National Instruments UMI-7774 User Manual And Specifications

Also see for UMI-7772: User manual USER GUIDE AND SPECIFICATIONS

National Instruments UMI-7774 User Manual And Specifications Manual pdf 6 page image

© National Instruments Corporation 5 NI UMI-7774/72 User Guide and Specificationsstandard impulse withstand voltage levels that commonly occur in electrical distribution systems. Thefollowing is a description of installation categories:• Installation Category I is for measurements performed on circuits not directly connected to theelectrical distribution system referred to as MAINS 1 voltage. This category is for measurements ofvoltages from specially protected secondary circuits. Such voltage measurements include signallevels, special equipment, limited-energy parts of equipment, circuits powered by regulatedlow-voltage sources, and electronics.• Installation Category II is for measurements performed on circuits directly connected to theelectrical distribution system. This category refers to local-level electrical distribution, such as thatprovided by a standard wall outlet (for example, 115 AC voltage for U.S. or230 AC voltage for Europe). Examples of Installation Category II are measurements performed onhousehold appliances, portable tools, and similar modules.• Installation Category III is for measurements performed in the building installation at thedistribution level. This category refers to measurements on hard-wired equipment such asequipment in fixed installations, distribution boards, and circuit breakers. Other examples arewiring (including cables), bus bars, junction boxes, switches, socket outlets in the fixed installation,and stationary motors with permanent connections to fixed installations.Installation Category IV is for measurements performed at the primary electrical supply installation(<1,000 V). Examples include electricity meters and measurements on primary overcurrent protectiondevices and on ripple control units.Electromagnetic Compatibility InformationThis hardware has been tested and found to comply with the applicable regulatory requirements andlimits for electromagnetic compatibility (EMC) as indicated in the hardware’s Declaration ofConformity (DoC) 2. These requirements and limits are designed to provide reasonable protectionagainst harmful interference when the hardware is operated in the intended electromagneticenvironment. In special cases, for example when either highly sensitive or noisy hardware is being usedin close proximity, additional mitigation measures may have to be employed to minimize the potentialfor electromagnetic interference.While this hardware is compliant with the applicable regulatory EMC requirements, there is noguarantee that interference will not occur in a particular installation. To minimize the potential for thehardware to cause interference to radio and television reception or to experience unacceptableperformance degradation, install and use this hardware in strict accordance with the instructions in thehardware documentation and the DoC 2.If this hardware does cause interference with licensed radio communications services or other nearbyelectronics, which can be determined by turning the hardware off and on, you are encouraged to try tocorrect the interference by one or more of the following measures:• Reorient the antenna of the receiver (the device suffering interference).• Relocate the transmitter (the device generating interference) with respect to the receiver.• Plug the transmitter into a different outlet so that the transmitter and the receiver are on differentbranch circuits.1 MAINS is defined as a hazardous live electrical supply system that powers equipment. Suitably rated measuring circuits maybe connected to the MAINS for measuring purposes.2 The Declaration of Conformity (DoC) contains important EMC compliance information and instructions for the user orinstaller. To obtain the DoC for this product, visit ni.com/certification, search by model number or product line,and click the appropriate link in the Certification column.Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com