Sierra 241-VTP, 240-VTP instruction manual K L

Appendix B GlossarySeries 24-HP Instruction Manual

I J K L

In-Line Flow Meter	A flow meter which includes a short section of piping
	which is put in-line with the user’s piping.
Insertion Flow Meter	A flow meter which is inserted into a hole in the
	user’s pipeline.
Joule	A unit of energy equal to one watt for one second.
	Also equal to a Newton-meter.
LCD	Liquid crystal display.

M N O P

m	Mass flow rate.
mA	Milli-amp, one thousandth of an ampere of current.
∝	Viscosity, a measure of a fluid’s resistance to shear stress.
	Honey has high viscosity, alcohol has low viscosity.
ΔP	Permanent pressure loss.
P	Line pressure (psia or bar absolute).
ρ act	The density of a fluid at the actual temperature and
	pressure operating conditions.
ρ std	The density of a fluid at standard conditions (usually
	14.7 psia and 20°C).
Permanent	Unrecoverable drop in pressure.
Pressure Loss
Piezoelectric Crystal	A material which generates an electrical charge
	when the material is put under stress.
PRTD	An resistance temperature detector (RTD) with plati-
	num as its element. Used because of high stability.
psia	Pounds per square inch absolute
	(equals psig + atmospheric pressure). Atmospheric
	pressure is typically 14.696 psi at sea level.
psig	Pounds per square inch gauge.
PV	Liquid vapor pressure at flowing conditions (psia or
	bar absolute).

B-2 IM-24-HP