Teledyne 4040 - Methane / Nonmethane analyzer User Manual
Page 60
Operation Series
4040
60 Teledyne
Analytical
Instruments
Pressing
The first pass in the NMH mode only purges the sample gas from the
column (no span calculation is performed this time around). Then the
CH4 is span calibrated followed by the second pass of the NMH mode,
where the span calculation is performed.
4.13 The Alarms Function
The Model 4040 is equipped with two alarms and a system failure
alarm relay. Each alarm relay has a set of form "C" contacts rated for 3
amperes resistive load at 250 VAC. See Figure in Chapter 3, Installation
and/or the Interconnection Diagram included at the back of this manual
for relay terminal connections. The alarm relay contacts are accessible to
the user from the 50-pin Equipment Interface connector.
The system failure alarm has a fixed configuration described in
Chapter 3 Installation.
The concentration alarms can be configured from the ALARM
function screen as follows:
________________________________________________
-> AL-1 DEFEATED
AL-1 HIGH
AL-1 NON-FAILSAFE
AL-1 NON-LATCHING
AL-1 20.00 ppb
AL-1 SOURCE CH4
AL-2 ACTIVE
AL-2 LOW
AL-2 FAILSAFE
AL-2 LATCHING
AL-2 50.00 ppb
AL-2 SOURCE CH4
________________________________________________
Note: For the purpose of example, Alarm 2 has been set differently
than Alarm 1.)
Note: An alarm in 'alarm condition' is signaling that action must be
taken such as correcting the alarm or the analysis