Dear Norbert,
There is an RFC call "MEASUREM_DOCUM_RFC_SINGLE_001" which you could use within a loop to import the meter readings (measurement documents).
CALL FUNCTION 'MEASUREM_DOCUM_RFC_SINGLE_001'
EXPORTING
measurement_point = p_point
reading_date = p_meas_date
reading_time = sy-uzeit
reader = sy-uname
origin_indicator = 'A'
recorded_value = p_cntr_rdg
prepare_update = 'X'
commit_work = ''
wait_after_commit = ''
notification_type = 'M2'
IMPORTING
measurement_document = lv_docno
EXCEPTIONS
no_authority = 1
point_not_found = 2
index_not_unique = 3
type_not_found = 4
point_locked = 5
point_inactive = 6
timestamp_in_future = 7
timestamp_duprec = 8
unit_unfit = 9
value_not_fltp = 10
value_overflow = 11
value_unfit = 12
value_missing = 13
code_not_found = 14
notif_type_not_found = 15
notif_prio_not_found = 16
notif_gener_problem = 17
update_failed = 18
invalid_time = 19
invalid_date = 20
* OTHERS = 21.
Thanks and Regards,
Amitava