Bacharach INSIGHT Benutzerhandbuch
Instruction 24-9460
24
Fyrite
®
INSIGHT
Instruction 24-9460
25
Fyrite
®
INSIGHT
4.6 Making a Draft / Pressure Measurement
The difference in pressure (ΔP) between two areas can be measured by
using the analyzer's two pressure ports and the PRESSURE screen. By
using the -ΔP port as the reference, the pressure applied to the +ΔP 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.
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 select PRESSURE.
Press ENTER to display the Pressure
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:
Press the ZERO (F2) button.
Disconnect any hoses connected to the
+ΔP and -ΔP ports, and then press EN-
TER
TER
to zero the pressure sensor.
Reconnect any hoses. When measuring
draft, leave the -ΔP port open to the at-
mosphere and connect the probe's draft
hose to the +ΔP port.
5. Do one of the following to measure draft or
differential pressure:
To measure draft, insert the probe into
the stack and observe the draft reading
on the PRESSURE screen.
To measure differential pressure, con-
nect two sampling hoses to the +ΔP
and -ΔP ports, and place the open end
of each hose into the areas being mea-
•
•
•
•
•
F1 F2 F3
Atmospheric Burner
or Gravity Vented
Forced Air
or Gravity Vented
Forced Air
80% Eff. Fan Assist
or Power Vented
Furnace/Boiler
or Power Vented
Furnace/Boiler
90% Eff. Condensing
Furnace/Boiler
Atmospheric or
Gravity Vented
Boiler
Gravity Vented
Boiler
Hot Water Tank
Undiluted Flue
Gas Sample Taken
Under Draft
Diverter in Top
Gas Sample Taken
Under Draft
Diverter in Top
of Fire Tube
Fig. 4.1