NI 9244 User Manual and Specifications
Contents
1. EMC Online Product Certification To obtain product certifications and the Declaration of Conformity DoC for this product visit ni com certification search by module number or product line and click the appropriate link in the Certification column 44 nicom NI 9244 User Manual and Specifications Shock and Vibration To meet these specifications you must panel mount the system If you are using the NI 9244 with screw terminal you also must either affix ferrules to the ends of the terminal wires Operating vibration Random IEC 60068 2 64 5 gms 10 Hz to 500 Hz Sinusoidal IEC 60068 2 6 5 g 10 Hz to 500 Hz Operating shock IEC 60068 2 27 30 g 11 ms half sine 50 g 3 ms half sine 18 shocks at 6 orientations Environmental Refer to the manual for the chassis you are using for more information about meeting these specifications Operating temperature IEC 60068 2 1 IEC 60068 2 2 40 C to 70 C Storage temperature IEC 60068 2 1 IEC 60068 2 2 40 C to 85 C Ingress protecton IP 40 NI 9244 User Manual and Specifications National Instruments 45 Operating humidity 60068 2 56 10 to 90 RH noncondensing Storage humidity IEC 60068 2 56 5 to 95 RH noncondensing Pollution Degree s s seeseeeeeeerseeeeees 2 Maximum altitude 5 0002. Refer to the Specifications section for more information about the data rate range When using the internal master timebase of 12 8 MHz the result is data rates of 50 kS s 25 kS s 16 667 kS s and so on down to 1 613 kS s depending on the value of n When using an external timebase with a frequency other than 12 8 MHz the NI 9244 has a different set of data rates Note The NI 9151 R Series Expansion chassis does not support sharing timebases between modules NI 9244 User Manual and Specifications National Instruments 31 Sleep Mode This module supports a low power sleep mode Support for sleep mode at the system level depends on the chassis that the module is plugged into Refer to the chassis manual for information about support for sleep mode If the chassis supports sleep mode refer to the software help for information about enabling sleep mode Typically when a system is in sleep mode you cannot communicate with the modules In sleep mode the system consumes minimal power and may dissipate less heat than it does in normal mode Related Information Power Requirements 32 nicom NI 9244 User Manual and Specifications Specifications The following specifications are typical for the range 40 C to 70 C unless otherwise noted Input Characteristics Scaling 118 911 nV LSB Number of channels ssssseeeseeeee seee 4 analog input channels ADC reso
3. 9244 User Manual and Specifications National Instruments 19 Connecting Three Phase Measurement Configurations You can connect WYE or delta measurement configurations to the NI 9244 Figure 7 Connecting a 4 Wire WYE Measurement Configuration Phase A Phase B Phase C Neutral 20 nicom NI 9244 User Manual and Specifications Figure 8 Connecting a High Leg Delta Measurement Configuration Phase A Phase B All Phase C Al2 Neutral Neutral SE ees cee Seo eee ty erue NI 9244 User Manual and Specifications National Instruments 21 Figure 9 Connecting a 3 Wire Delta Measurement Configuration Phase A AIO Phase B Phase C 22 nicom NI 9244 User Manual and Specifications Figure 10 Connecting a Corner Grounded 2 Wire Delta Measurement Configuration Phase A Phase B Phase C Note The 9244 can not measure the entire tolerance range or high crest factor signals on 690 Vms systems in this configuration Refer to the Specifications section for more information about the input range NI 9244 User Manual and Specifications National Instruments 23 Connecting Single Phase Measurement Configurations You can connect 3 wire or 2 wire single phase measurement configurations to the NI 9244 Figure 11 Connecting a 3 Wire Measurement Configuration Split Phase 24 nicom NI9244 User Manual and Specifications Figur
4. delay ecce 40 312 f 1 7 us Passband Frequency i ese eee isa 0 453 f Flatness 0 kHz to 20 kHz 100 mdB max 0 kHz to 10 2 20 mdB max Negative phase sequence error at 50 Hz and 60 Hz At 5 unbalance Maximum 0 1396 Typical 0 05 At 1 unbalance Maximum 0 13 Typical esses 0 05 Zero phase sequence error at 50 Hz and 60 Hz At 5 unbalance Maximum 0 13 0 05 Typical NI 9244 User Manual and Specifications National Instruments 37 At 1 unbalance E 0 13 KEE 0 05 Stopband Frequency deed ere 0 547 f Rejection 95 dB Alias free bandwidth 0 453 f Anti alias rejection f5 50 kS s 50 dB 3 dB bandwidth f 50 kS s 0 49 f Crosstalk 60 2 100 dB Crosstalk 1 2 74 dB CMRR f 60 Hz 78 dB SFDR 1 kHz 60 dBFS 120 dB Total Harmonic Distortion THD LK eL ee 98 dB OO kKEIz toe ene 100 dB MTBE i dU Contact NI for Bellcore MTBF or MIL HDBK 217F specifications 38 nicom NI 9244 User Manual and Specifications Power Requirements Power consumption from chassis Active mode 332 mW max Sleep mode 50 uW max Thermal dissipation Active mode sss 652 mW max Sleep mode 320 uW Physical
