Dilog Test Equipment DL7103 User Manual

DL7103

SOUND LEVEL METER

operating manual

Safety Information

Read the following safety information carefully
before attempting to operate or service the meter.

Use the meter only as specied in this manual;
otherwise, the protection provided by the meter
may be impaired.

1. Altitude up to 2000 meters

2. Relatively humidity 90% max.

3. Operation Ambient Temperature 0~40°C

Environment Conditions

1. Repairs or servicing not covered in this manual
should only be performed by qualied personnel.

2. Periodically wipe the case with a dry cloth. Do
not use abrasives or solvents on this instruments.

Meter is protected throughout by double

insulation or reinforced insulation.

When servicing, use only specied replacement

parts.

Compliance with relevant EMC directories.

Maintenance & Cleaning

Safety Symbols

General

To ensure that you can get the most from this
instruments, we recommend that you read and
follow the manual carefully before use.

This unit conforms to the IEC651 type 2, ANSI S1.4
type 2 for Sound Level Meters.

This Sound Level Meter has been designed to meet
the measurement requirements of safety Engineers,
Health, Industrial safety ofces and sound quality
control in various environments.

• Ranges from 30dB to 130dB at frequencies

between 31.5Hz and 8 KHz.

• Display with 0.1dB steps on a 4-digits LCD.

• With two equivalent weighted sound pressure

levels, A and C.

Standard applied:
IEC651 type 2, ANSI S1.4 type 2

Frequency range:

31.5Hz~8KHz

Measuring level range:

30~130dB

Frequency weighting:

A/C

Microphone:

1/2 inch electric condenser microphone

Calibration:

Electrical calibration with the internal oscillator
(1kHz sine wave).

Display:

LCD

Digital display:

LCD4 digits

Resolution:

0.1dB

Display Up data:

0.5 sec.

Time weighting:

FAST (125mS), SLOW (1 sec.)

Specications

Specications

Level ranges:

Lo: 30-100dB

Hi:
60-130dB

Accuracy:
+ 1.5dB (under reference conditions).

Alarm function:
“OVER” is shown when input is out of range.

Maximum hold:

Hold readings the Maximum Value, with decay
< 1dB / 3 minutes.

Auto power off:
Meter automatically shuts down after approx. 15
minutes of inactivity.

Power supply:
One 9V battery, 006P or IEC 6F22 or NEDA 1604.

Power life:
About 50hrs (alkaline Battery).

Operation temperature:
0 to 40°C (32 to 104°F)

Operation humidity:

10 to 90%RH

Storage temperature:

-10 to 60°C ( 14 to 140 °F)

Storage humidity:

10 to 75%RH

Dimensions:
210(L) X 55(W) X 32(H)mm

Weight: 230g (including battery)
9V battery, carrying case, Instruction manual.

Specications

Controls and Inputs

1

2

4

5

6

8

7

3

A/C

9

10

1. Windscreen: If you operate at wind speed over
10m/sec, please put protective accessories in
front of the microphone.

2. Display

Symbol Function

LCD 4 digits
MAX Maximum Value hold
OVER Over range
F Fast response
S Slow response
A A-Weighting
C C-Weighting
Lo Low Range (30~100dB)
Hi High Range (60~130dB)

BAT Low-Battery

3. Power ON/OFF Button:
Turn the meter power ON/OFF.

4. Backlight Button:
Turn the meter backlight ON/OFF.

5. A-weighting / C-weighting select button

A: A – Weighting. For general sound level

measurements.

C: C – Weighting. For checking the

low- frequency content of noise.

(If the C-Weighted level is much higher than the
A-Weighted level, then there is a large amount of
low-frequency noise).

Controls and Inputs

A/C

Controls and Inputs

6. Time weighting select button:

F (fast response):

for normal measurements (fast varying noise).

S (slow response):

for checking average level of uctuating noise

7. Level range select button:

Lo: 30~100dB;

Hi: 60~130dB

When “OVER” is indicated, the ranges switch to

another range for measurement.

