Advertisement
much higher than the A-weighed level, then there is a large amount of low
frequency noise.)
4.Setting the Maximum Level Hold
Slide switch: MAX / RESET
The MAX Hold is used to measure the maximum level of sounds. The
maximum measured level is indicated continuously.
To reset the maximum level indication and enter the new measurement, set
the slide switch to RESET position.
5. Using the AC and DC Output Jack
AC Output:
Serves to supply AC signals (approx.1.0Vrms at the top
of the selected measurement range) to external
equipment.
DC Output:
Serves to supply DC signals (approx.10mV/dB) to
external equipment.
6. Using the Tripod Mounting Screw-Nut
For long-term measurements, the meter can be mounted on a tripod.
(1) Remove the screw from the back of the meter.
(2) Replace the screw by the tripod mounting Screw-Nut.
(3) Use the tripod mounting screw fixed to the tripod mounting Screw-Nut.
3
2
Martindale Electric will carry out routine calibration (on a chargeable basis) if the
instrument is returned, carriage paid, to the address on the final page of this
document. Alternatively, a chargeable collection and return service is available.
Repair & Service
There are no user serviceable parts in this unit. Return to Martindale Electric
Company Ltd if faulty. Our service department will promptly quote to repair any
faults that occur outside the warranty period.
Storage Conditions
The unit should be kept in warm, dry conditions away from direct sources of
heat or sunlight, with the battery removed and in such a manner as to preserve
the working life of the unit. It is strongly advised that the unit is not kept in a tool
box where other tools may damage it.
Warranty
Faults in manufacture and materials are fully guaranteed for 2 years from date
of invoice and will be rectified by us free of charge, provided the unit has not
been tampered with and is returned to us with its housing unopened. Damage
due to dropping, abuse or misuse is not covered by the guarantee. Nothing in
these instructions reduces your statutory rights.
MEASUREMENT CONSIDERATIONS
1. Background Noise
If the level difference between the absence and presence of the sound to be
measured is 10dB or more, the influence of background noise may be
disregarded. If the difference is less, a correction as shown below should be
applied.
Level difference (dB)
Compensation value (dB)
2. Reflection
The microphone should be placed well away from reflective surfaces such as
walls or the floor, in order to eliminate errors due to reflections. When making
sound measurements, hold the meter at arms length. This will help to avoid
both reflections from your body and also blocking of sound from some
directions.
3. Make sure that nothing obstructs the noise source.
4. Be careful not to accept readings if the meter is under or over loaded.
MAINTENANCE
Battery Replacement
Power is supplied by four 1.5V (AAA size) batteries. The symbol " " appears on
the LCD display when replacement is needed. To replace the batteries, remove
the screw from the back of the meter and lift off the battery cover case. Remove
the batteries from battery the contacts.
Cleaning
Periodically wipe the case with a damp cloth, do not use abrasives or solvents.
5
6
Martindale Electric Company Ltd was founded in 1928 and
manufactures a large range of electrical test equipment.
G
16th Edition Testers
G
All-In-One Testers
G
Calibration Equipment
G
Continuity Testers
G
Electrician's kits
G
Full Calibration & Repair Service
G
Fuse Finders
G
Digital Clamp Meters
G
Digital Multimeters
G
Microwave Leakage Detectors
G
Motor Maintenance Equipment
G
Non-trip loop testers
G
Pat testers & Accessories
G
Phase rotation
G
Proving units
G
Socket Testers
G
Thermometers & Probes
G
Test Leads
G
Voltage Indicators
+
G
Specialist Metrohm testers (4 & 5kV)
G
Specialist Drummond testers
Martindale Electric Company Limited
Metrohm House, Penfold Trading Estate, Imperial Way, Watford, WD24 4YY.
Tel: +44 (0)1923 441717 Fax: +44 (0)1923 446900
E-mail: sales@martindale-electric.co.uk
Website: www.martindale-electric.co.uk
7
4
5
6
7
8
-2.2 -1.7
-1.3
-1
-0.8 -0.7
E+OE. © Martindale Electric Co. Ltd. 2004
9
10
0
Advertisement
