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4.3 ELECTRICAL and GASES SERVICE REQUIREMENTS
4.3.1 ELECTRICAL SERVICE
The electrical service input is located on the rear panel of the control console.
The service input is as follows: 208-240 VAC, 50/60 Hz, Single Phase, 30
Amps.
4.3.2 GASES SERVICE
The inert gas input for the system is on the main gas rotometer located on the
left side wall of the enclosure, above the interchange. The service input is as
follows:
Inert Gas @ 80 PSIG (551 kPa) min. Filtered & regulated supply 3/8 O.D.
tube fitting.
5.0 ENCLOSURE CONTROLS & OPERATION
5.1 ENCLOSURE PRESSURE CONTROL
The MX2000 system is equipped with manual or optional automated control
devices which maintain an inert atmosphere within the work chamber enclosure.
A simplified sequence for utilizing the enclosure includes:
Glovebox Pressure Control-70
Consist of a rotometer on the input, and a purge check valve on the output. The
rotometer can be adjusted between 0-50 SCFH, and the purge check valve will
open when the pressure reaches 1.7 inches of water column or higher.
Increasing the flow of the rotometer creates an increase in pressure causing the
purge check valve to open which in turn purges the enclosure.
Glovebox Pressure Control-73/74
The input consist of a rotometer in parallel with an inlet solenoid valve. The
output consist of an overpressure check valve, a purge on/off valve, a purge
check valve and an overpressure solenoid valve.
The input solenoid valve is controlled by a pressure differential switch which
can be adjusted to maintain a controlled pressure in the enclosure. The pressure
differential switch is adjustable from 0.4-4.0 inches of water column.
The output solenoid valve is controlled by another pressure differential switch
which can also be adjusted to prevent an overpressure condition. This pressure
differential switch is also adjustable from 0.4-4.0 inches of water column.
Purging is done by opening the purge on/off valve on the output side and
increasing the flow of the input rotometer.
