Pambry Listen Ear PED-1704-L User manual
How do I use it?
Using the device is simplicity itself. Carefully insert your battery into the battery
compartment (located at the rear of the unit) taking note of the polarity markings.
A quality AA (LR6) alkaline type battery is recommended.
Press the Power button on the front face and wait for ALERT lamp to illuminate and
flash GREEN.
Clip the device onto your clothing and keep it exposed to your environment. Do NOT
place in your pocket as this will adversely affect the readings and block the line of sight of
the ALERT warning lamp.
The device constantly checks the noise levels and responds accordingly to the measured
noise levels (see section “How does it work?”).
The ALERT lamp should flash GREEN for a normal safe noise environment.
IF ANY OF 2 (AMBER OR RED) WARNING STATES PERSIST, IT IS IMPERATIVE
YOU OBTAIN AND USE SUITABLE HEARING PROTECTION.
After use, press and hold the power button until the ALERT lamp goes out.
Battery
Compartment
Clip
Sensor
Power
Button
Alert
Lamp
How does it work?
The noise level measurement is performed by the built-in
highly stable MEMS audio noise sensor and processed by the
battery powered internal electronics control unit. The Pambry
patented anti-knock feature is used to minimise the effect of
any mechanical case noise that can affect readings.
When the noise level exceeds the pre-set thresholds, the
ALERT lamp changes from GREEN to AMBER or RED (see
technical specification). The ALERT lamp is extinguished
once the noise level falls below threshold for more than 30
seconds.
Each transition of the ALERT lamp to AMBER or RED also
triggers the vibrate alert for approximately 15 seconds. This
can be suspended by a short press of the Power button.
Battery life is in excess of 360h and a Low battery indication
is shown by very short RED flashes of the ALERT lamp.
Welcome to your new Personal Noise Level Alert warning device which is
one of the family of Personal Alert devices manufactured in the UK by
Pambry Electronics Ltd. The other devices relate to Noise Dose,
Carbon Dioxide (CO2- Indoor) and Nitrogen Dioxide
/Ozone (NO2/O3- Outdoor) measurements.
Key Features
n Self-contained unit
n Simple to use
n Long battery life
n Optical and Vibration alert
n Patented anti-knock feature
(Patent No: GB 2 551 724)
What is it?
Your device is a small battery powered unit that measures the current noise level and
indicates whether the noise level in your environment is acceptably low or too high (ie.
safe or not safe). In this latter case you should take steps to obtain, and use, some
hearing protection. As the unit measures real time live noise levels, it can also be used to
determine when hearing protection is NOT required.
Technical Specification
Measuring range: 40dB to 120dB SPL
Noise dose threshold levels: ALERT Lamp Noise Level
Colour dBA
GREEN Less than 80dB
AMBER Greater than 80dB
RED Greater than 85dB
Threshold trip times: 1 sec ON, 30 sec OFF
Microphone type: High stability digital MEMS microphone
Calibration: Factory calibrated
Weighting: A weighting IEC 61672:2002 Class 2
Warning lamp: Multi coloured LED, Red, Green, Amber
Warning lamp Lamp Flash
indicator states: Colour Duration
Low battery RED SHORT
Normal (no alert) GREEN SHORT
Amber alert AMBER LONG
Red alert RED LONG
Vibration alert: Rotating type
Vibrate time: 15 sec
Battery: 1x AA LR6 alkaline
Battery life: > 360h
Dimensions: 71mm x 56mm x 18mm (23mm including clip)
Weight: 70g (with a battery)
Life time: 5 years
Environmental:
Temperature operation: -40 °C to +65 °C
Temperature storage: -50 °C to +70 °C (no battery)
Humidity operating: up to 90% RH, non-condensing
Humidity storage: up to 90% RH, non-condensing
PED-1744 - User Manual - v1 - April 2022
Listen EarTM Personal
Noise Level Alert
User Manual
PED-1704-L
listen
ear
IMPORTANT NOTICE
These devices are sold with the intention
that a wearer can educate themselves about
their environment They are not intended
to make measurements as such but merely
indicate the risk to themselves of being in that
environment.
PAMBRY DISCLAIMER
Pambry Electronics reserve the right to change
specifications or update this user manual at
any time without prior notice.
Pambry Electronics Ltd
Pambry House, Units 7 & 8 Ventura Centre, Ventura Place,
Upton Industrial Estate, Upton, Poole, Dorset BH16 5SW UK
SAFETY INFORMATION
For safe practice only operate in accordance
with the instructions in this manual.
WARNING
To avoid personal injury,
follow the guidelines below:
• Do not remove cover.
• Use this device only as specified in this manual.
• Do not use around explosive gas or vapour.
• It is your responsibility to contribute to a
clean and healthy environment by using the
appropriate local return and collection systems.
• The symbol shown below indicates that
separate collection systems must be used for
any discarded equipment or batteries
marked with the WEEE Symbol.
!
