407123 - Measuring equipment Extech - Free user manual and instructions

Product Type	Sound Level Meter
Brand	Extech
Model	407123
Category	Measuring Equipment
Dimensions	210 x 55 x 32 mm
Weight	230 g (with battery)
Power Supply	9V battery (IEC 6LR61 type)
Measurement Range	30 to 130 dB
Accuracy	±1.5 dB (at 94 dB, 1 kHz)
Weightings	A and C
Response Time	Slow and Fast
Frequency Range	31.5 Hz to 8 kHz
Main Functions	Sound level measurement, max/min, data hold, auto power off
Display	4-digit LCD with bar graph
Maintenance and Cleaning	Wipe with a dry soft cloth. Remove battery if not used for a long time.
Safety	Use the device according to the manual. Do not expose to moisture or shocks.
Spare Parts and Repairability	Contact Extech after-sales service for repair or calibration. 1 year warranty.
General Information	NIST certification available. Annual calibration recommended.

Frequently Asked Questions - 407123 Extech

How to use the Extech 407123 sound level meter?

Turn on the device, select the weighting (A or C) and response time (Fast/Slow). Place the microphone facing the sound source. Read the value on the display.
For accurate measurements, hold the device at arm's length.

What battery to use for the Extech 407123?

Use a 9V battery of type IEC 6LR61. Open the battery compartment at the back of the device by sliding the cover.

How to clean the Extech 407123 sound level meter?

Wipe the exterior of the device with a soft dry cloth. Do not use solvents or abrasive products. Remove the battery if not used for a long time.

What is the measurement range of the 407123?

The measurement range is 30 to 130 dB. For very low or very high levels, use the appropriate range (LO or HI) if available.

What do the A and C weightings mean?

The A weighting filters low frequencies to simulate the human ear. The C weighting is more linear for high sound levels.
Choose A for standard environmental measurements, C for machine noises.

How to do a maximum noise measurement?

Press the 'MAX' button to activate the maximum level recording. The display will show the highest detected value until you press the button again.

The sound level meter displays 'Err' or does not turn on

Check that the battery is properly installed and not discharged. Replace it if necessary. If the problem persists, contact Extech support.

Do I need to calibrate the Extech 407123?

Annual calibration is recommended to ensure accuracy. Extech offers NIST calibration services. Contact after-sales service.

Can I use the 407123 outdoors?

Yes, but avoid excessive humidity, rain, or extreme temperatures. Use the supplied windscreen to reduce wind noise.

How to read the results on the LCD screen?

The display shows the measured value in dB. The bar graph below provides a quick visual indication. The 'MAX', 'MIN', or 'HOLD' symbols are displayed depending on the selected mode.

USER MANUAL 407123 Extech

Congratulations on your purchase of the Extech Hot Wire Anemometer. This instrument measures air flow and temperature by placing the sensor into an airway such as a duct or a vent. The sensor is situated at the end of the telescoping wand for convenience and has a protective sliding cover. The meter includes an RS-232 PC Interface jack for use with the Model 407001 Data Acquisition software and interface cable kit. This meter is shipped fully tested and calibrated and, with proper use, will provide years of reliable service.

Description

Meter Description

1. LCD display – Indicates air velocity and temperature readings, units of measure, low battery icon, and other user alerts

2. Push-buttons:

• POWER: Turn meter ON and OFF
• HOLD: Freezes the displayed reading
• C/F: Select the temperature units
- RECORD: Press to track the highest (MAX) and lowest (MIN) reading
• RECALL: Displays MAX/MIN readings
• UNIT: Air velocity units of measure
- ZERO: Press to zero the display (sensor cover must be closed)

1. Protective holster – Rubber jacket that surrounds the meter (must be removed to access battery compartment)

2. Battery compartment - Located on the lower back of the meter

3. PC Interface jack – Accepts a 3.5mm plug from a PC interface cable (cable and data acquisition software available using part number 407001)