8. MAX/ Hold button

The max. Hold position is used to measure

the maximum level of sound. The maximum
measured level is up dated continuously.
Press once again the button, will release the
hold and allow a further measurement.

Data Hold button: Press and hold the Button for

over 2 seconds to turn data hold function on or
off. The hold function freezes the reading in the
display.

9. Microphone:

1/2 inch Electric Condenser microphone.

10. Battery Cover

F/S

Lo/Hi

Max/

Hold

Battery loading:

Remove the battery cover on the back and

put in one 9V Battery.

Battery Replacement:

When the battery voltage drops below the

operating voltage, mark “BAT” appears. If it
appears, battery should be replaced with a
new one.

Replacing & Installing the Battery

Operating Precautions

1. Wind blowing across the microphone would
create additional extraneous noise.

If using the instrument in the presence of wind,

it is advisable to mount the windscreen to avoid
extraneous signals.

2. To achieve more accurate measurement, use an
extension cable to separate the Microphone from
the main body so that the effect of unexpected
sound reection can be eliminated.

3. Calibrate the instrument before operation if
the instrument is not in use for a long time or
operated at bad environment.

4. Do not store or operate the instrument at high
temperature and high humidity environment.

5. Keep microphone dry and avoid severe vibration.

6. Take the battery out and keep the instrument in
low humidity environment. When not in use.

1. Open battery cover and install a 9-volt battery in
the battery compartment.

2. Turn on power and select the desired response
Time and weighting. If the sound source consists
of short bursts or only catching sound peak, set
response to FAST. To measure average sound,
use the slow setting. Select A- weighting for
general noise sound level and C-weighting for
measuring sound level of acoustic material.

3. Select desired Level.

4. Hold the instrument comfortably in hand or x
on tripod and point the microphone at the
suspected noise source, the sound pressure
level will be displayed.

5. When MAX (maximum hold) mode is chosen.
The instrument captures and holds the maximum
noise level for a long period using any of the time
weightings and ranges.

6. When HOLD (data hold )mode is chosen. The
hold function freezes the reading in the display.
Press the HOLD button momentarily to activate
or to exit the HOLD function.

7. Turn OFF the instrument and remove and remove
battery when not in use.

Measurement

Calibration Procedures

Using a standard Acoustic Calibrator
(94dB, 1kHz Sine wave)

Screwdriver

1. Make the following buttons and function switch

settings.

Display: dB, A, Hi or Lo, F

Function: A-Weighting

Response Time: FAST

Level range:

30 to 100dB (Lo) or 60 to 130dB (Hi)

Measurement mode:

MAX Hold and Data Hold Mode function disable.

2. Insert the microphone housing carefully into the
insertion hole of the calibrator.

3. Open battery cover and remove the battery to
adjust the CAL94dB potentiometer of the unit.
The level display will indicate the desired level.

Calibration Procedures

Warranty & Maintenance

Di-Log Test Equipment

28 Wheel Forge Way,
Trafford Park,
Manchester

M17 1EH, UK

tel: + 44 161 87 7 0322 fax: + 44 161 877 1614

email: [e-mail] website: www.dilog.co.uk

24 Month Warranty

Di-Log instruments are subject to stringent quality controls.
If in the course of normal daily use a fault occurs we will
provide a 24 month warranty (only valid with invoice).

Faults in manufacture and materials defect will be rectied
by us free of charge, provided the instrument has not been
tampered with and returned to us unopened.

Damage due to dropping abuse or misuse is not covered by
the warranty.

Outside the warranty period we offer a full repair and
re-calibration service.

Maintenance

WARNING Do not attempt to repair or service you meter

unless you are qualied to do so and have the relevant
calibration, performance test and service information.
To avoid electrical shock or damage to the meter do not
get water inside the case.

Periodically wipe the case with a damp cloth and mild
detergent. Do not use chemical solvent.

Clean the input terminal with cotton bud, as dirt or moisture
in the terminal affect readings.