0024-9551
Revision 1
41
PCA
®
400 User Manual
IMPORTANT
:
Dilution Mode will run until ALL MEASUREMENTS fall below 80% of
the set dillution threshold(s).
Combustion Test
NGAS
Acme Powerplant
Dilution Mode Enabled
Fig. 4-7:
Dilution Mode Notifications
Dilution Pump Status
Notification
IMPORTANT
:
If not already present, the following should be installed to ensure
accurate measurement while the analyzer is in Dilution Mode:
•
Gaskets
(P/N: 0024-1745)
in all vents in the analyzer’s component door.
• Vinyl Caps
(P/N: 0005-4766)
plugging vents where sensors are not present.
4.14 Sensor Protection / Dilution Mode
Sensor Protection / Dilution Mode allows the instrument to dillute the gas sample in order
to protect its sensors from over-ranging during combustion analysis.
Enabling Sensor Protection
Sensor Protection allows the PCA
®
400 to engage a second pump, diluting the sample
(and
all measurements)
with fresh air. A notification will alert the user that the dilution pump has
been engaged , as well as a second pump icon ( ). Any print-outs / reports will also note
that the analyzer was diluting measurements during analysis.
f
To enable Sensor Protection / Dilution Mode:
Options
( )
Sensor Protection
select
desired gases
(CO, NO, NO
2
, SO
2
)
and dillution threshold
(50%, 75% or 100% of Sensor
Range)
press
Save
( )