But when you are commissioning the system what measurements should you be looking for how do you test FSL systems and open closed and tamper circuits on PIR's how do you know if you've got a high resistance reading etc?
You would be looking for the "usual" measurements still - e.g. that resistors are functioning properly in place - say in the case of the other recent post on his Scanny - you'd activate the circuit, and measure 6k9. You'd close the circuit and measure 2k2. You'd open the cover and measure open circuit.
You're looking to see that the circuit behaves as described - pretty well all manufacturers specify in their manuals the tolerance band for a circuit - e.g. over 10k is trouble, open circuit Tamper, x value circuit active, y value circuit normal.
High resistance.... well, strictly one should witness test one's cables post installation, pre commissioning - this should give known values for each cable and each pair in use. Practical site work says this is rarely done - and so we tend to rely on known values for each circuit condition possible.
Voltage and current readings remain as always.
What is clear, is that values reported by the control equipment, especially remotely, should NOT be relied upon in the absence if site measured readings - as a business, we will not remotely commission systems - yet. We may upload programming to site to prove the UDL functionality, but all resistance and voltages are taken on site, using calibrated meters. We've updated most of our paperwork to allow readings for the conditions possible on each circuit, plus voltage and current, plus text descriptor.
So overall, there's no real change to what many of us do in terms of commissioning - most UDL software can report the current device status, and the log will let you know if there's been any alarm, trouble, or tamper conditions. Of course, with SIA format signalling, most status conditions can be reported in real time to an ARC too.