4. Sensor input jack – Insert the sensor plug

5. Sensor opening – Air must flow through this opening for proper measurement

6. Telescoping sensor handle – Extends to 39" (1m)

7. Sensor protective cover – Slide DOWN to open when in use and slide UP to protect sensor when not in use (close the cover when zeroing the meter)

Sensor Tip Description

1. Air Direction indentation
2. Air Velocity Sensor
3. Sensor cover in lower (measurement) open position
4. Sensor cover in upper (zero) closed position
5. Temperature sensor

Operation

Initialization and Zero

The meter should always be zeroed at temperature before use using the ZERO button. Do not rely on the initial zero display.

Notes:

• The meter does not display negative numbers.

• Open antenna to desired length.

• Connect the sensor to the input jack on top of the meter and open antenna to desired length.

• Turn on the meter using the Power button. The meter will perform a self-test during which the display will count down from 9 to 0.
• Select the desired temperature units using the C/F select button. The LCD will reflect the selection.
• Select the desired air velocity units using the UNIT button. The LCD will reflect the selection.
• Place the sensor cover in the UP (ZERO) position.
• Place the sensor in the area to be measured and allow a short time for the sensor to reach the temperature of the air under test.
• Press the ZERO button to zero the meter.

Taking Measurements

1. Zero the meter as described above.
2. Slide the air velocity sensor cover down.
3. Place the sensor in the air current to be measured. Have the air flow meet the sensor head in the direction of the indentation on the sensor head.
4. View the air velocity and temperature readings on the LCD Display. The large main LCD display indicates the Air Velocity reading. The lower LCD sub-display indicates the temperature reading.

MIN and MAX Function

1. To begin capturing the Minimum (MIN) and Maximum (MAX) readings, press the RECORD button. The 'REC' icon will appear on the LCD.
2. Take readings as described previously.
3. Press the RECALL button to view the Maximum reading encountered since the RECORD button was pressed. The 'MAX' display icon will appear along with the maximum reading.
4. Press RECALL again to view the minimum reading (MIN).
5. Press the RECORD button to exit this mode and return to normal operation.

Data Hold

To freeze the LCD display, press the HOLD button. The 'DH' display icon will appear on the LCD. Press the HOLD button again to return to normal operation (the 'DH' hold icon will switch off).

Battery Replacement

When the low battery indicator (LBT) appears on the LCD or if the LCD does not switch on when the POWER button is pressed, replace the batteries.

1. Remove the protective rubber holster that encapsulates the meter.
2. Replace the six 'AAA' 1.5V batteries observing polarity.

3. Replace the battery compartment cover and the protective holster.

4. Open the rear battery compartment by prying the compartment off with a flat-head screwdriver or a coin.

PC Interface

The meter is equipped with an RS-232 PC Interface jack at the top of the meter (next to the sensor input jack). For streaming of data to a PC via the RS232 Output jack, the optional 407001-USB kit (RS232 to USB cable and driver CD) along with the 407001 software (available free at www.extech.com) are required.

General Specifications

Circuit configuration	Custom one-chip LSI microprocessor circuit
Display	3-1/2 digit (2000 count) dual LCD display
Measurements	m/s (meters per second), km/h (kilometers per hour), ft/min (feet/per minute), knots (nautical miles per hour), MPH (miles per hour), Temperature: °C, °F
Data hold	Freezes reading on display
Sensor Structure	Air velocity sensor: Glass bead thermistorTemperature sensor: Precision thermistor
Min/Max Recording	Record and Recall Maximum (MAX) and Minimum (MIN) readings
PC Interface	RS 232 PC serial interface jack for use with Model 407001 software and interface cable kit
Operating Temperature	32 to 122°F (0 to 50 °C)
Operating Humidity	Max. 80% RH
Power Supply	Six (6) 1.5V ‘AAA’ batteries
Power Consumption	Approx. 30 mADC
Weight	0.78 lb (355 g) including batteries & probe
Dimensions	Main instrument: 7.1 x 2.8 x 1.3” (180 x 72 x 32 mm)Sensor: 0.5” (12mm) diameterTelescope: 7’ (2.1m) maximum length with cable

