Ecotech Serinus 40 - 3.5.17 Valve Menu

Serinus 40 User Manual 2.2
Page 54
3.5.17 Valve Menu
The Valve Menu allows the user to observe the opening and closing of valves as well as providing the
ability to open and close them manually.
Valve Sequencing
When Enabled the instruments valves will open and close under
microprocessor control. When Disabled the valves will change only
in response to manual controls.
Manually changing a valve while sequencing is enabled does not
prevent the microprocessor from changing it again.
Valve sequencing will remain off unless the instrument has
returned to main screen for longer than 2 minutes.
NO
x
Select
Shows the current operation of the NO
x
select valve. This valve
switches the NO
2
to NO converter sample to flow either through
to the cell, or to bypass the sample out of the exhaust port of the
instrument.
Open = sample via NO
2
converter.
Closed = bypass NO
2
converter sample out of instrument.
NO Select
Shows the current operation of the NO select valve. This valve
switches the sample either straight through to the cell, or
bypasses the sample out the exhaust port of the instrument.
Selecting Switch will change the valve to the alternative state
(Open = sample via sample port only, Closed = sample port via
NO
2
converter).
Measure/Background
Shows the current operation of the background select valve. This
valve determines whether the sample is pre-reacted with ozone
before arriving at the cell. This creates no reaction in the cell and
enables a cell ‘Background’ measurement to be taken. Selecting
Switch will change the valve to the alternative state (Closed =
sample as per normal, Open = react sample before cell).
Sample/Cal
Shows the action of the valve that determines whether sample gas
or calibration gas/internal zero air is being sampled (Open =
Span/Zero, Closed = Sample Gas).
Internal Zero/Cal
Shows the action of the valve that determines whether the
instrument calibration gas is taken from the Calibration Port or the
Internal Zero (Closed = Internal Zero, Open = Calibration Port).
Pressurised Span (optional)
Shows the action of the valve that determines whether the
instrument calibration gas is taken from the optional Pressurised
Span Port (refer to Section 5.7).
Pressurised Zero (optional)
Shows the action of the valve that determines whether the
instrument calibration gas is taken from the optional Pressurised
Zero Port (refer to Section 5.7).