Credit limit â This credit limit is not a total credit limit for the control area. In this way you ensure that a credit restriction will be effective for new customers, too, as soon as the customer has been created. If no credit master record has been maintained, there is no credit limit.he credit master record is automatically maintained when at least one of the following fields is maintained for the corresponding control area. 1  Via the customer master record, you can allocate every customer to a credit risk category. 2  This is used if automatic credit control is used.
light sleep. A colloquial term for the first stage of nonârapid eye movement (NREM) sleep. It is sometimes also applied to the second stage of NREM sleep.
Light and Deep Sleep. During sleep, you alternate between cycles of REM (rapid eye movement) and NREM (non-rapid eye movement) that repeat about every 90 minutes. You spend about 75 percent of the night in NREM sleep, which consists of four stages of increasing relaxation. Stage one, or the phase between being awake and asleep, is considered light sleep. Deeper sleep begins in stage two, as your breathing and heart rate become regular and your body temperature drops.