Oval EX DELTA II, Инструкция по эксплуатации

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D-583-2N-E
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3. GENERAL
Battery-powered, the EX DELTA Ⅱ is designed to serve as a designated local monitor at the point of
measurement and finds extensive use in a wide range of applications with many benefits inherent in the vortex
flowmeter. It requires no external power source.
The display shows the total flow and instantaneous flowrate at the touch of an external switch.
Also available is a separately mounted type which permits centralized monitoring of multiple displays from
widely spread sensors in the field - some may be 200 meters away.
Depending on the way the probe is installed in the main pipe, two types are available: fixed and hottap.
Features
(1) A broad flow range with high metering accuracy.
(2) Accepts gas, liquid and steam.
(3) The probe has neither mechanically moving parts nor components subject to wear. Completely isolated
from the process fluid the sensor is compatible with dust and mist. All these contribute to long life.
(4) The hottap type is suitable for installation in critical lines where the process flow must be maintained -
without interruption during maintenance and inspection. It also reduces initial cost by eliminating the need
for a bypass line.
(5) Battery powered, the preamplifier requires no external power installation (five 3.6 volt lithium batteries are
used). The battery pack is good for 7 years on a 24 hour continuous operation (with integrally mounted
preamplifier) or 4 years (with separately mounted preamplifier).
(6) Can monitor total flow (accumulated total, resettable total) and instantaneous flowrate on the digital display.
(7) Constructed waterproof (IP65) and intrinsically safe (Exial II CT4) ideal as a designated local monitor.
(8) A model with separately mounted preamplifier enables the operator to monitor multiple sensors in a
remotely located central monitor station.
Transmission length: 200 meters max.
4. COMPONENT NAMES AND FUNCTIONS
4.1 Component Parts
Refer to Figs. 4. and 4.2 on the next page.
() Meter Body (probe):
Consists of a measuring pipe and a vortex shedding body bluff body). As the metered material flows, von
Karman vortices form and shed behind the bluff body.
(2) Sensor (vortex sensing element):
Has a built-in piezoelectric sensor. All wetted parts are made of stainless steel for maximum life expectancy.
(3) Adapter (shaft assembly):
Connects the meter body with the preamplifier. To be installed on the pipeline with a flange. Also serves to
protect the sensor and dissipate heat.
(4) Preamplifier:
Transforms changes in electric charges generated from the sensor into an output signal representing the
flowrate. Consists of interface, amplifier, output, and display boards.
Physical orientation of the preamplifier is adjustable in steps of 90 deg. around the adapter axis (see Sec. 6.10
on page 18). The display is also adjustable in steps of 90 deg. within the preamplifier housing.