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Calibration
The ER-200 dosimeter is factory calibrated. Flexibility in the dosimeter design
allows exchange rates of 3, 4 or 5 dB, criterion levels from 75 to 90 dB and
threshold levels from 75 to 85 dB; ho wever, these settings are only configurable
at the factory and are not adjustable by the user without PC interface software and
other specialized equipment.
Specifications
The default settings used by the ER-200 for calcula tion of noise dose are consistent
with ANSI S1.25–1991 (R2002) Specification for Personal Noise Dosimeters.
Calibration Accuracy:
+–
2 dB
Dose Calculation Criteria:
Exchange Rate: 3 dB
Criterion Level: 85 dB
Threshold Level: 75 dB
Criterion Time: 8 hours
Frequency Weighting: A
Response: Slow
Temperature Range of Operation:
-10°C to 45°C (14°F to 113°F)
Omni-directional Microphone:
Flat from 100 Hz to 15 kHz
Earphone Monitor Jack (2.5 mm):
10 mV (-40 dB re 1V)
corresponds to 94 dB SPL
+–
1 dB at 1 kHz
Frequency Weighting For Earphone Monitoring:
Same as microphone (A)
Power Supply:
Three AAAA batteries
RMS Detector:
Dynamic range 60 dB (70 to 130 dB)
Battery Life:
> 250 hours continuous use
Care and Maintenance
• Do not expose to extreme tempera tures.
• Do not immerse in any liquids.
• Clean with a soft dry cloth.
Warranty
Etymotic Research, Inc. warrants this product against defects in material or
workmanship for a period of one year from the da te of original purchase.
Etymotic will repair or replace the defective product a t its option if returned
within the warranty period to our ser vice facility. This warranty is in lieu of all
other warranties, expressed or implied, including, but not limited to, any implied
warranty of merchantability or fitness for a particular purpose.
FCC & Industry Canada Statements
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions: (1) this device may not cause harmful interference, and
(2) this device must accept an y interference received, including interference that
may cause undesired operation.
This class B digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe B est conforme à la norme NMB-003
du Canada.
Risk Factors For Hearing Loss
Health risks from excessive noise exposure inc lude permanent hearing loss and
tinnitus (ringing in the ears). Other factors such as genetics, exposure to smoke,
pesticides, chemical solvents and certain medications increase the risk of hearing
loss. Some of these factors make noise exposure more dama ging to hearing than
noise exposure alone. The dosimeter predicts average risk, not individual risk.