SAFETY GUIDELINES
The amplifiers must be installed indoors, positioned to avoid accidental damage and MUST
NOT be subjected to excessive dust, conductive or corrosive gases or liquids, nor subject to
temperatures, input voltages and electrical loads outside the stated operating range.
DO NOT dismantle or attempt to modify the amplifier, there are no user-serviceable fuses or
parts inside the amplifier. For repair, please contact SigNET technical department.
WARNING:
The surface of this unit may become hot during continued use.
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IMPORTANT NOTES
These instructions are general and cannot be considered to cover every aspect of hearing loop
system design and installation.
We recommend you read BS 7594 - Code of practice for audio-frequency induction-loop
systems (AFILS) and BS EN 60118-4 - Induction loop systems for hearing aid purposes. Other
national standards of design/installation/commissioning should be referenced where pertinent.
This product has been manufactured in conformance with the requirements of all
applicable EU directives.
Equipment guarantee
This equipment is not guaranteed unless the system is installed and commissioned in accordance
with regional or national standards by an approved and competent person or organisation.
1)
Read these instructions.
2)
Keep these instructions.
3)
Heed all warnings.
4)
Follow all instructions.
5)
WARNING
: To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture.
6)
Clean only with dry cloth.
7)
Do not block any ventilation openings. Install in accordance with the manufacturer's instructions.
8)
Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including
amplifiers) that produce heat.
9)
Protect the mains lead from being walked on or pinched particularly at plugs, convenience receptacles,
and the point where they exit from the apparatus.
10) Only use attachments/accessories specified by the manufacturer.
11) Unplug this apparatus during lightning storms or when unused for long periods of time.
12) Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been
damaged in any way, such as the mains lead or plug is damaged, liquid has been spilled or objects
have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate
normally, or has been dropped.
SigNET PRO Range Instructions
Approved Document No. DAU0000105 Rev 2
Read these instructions before installation and operation
General Operation
The amplifier mixes and amplifies the microphone, line in, outreach input signals, optical
input (model dependent) and feeds them through its sophisticated automatic gain control
(AGC) circuitry before outputting them to the hearing loop(s).
Testing the System
Using a hearing loop test receiver, listen to the loop signal in all
areas where coverage is required (we recommend you use a
Fosmeter Pro for this purpose, see ‘Additional Testing’ below). If
the signal level is not acceptable, adjust the
Loop Drive 1 and
Loop Drive 2
(model dependent) levels in small increments until
it is.
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Additional Testing
Hearing loop systems require careful testing and calibration before operation.
BS EN 60118-4 recommends that the achievable magnetic field strength of a hearing loop
system over a ‘covered area’ should be 400mA RMS per metre.
We recommend you check the loop system using a
400mA Fosmeter Pro Induction Loop
Test Kit
(
Part No. FPROK1
).
This kit includes a handheld Fosmeter Pro 400mA magnetic field strength meter, a loop
listener and a signal generator. Please contact your distributer/supplier for purchasing
information.
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SigNET PRO Range Instructions
Approved Document No. DAU0000105 Rev 2
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