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HAPSITE Smart Operating Manual
Chapter 14
Service Module
14.1 Introduction
The Service Module (also called the SM) provides several support functions for the
HAPSITE. The Service Module contains pumps that create a vacuum system for
the HAPSITE manifold, both during GC/MS operation in the lab and NEG Pump
activation. This vacuum system comprises a Service Module Manifold, two vacuum
pumps in series connected by a foreline, a Manifold Vent Valve, Foreline Vent
Valve, and controllers to operate and monitor the pumping operations. The Vacuum
Interconnect Valve is physically opened and closed from the Service Module.
A 24 V(dc) power supply in the Service Module provides the HAPSITE with power.
The Service Module also contains backup batteries to provide a controlled
shutdown of the Service Module if power is lost.
The Service Module operates using two separate, but connected, pumps. These
two pumps are called the Roughing pump and Turbo pump.
The Roughing pump has a two or four stage design, depending on the version. The
newer version of the Rouging pump has four stages. Each stage of the Roughing
pump has a rubber diaphragm which is pushed against a smooth plate several
times a second in order to remove air through small holes in the plate. The
Roughing pump is sometimes referred to as a Diaphragm pump.
The Roughing pump works in series with the Turbo pump to create a vacuum
(typically about 1e-03 to 3e-03 Pa pressure) which is suitable for operating the
HAPSITE Mass Spectrometer.
The Turbo pump has a set of precision balanced blades which rotate at
approximately 1,500 Hz (1,500 revolutions/second), or 90,000 RPM.
CAUTION
Because of the rotational speed of this set of blades, the
Service Module should not be moved while operating.
Service Modules are available in either 110/220 V(ac) (IPN 930-202-G1) or
24 V(dc) (IPN 930-202-G3) power models. Both models perform all the same
functions. The only difference is that the 110/220 V(ac) model operates off from line
voltage, while the 24 V(dc) model operates with input power from a 24 V(dc) power
supply.
Summary of Contents for HAPSITE Smart
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