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Test Rigs

Test Rigs

Tru-Test Electronic Milk Meter (EMM) Calibration Rig

Equipment required:

Tru-Test Calibration Rig, MMA00064
Potassium iodide and Kodak photoflo
Distilled water

Principle:

During milking of each cow the Tru-Test EMM separates a known and accurate portion of the cow's milk and collects that small portion of milk in the flask. The Milk Meter then measures how much milk is held in the flask by measuring the height to which milk has collected in the flask. Each Milk Meter is programmed with a calibration curve, which is used to convert height of milk in the flask to a known volume in the flask.

The calibration curve is specific to each Milk Meter. Components such as the circuit board and flask components cannot be freely replaced or swapped without risking loss of accuracy.

Tru-Test Electronic Milk Meter (EMM) Mega Test Rig

Equipment required:

Tru-Test MTR, MMA00065
Potassium iodide and Kodak photoflo
Distilled water

Principle:

The Mega Test rig (MTR) is used to check and then calibrate the complete Milk Meter assembly. The proportion of milk getting into the flask (sample ratio) can vary very slightly from EMM to EMM. The MTR allows the calculation of a unique factor for each Milk Meter.

Functionality check

Before a Milk Meter can be calibrated, it must be ascertained that it is functioning correctly. Hence the MTR will check: Motor speed, EMM stir air admission, Barcode reading function, and Sample size. The MTR will also prompt the operator to look for possible leaks in the EMM as these will affect the meter’s accuracy.

Tru-Test Electronic Milk Meter (EMM) Test Rig and Servicing Overview.pdf

Fast Flow Test Rig

Equipment required:

Tru-Test Fast Flow Water Test Rig (MMA00057 or MMA00058)
Clean water

Principle:

The Fast Flow test rig works by drawing a measured amount of water through the Milk Meter. The Milk Meter will pass or fail depending on the results of the test. If a meter fails, disassemble and check it, then reassemble and test it again.