5. using 12 AWG to 14 AWG wires NI 9244 User Manual and Specifications National Instruments 11 Figure 3 12 AWG to 14 AWG Installation 1 Route wires over the strain relief piece 2 Secure strain relief piece and NI 9969 backshell in place using captive Screws 12 nicom NI9244 User Manual and Specifications Installing the NI 9969 Using16 AWG Wire Complete the following steps to install the NI 9969 using 16 AWG wires NI 9244 User Manual and Specifications National Instruments 13 Figure 4 16 AWG Installation 1 Route wires through the strain relief pieces 2 Secure strain relief piece and NI 9969 backshell in place using captive Screws 14 nicom NI9244 User Manual and Specifications Installing the NI 9969 Using18 AWG to 24 AWG Wire Complete the following steps to install the NI 9969 using 18 AWG to 24 AWG wires NI 9244 User Manual and Specifications National Instruments 15 Figure 5 18 AWG to 24 AWG Installation 1 Route wires over the strain relief piece 2 Secure strain relief piece and NI 9969 backshell in place using captive Screws 16 nicom NI9244 User Manual and Specifications Signals The NI 9244 has three AI terminals and a Neutral terminal You can connect three phase and single phase measurement configurations to the NI 9244 The NI 9244 supports standard service levels up to 400 Line to Neutral L N and 690 V L
6. 244 at ni com calibration Calibration 1 year NI 9244 User Manual and Specifications National Instruments 47 Worldwide Support and Services The National Instruments website is your complete resource for technical support At ni com support you have access to everything from troubleshooting and application development self help resources to email and phone assistance from NI Application Engineers Visit ni com services for NI Factory Installation Services repairs extended warranty and other services Visit ni com register to register your National Instruments product Product registration facilitates technical support and ensures that you receive important information updates from NI A Declaration of Conformity DoC is our claim of compliance with the Council of the European Communities using the manufacturer s declaration of conformity This system affords the user protection for electromagnetic compatibility EMC and product safety You can obtain the DoC for your product by visiting ni com certification If your product supports calibration you can obtain the calibration certificate for your product at ni com calibration 48 nicom NI 9244 User Manual and Specifications National Instruments corporate headquarters is located at 11500 North Mopac Expressway Austin Texas 78759 3504 National Instruments also has offices located around the world For telephone suppor
7. Characteristics If you need to clean the module wipe it with a dry towel Note For two dimensional drawings and three dimensional models of the C Series module and connectors visit ni com dimensions and search by module number Screw terminal wiring 0 511 mm diameter 24 AWG to 2 053 mm diameter 12 AWG copper conductor wire with 7 mm 0 28 in of insulation stripped from the end NI 9244 User Manual and Specifications National Instruments 39 Torque for screw terminals 0 5N mto0 6N m 4 42 Ib in to 5 30 lb in Berrules e 0 25 mm to 2 5 mm KEE 150 g 5 3 oz Safety Connect only voltages that are within the following limits Maximum working voltage channel to earth ground Up to 2 000 m altitude Continuous esessses 400 Vms 2 001 to 5 000 m altitude Continuous 400 Vms Measurement Category II or 300 Vms Measurement Category III Division 2 and Zone 2 hazardous locations applications Channel to earth ground 300 Vins Measurement Category III 40 nicom NI 9244 User Manual and Specifications Measurement Category III is for measurements performed in the building installation at the distribution level This category refers to measurements on hard wired hardware such as hardware in fixed installations distribution boards and circuit breakers Other examples are wiring including cables bus bar
8. I 9244 User Manual and Specifications Electromagnetic Compatibility This product meets the requirements of the following EMC standards for electrical equipment for measurement control and laboratory use s EN 61326 1 IEC 61326 1 Class A emissions Industrial immunity s EN 55011 CISPR 11 Group 1 Class A emissions EN 55022 CISPR 22 Class A emissions EN 55024 CISPR 24 Immunity e AS NZS CISPR 11 Group 1 Class A emissions e AS NZS CISPR 22 Class A emissions e FCC 47 CFR Part 15B Class A emissions ICES 001 Class A emissions Ka Note In the United States per FCC 47 CFR Class A equipment is intended for use in commercial light industrial and heavy industrial locations In Europe Canada Australia and New Zealand per CISPR 11 Class A equipment is intended for use only in heavy industrial locations NI 9244 User Manual and Specifications National Instruments 43 Note Group equipment per CISPR 11 is any Ka industrial scientific or medical equipment that does not intentionally generates radio frequency energy for the treatment of material or inspection analysis purposes Ka Note For EMC declarations and certifications refer to the Online Product Certification section CE Compliance C This product meets the essential requirements of applicable European Directives as follows e 2006 95 EC Low Voltage Directive safety e 2004 108 EC Electromagnetic Compatibility Directive
