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   Doc's Corner Article 110-E   

Digimet Accessories

Pulsation Voltage Test

The Pulsation Voltage Test is for determining voltage at the pulsation control box and at electrical contact point of pulsators. This test should be performed at routine intervals - monthly at a minimum

Equipment required:

1. Digimet
2. Voltage testing leads (provided with Digimet)

Testing procedure:

1. Check the DC Voltage output at pulsation control box.
-- Make certain to apply probes to smaller electrical wires from transformer going into parlor.
-- One test lead should go to ground and the other test lead should go to the hot wire on both sides of the ground wire - check both sides.
-- The normal DC Voltage range at the control box is 22 to 24 DC Volts.
2. Check the first pulsator from first pulsation control box, testing both sides of the pulsator - left hot and ground and right hot and ground. The normal DC Voltage range is 22 to 24 DC Volts.
3. Repeat the same process on last pulsator of the run from first pulsation control box. The normal DC Voltage range should be 19 to 20 DC Volts.
4. Repeat the same procedure on any additional pulsation control boxes.
5. All pulsation control boxes should be identified by number with the first and last pulsators from those control boxes identified as relating to the specific box.
6. Voltage readings less than 18 DC Volts would require correction (as specified by most manufactures).
-- If voltage is low at control box possible control box problem (follow each manufactures recommendations).
-- If excess voltage drop between pulsators - possible corrosion problem and contacts or wire should be replaced

Developed by: Western Dairies, Inc.
Research and Development - Lionel H. Brazil, DVM

Doc's Corner is a contribution of Lionel H. Brazil, DVM (1928-2007). Dr. Brazil offered dairy consultation services worldwide for many years. His services covered the following areas: milking management, vacuum system evaluation; and all management procedures relating to mastitis control and SCC reduction.


 Copyrightę 2010 L. J. Engineering, Inc. All rights reserved. Revised: June 8, 2010