Larson Davis EPS2116 Reference Manual

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EPS2116

Outdoor Microphone & Preamplifier Protection

Larson Davis

EPS2116 Environmental

Protection System

Reference Manual

IEPS2116.01 Rev D i-2

Copyright 2018, by PCB Piezotronics, Inc. This manual is copyrighted, with all rights reserved. The manual may not be copied in whole or in part for any use without prior written consent of PCB Piezotronics, Inc.

Disclaimer

The following paragraph does not apply in any state or country where such statements are not agreeable with local law:

Even though PCB Piezotronics, Inc. has reviewed its documentation, PCB Piezotronics Inc. makes no warranty or representation, either expressed or implied, with respect to this instrument and documentation, its quality, performance, merchantability, or fitness for a particular purpose. This documentation is subject to change without notice, and should not be construed as a commitment or representation by PCB Piezotronics, Inc.

This publication may contain inaccuracies or typographical errors. PCB Piezotronics, Inc. will periodically update the material for inclusion in new editions. Changes and improvements to the information described in this manual may be made at any time.

Safety

If the equipment is used in a manner not specified by Larson Davis, the protection provided by the equipment may be impaired.

Recycling

PCB Piezotronics, Inc. is an environmentally friendly organization and encourages our customers to be environmentally conscious. When this product reaches its end of life, please recycle the product through a local recycling center or return the product to: PCB Piezotronics, Inc. Attn: Recycling Coordinator

1681 West 820 North Provo, Utah, USA 84601-1341 where it will be accepted for disposal

Warranty

For warranty information, refer to our Terms and Conditions of Sale on our website, www.larsondavis.com/TermsConditions.aspx.

i.1 Contact Larson Davis

Website

www.larsondavis.com

Worldwide Corporate Headquarters

Larson Davis - a PCB Piezotronics division 3425 Walden Avenue Depew, NY 14043-2495 USA Toll-free (in the US): 888-258-3222 Phone: 716-926-8243 USA fax: 716-926-8215 E-mail: sales@larsondavis.com

EPS2116 Reference Manual 1-1

Table of Contents

Module 1 Overview 1-1

1.1 Getting Started ................................................................................................................................. 1-1

1.2 What is the EPS2116? .......................................................................................................................1-1

Module 2 Assembly & Mounting 2-1

2.1 Overview ........................................................................................................................................... 2-1

2.2 Assembly .......................................................................................................................................... 2-1

Module 3 Operations 3-1

3.1 Calibration ....................................................................................................................................... 3-1

3.2 Windscreen Replacement ............................................................................................................... 3-3

3.3 Desiccant Replacement ...................................................................................................................3-5

Appendix A Technical Specifications A-1

A.1 Standards Met by EPS2116 ..............................................................................................................A-1

A.2 Included Accessories .......................................................................................................................A-2

A.3 Optional Accessories .......................................................................................................................A-2

A.4 Physical Specifications ....................................................................................................................A-2

A.5 EPS2116 Dimensions .......................................................................................................................A-3

A.6 Wind-induced Noise ......................................................................................................................... A-4

A.7 EPS2116 Corrections .......................................................................................................................A-5

A.8 Acoustical Response ........................................................................................................................A-8

EPS2116 Reference Manual Getting Started 1-1

Module 1 Overview

1.1 Getting Started ....................................................................................................................1-1

1.2 What is the EPS2116? ..........................................................................................................1-1

1.1 Getting Started

The EPS2116 is an environmental protection system accessory that provides complete weather protection to your ½ inch microphone and microphone preamplifier.

Before you begin working with the EPS2116, read an overview of its capabilities and learn how to assemble, mount, and calibrate the device to optimally perform your tasks.

1.2 What is the EPS2116?

The EPS2116 protects your microphone if it is exposed to wind, rain, and humidity during the data collection period.

The EPS2116 can help accomplish your tasks:

• If you deploy the microphone in unpredictable weather, the water-repellent membrane in the EPS2116 will protect it from rain, sleet, and snow

• In high humidity environments, desiccant cartridges can be inserted to preserve performance

• Birds are unable to land on your device and are effectively deterred by the built-in bird-spike.

It works with back-vented microphones in particular, in which static air pressure reaches the back of the microphone from an opening inside the device. Moist air passes through the desiccant before reaching the preamplifier and the back of the microphone.

The EPS2116 is intended to be connected on a threaded ¾ inch conduit, 1½ inch (38mm) speaker stand, or similar mating connector when in use. The whole assembly can be fastened on a mounting screw for tripod use in the field. The EPS2116 is a necessary tool for environmental exposure sound monitoring.

