HSS Hire 49711 Troubleshooting guide

Noise Meter
Hire Shops
A hand-held device to indicate
sound levels.
Operating & Safety Guide 870
power to the unit is disconnected and any data
stored in Leq is lost.
When making Leq readings DO NOT move this or
the range switch as data stored in the Leq will
be lost.
Decide on which settings you require and adjust as
necessary, normal settings would be weighting in the
dB (A) setting and display in the SPL position.
Response & Range should be set to reflect the
information you require.
Ensure that the MAX HOLD button is in the OFF
position.
Where readings are being taken near or around
large objects, take several measurements in
different positions.
In wind speeds of 5metre per second and greater,
fit the foam wind shield to the microphone.
For accurate readings ensure the microphone is
kept still, pointed at the source of noise and held
at arms length away from the operator.
DISPLAY INDICATORS…
If one or more of the following icons show on the
BASIC TECHNIQUES
LCD, follow the information in this section the
correct the problem.
Avoid damaging the equipment, protect it from
nocks and impact damage.
When not in use, store the equipment in its carry
case somewhere clean, dry and safe from the thieves.
Switch the unit OFF and place all components
togeter in the cary case provided, ready for return
to your local HSS Hire Shop.
FINISHING OFF
EQUIPMENT CARE
Code 49711
©HSS Hire Service Group Plc 1999 No. 870/01
Group Office: 25 Willow Lane, Mitcham, Surrey CR4 4TS
Web Site: http://www.hss.co.uk
Contact your local
0845 728 2828
…any comments?
If you have any suggestions to enable us to improve
the information within this guide please fax your
comments or write to the Product Manager at the
address below
Fax: [phone]
870/01
YOU SEE WHAT IT MEANS HOW TO REMEDY
+ Amplifier Overload Move up 1 range
–- Amplifier at noise floor Move down 1 range
LO BATT Battery level low Replace batteries
: The Leq store has halted Note Leq and reset
because it is full
Calibration
Unit
Foam
Wind Shield
OFF 104 94
dB AT 1kHZ
Calibrator & Wind Sheild

For advice on the safety and suitability of this equipment
contact your local HSS Hire Shop.
This equipment should be used by an able bodied,
competent adult who has read and understood these
instructions. Anyone with either a temporary or permanent
disability, should seek expert advice before using it.
Keep children, animals and bystanders away from
the test area.
Never use this equipment if you are ill,
feeling tired, or under the influence of
alcohol or drugs.
Always switch OFF and unplug the equipment
when not in use. Never leave it switched ON and
unattended.
DO not use this equipment if it is raining or
snowing, water on the microphone will give
inaccurate readings and may permanently damage
the unit.
Always use the calibration unit before each reading
is taken.
Do not operate in temperatures greater than 40º C.
Always check the condition of the equipment
before use. IF it shows signs of damage or excessive
wear, return it to your local HSS Hire Shop.
The following information is designed to allow the
user to set the Noise Meter up correctly and to
guide him/her through its settings. It is presumed
that the user is either trained, experienced or
qualified in the use of this type of equipment.
Check that all the parts listed below are in the carry
case provided, if any are missing contact your local
HSS Hire Shop for advice.
1 x Meter
1 x Foam Wind Shield
1 x Calibration Unit
2 x Small Flat Screwdrivers
The Noise Meter is powered by 2 PP3 batteries
located behind a sliding cover at the base of the
unit. If the batteries need changing replace with either
Alkaline or Zinc Chloride, do not use any other type (this
includes rechargeable).
CONTROLS…
There are 3 push buttons on the left of the unit (see
illustration), the top button resets the LED display,
the middle resets all settings (as a refresh) and the
bottom button freezes the LED with the maximum
level reading attained.
GETTING STARTED
GENERAL SAFETY To the right are 4 slide switches, their functions are
as follows.
DISPLAY…
A 3-position switch, Leq which stores each noise
level recorded and reports the average reading.
Peak (C) for C weighted peak Pressure and SPL for
basic sound level.
The switch can be used in any position without
affecting the data stored by the Leq. You can also
set it in SPL then Peak (C) and see the information
on the LED.
Response…
A 3 position switch which allows you to set the
response speed: F = Fast, I = Impulse and S = Slow.
When set to ‘I’ the rise time constant is
35milliseconds and descent time is 1.5 seconds
and should only be used for single impulses, but
when in Impulse Max position (Impulse Time
Weighting and Max Hold Button pressed) there is no
decay time.
RANGE…
This is used to select the operating range IE:
<75 For readings from 0 to a maximum of 75dB.
50 – 100 For readings from 50dB up to a
maximum of 100dB.
>80 For reading from 80dB up to a maximum
of 140dB.
WEIGHTING SPL & LEQ…
This 3 way switch is used to select either dB (A)
(normal sound levels with ‘A’ weighted filter in
circuit), or dB (C) (normal sound levels with ‘C’
weighted filter in circuit) with the third position to
turn the unit OFF. When in the OFF position all
Calibration
The unit should be re calibrated before each
set of readings is taken.
Switch the calibrator ON and confirm that the
green lamp is illuminated and that you can
hear an audible signal.
Place the calibrator over the microphone and
select a suitable measurement range.
NOTE the calibrator produces a level @ 94dB.
Select the SPL function on the display switch
and ensure the Maximum Hold function is
switched OFF.
If necessary adjust the unit using the small
screwdriver provided. Adjustment is made by
turning the CAL screw (see illustration).
If the unit cannot be adjusted successfully,
contact your local HSS Hire Shop for advice.
Microphone
Calibration
Screw
Push
Buttons Slide
Switches
LED
Display
Noise Meter