APPLICATION GUIDE
28
Commissioning
Check the loops with a multimeter
Auto-learn the panel
Upload to a PC (Optional)
Download from a PC
Check auto-config
Run Intermittent Fault search
Test the devices
1. Loop Checking with a multimeter
The first quick test that should be done on all the loops is to check the continuity of the loops using a multimeter.
The resistance should be measured start positive to end positive, start negative to end negative, and positive to
negative at the start and end of each loop.
The resistance along the positive line should be less than 50 ohms. The resistance across the negative line should be
2k5 ohms for each device on the loop, e.g. 20 devices should measure 50k ohms.
The resistance across the loop positive to negative will be in the Mohm region.
Ensure the screen is continuous around the loop, this reading should be approx 10 ohms.
The screen should not be bonded to building earth.
Test the loops with the multimeter set to AC volts – this is to check that there is no induced voltage which could be
caused by the cables being run too closely to a high voltage source.
This will show if anything drastic is wrong with the loop devices wired in backwards breaks etc. If there is a short at the
end or start of the loop this will need to be fixed before powering the panel.
2. Auto-Learn Function
This is accessed through the engineer level access code. When the panel is auto-learned all the devices address
information is set up from address 1 upwards from the start of each loop, previous addressing is lost. Once the panel
has finished the auto-learn it will reset itself. After this is done reset the panel using the touch screen.
CF3000 / DF6000 / FX6000 Application Guide
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