EPS2116 Reference Manual What is the EPS2116? 1-2

FIGURE 1-1 EPS2116

Birdspike

Windscreen

Top

Base

Adapter

EPS2116 Reference Manual Overview 2-1

Module 2 Assembly & Mounting

2.1 Overview ..............................................................................................................................2-1

2.2 Assembly ..............................................................................................................................2-1

2.1 Overview

The EPS2116 must be assembles and disassembled in a proper order to not compromise the integrity of the protection devices. The EPS2116 comes shipped with the base and the top separate, and the windscreen and birdspike together.

2.2 Assembly

The EPS2116 will come shipped with the top, birdspike, and windscreen attached, along with the base and adapter together.

FIGURE 2-1 EPS21116 as shipped

The fist step will be to assemble the pieces so they are ready for the cable and preamplifier. To do this, follow these steps:

CAUTION Do not pull the

windscreen off the birdspike with an upward motion. If you have to separate, pull the windscreen down and the birdspike up.

Step 1 Hold the top with one hand, grip the windscreen and

birdspike, at windscreen middle, gently twist apart.

EPS2116 Reference Manual Assembly 2-2

FIGURE 2-2 Grip windscreen to birdspike, unscrew

TAKE NOTE If using the

PRM2103, desiccant is not required as the preamplifier uses built-in heaters to control humidity within the microphone and preamplifier

Step 2 If using desiccant cartridges, insert four stacks of five into

the desiccant chambers in the base. Use one indicating desiccant for the first use. And when you change them, use the second indicating.

FIGURE 2-3 Desiccant install

Step 3 Screw top onto base.

FIGURE 2-4 Screw top onto base

EPS2116 Reference Manual Assembly 2-3

Step 4 Thread CBL222 up through adapter, base, and top. Then

attached preamplifier/microphone to cable.

FIGURE 2-5 Thread cable, add preamp/mic

Step 5 If you are mounting the EPS2116 to a tripod, pole, or other

device, screw the device onto the bottom at this step, being careful not to twist the cable. Hold the EPS2116 still and twist the mounting device up into the EPS2116.

Step 6 Push preamp/mic down until the mic is fully seated at the

top. Do not pull cable down.

FIGURE 2-6 Push microphone down

EPS2116 Reference Manual Assembly 2-4

Step 7 Grip windscreen in middle, holding birdspike, screw onto

assembly.

FIGURE 2-7 Windscreen

Once assembled, the EPS2116 can be left in place during calibration or transport.

EPS2116 Reference Manual Calibration 3-1

Module 3 Operations

3.1 Calibration ...........................................................................................................................3-1

3.2 Windscreen Replacement ...................................................................................................3-3

3.3 Desiccant Replacement ...................................................................................................... 3-5

3.1 Calibration

To calibrate microphones in the EPS2116, follow these steps:

TAKE NOTE The microphone

and preamplifier can be pulled up if needed to allow the microphone to seat fully inside the calibrator, though this is not necessary when using the CAL200 or CAL250.

Step 1 Remove birdspike and windscreen by unscrewing the

assembly.

FIGURE 3-1 Remove birdspike

Step 2 Place the calibrator (CAL250 shown) on the microphone by

pushing down gently while slightly twisting clockwise.

EPS2116 Reference Manual Calibration 3-2

FIGURE 3-2 CAL250 on mic

Step 3 Perform calibration as described in sound level meter

manual.

Step 4 Remove calibrator by pulling it up while slightly twisting it

counter-clockwise.

Step 5 Replace birdspike and windscreen.

FIGURE 3-3 Replace windscreen

EPS2116 Reference Manual Windscreen Replacement 3-3

3.2 Windscreen Replacement

To replace the windscreen, follow these steps:

CAUTION Removing the

windscreen by pulling it over the top of the birdspike can damage the rainscreen.

Step 1 Remove birdspike and windscreen by unscrewing the

assembly. Grip windscreen/birdspike and twist off.

FIGURE 3-4 Remove windscreen

Step 2 Remove windscreen from bottom of birdspike.

FIGURE 3-5 Remove windscreen from birdspike

Step 3 Screw birdspike back on top.

EPS2116 Reference Manual Windscreen Replacement 3-4

FIGURE 3-6 Return birdspike to top

Step 4 Place new windscreen over birdspike.

FIGURE 3-7 Push windscreen

Step 5 Push windscreen down until the bottom aligns with

windscreen seating line.

EPS2116 Reference Manual Desiccant Replacement 3-5

3.3 Desiccant Replacement

To replace the desiccants, follow these steps:

Step 1 Remove windscreen and birdspike by unscrewing it from

the top.

