Xylem sensus HRI Montage-, Betriebs- Und Wartungshandbuch Seite 3

HRI is available in two versions.
• The HRI-A PulseUnit provides high-resolution
pulse outputs.
• The HRI-B DataUnit has additionally a data in-
terface for reading meter ID number and index.
1 Delivery parts
HRI sensor, bayonet ring, cut meter lid, 2 screws, 2
screw seals, 1 adhesive seal
Installation:
Just before mounting the HRI on the meter it is es-
sential to remove the aluminium foil at the bottom
side. A screwdriver Torx (T8) or slot (3.5*0.6) is rec-
ommended for mounting. The torque should be 0.6
Nm.
2 Meters with plastic register
Change the lids and put the HRI on the meter, so
that the two pins on top of the register fit exactly into
the holes at the bottom of the HRI. Fit the two
screws. For tamper protection fit the plastic seals on
top of the screws. The bayonet ring and the adhe-
sive seal are not used for this register type.
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1
2
3 Meter with glass-copper register
First exchange the lids. Mount the HRI with both the
screws on the bayonet ring. For tamper protection fit
the plastic seals on the top of the screws. Fit the
bayonet ring with the mounted HRI on the top of the
meter register and turn it until it is drops into place.
Push and turn the bayonet ring clockwise until the
lever clicks into place. If required fit the adhesive
seal. To remove the HRI lift the lever and rotate anti-
clockwise.
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5
3
4 Type
Depending on the order specification, HRI can be in
these different pulse modes:
HRI Pulse Unit: Type A3 and A4
HRI Data Unit: Type B2, B3 and B4
with following pulse weights:
Possible values for residential meters:
D = 1 / 2.5 / 5 / 10 / 25 / 50 / 100 / 250 / 500 or 1000
Pulse mode Wire
l1 (white)
Balanced pulses** Tamper/ Error
B1
Forward flow
B2
pulses
Forward and
A3/B3
backwards pulses
Balanced pulses** Tamper/ Error
A4/B4
**) Balanced pulses: Reverse flow must be compen-
sated by identical forward flow before more pulses
are output. That means, no output pulses during this
period even the meter is counting forward.
Ground (brown)
DATA (green) only for HRI Type B (alternatively for
external power supply)
0.3 V
Battery or external power supply (for all B
types): 3V Lithium battery with autonomy lifetime of
more than 10 years.
With unbroken permanent external power supply of
24VDC (max. 50VDC) unit lifetime is increased to
more than 15 years. In case of external power failure
the battery of the module takes over the supply. All
stored data are retained and the volume detection
continues automatically. The external power supply
can also be an M-Bus central unit.
en - Original instructions
l2 (yellow)
"normally open"
Reverse flow
pulses
Flow direction
"normally
closed"
l1 white or
l2 yellow
Ground: brown
Data: green (HRI-B)
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EN