Foss Infratec 1241, Service Manual

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Infratec™ 1241 Grain Analyzer
2:16 Service Manual 1001 5015 / Rev. 4
2.2.12 TWM (Optional)
Test Weight Unit (TWU)
The device which performs the actual weighing of the sample. It consists of the
following basic items;
• A load cell (balance).
• Control electronics PCB. Referred to as the TWM PCB.
• A wiper arm to level of the cuvette.
• Level sensor to detect when the cuvette is full.
• A shutter to allow emptying of the cuvette after measurement.
Fig. 2:14 Test Weight Module
See the Spare Part manual for more detailed information on available spare parts.
Test Weight Module (TWM)
TWM is the terminology used for the entire assembly, including the TWU and
chassis. This module is an optional device that can be fitted to any existing Infratec
1241. To measure the test weight of a sample the used Application model must have
support for the TWM.
The Infratec software (ISW) will during boot-up detect if a TWM is electrically
connected to the instrument.
The TWM is connected to the Infratec through the TWM power/ communication
cable and the drawer sensor cable. The TWM power/ communication cable can be
connected in either of the two optional contacts on the Measuring Unit. The TWM
then receives commands from the ISW. The weight is mathematically converted to a
density and the completed result is presented on the display as a bulk density.
The instrument handles both metric units and imperial units making it possible to
present test weight in both kg/hl and lbs/bu. More information can be found in the
User Manual for Infratec 1241 Modules, p/n 60043623.