Kamstrup ULTRAFLOW 54 H, Technical Description

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ULTRAFLOW® 54 (H)/(J)
Kamstrup A/S ∙ Technical Description ∙ 5512‐1554_J1_GB _04.2018 49
Figure 44. Interface connectors, ULTRAFLOW
®
54 (H)/(J).
8.11 Test mode
To minimize the time spent on calibration, ULTRAFLOW
®
54 can be switched into test mode. When ULTRAFLOW
®
is
in test mode (verification mode), the measuring routines only take one fourth of the time they take in normal mode.
In order to bring ULTRAFLOW
®
into test mode, pin 4 of the internal connector is connected to frame ( Figure 44 )
followed by connecting the meter to supply. After approx. 1 sec. the sensor goes into test mode and the connection
between pin 4 and frame is disconnected again.
Test mode is ended by disconnecting the supply to the sensor.
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 as the total duration of ULTRAFLOW
®
in test mode is
negligible compared to the operating time of ULTRAFLOW
®
outside test mode.
8.12 Externally controlled start/stop
In connection with calibration by means of serial data, e.g. in connection with NOWA, ULTRAFLOW
®
54 can be
monitored by an external signal when it is in verification mode (see paragraph 8.11 Test mode ). This is done by
setting pin 4 of the internal plug on logic High when starting the test and setting it on logic Low again 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 in connection with
start as well as the quantity lacking in connection with stop. These deviations are due to the fact that the sensor
measures flow and calculates volume at fixed intervals as illustrated by
Figure 45 .
Meter's connector (H)
Pin 1 Gnd
Pin 2 Vcc
Pin 3 Pulse out
Pin 4 Verification/Adjustment
Meter's connector (J)
Pin 1 VCC
Pin 2 GND
Pin 3 Pulse out
Pin 4 Verification/Adjustment