Full Product Manual

TP-7092 4/23 89
N, norm.
normal (power source)
PMG
permanent magnet generator
SCR
silicon controlled rectifier
(electrical), selective catalytic
reduction (exhaust emissions)
NA
not available, not applicable
pot
potentiometer, potential
s, sec.
second
nat. gas
natural gas
ppm
parts per million
SI
Systeme international d’unites,
International System of Units
NBS
National Bureau of Standards
PROM
programmable read-only
memory
SI/EO
side in/end out
NC
normally closed
psi
pounds per square inch
sil.
Silencer
NEC
National Electrical Code
psig
pounds per square inch gauge
SMTP
simple mail transfer protocol
NEMA
National Electrical
Manufacturers Association
pt.
pint
SN
serial number
NiCd
nickel cadmium
PTC
positive temperature coefficient
SNMP
simple network management
protocol
NFPA
National Fire Protection
Association
PTO
power takeoff
SPDT
single-pole, double-throw
Nm
newton meter
PVC
polyvinyl chloride
SPST
single-pole, single-throw
NO
normally open
PVC
polyvinyl chloride
spec
specification
no., nos.
number, numbers
PWM
pulse width modulated, pulse
width modulation
specs
specification(s)
NPS
National Pipe, Straight
qt.
quart, quarts
sq.
square
NPSC
National Pipe, Straight-coupling
qty.
quantity
sq. cm
square centimeter
NPT
National Standard taper pipe
thread per general use
R
replacement (emergency)
power source
sq. in.
square inch
NPTF
National Pipe, Taper-Fine
rad.
radiator, radius
SMS
short message service
NR
not required, normal relay
RAM
random access memory
SS
stainless steel
Ns
nanosecond
RDO
relay driver output
std.
standard
OC
overcrank
ref.
reference
stl.
Steel
OD
outside diameter
rem.
Remote
tach.
Tachometer
OEM
original equipment
manufacturer
Res/Co
ml
Residential/Commercial
TB
terminal block
OF
overfrequency
RFI
radio frequency interference
TCP
transmission control protocol
opt.
option, optional
RH
round head
TD
time delay
OS
oversize, overspeed
RHM
round head machine (screw)
TDC
top dead center
OSHA
Occupational Safety and Health
Administration
rly.
Relay
TDEC
time delay engine cooldown
OSHPD
Office of Statewide Health
Planning and Development
(California)
rms
root mean square
TDEN
time delay emergency to
normal
OV
overvoltage
rnd.
Round
TDES
time delay engine start
oz.
ounce
RO
read only
TDNE
time delay normal to
emergency
p., pp.
page, pages
ROM
read only memory
TDOE
time delay off to emergency
PC
personal computer
rot.
rotate, rotating
TDON
time delay off to normal
PCB
printed circuit board
rpm
revolutions per minute
temp.
temperature
pF
picofarad
RS
right side
term.
Terminal
PF
power factor
RTDs
resistance temperature
detectors
THD
total harmonic distortion
ph., ø
phase
RTU
remote terminal unit
TIF
telephone influence factor
PHC
Phillips
®
head Crimptiter
(screw)
RTV
room temperature vulcanization
tol.
Tolerance
PHH
Phillips
®
hex head (screw)
RW
read/write
turbo.
Turbocharger
PHM
pan head machine (screw)
SAE
Society of Automotive
Engineers
typ.
typical (same in multiple
locations)
PLC
programmable logic control
scfm
standard cubic feet per minute
UF
underfrequency