Bacharach 67-7622, Инструкция по установке и эксплуатации

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Page 1-10
Bacharach, Inc.
Instructions 67-9319
INTRODUCTION INJECTOR CALIBRATOR CD3
(c) Flowmeter Circuit (Injector Output)
(Figure 1-13)
The flowmeter circuit begins at the discharge head
which receives the injector output. Fluid passes
through a strainer & orifice, and is routed to a
3-way solenoid valve (L8) controlled by a meter
switch mounted on the control panel. When injector
is running, before the switch is actuated, injector
output is returned to the reservoir. When injector
output reading is desired, the switch is actuated,
injector output is routed through the flowmeter
before it is returned to the reservoir. The metering
system uses a patented positive displacement type
flowmeter. Fluid drives a piston in a reciprocating
motion controlled by two 3-way solenoid valves.
Motion of the piston, mechanically connected to a
linear measurement device, produces signals which
represent displaced volume. These signals and
signals generated by camshaft rotation are elec-
tronically computed. Delivery is then digitally
displayed in terms of mm
3
/stroke.
1.5 Calibration Fluid Temperature Control
System (see Chapter 5)
Calibration fluid is supplied at the injector inlet to
104°F. Two 500 watt electric immersion heaters
mounted in the reservoir heat the fluid. Cold water
flowing through a coil of copper tubing mounted in
the reservoir cools the fluid.
Figure 1-12. Injector Supply Circuit