FIGURE 3-8 Remove top

Step 2 Gently pull mic and preamp through the EPS2116.

Disconnect preamplifier from cable.

FIGURE 3-9 Pull cable up

EPS2116 Reference Manual Desiccant Replacement 3-6

Step 3 Replace desiccant cartridges. Discard the old and replace

with new.

FIGURE 3-10 Replace desiccants

Step 4 Screw top back onto base. Connect preamplifier to cable,

and push down until seated, do not pull.

FIGURE 3-11 Replace top and preamp

Step 5 Place windscreen/birdspike over top and screw on. You do

not need to over-tighten.

CAUTION Do not let the

cable slip down into the base, it may be difficult to retrieve.

EPS2116 Reference Manual A-1

Appendix

A Technical Specifications

A.1 Standards Met by EPS2116 .................................................................................................A-1

A.1.1 Sound Level Meter Standards ..............................................................................A-1

A.1.2 Safety Requirements ............................................................................................A-1

A.2 Included Accessories ...........................................................................................................A-2

A.3 Optional Accessories ...........................................................................................................A-2

A.4 Physical Specifications .......................................................................................................A-2

A.5 EPS2116 Dimensions ...........................................................................................................A-3

A.6 Wind-induced Noise ............................................................................................................A-4

A.7 EPS2116 Corrections ...........................................................................................................A-5

A.8 Acoustical Response ...........................................................................................................A-8

A.8.1 Reference Direction ..............................................................................................A-8

A.8.2 EPS2116 Responses with Free-Field (0°) Correction .........................................A-10

A.8.3 EPS2116 Responses with Random Response (diffuse) Correction ..................A-15

A.8.4 EPS2116 Responses with 90° Correction ...........................................................A-19

Values specified are typical unless tolerances are provided.

A.1 Standards Met by EPS2116

A.1.1 Sound Level Meter Standards

When used with the Larson Davis Model 831 or LxT versions, the EPS2116 can be used as part of a Class 1 or 2 measurement system, according to IEC 61672-1:2013 and ANSI S1.4-2014, when the appropriate microphone correction is used.

A.1.2 Safety Requirements

Compliance Standard

All IEC 61010-1 (2010): Safety requirements for electrical

equipment for measurement, control, and laboratory use

IP 55 IEC 60529 (2001): Degrees of Protection Provided by Enclosures

NEMA 4 NEMA 250 (2008): Enclosures for Electrical Equipment

2002/95/EC (RoHS 1) RoHS: The Restriction of Hazardous Substances Directive

EPS2116 Reference Manual A-2

A.2 Included Accessories

A.3 Optional Accessories

*Desiccant cartridges contain 0.05% cobalt chloride and are suitable for use in Europe.

A.4 Physical Specifications

CAUTION Although non-toxic, the desiccant cartridges are not edible. Keep away from children and pets.

Parts Quantity Accessories

WS011 2 Windscreen for EPS2116

M2116.01 1 Camera/instrument tripod adaptor

ADP103 1 EPS2116 to TRP003 adaptor

I2116.01 1 CD with instruction manual

Parts Accessories

TRP001 Camera/instrument tripod

TRP003 Tripod, maximum height 8 feet, for use with portable noise monitoring

systems and ADP034

TRP019 Permanent, tilt-down pole use with ADP100

TRP020 Semi-permanent tripod use with ADP100

DSC003 50 non indicating desiccant cartridges* & 2 indicating desiccants

ADP100 Adaptor connecting EPS2116 to TRP019 or TRP020. Connects 3/4”-14

NPSM (ISO 228-G 3/4) to 1 1/2” BSPF (ISO 228-G 1.5).

CAL200 Class 1 acoustic calibrator for 1/2” microphones

Dimensions

Windscreen/birdspikes

Height 24.0 cm (9.5”) ; O.D. 7 cm (3.0”)

Tota l Height

42.55 cm (16.75”)

Desiccant Chamber

Height 8.3 cm (3.3”); O.D. 4.2 cm (1.6"); I.D. 1.5 cm ( 0.6”)

Mounting

3/4” standard solid wall PVC conduit thread (female)

Weight

Windscreen/birdspikes

32 g (1.1 oz.)

Body

176 g (6.2 oz.)

Desiccant cartridges

20 g (0.70 oz.)

To ta l

340 g (12.0 oz.)

EPS2116 Reference Manual A-3

A.5 EPS2116 Dimensions

FIGURE A-1 EPS2116 Dimensions

EPS2116 Reference Manual A-4

A.6 Wind-induced Noise

The following show data for the self-generated noise created by the EPS2116 due to wind.

