Test Mode; Externally Controlled Start/Stop - Kamstrup ULTRAFLOW 54 Technical Description

TECHNICAL DESCRIPTION
Figure 30. Interface connector.
The electronics are encapsulated in ULTRAFLOW
order to gain access to pin 4 an adapter with four-pole connector is used (see Figure 43, page 60). Before clicking
the adapter onto the electronics housing, a hole is drilled in the cover of the electronics housing at the marking
(ø2 mm, max. drilling depth 10 mm). (See Figure 31.) Subsequently the signal cable is connected to the terminals
of the adapter. (See par. 7.6.)

8.14 Test mode

To minimize the time spent on calibration, ULTRAFLOW
(verification mode) the measuring routines only take one fourth of the time they take in normal mode.
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ULTRAFLOW is put into test mode by connecting pin 4 of the internal connector to ground (Figure 30) and
subsequently connect the supply. After approx. 1 second the sensor goes into test mode and the connection
between pin 4 and ground is disconnected.
Test mode is ended by disconnecting the supply to the sensor.
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Note: An ULTRAFLOW in test mode uses approx. 3 times as much power as in normal mode. However, this does
not influence the total battery lifetime of the energy meter.

8.15 Externally controlled start/stop

In connection with calibration by means of serial data, e.g. in connection with NOWA, ULTRAFLOW
be monitored by an external signal when it is in test mode (see paragraph 8.14 Test mode). This is done by
grounding pin 4 of the internal connector when starting the test and removing it when the test has been
completed. The volume of water that has been accumulated during the test can be read serially.
The accumulation is based on the same data as those used for calculating the number of pulses to be emitted.
In addition to accumulating water volume during test, the sensor corrects for the excess quantity measured in
connection with start as well as the quantity lacking in connection with stop. These deviations occur because the
sensor measures flow at regular intervals, as illustrated in Figure 32 below.
46
Meter interface
Pin 1 Vcc
Pin 2 Gnd
Pin 3 Pulse out
Pin 4 Access control
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34, and, thus, the four-pole connector is not directly available. In
5512-385 GB/02.2014/Rev. H1
Figure 31. Drilling marking on
ULTRAFLOW
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54 and 34 can be switched into test mode. In test mode
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ULTRAFLOW 54 and 34
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34 cover.
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54 and 34 can