
a validation cycle for the number of days and hour set by Val
Interval and the Val Start Time parameter.
Tovalidatesemi‐automatically
1. Verify that the validation gas source(s) has been properly installed
and/or connected.
2. Initiate a validation cycle by closing the contacts connected to the
Validation DI input or by setting the Start Validation parameter
to 1.
Tovalidatemanually
1. Verify that the validation gas source(s) has been properly installed
and/or connected.
2. Initiate validation measurements by pressing the # key followed by
the 7 key (Mode 7) or the # key followed by the 8 key (Mode 8)
for a dual validation system.
3. Once validation measurements are complete, press the # key
followed by the 1 key (Mode 1) to return to Normal Mode and stop
the validation.
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