0024-9551
Revision 1
28
PCA
®
400 User Manual
Fig. 3-11:
Pressure Connection Ports
Pressure High Side
(+∆P)
Port
Pressure Low Side
(-∆P)
Port
3.3 Performing Pressure Test
3.3.1 Pressure User Preferences
Pressure Units
Select to display pressure in Inches of Water Column
(inwc)
, Millibar
(mB)
, Pascal
(Pa)
, Hecto-
Pascal
(hPa)
or Millimeters of Water Column
(mmwc)
.
f
To change Pressure Units:
Main Menu
Settings
( )
Pressure Units
select
InchesWater
,
milliBar
,
Pascals
,
HectoPascals
or
mmH
2
0
3.3.2 Pressure Analysis
1. Select Folder / Memory Location
(User Discretion)
The PCA
®
400 gives users the ability to organize their records in a folder structure for later
viewing and downloads.
f
To change Folder / Memory Location:
Main Menu
Memory
( )
use navigation keys
to highlight the desired folder
Options
( )
select
Target
2. Select Measurement Type
f
To select Measurement Type:
Main Menu
Measure
( )
select
Pressure
3. Zero Pressure Sensor
(User Discretion)
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.
f
If necessary, zero the pressure sensor: Press
Zero
( ).
f
Disconnect hoses and press
OK
to zero the pressure sensor.
f
Reconnect hoses. When measuring draft, leave the -∆P port open to the atmosphere
and connect the probe’s draft hose to the + ∆P port.
