Technical Manual for the Horn – DB3 Please note that every care has been taken to ensure the accuracy of our technical manual. We do not, however, accept responsibility for damage, loss or expense resulting from any error or omission. We reserve the right to make alterations in line with technical advances and industry standards.
1. INTRODUCTION These horn units have been designed for use in harsh environmental conditions. 2. INSTALLATION General When installing and operating explosion-protected electrical equipment, requirements for selection, installation and operation should be referred to eg. IEC 60079-14 worldwide and the ‘National Electrical Code’ in North America. Additional national and/or local requirements may apply. Ensure that all nuts, bolts and fixings are secure.
All cable glands should be of an equivalent NEMA/IP rating to that of the unit and integrated with the unit such that this rating is maintained. Once termination is complete, carefully push the cover back onto the unit, avoiding damage to the mating surfaces. Tighten the 6 off cover screws evenly, to ensure maintenance of the required gap between the cover and enclosure.
TONE FREQ/DESCRIPTION 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 06/01 Alt Tones 800/970 Hz at 1/4 sec Sweeping 800/970 Hz at 7Hz Sweeping 800/970 Hz at 1 Hz Continuous at 2850 Hz Sweeping 2400-2850 Hz at 7 Hz Sweeping 2400-2850 Hz at 1 Hz Slow Whoop Sweep 1200-500 Hz at 1 Hz Alt Tones 2400/2850 Hz at 2 Hz Int Tone of 970 Hz at 1 Hz Alt Tones 800/970 Hz at 7/8 Hz Int Tone at 2850 Hz at 1Hz 970Hz at 1/4 sec on 1 sec off Continuous at 970 Hz 554Hz for 100mS / 440 H
4. MAINTENANCE During the working life of the unit, little or no maintenance is required. However, if abnormal or unusual environmental conditions occur due to plant damage or accident etc., then visual inspection is recommended. If a fault should occur, it is recommended that the unit be returned to MEDC for repair. All parts are replaceable. If you have acquired a significant quantity of units, it is recommended that spares are also made available.
06/01 © MEDC 2001
© MEDC 2001 06/01
MEDC Ltd, Colliery Road, Pinxton, Nottingham NG16 6JF, UK. Tel: +44 (0)1773 864100 Fax: +44 (0)1773 582800 Sales Enq. Fax: +44 (0)1773 582830 Sales Orders Fax: +44 (0)1773 582832 E-mail: sales@medc.com Web: www.medc.com MEDC Stock No.
