Single Entry 
This function enables you to enter meter readings for a single customer, contract, installation or device. For example, you may wish to enter a control meter reading for an installation or an interim meter reading with subsequent billing.
You do not have to create a meter reading order before carrying out single entry. However, if a meter reading order already exists, that order is taken into account. If no meter reading order exists, an order is created using the criteria you have entered. In the case of a meter reading reason that triggers billing, a billing order is created.
The meter readings entered are validated. If a meter reading fails the validation, it can be immediately released or reset for later processing.
You can specify the following meter reading data for single entry:
Meter reading
Meter reading date
Note from meter reader
Actual meter reading type
Meter reader
Time of day of meter reading
Actual meter reading date
Actual time of day of meter reading
Date of maximum meter reading
Time of day of maximum meter reading
Relevance to billing/extrapolation
If a meter reading result fails the validation, you can process it using the following functions:
Correct errors
You branch to the correction screen. The correction screen contains detailed information such as the expected reading, actual consumption, and expected consumption. If the meter reading is released, the remaining validations are carried out.
Release w/o correction
The meter reading becomes plausible. No further validations are carried out.
Estimate
Meter reading results can be selected for estimation.