✔On Call Plus Glucometer under Laboratory category. ✔On Call Plus is a blood glucose monitoring Machine used to check the blood sugar level of an individual ✔Normal glucose levels before eating should be 5.9 millimoles per liters and below ✔The blood sugar readings taken before food are referred to as fasting blood glucose ✔The normal blood sugar readings after eating should be 7.8 millimoles ✔It is advisable to pay your doctor a visit if you notice any higher-than-normal figures ✔Readings should be taken a few minutes before food and two hours after eating.