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Automated Pressure Calibrator
Measurement Setup
45
Atmosphere
Select the barometric reference or manually enter a barometric value from an
outside source from the Atmosphere menu (>Measure
Setup>Atmosphere). If a barometer module is installed, the Product
automatically selects it as the default barometric reference. To change the
barometric reference, select the module and unit from the Atmosphere menu.
Head Height
For calibration of a UUT at a different height than the Product, the user must
make a head-height correction. The head-height correction is the vertical
difference between the reference plane of the UUT to the center of the PMMs
while installed in the Product in inches, millimeters, or centimeters.
See Figure 13.
After the user makes the measurement, the user enters that value into the
Product. Select ABOVE if the UUT is above the Product and select BELOW if
the UUT is below the Product.
Note
Failure to make a head-height correction can result in an inaccurate
pressure measurement.
V
E
NT
CO
N
T
RO
L
MEA
SUR
E
mA
V
DC
H
AR
T
7
8
9
4
5
6
1
2
3
0
LOC
K
S
A
VE
U
N
LO
C
K
BA
CK
CLEA
R
E
NT
R
Y
E
NTER
S
ET
U
P
S
ET
PO
INT
F5F4
F3F2
F1
300
400
psi
500
600
200
100
0
hwr004.eps
Figure 13. Head-Height Correction Measurement
1.888.610.7664 sales@GlobalTestSupply.com
Fluke-Direct.com
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