LactoScope Filter
  • Laboratories are wet places
  • Electricity and water/milk/chemicals/people do not mix
  • Do not perform any service or maintenance yourself, except as detailed in the User’s Guide
  • Never restrict airflow into or out of the instrument
  • Regularly check the air vents for blockages

Before Removing Any Covers

  • Switch off the power at the back of the instrument
  • Switch off the power at the wall outlet (or isolation point)
  • Remove power lead from back of instrument
Daily Maintenance
LactoScopes need to be kept clean, wipe the pipette after each analysis. Be aware that pieces of tissue may block the flow system.

1/ Keep the sampling area clean.

2/ Refill Zero and Clean containers.

3/ Check the waste tube and container.

4/ If testing high sugar or protein products perform an Enzymatic Clean.

Weekly Maintenance
Weekly maintenance consists of flushing the instrument with 10% Decon solution. Mix 10ml of Decon 90 with 90ml of distilled water. Heat to 40°C and run multiple analysis until the cup is empty. Leave the LactoScope to automatically clean after 3 minutes.

If left to soak the Decon solution must not be inside the cell longer than half an hour.

Quarterly Maintenance

Clean the Milk Filter
1/ Loosen the pipe clip and pull the Bev-a-line tube carefully from the end of the filter tube.

2/ Unscrew the filter and guide tube and withdraw guide tube and milk filter carefully from the block.

3/ Clean the milk filter with normal tap water.

4/ Assemble the filter and guide tube. Assure that the notch in the filter tube is at the 3 o’clock position (Right). Tighten the guide tube firmly with the fingers.

  New Style Filter LactoScope
  Old Style Filter LactoScope
  Milk Filter
  5/ Refit the Bev-a-line tube and secure it with the pipe clip.

Replace or Dry the Silica Gel
Lift the cover of the instrument and loosen and remove the silica gel holder by loosening the three plastic nuts. If possible cover the aperture to minimise moist air ingress.

2/ Place the holder into an oven for at least 2 hours at 100 to 200°C alternatively empty into a glass beaker, microwave for 5 minutes and allow to cool (Note: silica gel gets very hot, handle with care) and refill silica gel holder or replace with new fresh silica gel.

3/ Before re-assembling, let the silica gel cool down in a dry place to prevent damage of the optics. Let the instrument stabilize for 2-4 hours. Check your calibrations afterwards.


Clean the Water Tanks
Disconnect the Water/Decon tank(s) from the instrument.

2/ Clean the tank with a large bottle brush or flush out with high-pressure water.


Replace the Air Filter (If fitted)
The air filter is located on the back of the instrument. Turn the screw on the Air filter holder 90° and take out the air filter holder.

2/ Replace with a new filter. Turn the screw 90° and push back the filter holder into its place until click is heard.


Homogenizer Check
Warm approx. 100 ml fresh raw milk and measure 3 replicates and note the result.

2/ Do not wait for or allow the LactoScope to clean. Run 5 more analysis collecting the sample by disconnecting the tube from the waste valve.

3/ Reconnect the tube and re-analyse the collected sample. The mean fat reading should not differ more than 0.08 from the original result. If the difference is greater, the homogenizer should be replaced.