Extech Instruments SL130 Bedienungsanleitung

User's Manual

Sound Level Alert

Model SL130

Meets ANSI and IEC Type 2 Sound Level Meter Standards

Settable High Limit with large bright High/Low indication and Alarm Output

Wall or Desk mountable

Extra large LCD display with bargraph

Maximum level display with time stamp

Optional alarm kit drives remote over limit indicators.

Version 3.1 1/06

Introduction

Congratulations on your purchase of the Extech SL130 Sound Level Alert. Designed for

wall mount, desk, tripod mount or hand held operation, this meter meets ANSI and IEC

Type 2 Sound Level Meter standards. Included is a High/Low Limit Set Point with 4 two

color high intensity LED limit exceed indicators and a large OVER indication when the set

level is exceeded. An Alarm Output can be used in conjunction with the optional Alarm

Module Kit to power a larger or a remote indicating device such as a “QUIET” sign.

Professional features include programmable A/C Weighting and Fast/Slow Response time,

Max Memory with time stamp, and a Clock display. The microphone can be rotated 180

degrees to accommodate any meter location or it can be placed at a remote location using

the optional Remote Microphone Cable. A programmable ON/OFF time extends battery life

to 30 days when programmed 8 hours per day. The bright LED’s are functional only when

the AC power adaptor is used. Careful use of this meter will provide years of reliable

service.

Specifications

Applicable standards Meets IEC 60651-1979 and ANSI S1.4 1983 Type 2

SLM standards

Display 11.7 x 7.94cm (4.6” x 3.125”) multifunction LCD

Frequency bandwidth 31.5 Hz to 8 KHz

Microphone 0.5” Electret Condensor Microphone (remoteable)

Measurement ranges 30 to 80dB, 60 to 110dB, 80 to 130dB

Frequency weighting ‘A’ and ‘C’

Response time Fast (125ms) / Slow (1s)

Resolution 0.1dB

Max Hold Maximum reading is displayed with time stamp

Alarm output 3.5mm Mono Phone Plug, 3.4mA @ 5 Vdc, typical

Limit range 30 to 130dB

Under range indication “- - -“

Over range indication “OL”

Power AC adaptor (9V@500ma) or 8 AA batteries

Battery life 240hrs continuous (approx); 30 days @ 8hrs/day

(LED’s are not functional when battery powered)

Operating temperature 0 to 50oC (32 to 122oF)

Operating humidity Less than 80% RH

Dimensions / Weight 22x18x3.2mm / 285g (8.75x7.1x1.25" / 0.63 lbs).

Version 3.1 1/06

30-80

LIMIT

80-130

60-110

123456

Meter Description

1. Microphone

2. Over Limit Display

3. Bargraph

4. dB display

5. OFF/ON/AUTO switch

6. Alert LEDs

7. Clock display

8. Max level display with time stamp

9. Set limit

10. MAX RESET button

Rear Control Panel

1. Range select switch

2. Time set buttons

3. Limit set buttons

4. Calibration adjustment

5. A/C select button

6. F/S select button

Side Panel

1. Alert switch – Green position

2. Alert switch – Red-Green position

3. Alert switch – Red position

4. High-Low Alarm switch

5. Remote Alarm output connector

6. AC adaptor connector

Rear Panel

1. Tilt stand

2. Battery compartment

3. AC Adaptor connector

4. Remote Alarm output connector

5. Windscreen

Version 3.1 1/06

Sound Level Monitor Operation

Measurement Considerations

1. Use a windscreen to cover the microphone in windy conditions.

2. Calibrate the meter often, especially if the meter has been idle for a long period of time.

3. Do not store/operate the meter in areas of high temperature or humidity.

4. Keep the meter and the microphone dry.

5. Avoid severe vibration when using the meter.

6. Remove the battery when the meter will be stored for long periods of time.

Initial Configuration

1. Connect the AC adaptor to the side or rear AC adaptor connector

OR Install 8 AA batteries

2. Setting the TIME

a) Press and Hold the Time SET button until the hours display

begins to flash.