Range Specifications

Units	Range	Resolution	Accuracy
m/s	0.2 to 20.0 m/s	0.1 m/s	±(3.0%rdg+0.3m/s)*
km/h	0.7 to 72.0 km/h	0.1 km/h	±(3.0%rdg+1.1km/h)*
ft/min	40 to 3940 ft/min	1 ft/min	±(3.0%rdg+59ft/min)*
MPH	0.5 to 45.0 MPH 0.1 MPH ±(3.0%rdg+0.67MPH)*
knots	0.4 to 38.8 knots	0.1 knots	±(3.0%rdg+0.58knots)*
*or, ±(1.0%FS+3d) whichever is greater
Temperature	32 to 122 °F (0 to 50°C)	0.1°F and °C	3.6 °F (2 °C)

Note: m/s: meters per second; km/h: kilometers per hour; ft/min: feet per minute; Knots: nautical miles per hour; MPH: miles per hour

Area equations

The volume of air flowing through a duct or vent can be determined by taking the area of the duct in square units (i.e. square feet) and multiplying this value by the measured linear velocity (i.e., feet per minute). This gives: ft/min x ft ^2 = ft ^3 /min (CFM)

$$ \mathbf {A} = \mathbf {W} \times \mathbf {H} $$

$$ \mathbf {A} = \mathbf {p i} \times \mathbf {R} ^ {2} $$

Cubic equations

$$ \mathrm{CFM} \left(\mathrm{ft} ^ {3} / \min\right) = \text { Air Velocity } (\mathrm{ft} / \min) \times \text { Area } \left(\mathrm{ft} ^ {2}\right) $$

$$ \mathrm{CMM} \left(\mathrm{m} ^ {3} / \min\right) = \text { Air Velocity } (\mathrm{m} / \sec) \times \text { Area } \left(\mathrm{m} ^ {2}\right) \times 6 0 $$

Units Conversion Table

	m/s	ft/min		knots	km/hr
1 m/s	1	196.87	1.944	3.6	2.24
1 ft/min	0.00508	1	0.00987	0.01829	0.01138
1 knot	0.5144	101.27	1	1.8519	1.1523
1 km/hr	0.2778	54.69	0.54	1	0.6222
1 MPH	0.4464	87.89	0.8679	1.6071	1

Warranty

FLIR Systems, Inc. warrants this Extech Instruments brand device to be free of defects in parts and workmanship for one year from date of shipment (a six month limited warranty applies to 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 for authorization. Visit the website www.extech.com for contact information. A Return Authorization (RA) number must be issued before any product is returned. 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. FLIR Systems, Inc. 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. FLIR'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.

Calibration, Repair, and Customer Care Services

FLIR Systems, Inc. offers repair and calibration services for the Extech Instruments products we sell. NIST certification for most products is also provided. Call the Customer Service Department for information on calibration services available for this product. Annual calibrations should be performed to verify meter performance and accuracy. Technical support and general customer service is also provided, refer to the contact information provided below.

Support Lines: U.S. [phone]; International: [phone]

Technical Support: Option 3; E-mail: [e-mail]

Repair & Returns: Option 4; E-mail: [e-mail]

Product specifications are subject to change without notice

Please visit our website for the most up-to-date information

www.extech.com

FLIR Commercial Systems, Inc., 9 Townsend West, Nashua, NH 03063 USA

Copyright © 2014-2016 FLIR Systems, Inc.

All rights reserved including the right of reproduction in whole or in part in any form

www.extech.com

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Copyright © 2014-2016 FLIR Systems, Inc.

Copyright © 2014-2016 FLIR Systems, Inc.