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NDIR Gas Analyzer Specifications
Teledyne Analytical Instruments 95
circuiting for 1.5 sec or longer. Auto
calibration initiates when contacts open.
Auto Zero Calibration: Auto zero calibration is carried out
periodically at the preset cycle. This cycle
is independent from “Auto Calibration”
cycle.
When zero calibration gas and solenoid
valve for opening/closing the calibration
gas flow line are installed by the customer,
zero calibration will be carried out at the
set auto zero calibration timing.
Auto Zero Cal Cycle Setting: Auto zero calibration cycle is user settable.
Setting is variable within 1 to 99 hours (in
increments of 1 hour) or 1 to 40 days (in
increments of 1 day).
Gas Flow Time Setting: The timing for flowing zero gas in an auto
zero calibration is user settable from 60 to
900 seconds (in increments of 1 second)
High/Low Limit Alarm: Alarm contact output turns on when
measurement value reaches the preset high
or low limit alarm value. Contacts close
when the instantaneous value of each
channel exceeds the high alarm limit value
or falls below the low alarm limit value.
Instrument Error Contact Output: Contacts turn on when analyzer
error No. 1, 2, 3 or 10 occurs.
Calibration Error Contact Output: Contacts turn on at occurrence of
manual or auto calibration errors from 4-9.
Auto Cal Status Contact Outputs: Contacts turn on during auto
calibration.
O2 Correction: Correction of measured NO, SO
2
and CO
gas concentrations into values at reference
O
2
concentration