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Amperes Electronics. LS4808 and LS4816 succeeded their predecessor with totally new circuitry providing major improvements over the perfor- mance, accuracy and reliability. They now comes with 8 and 16 monitoring channels with simplified setting menus. New measuring algorithms enables measurement of impedance faster with higher accuracy within a narrow tolerance.
The green LED indicates the corresponding channel is normal, whereas red indicates that channel is faulty. 6. 24V DC POWER SUPPLY PORT The unit requires 24V DC power supply and recommended PSU shall be Amperes PS9400. Only use regulated power supply if other than PS9400 is installed.
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Whenever a fault condition is detected, this port shall provide a dry contact to link to external alerting devices, such as mimic panel, etc. 10. RS485 OUTPUT (OPTIONAL) Event triggered data shall be transmitted with RS485 protocol. LS4808 / LS4816 | 8 / 16 CHANNEL SPEAKER LINE SURVEILLANCE PAGE 3...
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It is recommended that periodical manual checking or setup to be made as connections may deteriorate over time and thus affecting overall impedance value. PAGE 4 LS4808 / LS4816 | 8 / 16 CHANNEL SPEAKER LINE SURVEILLANCE...
Surveillance’. The red LEDs shall lit in sequence indicating sequence of initiali- sation. ENTER MENU NEXT TO ENTER SETUP To begin programming, press MENU button, and the SETUP menu shall be displayed. LS4808 / LS4816 | 8 / 16 CHANNEL SPEAKER LINE SURVEILLANCE PAGE 5...
Note: In long cable circuit or zone with multiple branchings the basic mode may not be suitable to detect the fault such as short at the far end of cable (e.g: 500m), cables itself has resistance, thereby would not show short phenomena. It is therefore, Advance setup shall be used. PAGE 6 LS4808 / LS4816 | 8 / 16 CHANNEL SPEAKER LINE SURVEILLANCE...
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The limits are typically 15%, eg if the circuit has impedance of 1K Ω, the limits generated shall be 850 to 1.15K Ω. LS4808 / LS4816 | 8 / 16 CHANNEL SPEAKER LINE SURVEILLANCE PAGE 7...
If a test interval is selected ( from 1 min - 24 hour ). By default, auto mode is set to off. INTERVAL: 01 MIN Use NEXT / PREV button to select time. ENTER MAIN MENU 3. AUTO TEST PAGE 8 LS4808 / LS4816 | 8 / 16 CHANNEL SPEAKER LINE SURVEILLANCE...
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LS4808 / 4816 are used to detect faulty speaker circuits and the impedance measured shall not be used as final value / reading as conclusions. The actual reading may differ from actual impedance meter in range of 5%. LS4808 / LS4816 | 8 / 16 CHANNEL SPEAKER LINE SURVEILLANCE PAGE 9...
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LS4808 / 4816 has unique way to detect faults, there by using basic mode, creating an impedance limit range and for more sensitive detection, set the unit to ‘advance’ mode. PAGE 10 LS4808 / LS4816 | 8 / 16 CHANNEL SPEAKER LINE SURVEILLANCE...
482 x 88 x 180 mm Weight 2.20kg 3.25kg Note: The above specifications are correct at time of printing but subjected to changes without prior notice due to product improvements. LS4808 / LS4816 | 8 / 16 CHANNEL SPEAKER LINE SURVEILLANCE PAGE 11...
Only Amperes Electronics Service Centres are allowed to make warranty repairs : a list of Amperes Electronics Service Centres may be asked for by the purchaser or send directly to Amperes Electronics Sdn Bhd at 70 Jalan Industri PBP 3, Tmn Perindustrian Pusat Bandar Puchong, 47100, Puchong, Selangor, Malaysia or its authorized dealers.
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