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
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