Use ACCU-CHEK Compact Plus Clear control solution instead of blood to run a control test to ensure that your ACCU-CHEK Compact Plus and ACCU-CHEK Compact Plus or ACCU-CHEK Compact test strips work properly and provide reliable results. When running a control test with the Compact Plus Clear control solution, you have to manually flag the control test on your ACCU-CHEK Compact Plus system. Refer to the ACCU-CHEK Compact Plus system's Owner's Booklet for information on when a control test should be run.