MPH m/s A-weighted Level (dB)

52.3 26.7

10 4.5 36

15 6.7 44.2

20 8.9 51.4

25 11.2 57.6

30 13.4 63

35 15.6 67.6

40 17.9 71.7

45 20.1 75.1

50 22.4 78.2

55 24.6 81

60 26.8 83.4

65 29.1 85.8

70 31.3 88.1

75 33.5 90.4

80 35.8 92.9

85 38 95.7

90 40.2 98.9

95 42.5 102.5

100 44.7 106.6

105 47 111.4

110 49.1 117

115 51.4 123.4

120 53.6 130.7

EPS2116 Reference Manual A-5

FIGURE A-2 Wind Induced Noise Graph

A.7 EPS2116 Corrections

The following graph and table display corrections for the effects of the microphone and EPS2116 that are available with the Larson Davis Model 831 and LxT sound level meters.

100

120

140

m/s 2.3 4.5 6.7 8.9 11.2 13.4 15.6 17.9 20.1 22.4 24.6 26.8 29.1 31.3 33.5 35.8 38 40.2 42.5 44.7 47 49.1 51.4

MPH 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115

A-weighted Level (d%)

EPS2116 Reference Manual A-6

Frequency

FF:RI

2106/8

FF:FF

2106/8

FF:90

2106/8

RI:FF FF:RI

FF:FF

2116

FF:RI

2116

FF:90

2116

63.10 -0.16 -0.03 -0.00 0.07 -0.06 0.13 -0.03 -0.01

79.43 -0.16 -0.04 -0.01 0.06 -0.07 0.12 -0.03 -0.00

100.00 -0.16 -0.04 -0.00 0.07 -0.07 0.13 -0.02 -0.00

125.89 -0.16 -0.03 -0.00 0.07 -0.06 0.13 -0.02 0.00

158.49 -0.16 -0.03 0.00 0.07 -0.07 0.12 -0.02 -0.01

199.53 -0.16 -0.04 -0.00 0.07 -0.07 0.12 -0.02 -0.00

251.19 -0.15 -0.03 -0.00 0.07 -0.06 0.12 -0.02 -0.00

316.23 -0.15 -0.03 -0.00 0.07 -0.06 0.12 -0.02 -0.00

398.11 -0.13 -0.03 0.00 0.07 -0.05 0.11 -0.01 -0.00

501.19 -0.12 -0.03 0.00 0.06 -0.05 0.10 -0.01 -0.00

630.96 -0.10 -0.02 -0.00 0.04 -0.04 0.07 -0.01 -0.00

794.33 -0.06 -0.01 0.00 0.03 -0.02 0.04 -0.01 -0.00

1000.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1059.25 0.02 0.00 -0.00 -0.01 0.01 -0.01 0.00 0.00

