TECHNICAL DESCRIPTION MULTICAL® 21 & flowIQ® 2101 /..02 /..03
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Kamstrup A/S •Technical Description • 5512-897_J1_GB • 06.2016
Info code - TAMPER
This info code becomes active if the meter has been exposed to unauthorised access, i.e. an attempt to
cheat. This means that the meter is no longer valid for billing purposes. The info code TAMPER cannot be
removed.
If the info code TAMPER is active, no other info codes can be read via the Wireless M-Bus signal.
Info code – DRY
This info code indicates that there is air in the meter. The ultrasonic measuring principle implies that the
meter must be water-filled; the meter does not count air. If there is air in the meter, nothing is measured.
The info code DRY activates in the display when eight successive measurements have shown that there is
air in the meter, i.e. after minimum 32 seconds and maximum 64 seconds. The code disappears after one
measurement without air, i.e. after 4 seconds.
If the info code DRY is active, it will immediately appear in the display and from readings via the optical eye.
In order to avoid false alarms due to short-term air build-up in the meter, the info code DRY is not added to
the relevant registers, until it has been continuously active for 30 minutes.
DRY is saved with a date stamp in both the daily register for 460 days and the monthly register for 36
months. Furthermore, it is saved in the info code register of the latest 50 info code events. Together with
the info code event, a time indicator with seven time intervals (which indicates how long the info code has
been active) is registered.
Correspondingly, the info code DRY is not added to the Wireless M-Bus signal, until it has been
continuously active for 30 minutes. Furthermore, if the info code DRY has been active within the latest 30
days, a time indicator with seven time intervals indicates in the Wireless M-Bus signal how long the info
code has been active.
Info code – REVERSE
This info code indicates that the water in the meter flows in the wrong direction.
Info code REVERSE activates when the water runs backwards in the meter at a flow, which numerically
exceeds Q
1
for five consecutive minutes.
The code disappears from the display when the water is stagnant, or again runs in the correct direction in
the meter. It can take up to 64 seconds until the info code disappears.
The alarm REVERSE is saved with a date stamp in both the daily register for 460 days and in the monthly
register for 36 months. Furthermore, it is saved in the info code register of the latest 50 info code events.
Together with the info code event a time indicator with seven time intervals, which indicates how long the
info code has been active, is registered.
The Wireless M-Bus signal includes the code REVERSE. If the code REVERSE is active or has been active
within the latest 30 days, a time indicator with seven time intervals will indicate how long the info code has
been active.