Oval PG30, Инструкция по эксплуатации

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Ins. No.
T-518-11-E
NONCONTACT PULSE GENERATORS
MODEL PG30
/
PG30EP
MODEL PG30
MODEL PG30EP
GB type
Where pulses of scaled units or
unscaled pulses are required
Pulse generator
for totalizer
LW13 type CB type PB type
Meter sizes 52 or 53;
where pulses in scaled
units are required.
If unscaled pulses
uncompensated for
temperature are re-
quired, it is mounted to
the area encircled ( ○ )
of transmission gear
box GB.
Equipped with regis-
ter Model LW11;where
pulses of scaled units
compensated for tem-
perature are required.
Equipped with regis-
ter Model LW42 or
43;where pulses of
scaled units com-
pensated for tem-
perature are required.
Pulse generator
for totalizer
■
GENERAL
When used in conjunction with an OVAL flowmeter, the Model PG0/
PG0EP noncontact pulse generator provides voltage frequency pulses
proportional to the flowrate of process fluid. Incorporated in the pulse
generator are a premolded pulse generating element and a circuit
which prevents false pulses otherwise generated by minute vibration
of generator components. As the toothed disk rotates, a succession of
voltage pulses (quasi rectangular wave) is generated.
Generated pulses come either pulses in scaled units or unscaled
pulses, depending on the position of flowmeter at which the generator
is mounted. Pulses in scaled units can be used in remote totalizing,
batching, blending systems and the like built around an OVAL flowmeter
which serves as the sensing terminal. Unscaled pulses are converted
into an analog signal for use in flow indicator/recorder/controller
applications. Models PG0S/PG0SEP are compatible in the latter
applications.
★ For complete details of Models PG0S/PG0SEP,see OVAL Products
General Specifications GS No T-5-E.
Pulse generators come in the following two designs:
(1)Standard type …… PG0
()Flameproof type … PG0EP (designed and fabricated according to the "Explosionproof Guide-
lines" recommended by the Technology Institution of Industrial Safety.)
★ Information about Models PG30S and PG30SEP appears in Instruction Manual No. T-523-E.
■
PULSE GENERATOR INSTALLATION EXAMPLES
Generated pulses in scaled units … The rotor revolution is guided into gear reduction and instrumental
error correction stages for the flowmeter to produce pulses of required scaled unit. The obtained pulse
signal is used primarily for remote totalization.