Casella CEL-120/2 현장 매뉴얼 - 페이지 2

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Specification

Type:

• CEL-120/1: Calibrator to EN (IEC) 60942: 2003 Class 1

• CEL-120/2: Calibrator to EN (IEC) 60942: 2003 Class 2

Both calibrators meet ANSI S1.40 - 2006

• Calibration reference condition: 23 °C, 101.3 kPa and 50 %RH.

Reference Microphone:

• B & K 4133, Nominal load volume: 190 mm²

Calibration level: (at reference conditions)

• CEL-120/1: 114.0 dB ±0.25 dB and 94.0 dB ±0.25 dB,

• CEL-120/2: 114.0 dB ±0.35 dB.

• Calibration frequency: 1 kHz ±5 Hz.

• Stabilising time:

5 s

• Sensitivity to load volume change: 0.0002 dB/mm²

Short term level stability:

• ＜ ± 0.1 dB for CEL-120/1

• ＜ ± 0.2 dB for CEL-120/2

• Total harmonic distortion: Less than 1%.

Tolerance limits for the CEL-120/1 (Class 1) over full environmental conditions:

• Static pressure range: 650 to 1080 mBar

• Air temperature range: –10 to +50 °C

• Relative humidity range: 25 to 90 % RH

• Pressure coefficient: <0.004 dB/kPa

• Better than <±0.4 dB deviation over environmental ranges

Tolerance limits for the CEL-120/2 (Class 2) over full environmental conditions:

• Static pressure range: 650 to 1080 mBar

• Air temperature range: –10 to +50 °C

• Relative humidity range: 25 to 90 % RH

• Pressure coefficient: <0.004 dB/kPa

•

Better than <±0.6 dB deviation over the environmental range

Storage temperature range: –20 to +60 °C.

Battery: 2 × 1.5 V, AAA (LR03).

An alkaline battery is recommended and typically provides 2 minutes of operation per

day for almost 2 years.

Dimensions: 75.5 mm × 54.0 mm × 37.0 mm (2.9 × 2.1 × 1.4 in).

Weight (including batteries): 85 g (0.19 lb).

Manufacturers Servicing and Warranty Arrangements

In order to ensure its rigid conformity with the requirements of the specification, this

instrument is thoroughly inspected and calibrated prior to dispatch from the factory.

All technical information for an individual instrument is filed under the instrument

serial number. Therefore, the instrument serial number should be quoted in any

correspondence concerning the instrument.

The manufacturers undertake to rectify any defect in the instrument that is directly

attributable to faulty design or assembly, and which becomes apparent during the

warranty period. In order to take advantage of this warranty, the instrument must be

returned, carriage paid, to the manufacturer's factory or accredited agent, where

necessary repairs will be carried out.

Normally, the warranty period runs for 24 months from the date of receipt of goods,

with exceptions on certain specialised components supplied by other manufacturers

which are warranted for shorter periods. Some of the specialised components used in

this instrument may be subject to longer guarantees by their actual manufacturers

and in all such cases the benefits of these undertakings will be passed on to the user.

However, Casella CEL's liability is limited to items of their own manufacture, and they

do not accept liability for any loss resulting from the operation or interpretation of the

results from this equipment.

A comprehensive Instrument Calibration Maintenance Agreement (ICMA) scheme is

available to extend the initial warranty period of this instrument. At the end of the first

warranty period, it is recommended that the equipment be returned to the Service and

Re-calibration Department at Bedford, where it will be inspected and entered into the

ICMA scheme as required. The warranty will then be extended for the period stated

on the individual schedule. Please contact your local Casella CEL agent for full details

of this service.

In the event of a malfunction developing during the warranty period, the instrument

should be carefully packed and returned either to Casella CEL's local agent, or in the

case of domestic sales, to the Service Department at Bedford.

Please include the following information:

• Instrument type(s) and serial number(s)

• Customer name and address

• Contact name and phone number

• Reason for returning the equipment, with a detailed description of the fault

The necessary adjustments or repairs will be carried out, and the instrument returned

as soon as possible. After the warranty has expired (except on approved accounts)

service work is undertaken against quotations, and all packing and transit costs are

charged extra.

Introduction

The CEL-120/1 and CEL-120/2 Acoustic Calibrators provide an accurate and easily

used means of calibrating sound level meters, both in the laboratory and in the field.

CASELLA MEASUREMENT

Regent House, Wolseley Road, Kempston, Bedford, MK42 7JY, U.K.

Phone: +44 (0) 1234 844 100

In addition, both instruments meet the requirements of ANSI S1.40 - 2006.

Fax: +44 (0) 1234 841 490

E-mail for technical support: [email protected]

These calibrators are intended for use with industry standard WS2 (half-inch)

For online Technical Support: http://helpdesk.casellameasurement.com

microphones, and may also be used to calibrate WS3 (quarter-inch) microphones by

means of the CEL-4726 Coupler.

Document number FG43-02

Field Guide

CEL-120/1 and CEL-120/2

Acoustic Calibrators

1. On/Off button

4. Upper blue LED (114 dB level)

2. Green LED power status

5. Level toggle button

3. Microphone cavity

6. Lower blue LED (94 dB level)

• The CEL-120/1 satisfies the requirements of EN (IEC) 60942:2003 Class 1 at

user-selected calibration levels of 94.0 dB and 114.0 dB.

• The CEL-120/2 satisfies the Class 2 standard at 114.0 dB.

Think Environment. Think Casella.