Ecotech Serinus 44 - 3.4.15 Valve Menu

Operation
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Preamp or Optic Diagnostic Mode, this Digital Pot should be
adjusted from 0 to 255. This will produce a change in
the concentration voltage as well as the indicated gas
concentration.
3.4.15 Valve Menu
Main Menu  Service Menu  Diagnostics Menu  Valve Menu
The Valve Menu allows the user to observe the instrument controlled switching of the valves. If the
valve is ON it means the valve is energised. When a three way valve is in the ON state it will now be
in the NC (normally closed) position as shown in the plumbing schematic. When the valve sequencing
is disabled the user has the ability to turn the valve OFF and ON manually. It is recommended that
the valve menu be used by a trained technician following the plumbing schematic (refer to Section
9.5).
Note: When interpreting the information below regarding the flow path through the valve note that
(NC = Normally Closed), (NO = Normally Open) and (C = common).
Valve Sequencing
When Enabled the valves will turn On and Off under the instruments
control (even if you have manually turned Off or On a valve).
When Disabled the valves will change only in response to a user’s
action.
Sample/Cal
Indicates if the Sample/Cal valve on the Calibration Valve Manifold is
Off or On. This will determine the port the instrument draws its
sample from.
Off = Flow from NO to C (drawing sample from the Sample Port).
On = Flow from NC to C (drawing sample from the Calibration Port).
Internal Zero/Cal
Indicates if the Internal Zero/Cal valve on the Calibration Valve
Manifold is Off or On. This will determine the port the instrument
draws its sample from, when selecting Cal. Mode  Zero.
Off = Flow from NO to C (drawing sample from the BGnd Air Port).
On = Flow from NC to C (drawing sample from the Calibration Port).
Pressurised Zero
[optional]
Indicates if the optional pressurised zero port valve is Off or On (refer
to Section 8.2).
Pressurised Span
[optional]
Indicates if the optional pressurised span port valve is Off or On (refer
to Section 8.2).
NO Select
Indicates if the NO Select valve on the Auxiliary Valve Manifold is Off
or On. This valve switches the sample either straight through the NO
flow path to the reaction cell or bypasses out the Exhaust Port.
Off = Flow from C to NO (NO flow path bypassed to Exhaust Port).
On = Flow from C to NC (NO flow path to Reaction Cell).
NOx Select
Indicates if the NOx Select valve on the Auxiliary Valve Manifold is Off
or On. This valve switches the sample either straight through the NOx