TECHNICAL DESCRIPTION MULTICAL® 21 & flowIQ® 2101 /..02 /..03
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Kamstrup A/S •Technical Description • 5512-897_J1_GB • 06.2016
10.9
Optical eye
The meter is fitted with an optical eye that gives access to the meter's external interface, with which all the
meter's data registers can be read. For instance, data can be read, using Kamstrup's optical reading head.
The reading head includes a permanent magnet, which switches on the optical eye. The interface
communicates at 1200 baud.
In order to limit current consumption the default setting of the optical eye is OFF.
By means of a magnet sensor the optical eye will automatically switch ON, if an optical reading unit with
magnet is placed on the meter. The start-up time of the optical eye (from the magnet is attached to the
meter until the optical eye switches on) depends on the meter's mode as shown in the table below.
Normal mode
4 sec.
Verification mode
0.5 sec.
For Kamstrup’s optical reading head a holder is available, which fits the water meter, and is clicked onto
the meter. A picture of the optical head placed on the meter can be seen in section:
‘Pulse Interface for MULTICAL® 21 / flowIQ® 2101 / ..02 / ..03’
11
Data loggers
11.1
Memory
The meter has a permanent memory (EEPROM), in which the values of various data loggers are saved.
Loggers are read through the optical eye.
The meter includes the following registers:
Data logging interval
Data logging depth
Logged value
Monthly logger
36 months
Counter register
Daily logger
460 days
Counter register
Info logger
50 events
Info code, meter reading and date
The loggers are static ones. Thus, the register types can not be changed. The same applies to the logging
intervals. When the last record has been written into the EEPROM, the oldest one will be overwritten.