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Instruction 24-9448 4-7
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.
PRESSURE
Measured:
0.00 inwc
PRINT ZERO SAVE
F1 F2 F3
MAIN MENU
FUEL
PRESSURE
MEMORY
SETUP
CALIBRATION
DIAGNOSTICS
STATUS
F1 F2 F3
MENU
POWER
P
T-STACK T-AIR
GAS
— ∆P (Pressure
Reference Port)
+∆P (Pressure
Measurement Port)
Sampling Hoses with quick
connect ttings are available
as an optional accessory.
Refer to Section 8.2.
Figure 4-1. Draft / Pressure Measurement Hose Connections