Magnetic Stirrer Assembly - Micromeritics SediGraph III 5120 Service Manual

Fluid module
There are four chambers available.
• 511/25870/00 (standard chamber) is an aluminum large bore chamber.
• 511/25870/02 is a stainless steel large bore chamber used when high pH levels or caustic
materials are present.
• 511/25875/00 is an aluminum small bore chamber.
• 511/25875/02 is a stainless steel small bore chamber used when high pH levels or
caustic materials are present.
A cable assembly (PN 510/60817/00) is embedded in the wall of each type of mixing chamber.
This cable has two heater cartridges and an RTD. The cable is the only serviceable part of the
mixing chamber.
There are future plans to offer an optional module which will act like the older predecessor to
the 5100. A module with one pump is planned in the future (like a 5000 manually-operated
instrument). The 5120 will see this due to two bits being used in the cable to decode which
type of chamber is present.

Magnetic Stirrer Assembly

A magnetic stirrer assembly (PN 512/34005/00) is located directly beneath the mixing
chamber. It includes a stepper motor with a magnet attached to the output shaft. This assembly
stirs the fluid to keep particles from settling during an analysis.
There is an interconnect PCB (PN 512/17709/011) located directly behind the stirrer assembly
that allows connection of the mixer chamber, magnetic stirrer, all valves, and pump motors at
the back side of the magnetic stirrer mechanism. These signals pass through this PCB with no
manipulation.
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SediGraph III 5120 Service
Mar 2010