Maintenance
5.20
HART
®
Special Units
VARIABLE CODE
UNIT
DESCRIPTION
PRESSURE
1
inH
2
O (68ºF)
inches of water at 68 degrees F
2
inHg (0ºC)
inches of mercury at 0 degrees C
3
ftH
2
O (68ºF)
feet of water at 68 degrees F
4
mmH
2
O
(68ºF)
millimeters of water at 68 degrees F
5
mmHg (0ºC) millimeters of mercury at 0 degrees
C
6
lb/in
pounds per square inch
7
bar
bars
8
mbar
millibars
9
gf/cm
Gram force per square centimeter
10
kgf/cm
Kilogram force per square centimeter
11
Pa
pascals
12
kPa
kilopascals
13
torr
torr
14
atm
atmospheres
145
inH
O (60ºF)
inches of water at 60 degrees F
237
MPa
megapascals
238
inH
O (4ºC)
inches of water at 4 degrees C
239
mmH
O (4ºC)
millimeters of water at 4 degrees C
VOLUMETRIC
F
LOW
15
CFM
cubic feet per minute
16
GPM
gallons per minute
17
l/min
liters per minute
18
ImpGal/min
imperial gallons per minute
19
m³/h
cubic meters per hour
22
gal/s
gallons per second
23
Mgal/d
million gallons per day
24
l/s
liters per second
25
Ml/d
million liters per day
26
ft³/s
cubic feet per second
27
ft³/d
cubic feet per day
28
m³/s
cubic meters per second
29
m³/d
cubic meters per day
30
ImpGal/h
imperial gallons per hour
31
ImpGal/d
imperial gallons per day
121
Nm³/h
normal cubic meters per hour
122
Nl/h
normal liters per hour
123
ft³/min
standard cubic feet per minute
130
CFH
cubic feet per hour
131
m³/h
cubic meters per hour
132
bbl/s
barrels per second
133
bbl/min
barrels per minute
134
bbl/h
barrels per hour
135
bbl/d
barrels per day
136
gal/h
gallons per hour
137
ImpGal/s
imperial gallons per second
138
l/h
liters per hour
235
gal/d
gallons per day
VARIABLE CODE
UNIT
DESCRIPTION
VELOCITY
20
ft/s
feet per second
21
m/s
meters per second
114
in/s
inches per second
115
in/min
inches per minute
116
ft/min
feet per minute
120
m/h
meters per hour
TEMPERATURE
32
ºC
degrees Celsius
33
ºF
degrees Fahrenheit
34
ºR
degrees Rankine
35
K
degrees Kelvin
ELECTRO
MAGNETIC FORCE
36
mV
millivolts
58
V
volts
ELECTRIC
RESISTANCE
37
ohm
ohms
163
kohm
kilo ohms
ELECTRIC
CURRENT
39
mA
milliamperes
VOLUME
40
gal
gallons
41
l
liters
42
ImpGal
imperial gallons
43
m
cubic meters
46
bbl
barrels
110
bushel
bushels
111
yd³
cubic yards
112
ft³
cubic feet
113
in³
cubic inches
124
bbl(liq)
liquid barrels
166
Nm³
normal cubic meter
167
Nl
normal liter
168
SCF
standard cubic feet
236
hl
hectoliters
LENGTH
44
ft
feet
45
m
meters
47
in
inches
48
cm
centimeters
49
mm
millimeters
151
ftin
feet in sixteenths
TIME
50
min
minutes
51
s
seconds
52
h
hours
53
d
days
MASS
60
g
grams
61
kg
kilograms
62
t
metric tons
63
lb
pounds
64
Shton
short tons (2000 pounds)
65
Lton
long tons (2240 pounds)
125
oz
ounce