Measuring The Loop Cable Resistance And Capacitance; When To Use The 'Repair' Function On The Loop Circuit - Honeywell GENT Nano panel-based Commissioning Instructions

Commissioning instructions

Measuring the loop cable resistance and capacitance

Power-down and disconnect both ends of the loop wiring by pulling out the associated terminal blocks at the control panel.
Resistance measurement
¨
Using a multimeter measure the resistance between the loop L1 0V (End 1) and loop L2 0V (End 2). In practice this should not be greater than 13 ohms.
Capacitance measurement
¨
Check the capacitance between the loop 0V and cable screen. The capacitance should not be greater than 1.0uF. Also the cable End-1 and End-2 should read the same value.

When to use the 'Repair' function on the loop circuit

When a loop circuit is tested for short circuit fault or if a genuine wiring short circuit fault should occur, then rectification action must be taken. First rectify the wiring fault and then
process the 'Repair' command at the control panel. You will need to be at Access level 2 or above to activate the repair function.
You will need to run the 'Repair' function
Menu
after a loop short fault is rectified.
User
Select
30
Loop > Select
Warning!- Ensure that the loop wiring faults
have been cleared before continuing
with this function!
Repair
Select
ARE YOU SURE YOU WANT TO PROCEED?
10:15 Tue 16/02/10
Yes No
4188-949 issue 3_05/10_Nano Comms inst.
Yes