Viewing Maximum Load Values; Description - RMG EC 900 Operating Instructions Manual

OPERATION
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Viewing maximum load values

Description

The EC 900 includes a maximum-load display feature which records and stores the maximum quan-
tity supplied during a supply period and the maximum quantity supplied during a day (gas day).
The supply period can be set to a value between 1 and 600 minutes. In the factory, the supply peri-
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od has been preset at 60 minutes. The daily supply is calculated for one gas day. Usually, a gas day
starts and ends at 6 o'clock. This time can also be adjusted. Within a gas day, it is checked at the
end of each supply period whether the quantity of gas supplied during this period has exceeded the
previous maximum value. If this is the case, the appropriate value will be saved to a particular
memory. There are the following archives for storing such values: periodic, daily and monthly ar-
chives. At the end of a gas day, the maximum quantity determined for the past day will be reset so
that a new maximum quantity can be determined for the current day. Also daily quantities within a
month are being treated in the same way. A month ends on the first day of the next month at the
end of the gas day (e.g. 01.12.2008 06:00 o'clock).
Thus, in normal operation, 24 periodic entries are generated in the course of a gas day. However,
disturbances might cause other entries to be made in the course of a supply period. If this is the
case, such entries will be identified by an asterisk (*). Further options to generate additional entries
include e.g. a restart of the device or changing the clock. Such disturbances of the normal supply
period are also recorded in separate logbooks and event archives. Therefore, all entries in the peri-
odic, daily and monthly archives which are identified by an asterisk (*) because an event has oc-
curred have to be checked for the appropriate maximum load. All archives can be read out at any
time (see page 54).
If a restart is made or the clock is changed, the new start of the period will automatically synchro-
nize to the next supply period, the next gas day and the next month. During the time of synchroni-
zation, the current maximum load will not be displayed.
The maximum load displays for the maximum values stored and the current loads for the volumes
at measurement and base conditions comprise a display with 6 positions before and 2 after the
decimal point. This enables maximum load values to be recorded even in the case of low flow rates.
However, the meter readings of the periodic, daily and monthly archives are stored without decimal
places. Therefore, a comparison of maximum load values with meter readings stored is possible
only to a limited extent.
A customized display has been integrated into the device especially for gas consumers; here the
operator can display all relevant data. The sequence and choice of the values displayed can be ad-
justed. The contrast setting and the current load of the customized display cannot be changed.
(The basic handling of the device is described on page 35 of this documentation.)
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