Elster EK220, Operating Instructions And Installation Information, Page: 56 / 120

Volume Conversion Device EK220
56 © Elster GmbH
Bat.R Remaining battery service life
The calculation of the remaining battery service life occurs in dependence of the
consumed capacity (which is measured) and a consumption expected for the f u-
ture (which gives the remaining battery service life). Therefor e, for applications
with high current consumption the remaining battery service life may reduce
quicker than stated by the figure for the remaining service life!
If
Bat.R is less than 3 months, "Batt. low" (
®
page 50) is displayed in the system
status and "B" flashes in the display status field (
®
2.2.1).
Recalculation of the remaining battery service life is carried out automatically after
the entry of a new battery capacity
Bat.C (see below).
The settings of the measurement cycle MCyc (
®
3.9), operating cycle OCyc
(
®
3.9), input mode Md.I1 (
®
3.11) and display switch-off Disp (
®
3.9) are taken
into account during the computation of the remaining battery service life. Future
operating conditions, e.g. changing the settings, duration of readouts or frequency
of key operations cannot be foreseen however and therefore lead to a correspon d-
ing uncertainty for the displayed remaining battery service life. For data readouts,
a mean future duration of 15 minutes per month is estimate.
To increase the service life two batteries instead of one can be used. In this case
double the value (e.g. 26.0 Ah) must be entered for Bat.C (see below) after inser t-
ing the batteries.
Bat.C Battery capacity
Here, the original capacity and not the residual capacity of the batteries last used
is displayed.
After a battery replacement the capacity of the battery used must be entered here
so that recalculation of the remaining battery service life is initiated.
The capacity to be entered need not necessarily correspond to the typical capacity
quoted by the battery manufacturer. Apart from these details, the capacity d e-
pends on the application conditions such as ambient temperature and the device
current consumption. In view of this and as a precaution, the minimum and not the
typical value should be used. When used in ambient temperatures between –10°C
and +50°C, the value to be entered is normally about 80% of the capacity quoted
by the manufacturer.
With the use of the size "D" battery obtainable from Elster GmbH, the value 13.0
Ah should be entered for
Bat.C and 26.0 Ah when two cells are used.
Contr Display contrast
Setting the contrast of the display. Changes only become effective after confirma-
tion of entry with <ENTER>. Valid range: 0 bis 255.
St.SL Supplier's lock (status / close)
Cod.S Supplier's combination (enter / change)
St.CL Customer's lock (status / close)
Cod.C Customer's combination (enter / change)
Basic principle of operation of lock and combination:
®
2.4.3.
Open lock: Enter the correct combination (numerical code)
Close lock: Clear
St.SL resp. St.CL . (
¬
+
-
in the entry mode,
®
2.3.1,
Data Class 6).
Change combination: Entry of a new combination (code) with lock open.
(irrespective of the above mentioned access rights)
The individual characters of the combination code in hexadecimal notation, i.e.
they take on values from 0 to 9 and from A to F. "A" follows "9" and "F" is followed
again by "0", i.e. the key
-
changes "9" to "A" and "F" to "0".