RBC Bioscience MagCore Plus II Service Manual page 28

C. Test the Tip of the W4
1. Please put the 200μl SP Tip into Well 4 of T-Rack.
2. Please add 1 ml water to the Sample Tube and
put it in W1 of the T-Rack.
3. Please select the Test W4 Tip.
4. Please check whether the liquid levels in all tips
are consistent with each other. If the liquid levels
are not consistent, please check the O-Ring
(Please refer to the Replace O-Ring chapter for
more information).