Instructions for Using Your HLR III
receiver has been loaded with a 9 volt alkaline battery and has passed
quality control testing. To change the battery, carefully open the battery
compartment door by gripping the sides of the front bottom panel and
sliding the panel off. Following the illustration in the battery
compartment, insert the new battery. For best performance, always use
Place the receiver in breast
pocket or use the built in neck cord.
Plug ear bud or
headphones into the jack at the top of the receiver.
Place ear bud(s)
into ears or headphones over both ears.
Slowly turn the
volume control until it clicks “on.”
The receiver's two LED indicators will flash briefly when the unit is
turned on. This confirms that the battery is good. To maximize battery
life, always turn off the receiver when it is not in use.
control to a comfortable sound level. For best reception, most loop
systems will require a more or less vertical/upright receiver orientation.
Experiment by changing the position of the receiver while listening.
For added convenience, a second volume control is built in to the
LED Loop Signal Check:
The receiver's two
LEDs provide a visual confirmation of the loop signal. The receiver must
be positioned in a vertical/upright position when testing.
No LEDs = loop signal too weak
Green LED = acceptable loop signal
Green LED w/Red LED flash = good loop signal
Both LEDs on continuously = loop signal too high
For more comprehensive loop
system evaluations, Oval Window Audio’s FSM Loop Test Set is recommended
for certifying loop installations as per latest IEC 60118-4 standards.
In environments with high levels of low frequency (60 Hz) electromagnetic
noise (heard as “hum” through the receiver’s headphones), the loop
receiver’s “noise filter” function may be employed. Access the noise
filter feature by removing the battery and locating the switch in the
battery compartment. Use a small screwdriver or pen to push the small
switch to the “on” or “off” position as shown by the illustration in the
battery compartment. Please contact Oval Window Audio for more information
pertaining to interference mitigation.
Recharging the Induction
Receiver with optional charger & NiMH batteries:
THE RECEIVER MUST BE LOADED WITH THE OPTIONAL NICKEL METAL HYDRIDE (NiMH)
RECHARGEABLE BATTERY AND ONLY THE OVAL WINDOW AUDIO DESIGNATED CHARGER
MUST BE USED.
should be switched off and the NiMH battery properly inserted.
receiver by inserting the charger plug into the receiver’s
ear/headphone jack located at the top of the unit. Prior to using for the
first time the battery should be left on charge for at least 12 hours.
every use. The NiMH batteries will perform better and have a longer life
if they are used and charged daily, usually overnight.
breaks in use (e.g. extended holidays), fully charge the battery and
remove it from the receiver. Place in a dry storage space. To maximize the
life of the battery, do not leave on charge for extended periods (10 or
To clean the ear buds or headphones,
lightly dampen a paper towel with isopropyl alcohol and wipe the cushions,
headband and plug. Allow to dry before using. Headphone cushions may be
removed for washing with mild dish detergent. Replacement cushions may be
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