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Summary of Contents for Cirrus Research MK:440
- Page 1 MK:440 Environmental Noise Microphone Installation & User Guide MK:440 Environmental Noise Microphone Revision E This manual, the software to which it relates, the program code and drawings are all: © Copyright Cirrus Research plc 2020 Page 1 of 13...
- Page 2 The content of this manual, any illustrations, technical information and descriptions within this document were correct at the time of going to print. Cirrus Research plc reserves the right to make any changes necessary, without notice, in line with the policy of continuing product development and improvement.
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Page 3: Table Of Contents
Class 1 Zone 2 AEx/Ex ec llB T4 (-30°C≤Ta≤+60°C) Each MK:440 unit will have its own output levels. Please refer to the factory calibration setup information for details for your specific instrument. The MK:440 is supplied with the configuration preset to meet those ordered from the factory. -
Page 4: Product Description
The device conforms to: IEC 60079-0 and IEC 60079-15 and is suitable for outdoor installation with a rating of IP54. The MK:440 is supplied with a ½” NPT connection that conduit may be connected to or a 1/2” gland. Technical information... -
Page 5: Mk:440 Overview
MK:440 Environmental Noise Microphone MK:440 Overview Bird Spike Windshield Preamp Backplate Captive lid Screw MK:440 enclosure/lid ½” NPT gland Page 5 of 13... -
Page 6: Installation
Please check with our technical department if you need confirmation about the settings of your equipment or if you need any other technical guidance. Installation Once you have received shipment of your new MK:440 Noise Sensor unit, follow the next stages to setup and install the equipment. Page 6 of 13... -
Page 7: Inspection
MK:440 Environmental Noise Microphone 6.1 Inspection Visually inspect the components of the MK:440 and ensure everything is in order. In the unlikely event that there is a problem with the unit contact your distributor in the first instance. 6.2 Location... -
Page 8: Installation And Wiring
MK:440 Environmental Noise Microphone 6.3 Installation and wiring The MK:440 must be wired in accordance with the National Electric code (NFPA 70) or the Canadian Electric Code (CSA C22.1). An installation drawing below shows the electrical connections to be made to the device, note that the power and loop signals can come from a combination of non- hazardous and hazardous locations as long as it is suitably rated. -
Page 9: Dc Voltage Output Option
Input Ground via a 100ohm resistor for a voltage across the resistor of 10mV/dB. 7.1 Earth bonding The MK:440 has several earth bonding points, it is essential the product is connected to a suitable ground connection. Earthing points are illustrated below: Note that the external and internal earths of the enclosure share an electrical connection, but the lid does not. -
Page 10: Maintenance & Calibration
It is recommended that the system is calibrated once a year to maintain the accuracy of the system, it requires removal of the lid of the MK:440 and must be carried out by a competent person in a suitable environment. -
Page 11: Available Ranges And Equations
MK:440 Environmental Noise Microphone Available Ranges and Equations The following ranges can be specified for factory delivery (64-134dB is the default setting if not specified): Nominal Example I _OUT (mA) DC Range SW1/1 SW1/2 SW1/3 Value at 9.4mA dB = (10 x I) + 20... - Page 12 MK:440 Environmental Noise Microphone Appendix 3 CE Declaration of Conformity Cirrus Research plc Hunmanby UK CE Certificate of Conformity Manufacturer: Cirrus Research plc Acoustic House, Bridlington Road Hunmanby, North Yorkshire, YO14 0PH United Kingdom Telephone +44 1723 891655 Equipment Description...
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Page 13: Cirrus Research Offices
MK:440 Environmental Noise Microphone 11 Cirrus Research Offices The addresses given below are the Cirrus Research plc offices. Cirrus Research plc also have approved distributors and agents is many countries worldwide. For details of your local representative, please contact Cirrus Research plc at the address below. Contact details for Cirrus Research authorised distributors and agents are also available from the Internet Web site at the address shown below.
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