Operation

4.6 Making a Draft / Pressure Measurement

The difference in pressure (∆P) between two areas can be measured by using the analyzer’s two pressure ports and the PRESSURE screen. By using the –∆P port as the reference, the pressure applied to the +∆P port will be displayed on the PRESSURE screen as the differential pressure between the two ports.

Perform a draft / pressure measurement as follows:

1.Turn ON the analyzer and allow it to complete its warm-up cycle (Section 4.2).

TIP: The pressure units of measure is selected per Section 3.7.

2.Display the MAIN MENU by pressing the MENU (F2) button. If necessary, press ESC until MENU appears above F2.

3.Use the buttons to highlight PRESSURE, and then press ENT to display the PRES- SURE screen.

4.Before taking a measurement, the pressure sensor may need to be re-zeroed if it is not already displaying zero with both pressure ports open to the atmosphere. If necessary, zero the pressure sensor as follows:

a.Press the ZERO (F2) button.

MAIN MENU

FUEL

PRESSURE

MEMORY

SETUP

CALIBRATION

DIAGNOSTICS

STATUS

MENU

F1 F2 F3

PRESSURE

Measured: 0.00 inwc

PRINT ZERO SAVE

F1 F2 F3

POWER T-STACK

T-AIR

P

GAS

— ∆P (Pressure

+∆P (Pressure

Reference Port)

Measurement Por

Sampling Hoses with quick connect fittings are available as an optional accessory. Refer to Section 8.2.

Figure 4-1. Draft / Pressure Measurement Hose Connections

Instruction 24-9448

4-7

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Image 41
Bacharach 24-9448 manual Making a Draft / Pressure Measurement, TIP The pressure units of measure is selected per Section

24-9448 specifications

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