b) Press the Time up arrow button until the hour is set.

c) Press the SET button. The minutes display will flash. Adjust as needed.

d) Press the SET button to step through and the arrow button to adjust;

Time of day Hour

Time of day Minutes

Time of day AM / PM / 24 Hour

Year

Month

Day

Auto ON Hour

Auto ON Minutes

Auto OFF Hour

Auto OFF Minute

A/C Frequency Weighting

Change the Frequency Weighting by pressing the 'A/C' button. The 'A' or 'C' icon will

appear on the display.

With ‘A’ weighting selected, the frequency response of the meter is similar to the response

of the human ear. ‘A’ weighting is commonly used for environmental or hearing

conservation programs such as OSHA regulatory testing and noise ordinance law

enforcement. ‘C’ weighting is a much flatter response and is suitable for the sound level

analysis of machines, engines, etc.

Most noise measurements are performed using 'A' Weighting and SLOW Response.

Slow/ Fast Response

Press the button to select Fast or Slow response as desired. F or S will appear in the

bottom of the LCD display.

Select FAST to capture noise peaks and noises that occur very quickly. Select the SLOW

response to monitor a sound source that has a consistent noise level or to average quickly

changing levels.

Select Slow response for most applications.

Version 3.1 1/06

Range Selection

Slide the Range switch to the 30-80, 60-110 or the 80-130 position.

The selected range will be indicated on the LCD bargraph. If the

measured dB level exceeds the range selected “OL” will be

displayed. If the measured dB level is below the selected range “- - -“ will be

displayed.

Normally, select the range in which the upper dB level is greater than any

expected sound pressure level. The 60 to 110dB range is the most commonly

used range. Use the 30 to 80dB range in quieter areas such as offices and

classrooms.

Note: When the range is changed the Max display may indicate an overload “OL”. Press

the MAX RESET button to clear the MAX display.

High Limit Set

Press the up or down LIMIT arrow buttons to set the High/Low limit

set=point as displayed on the LCD. If the measured dB level

exceeds the set limit, the indication will appear in the display

and the over limit signal will appear at the alarm output connector.

The display indication and output signal will remain active as long as the sound pressure

level exceeds the set limit.

High/Low LED Alert

The four LEDs are used to alert users when a sound level either exceeds or goes below

the Limit set-point. This feature is available only while the AC adaptor is used to power the

meter. It is disabled under battery power.

The LEDs will provide a steady or flashing colored indication depending on the setting of

the side panel ALARM and Alert switch settings.

The three Alert switch positions are: (1) RED, (2) RED-GREEN, (3) GREEN

Alarm

Switch Alert Switch LED response

Red (1) LED’s flash red while dB level exceeds set point.

Red-Green (2) LED’s flash red while dB level exceeds set point.

40 second green indication when level transitions from

high to low.

High

ALARM

Green (3) 40 second green indication when level transitions from

high to low.

Green (3) LED’s are green while dB level is below set point.

Red-Green (2) LED’s are green while dB level is below set point.

40 second flashing red indication when level

transitions from low to high.

Low

ALARM

Red (3) 40 second flashing red indication when level

transitions from low to high.

Version 3.1 1/06

MAX Hold

The MAX display indicates and holds the highest dB level measured

since the meter was turned on or since the Max Reset button was

pressed. The time and date of the max reading is also displayed.

To clear the display and start a new measurement session, press the

front panel MAX RESET button. If the measured level exceeds the

maximum for the range selected the MAX display will indicate “OL” (overload).

Programmable OFF/ON/AUTO time

The meter is powered by 8 AA batteries or via an AC adaptor for permanent installations.

