Bacharach PCA 400 - Sensor Protection; Dilution Mode

0024-9551 Revision 1
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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 Notications
Dilution Pump Status
Notication
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 notication 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 ( )