Specifications

Manual Euro-MERiDIAN
Chapter 11 Page 11 - 9
G: iD COMMISSIONING
READINGS
On completion of the
installation, it is essential that
the commissioning readings
described below be taken, both
to ensure the integrity of the
system and to satisfy the
documentation requirements
of BS.4737, etc.
This procedure has been
agreed with NACOSS as an
acceptable method of meeting
these requirements:
1. Complete the wiring, but
do not secure the
detector housings.
2. Remove the iD + and –
connections from the
terminals E3 & 4 at the
End Station, and twist
them together.
3. Measure, and record, the
following readings, at
each detector:
a: The resistance between
the iD Blue and Yellow
connections – and ensure
that this is correct for the
cable length involved
(typically 100 metres of
alarm cable will measure
approx. 16 ohms).
b: The supply voltage at
the detector (if
applicable).
4. Secure the detector
housing, ensuring that the
tamper switch is correctly
closed.
5. Repeat the above for each
detector.
6. Separate the iD + & –
wires at the End Station,
and measure and record
the resistance between
them. Compare the
reading with the table on
page 11-10 to ensure that
the correct number of
biscuits is being read.
Investigate any significant
variation.
7. Check the resistance
reading between the iD +
& – wires and mains earth.
This should show open
circuit; any reading could
indicate an earth leakage,
which may cause
problems later.
8. Check the voltage reading
between the iD + & –
wires and the 0v and
+12v terminals (E1,2). This
should show open circuit;
any voltage present will
indicate a leakage, which
may cause problems later.
9. Replace the iD wiring in
the End Station terminals.
10. Test iD line response in
diagnostic menu, and
Walk test detectors.
Note: The measurements on this
page are made with the wiring still
in place at all detectors, and with
power applied. The presence of the
iD biscuits will not affect the
readings.