Magnetic Instrumentation 942B, Инструкция по эксплуатации

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I. GENERAL DESCRIPTION
The Model 942B is a high voltage, capacitive discharge-type magnetizer capable of
saturating all alnico, ferrite, and rare earth magnetic materials. The Model 942B is easily
adapted to a wide variety of production and laboratory magnetizing requirements.
Solid state electronic control circuitry makes this magnetizer a highly reliable, low
maintenance unit. The electronic voltage control circuit prevents the unit from being
discharged before the preset energy level has been reached, thereby preventing
incomplete magnetization.
The Model 942B, with all electronic circuitry and capacitors enclosed in the cabinet, is
also designed for maximum operator safety when used with Magnetic Instrumentation,
Inc. Magnetizing Fixtures. An interlock switch is
also mounted withto the panel covering
the connections for the Magnetizing Fixture on the table top. The removal of a
Magnetizing Fixture breaks the incoming power to the control circuits and engages a
safety drain circuit that discharges any energy stored in the capacitor bank .
A
2 terminal twist-lock C HARGEharge I NTERLOCKnterlock socket (Figure 6) is
provided on the side of the chassis containing the Magnetizing Fixture transformer
connections on the table top . This allows for connection of an external interlock switch,
engaged with the closure of ,safety shields , or Magnetizing Fixture covers to be sure they
are properly closed before the operator can charge the capacitors.
The Model 942B Magnetizer is available in four basic models, depending upon the
capacitance of the
- capacitor bank.
Model Capacitance
942B-2 200

F
942B-4 400

F
942B-6 600

F
942B-8 800

F
Any of these models may be operated from either a 115 VAC or 230 VAC power line.
The
power supplyMagnetizer draws a maximum current of 15 Amperes at 115 VAC, and
it charges a 200 µF capacitor bank to 3000 Volts in about 2 seconds. As additional
capacitors are added, the charging time is increased proportionally.
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