Equipment Description SediGraph III 5120 Installation
4 Mar 2010
MasterTech 052 (optional)
The MasterTech 052, an automatic sampling device that operates in conjunction with the
SediGraph III 5120, is also available. The MasterTech allows you to “queue up” as many as 18
predispersed samples to run consecutively and unattended. It allows samples to be redispersed
either by stirring only or by stirring and disruption with an ultrasonic probe. The MasterTech
transfers each sample to the SediGraph, then after analysis is complete, rinses the mixing
chamber, the connecting tubing, and the stirrer.
The MasterTech 052 consists of three main components:
• arm assembly
• body
• beaker tray
The arm assembly controls the movement of the stirring rotor, the ultrasonic probe, and the
transfer tube. The body houses the electronics, the transfer pump, the front panel controls, and
supports the beaker tray, which holds up to 18 sample beakers. During operation, the beaker
tray is loaded with beakers containing 60 to 80 mL of predispersed sample. When the
SediGraph is ready for a sample, the tray rotates until the correct sample is underneath the
head of the arm assembly. The head then lowers until it rests on top of the beaker. Stirring
action begins and continues for a user-specified length of time. If desired, the ultrasonic probe
can be activated to aid in redispersion. When redispersion is complete, the pump transfers
most of the sample to the SediGraph, where it is loaded into the mixing chamber. Analysis
now proceeds as if you had filled the mixing chamber manually with predispersed sample.
When analysis is complete, the contents of the mixing chamber are disposed to the waste
container.
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