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 7
1 General description
ULTRAFLOW
®
is a static flow sensor based on the ultrasonic principle. It is primarily used as a volume flow sensor
for energy meters such as MULTICAL
®
. ULTRAFLOW
®
54 has been designed for use in heating installations where
water is the heat-bearing medium. The variants ULTRAFLOW
®
54 (H)/(J) comprises all flow sensors with type
numbers 65-5-XXHX-XXX / 65-5-XXJX-XXX, respectively. Both variants of these flow sensors consist of threaded hot
forged meter housings, and we distinguish between two different types of electronic boxes and corresponding
interface connectors for e.g. communicating with the meter by means of METERTOOL or NOWA. Type (H) corresponds
to the nominal flow q
p
0.6…2.5 m
3
/h, while type (J) corresponds to q
p
3.5…10 m
3
/h.
Flow measuring in ULTRAFLOW
®
is based on ultrasonic measuring and microprocessor technique. A single-board
construction comprises all calculating and flow measuring circuits, which provides a compact and rational design
and, in addition, exceptionally high measuring accuracy and reliability is obtained.
The volume is measured using bidirectional ultrasonic technique based on the transit time method, proven a long-
term stable and accurate measuring principle. Two ultrasonic transducers are used to send sound signals with as
well as against the flow. The ultrasonic signal travelling with the flow reaches the opposite transducer first, and the
time difference between the two signals can be converted into average flow velocity and thereby to volume flow
rate and volume.
A three-wire pulse cable is used to connect ULTRAFLOW
®
to the calculator. The cable transfers the signal to the
calculator and supplies the flow sensor. The transmitted signal corresponds to the flow and consists of a number
of pulses, which is proportional to the quantity of water having passed through the sensor (volume).
When ULTRAFLOW
®
is used as volume flow rate sensor for MULTICAL
®
, ULTRAFLOW
®
can be direct connected to
MULTICAL
®
at cable lengths up to 10 m. In this case, ULTRAFLOW
®
is supplied by MULTICAL
®
directly.
ULTRAFLOW
®
must be connected to MULTICAL
®
via a Pulse Transmitter if you want to use another calculator than
MULTICAL
®
. If ULTRAFLOW
®
is connected to a foreign calculator with a different pulse factor than the one supplied
by ULTRAFLOW
®
, a Pulse Divider must be used instead. Pulse Transmitter and Pulse Divider are available as
accessories with built-in supply for ULTRAFLOW
®
and galvanic separated pulse output. Furthermore, they allow a
cable length of more than 10 m between ULTRAFLOW
®
and the calculator, which is required in some installations.
When ULTRAFLOW
®
is connected to MULTICAL
®
a Cable Extender Box can be utilized as an alternative in order to
extend the cable length between ULTRAFLOW
®
and MULTICAL
®
up to 30 m. Note, that in this case ULTRAFLOW
®
and
MULTICAL
®
are not galvanically separated.