1122.02 0.04 0.01 -0.00 -0.02 0.02 -0.03 0.00 0.00

1188.50 0.06 0.02 -0.00 -0.03 0.03 -0.05 0.01 0.00

1258.93 0.09 0.02 -0.00 -0.04 0.04 -0.07 0.01 0.00

1333.52 0.12 0.03 0.00 -0.06 0.05 -0.09 0.01 0.01

1412.54 0.15 0.04 -0.00 -0.07 0.07 -0.11 0.02 0.01

1496.24 0.19 0.05 -0.00 -0.09 0.08 -0.13 0.02 0.01

1584.89 0.23 0.06 -0.00 -0.11 0.10 -0.15 0.03 0.01

1678.80 0.28 0.07 0.00 -0.14 0.12 -0.18 0.03 0.02

1778.28 0.33 0.08 -0.00 -0.16 0.14 -0.21 0.04 0.02

1883.65 0.38 0.10 -0.00 -0.19 0.17 -0.24 0.04 0.03

1995.26 0.44 0.11 -0.00 -0.23 0.20 -0.26 0.05 0.03

2113.49 0.51 0.13 -0.00 -0.26 0.23 -0.29 0.06 0.04

2238.72 0.58 0.15 -0.00 -0.30 0.26 -0.32 0.06 0.06

2371.37 0.67 0.18 0.00 -0.35 0.30 -0.35 0.07 0.07

2511.89 0.75 0.21 -0.00 -0.40 0.34 -0.37 0.08 0.08

2660.73 0.85 0.24 -0.00 -0.46 0.39 -0.39 0.09 0.10

2818.38 0.96 0.28 0.00 -0.53 0.45 -0.41 0.11 0.13

EPS2116 Reference Manual A-7

2985.38 1.07 0.32 0.00 -0.60 0.51 -0.42 0.12 0.15

3162.28 1.19 0.37 -0.00 -0.69 0.58 -0.42 0.14 0.18

3349.65 1.33 0.42 0.00 -0.78 0.65 -0.42 0.16 0.22

3548.13 1.47 0.48 -0.00 -0.89 0.73 -0.40 0.18 0.26

3758.37 1.62 0.55 -0.00 -1.00 0.83 -0.38 0.20 0.31

3981.07 1.78 0.64 0.00 -1.13 0.93 -0.35 0.23 0.35

4216.97 1.95 0.73 -0.00 -1.27 1.04 -0.31 0.25 0.40

4466.84 2.13 0.83 0.00 -1.42 1.16 -0.27 0.28 0.45

4731.51 2.31 0.95 0.00 -1.59 1.29 -0.23 0.31 0.49

5011.87 2.50 1.09 0.00 -1.77 1.44 -0.20 0.33 0.53

5308.84 2.69 1.24 0.00 -1.95 1.60 -0.18 0.35 0.55

5623.41 2.88 1.41 0.00 -2.14 1.77 -0.18 0.35 0.54

5956.62 3.07 1.60 0.00 -2.34 1.95 -0.20 0.33 0.50

6309.57 3.25 1.80 0.00 -2.53 2.14 -0.25 0.28 0.43

6683.44 3.43 2.03 0.00 -2.70 2.34 -0.33 0.20 0.31

7079.46 3.59 2.27 0.00 -2.86 2.54 -0.44 0.07 0.13

7498.94 3.73 2.52 0.00 -3.00 2.76 -0.55 -0.11 -0.10

7943.28 3.86 2.78 0.00 -3.12 2.97 -0.67 -0.34 -0.39

8413.95 3.95 3.05 0.00 -3.22 3.18 -0.77 -0.62 -0.72

8912.51 4.02 3.30 0.00 -3.32 3.38 -0.82 -0.96 -1.09

9440.61 4.05 3.53 0.00 -3.44 3.56 -0.83 -1.35 -1.49

10000.00 4.04 3.73 0.00 -3.60 3.73 -0.79 -1.79 -1.89

10592.54 3.99 3.87 0.00 -3.82 3.88 -0.68 -2.27 -2.27

11220.18 3.90 3.92 0.00 -4.10 4.01 -0.49 -2.75 -2.58

11885.02 3.78 3.86 0.00 -4.42 4.13 -0.19 -3.14 -2.76

12589.25 3.61 3.65 0.00 -4.68 4.23 0.24 -3.34 -2.71

13335.21 3.43 3.22 0.00 -4.74 4.36 0.78 -3.23 -2.41

14125.38 3.22 2.52 0.00 -4.42 4.54 1.35 -2.83 -1.91

14962.36 2.99 1.44 0.00 -3.70 4.82 1.86 -2.28 -1.36

15848.93 2.76 -0.16 0.00 -2.73 5.25 2.22 -1.75 -0.91

Frequency

FF:RI

2106/8

FF:FF

2106/8

FF:90

2106/8

RI:FF FF:RI

FF:FF

2116

FF:RI

2116

FF:90

2116

EPS2116 Reference Manual A-8

A.8 Acoustical Response

The following graphs present directional responses for the EPS2116, including any effects of the windscreen. Data is presented both in graphs with corrections and in graphs without corrections. Graphs displaying corrections correspond to responses when the EPS2116 is used with the Model 831 and the LxT versions and a Larson Davis 377B02 microphone. Graphs displaying data without corrections correspond to responses when using other equipment with the EPS2116.

The correction filter applied through the Model 831 or LxT versions is indicated in parentheses, e.g. (FF:FF

2116).

A.8.1 Reference Direction

0° is perpendicular to plane of microphone diagram, as shown below:

FIGURE A-3 EPS2116 Effects without Correction

The data in the following graph was taken by computing the difference between the random response of the microphone by itself and the random response of the same microphone in an EPS2116.

EPS2116 Reference Manual A-9

The data below shows the effects of the EPS2116 on a free-field measurement.

EPS2116 Reference Manual A-10

A.8.2 EPS2116 Responses with Free-Field (0°) Correction

The following graphs show EPS2116 responses when using a Model 831 or LxT sound level meter with the 0

° free field (FF:FF 2116) microphone correction.

EPS2116 Reference Manual A-11

EPS2116 Reference Manual A-12

EPS2116 Reference Manual A-13

EPS2116 Reference Manual A-14

EPS2116 Reference Manual A-15

A.8.3 EPS2116 Responses with Random Response (diffuse) Correction

The following graphs show EPS2116 responses when using a Model 831 or LxT sound level meter with the random response, or diffuse, (FF:RI 2116) microphone correction.