Bacharach Fyrite INSIGHT PLUS Manuál s instrukcemi stáhnout pdf (Strana 74)

Operation Fyrite

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INSIGHT

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Plus Manual

68 0024-9487 Rev 2

4.5. Making a Draft or 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.

Step Example Draft or Pressure Measurement Procedure

1 Confirm that testing prerequisites have been completed (see page 61).

2 Display the MAIN MENU by pressing the MENU (F2) button. If necessary,

press ESC until MENU appears above F2.

3 Use the UP () and DOWN () arrow 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 ENTER to zero the pressure sensor.

• Reconnect any hoses. When measuring draft, leave the -ΔP port

open to the atmosphere 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, connect sampling hoses to the +ΔP

and -ΔP ports, and place the ends of the hoses into the two areas

being compared. The differential pressure between the two areas is

now displayed on the PRESSURE screen. If the pressure at the +ΔP

port is higher than the -ΔP port, the pressure reading will be positive.

If it is lower, the reading will be negative.

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Bacharach Fyrite INSIGHT PLUS Manuál s instrukcemi Strana 74