Continuous battery life is approximately 240 hours (10 days). By programming the ON/OFF

time, the battery life can be greatly extended (30 days assuming an 8 hour day). The ON

and OFF times are programmed as described in the initial configuration

paragraph. The meter will operate continuously with the power switch in

the ON position. The ON/OFF time will be controlled by the meter when

the power switch is set to the AUTO position.

Calibration

The sound level meter should be calibrated on a regular basis

to assure that the meter’s performance and microphone

sensitivity has not change. Some operational directives

require daily calibration checks (OSHA). Extech offers several

acoustic calibrators to perform the calibration.

1. Set the meter to the 60 to 110dB or 80 to 130dB range.

2. Place the external calibrator over the Sound Level

Monitor's microphone and turn the Calibrator on.

3. The meter should read close to the calibrator's dB output

level. Typical Calibrator output levels are 94dB and 114dB.

4. If the meter is within ± 0.2 dB of the calibrator’s output, no

adjustment is necessary.

5. Adjust the calibration pot on the rear of the meter to the

proper level.

Meter Placement

The meter can be used Handheld, Wall mounted, Desk mounted or Tripod mounted. For

wall mount operation, orient the microphone perpendicular to the wall to minimize the

affect of acoustic reflections. For desk mounting, extend the rear legs and lock in place

with the hinged locks. The tripod mounting nut is located on the bottom of the unit.

Version 3.1 1/06

Remote Microphone (optional)

The optional 15’ remote microphone

cable can be used to place the microphone in one

location while viewing the dB levels and/or generating a high limit

alarm at another location. To remove the microphone, unscrew

the holding collar and lift the microphone off the connector. The

extension cable can then be plugged into the matching

connectors. Calibration should be performed after the cable is

installed.

Alarm Output (optional)

The alarm output drives the optional Remote Alarm Relay Module (cable and relay) when

the LIMIT set point is exceeded. The relay module can be used to power external warning

signs, “QUIET” signs or other indicating devices when the sound level is higher than the

programmed limit. Refer to the manual supplied with the module for connection

information.

Rear AC Adaptor and Alarm outputs.

Version 3.1 1/06



Support line (781) 890-7440

Technical support: Extension 200; E-mail: support@extech.com

Repair & Returns: Extension 210; E-mail: [email protected]

Product specifications subject to change without notice

For the latest version of this User’s Guide, Software updates, and other

up-to-the-minute product information, visit our website: www.extech.com

Battery Replacement

AC power is the normal power source for this meter. If 8 AA batteries are used, they are

located in the rear battery compartment. When the battery icon appears on the meter's

LCD, it is time to replace the batteries.

1.Turn power off.

2.Open the rear battery cover

3.Insert the batteries into battery holder, observing the correct polarity.

4.Put the battery cover back in place.

Calibration and Repair Services

Extech offers complete repair and calibration services for all of the products we sell.

For periodic calibration, NIST certification or repair of any Extech product, call customer

service for details on services available. Extech recommends that calibration be performed

on an annual basis to insure calibration integrity.

Warranty

EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and

workmanship for one year from date of shipment (a six month limited warranty applies on sensors and

cables). If it should become necessary to return the instrument for service during or beyond the warranty

period, contact the Customer Service Department at (781) 890-7440 ext. 210 for authorization or visit our

website at www.extech.com (click on ‘Contact Extech’ and go to Service Department to request an RA

number). A Return Authorization (RA) number must be issued before any product is returned to Extech. The

sender is responsible for shipping charges, freight, insurance and proper packaging to prevent damage in

transit. This warranty does not apply to defects resulting from action of the user such as misuse, improper

wiring, operation outside of specification, improper maintenance or repair, or unauthorized modification.

Extech specifically disclaims any implied warranties or merchantability or fitness for a specific purpose and

will not be liable for any direct, indirect, incidental or consequential damages. Extech's total liability is limited

to repair or replacement of the product. The warranty set forth above is inclusive and no other warranty,

whether written or oral, is expressed or implied.

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