Emerson daniel 1500 series, Руководство пользователя

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• The rotor blades or rim buttons passing through the magnetic field of the pickoff
generate a pulsing voltage in the coil of the pickoff assembly. Each voltage pulse
represents a discrete volume. The total number of pulses collected over a period of
time represents the total volume metered.
• The sinusoidal signal from each pickoff has a low amplitude and is not normally
relied upon for transmission distances over 6 meters (20 feet). The signal must,
therefore, be amplified. This is achieved with a preamplifier contained within the
LME that is mounted on the turbine meter.
• These pulse signals are typically transmitted to control room instrumentation, such
as flow computers, and may also be required to transmit to prover computers which
calculate, display, transmit, control or record the flow sensed by the rotor. The
results may be displayed as pulse-counts or standard engineering units, such as
gallons, liters, barrels, etc.
• All Daniel Series 1500 Liquid Turbine Meters have, as standard, the LME which is
fitted with two pickoffs and a dual channel preamplifier.
• The pickoff mountings are oriented so that the outputs from the pickups are 90º
electrically out of phase. The turbine meter may be supplied with two LMEs, offering
up to four pulse outputs. Alternate pairs across the two LMEs are also 90º electrically
out of phase.
• Each turbine meter is precisely flow calibrated before shipment.
1.2.3 Parts lists for the Series 1500 LTM, Nominal Pipe Size
(NPS) 3-24
This section includes the necessary parts required to assemble a standard unit described in
this manual.
Configurations for LME assembly - Standard enclosure , LME assembly - High temperature ,
RME assembly - Pipe mount and RME assembly - Wall mount are shown below.
Introduction
User manual 5