Bacharach Flue-Gas Sample Conditioning System Dokumentacja Pobierz pdf (Strona 35)

ECA 450 Operation

Instruction 0024-9400

2.15 Differential Pressure Measurement

To measure the differential pressure between two confined areas, do the

following:

1. Press PRESSURE key to display the Pressure screen.

««««««PRESSURE««««««

n.nn xxxx

Where: n.nn = current pressure reading

xxxx = pressure units (refer to Section 2.17.2)

2. If desired, the pressure sensor can be zeroed as described below. To skip

the zeroing procedure, proceed to Step 3.

a) With Pressure screen displayed, again press PRESSURE key to

display the Pressure Zero screen.

Pressure Zero

Disconnect Hose

Then Press ENTER

b) Disconnect all hoses from the ∆P REF and PRESSURE connectors.

This step ensures that both of these connectors are sampling the same

pressure.

c) Press ENTER to zero pressure sensor to atmospheric pressure; after

which, reconnect probe hose that was removed in Step 3b.

Reconnect Hose

3. Connect pressure hose assembly P/N 0024-1103 to analyzer’s ∆P REF

connector (see Figure 1-1). Then insert open end of this hose into area

being used as the reference pressure.

4. Insert probe into area whose pressure is to be measured.

5. The Pressure screen is now displaying the differential pressure between

the two areas. Positive readings indicate that the pressure of the area

being measured is higher than the reference area, while negative

readings indicate the pressure is lower than the reference.

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Bacharach Flue-Gas Sample Conditioning System Dokumentacja Strona 35