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Summary of Contents for Norsonic Nor1212
- Page 1 Instruction Manual Outdoor Microphone Kit Nor1212...
- Page 3 Instruction Manual Outdoor Microphone Kit Nor1212...
- Page 4 Furthermore, Norsonic AS assumes no responsibility for any infringement of the intellectual property rights of third parties, wherever applicable, which could result from such use. Norsonic AS reserves the right to amend any of the information given in this manual in order to take account of new developments.
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Page 5: Table Of Contents
Norsonic Nor1212 User Guide Contents Introduction............................3 Technical description......................... 5 Assembling ............................7 Devices required................................7 Assembling the outdoor microphone unit ........................7 Mounting on a mast ..............................8 Grounding and lightening protection...........................9 Microphone Calibration ........................11 Maintenance ............................13 Specifications ........................... 15 Mounting direction ..............................15... -
Page 7: Introduction
Norsonic Nor1212 User Guide 1 Introduction The Outdoor microphone kit Nor1212 allows the standard measurement microphone Nor1225 with preamplifier Nor1201 or Nor1206 to be used as an all-weather microphone for semi-permanent applications. The Outdoor Kit protects the microphone from rain and snow, dust and insects. - Page 8 Introduction For improved protection in excessive humid applications, the outdoor kit may be combined with a microphone desiccator or the preamplifier may be heated.
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Page 9: Technical Description
Norsonic Nor1212 User Guide 2 Technical description The Outdoor Kit, Nor1212, is designed to operate in combination with Norsonic microphone Nor1225 and the preamplifier Nor1201 or Nor1206. Some other types of free-field microphones such as the Nor1223, Nor1226 and 1227 may... - Page 10 The base of the main body is sealed by means of the base screw. This base screw also contains a threaded hole for mounting the microphone system on a mast. Figure 2.2 Microphone system Nor1212...
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Page 11: Assembling
Nor1225 and preamplifier Nor1201. In addition to the outdoor kit Nor1212 you need the microphone, the preamplifier and a cable for connection to the measuring instrument. For Norsonic sound level meters, we recommend cable type Nor1408, which comes in standard lengths of 5, 10, 15, 20, 30 and 50 metres –... -
Page 12: Mounting On A Mast
The outdoor microphone assembly may easily be mounted on a supporting mast that has a mounting stud suitable for connection to the Nor1212. The dimensions are given in the section dealing with the specification and are those commonly used on tripods for cameras. -
Page 13: Grounding And Lightening Protection
If the mast is high and you need to make regular calibrations or other service operations, we recommend the use a tiltable or a telescopic mast. Norsonic can supply different masts on demand. Fasten the microphone cable along the mast properly. A cable flapping onto the mast in windy conditions may create excessive noise and ruin the measurement accuracy. -
Page 15: Microphone Calibration
Norsonic Nor1212 User Guide 4 Microphone Calibration The outdoor microphone system can be calibrated with a normal sound calibrator without the need for special couplers. We recommend using Nor1251 (1000 Hz) or Nor1253 (250 Hz). The procedure is valid for the microphones Nor1223, Nor1225, Nor1226 and Nor1227. -
Page 17: Maintenance
Figure 5.1 Desiccator number Norsonic 0896000. The mesh comes with an adhesive. When you TA202 mount a new mesh, ensure that the splice is placed midway between the acoustic ports! See figure 2.1. -
Page 19: Specifications
The modification of the free-field response and the random incidence- response of a Nor1225 microphone when placed in the outdoor kit Nor1212 is shown on the diagram below together with the requirements for a Class 1 sound level meter according to IEC61672-1. Both the free field and the random incidence-response shown are referred to the free- field response for Nor1225 microphone without the protection kit. -
Page 20: Directional Response
Specifications Correction to microphone free-field response Frequency [Hz] Free-field response Random-incidence response Tolerance limits with uncertainty. IEC 61672-1 Class 1 6.2.2 Directional response The directional response satisfies the requirements for a Class 1 sound level meter according to IEC61672-1. The figures on the next pages show the directional response in detail in a plane through the horizontal and vertical axis of symmetry. - Page 21 Norsonic Nor1212 Norsonic Nor1212 User Guide User Guide +7 dB -5 dB -5 dB 90 o 90 o 270 o 270 o 1 k, 2k, ...16kHz 1 k, 2k, ...16kHz -5 dB -5 dB Directional response Directional response +7 dB...
- Page 22 Specifications Specifications Reference Reference direction direction +7 dB 6,3 kHz 6,3 kHz 4 kHz 4 kHz -5 dB -5 dB 6,3 kHz 6,3 kHz 90 o 90 o 270 o 270 o 2 kHz 2 kHz 1 kHz 1 kHz -5 dB -5 dB Directional response...
- Page 23 Norsonic Nor1212 Norsonic Nor1212 User Guide User Guide Reference Reference direction direction +7 dB 16 kHz 16 kHz 12,5 kHz 12,5 kHz 10 kHz 10 kHz 8 kHz 8 kHz -5 dB -5 dB 90 o 90 o 270 o...
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Page 24: General
EN-50081-1 EN-50082-1 Accessories and spare parts Desiccator: TA202 Windshield: Nor4520. Dust-mesh: Norsonic part no 0896000. Microphone: Nor1225 Microphone preamplifier: Nor1201, Nor1206 or Nor1207 Sound calibrator: Nor1251 or Nor1253 Microphone cable: Nor1408 Standard lengths 5, 10, 15, 20, 30 and 50 metres – other lengths on request. - Page 26 P.O.Box 24 N-3421 Lierskogen Norway www.norsonic.com...
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