To increase the stability of a loop system in the long term, it is recommended to take a view at the measurement values. This is only possible if the system is in the status OK or BREAK.
- Open the context menu of the station (Right-Click on the station) .
- Click on 'Functions' > 'Line Detection Statistics'.
Example 1: two separate loops in 'OK' state
Note: The measured RMS voltage should be at least 17 V to get a reliable loop isolator function. If the value is lower please increase the 'Pilot Gain'.
This measurement is used to display the impedance and voltage drop in a loop system. Because of voltage variability and phase shifting effects during the measurement, it is possible that these values are a bit apart.
Speaker line 9 RMS 31 V | Impedance 111 ohms |
Speaker line 10 RMS 30 V | Impedance not relevant (47000 ohms if loop not powered from this speaker line) |
- Voltage is above 25 V = very good
- A slight voltage decrease can be measured, no impact on the functionality
- Impedance below 500 ohms = healthy loop system
Speaker line 11 RMS 31 V | Impedance 138 ohms |
Speaker line 12 RMS 30 V | Impedance not relevant (47000 ohms if loop not powered from this speaker line) |
- Voltage is above 25 V = very good
- A slight voltage decrease can be measured, no impact on the functionality
- Impedance below 500 ohms = healthy loop system
Example 2: Loop 1 in 'BREAK' state
Speaker line 9 RMS 28 V | Impedance 179 ohms |
Speaker line 10 RMS 28 V | Impedance 367 ohms |
- Voltage is above 25 V = very good
- A slight voltage increase can be measured, no impact on the functionality
- The impedance in line 9 is lower than in line 10 (179 < 367). This means that the isolated segment is closer to speaker line 10 (end, OUT) of the loop. Higher impedance means less speakers and wiring.
Example 3: Loop 1 in 'BREAK' state
Speaker line 1 RMS 31 V | Impedance 208 ohms |
Speaker line 2 RMS 31 V | Impedance 248 ohms |
- Voltage is above 25 V = very good
- The impedance value of line 1 is similar to line 2 (208 ~ 248). This means that the isolated segment is in the middle of the loop.