Astro 7660 User Manual [en, es, fr]

7660

ELECTRONIC SAFETY EARMUFFS

www.astrotools.com

1 YEAR LIMITED WARRANTY

• Astro Pneumatic Tool Co. warrants our products to the original user against
defective material or workmanship for a period of 1 year (except where noted on our
price schedule) from the date of 1st use. Astro reserves the right to determine
whether the product failed because of defective material, workmanship or other
causes and to charge back for missing parts. Astro Pneumatic Tool Co., at its
discretion, will repair products covered under this warranty free of charge. The
distributor should direct the original user to return the product (with the exceptions
listed below) with the distributor’s name, address, adequate proof of date of
purchase or a copy of warranty card, and a short note explaining the problem.

Failures caused by accident, alteration, or misuse are not covered by this
warranty.

• Astro Pneumatic Tool Co. or its authorized service representatives must perform all
warranty repairs. Any repair to the product by unauthorized service representatives
voids this warranty. The rights under this warranty are limited to the original user and
may not be transferred to subsequent owners.

• This warranty is in lieu of all other warranties, expressed or implied, including
warranties of merchantability and fitness for a particular purpose. Some states do
not allow the exclusion of limitations of incidental or consequential damages so the
above limitations may not apply to you.

PLEASE DO NOT RETURN ANY PRODUCT WITHOUT CALLING

1-800-221-9705 FOR INSTRUCTIONS

Unpacking

When unpacking, check the parts diagram and part number
listing on page 4 to make sure all parts are included. If any
parts are missing or damaged, please call your distributor.

PRODUCT INFORMATION:

• LED power indicator

• On/Off switch with volume control

• Solid-state circuit

• Built-in microphone amplifies low level sound

• Eliminates noise over 85db

• Comfortable ear cushions and headband

• US Patent 7,245,735 B2

• Powered by 2 AA batteries
(batteries not included)

WARNING

Discontinue use of earmuffs immediately if a
malfunction or improper operation occurs, or
may result in serious injury or loss of hearing.

IMPORTANT

ELECTRONIC SAFETY EARMUFFS

MADE IN CHINA

Page 1

7660

ELECTRONIC SAFETY EARMUFFS

Laboratory Test Report

ANSI S3.19-1974 Testing-Model IS1200 Earmuffs

1.0 Test Articles - Ten Model IS1200 Earmuffs Hearing Protectors.

2.0 Applicable Specifications - ANSI S3.19-1974 (R1990).

3.0 Test Results - The results of the hearing protector acoustical test and the Noise Reduction Rating (NRR)
calculations are presented in Table 3.1 and show that the NRR rating is 21. The measured data for each
cup of each earmuff is listed in Table 3.2. The average headband force, with an earpiece separation distance
of 14.40cm was 10.00 ± 0.1 Newtons or 2.3lbs.

In accordance with 40CFR PART 211- Product Noise Labeling, “Spectral uncertainty. Possible variation in
exposure to the noise spectra in the workplace. ( To avoid the under protection that would result from these
variations relative to the assumed: “Pink Noise” used to determine the NRR, an extra three decibel reduction
is included when computing the NRR)” The NRR rating is accordance with 40CFR211 the NRR rating of the
Model IS1200 Earmuffs is given in Table3.1.

TABLE 3.1: IS1200 Earmuff NRR Calculation worksheet

Measured 1/3-octave Data Exterior to Earmuff

1/3 Octave

Center Band

Frequency

125
160
200
250
315
400
500
630

800
1000
1250
1600
2000
2500
3150
4000
5000
6300
8000

Sound Levels

Exterior to

Earmuff

59.9

63.9

61.1

58.7

58.2

57.9

60.0

61.5

61.4

61.9

64.7

63.4

60.9

59.1

60.1

59.7

60.0

58.7

57.6

Average

Earmuff

Attenuation

4.0

5.1

7.5

10.9

11.9

14.7

25.3

28.4

28.3

33.5

35.2

32.9

33.0

29.0

30.4

33.3

34.7

34.3

33.4

Standard

Deviation of

Attenuation

Overall C Weighted Level
Overall A Weighted Level
Earmuff NRR value
OSHA Adjusted NRR

1.4

2.3

2.6

2.4

2.2

2.1

2.0

2.1

2.3

2.4

1.8

2.0

1.2

2.8

1.6

1.4

0.8

0.4

0.8

C-weighted

Sound Levels

59.7

63.8

61.1

58.7

58.2

57.9

60.0

61.5

61.4

61.9

64.7

63.3

60.7

58.8

59.6

58.9

58.7

56.7

54.6
=

=
=
=

A-weighted

Sound levels

43.8

50.5

50.2

50.1

51.6

53.1

56.8

59.6

60.6

61.9

65.3

64.4

62.1

60.4

61.3

60.7

60.5

58.6

56.5

73.5

52.2
21
18

A-Weighted

Sound Levels

in Earmuff

41.2

47.7

45.3

41.6

41.9

40.5

33.5

33.3

34.6

30.8

31.9

33.5

30.3

34.2

32.5

28.8

26.6

24.7

23.9

Page 2 Page 3

7660

Table 3.2 IS 1200 Measured Noise Levels Inside Earmuff

ELECTRONIC SAFETY EARMUFFS

The 7760 Electronic Earmuffs provides excellent protection in work areas where decibel levels exceed that which is safe.
This hearing protection device complies with the requirements of the European Directive 89/686/CEE annex II by means of the
European Standard EN352-1: 1993 Hearing protector - Safety requirements and testing - Part 1: Earmuff:

USAGE INSTRUCTIONS:

1) For proper fit, extend headband to maximum “open” position and place the cups over the ears,
allowing the headband to span across head.

2) Settle the headband rests on top of the head.

3) The ear cushion should be a snug fit against the head.

4) Adjust to the correct pressure on the head to ensure an effective noise seal.
It is recommended that the user applies earmuffs before exposure and wear them for the duration of time in areas with

unsafe decibel levels.

NOTE: This earmuff is of “normal size range” complying with EN 352-1. It will fit a wide range of users

CLEANING:

Use warm soapy water only.
It is recommended to disinfect the earmuff every 3 months, according to use.

STORAGE:

When earmuff is not being used it is recommended to store in a clean and dry polybag.

BATTERY REPLACEMENT

Use a flat sturdy tool to pry
ear cushion from earmuff molding.

Un-attach ear pad and sponge
cushion backpad.

Replace batteries and
re-attach ear pad and sponge
cushion backpad.