User manual HANNA INSTRUMENTS HI 504902

[. . . ] TECHNICAL DATA · Telecom certifications Argentina, Australia, Austria, Belgium, Brazil, Canada, Chile, China, Cyprus, Czech Republic, Denmark, Finland, France, Germany, Greece, Hong Kong, Hungary, Iceland, India, Indonesia, Ireland, Israel, Italy, Japan, Korea, Liechtenstein, Luxembourg, Malaysia, Mexico, Netherlands, New Zeland, Norway, Philippines, Poland, Portugal, Russia, Singapore, Slovak Republic, South Africa, Spain, Sweden, Switzerland, Taiwan, Turkey, United Kingdom, United States Instruction Manual HI 504902 RS485 Modem · Data service · Remote control by AT commands · Input voltage 12 VDC · Dimensions 165 x 110 x 35 mm (6. 5 x 4. 3 x 1. 4'') · Weight approx. 250 g (0. 55 lb. ) MAINTENANCE & SAFETY TIPS · Do not expose the unit to any extreme environment where temperature or humidity is high. [. . . ] If service is required, contact the dealer from whom you purchased the instrument. If under warranty, report the model number, date of purchase, serial number and the nature of the failure. If the repair is not covered by the warranty, you will be notified of the charges incurred. If the instrument is to be returned to Hanna Instruments, first obtain a Returned Goods Authorization number from the Customer Service department and then send it with shipping costs prepaid. When shipping any instrument, make sure it is properly packaged for complete protection. IST504902 07/04 www. hannainst. com Dear Customer, Thank you for choosing a Hanna Instruments product. This manual will provide you with the necessary information for correct operation. Please read it carefully before using the instrument. If you need additional technical information, do not hesitate to e-mail us at directives. This instrument is in compliance with the FUNCTIONAL DESCRIPTION PRELIMINARY EXAMINATION Remove the instrument from the packing material and examine it carefully to make sure that no damage has occurred during shipping. If there is any damage, notify your Dealer. Note: Save all packing material until you are sure that the instrument functions correctly. All defective items must be returned in their original packaging together with the supplied accessories. OPERATIONAL GUIDE · Connect the RS485 interface cable to A and B terminals. [. . . ] · Power the unit through the 12 VDC adapter. · The unit is also provided with two LED indicators for signaling the operating status: a blinking "RD" green LED is related to data receiving, while the "TD" yellow LED flashes during data transmission. Inside view Note: The modem should be installed only by qualified personnel. [. . . ]