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7. APPENDIX
Page 133 © 2007 DH Instruments, a Fluke Company
7
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A
A
P
P
P
P
E
E
N
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D
D
I
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X
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7.1 UNIT CONVERSION
7.1.1 PRESSURE
RPM4 performs all internal calculations in SI units. Numerical values input or output in other units
are converted to SI immediately after entry and back to other units just before output as needed.
Table 28 provides the conversion coefficients used by RPM4 to convert numerical values
expressed in SI units to corresponding values expressed in other units.
Table 29. Pressure unit of measure conversion coefficients
TO CONVERT FROM Pa To MULTIPLY BY
Pa
Pascal
1.0
mbar
millibar
1.0 E-02
hPa
hecto Pascal
1.0 E-02
kPa
kilo Pascal
1.0 E-03
bar
Bar
1.0 E-05
mmWa @ 4°C
millimeter of water
1.019716 E-01
mmHg @ 0°C
millimeter of mercury
7.50063 E-03
psi
pound per square inch
1.450377 E-04
psf
pound per square foot
1.007206 E-06
inWa @ 4°C
inch of water
4.014649 E-03
inWa @ 20°C
inch of water
4.021732 E-03
inWa @ 60°F
inch of water
4.018429 E-03
inHg @ 0°C
inch of mercury
2.953 E-04
kcm
2
kilogram force per centimeter square
1.019716 E-05
user
User
User defined coefficient