Table 19.1 Units used in the documentation
Unit Name Measures US unit US name Conversion Alternative units
A ampere Current
bar bar Pressure psi
pounds per square
inch
1 bar = 14.5 psi
1 bar = 0.980665
atmosphere (atm)
1 bar = 100,000
Pascal (Pa)
ºC degrees Celsius Temperature ºF Fahrenheit
T[ºC] = (T[ºF] - 32 º) × 5 /
9
T[ºC] = T[Kelvin (K)]
- 273.15
dB decibel
Noise or interference
(a logarithmic scale)
g gram Weight oz ounce 1 g = 0.03527 oz
g gravitational force Gravity, g = 9.8 m/s
2
ft/s
2
g = 32.2 ft/s
2
h hour Time
Hz hertz
Frequency (cycles per
second)
kg kilogram Weight lb pound 1 kg = 2.205 lb
kPa kilopascal Pressure psi
pounds per square
inch
1 kPa = 0.145 psi
m metre Length ft foot (or feet) 1 m = 3.28 ft
mA milliampere Current
min minute Time
mm millimetre Length in inch 1 mm = 0.0394 in
ms millisecond Time
N·m newton metre Torque lb-in pound-force inch 1 N·m = 8.85 lb-in
RPM
revolutions per
minute
Frequency of rotation
(rotational speed)
s second Time
V volt Voltage
V AC
volt (alternating
current)
Voltage (alternating
current)
V DC volt (direct current)
Voltage (direct
current)
W watt Power
Ω ohm Resistance
19.3 Symbols
19.3.1 Symbols for notes
Safety notes
DANGER!
This highlights dangerous situations. If the guidelines are not followed, these situations could result in death, serious
personal injury, and equipment damage or destruction.
DESIGNER'S HANDBOOK 4189340911K UK Page 507 of 521
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