9. IIC T4 and Ex nA IIC T4 hazardous locations and nonhazardous locations only Follow these guidelines if you are installing the NI 9244 ina potentially explosive environment Not following these guidelines may result in serious injury or death A Caution Do not disconnect I O side wires or connectors unless power has been switched off or the area is known to be nonhazardous Caution Do not remove modules unless power has been switched off or the area is known to be nonhazardous Caution Substitution of components may impair suitability for Class I Division 2 Caution For Division 2 and Zone 2 applications install the system in an enclosure rated to at least IP 54 as defined by IEC EN 60529 pp 6 nicom NI9244 User Manual and Specifications Special Conditions for Hazardous Locations Use in Europe This equipment has been evaluated as Ex nA IIC T4 Gc equipment under DEMKO 12 ATEX 1202658X Each module is marked 3G and is suitable for use in Zone 2 hazardous locations in ambient temperatures of 40 C lt Ta lt 70 C If you are using the NI 9244 in Gas Group IIC hazardous locations you must use the device in an NI chassis that has been evaluated as Ex nC 4 EEx nC T4 Ex nA T4 or Ex nL T4 equipment A Caution The system shall be mounted in an ATEX certified enclosure with a minimum ingress protection rating of at least IP54 as defined in IEC EN 60529 and used in an environment of not more
10. Lloyd s Register certification for a product visit com certification and search for the LR certificate or look for the Lloyd s Register mark on the product label A Caution In order to meet the EMC requirements for marine applications install the product in a shielded enclosure with shielded and or filtered power and input output ports In addition take precautions when designing selecting and installing measurement probes and cables to ensure that the desired EMC performance is attained NI 9244 User Manual and Specifications National Instruments 9 Connecting the NI 9244 The NI 9244 provides connections for four analog input channels Figure 2 NI 9244 Pinout Alo 0 j AH 1 Al2 2 Neutral 3 10 nicom NI 9244 User Manual and Specifications Connector The NI 9244 has a 4 terminal detachable screw terminal connector Backshell Caution For safe operation with hazardous voltages you must use the NI 9969 Connector Backshell as shown in Figure 1 with the 4 terminal connector on the NI 9244 You can use the backshell with 12 AWG to 24 AWG wires with the NI 9969 12 AWG to 14 AWG 16 AWG and 18 AWG to 24 AWG require different strain relief pieces Installing the NI 9969 Using12 AWG to14 AWG Wire Complete the following steps to install the NI 9969
11. USER MANUAL AND SPECIFICATIONS NI 9244 4 Channel 400 Vms L N 800 Vms L L 24 Bit Simultaneous Analog Input Module Fran ais Deutsch HAR SSO ni com manuals c NATIONAL INSTRUMENTS WwW This document describes how to use the National Instruments 9244 and includes specifications and pin assignments for the NI 9244 Note The safety guidelines and specifications in this document are specific to the NI 9244 The other components in the system might not meet the same safety ratings and specifications Refer to the documentation for each component in the system to determine the safety ratings and specifications for the entire system Related Information Chassis Compatibility ni com info compatibility NI CompactRIO Documentation NI CompactDAO amp ni com info c cseriesdoc e Services ni com services Ce e Software Support Ceo 9 ni com info softwareversion 2 2 nicom 9244 User Manual and Specifications Safety Guidelines Operate the NI 9244 only as described in this user manual N Hot Surface This icon denotes that the component may be hot Touching this component may result in bodily injury AN Warning This icon denotes a warning advising you to take precautions to avoid electrical shock A Caution Do not operate the NI 9244 in a manner not specified in this user manual Product misuse can result in a hazard You can comprom
12. a rate The stopband rejection is the minimum amount ofattenuation applied by the filter to all signals with frequencies within the stopband NI 9244 User Manual and Specifications National Instruments 29 Alias Free Bandwidth Any signal that appears in the alias free bandwidth of the NI 9244 is not an aliased artifact of signals at a higher frequency The alias free bandwidth is defined by the ability of the filter to reject frequencies above the stopband frequency and it is equal to the data rate minus the stopband frequency Understanding NI 9244 Data Rates The frequency ofa master timebase fy controls the data rate f of the NI 9244 The NI 9244 includes an internal master timebase with a frequency of 12 8 MHz but the module also can accept an external master timebase or export its own master timebase To synchronize the data rate of an NI 9244 with other modules that use master timebases to control sampling all of the modules must share a single master timebase source Refer to the software help for information about configuring the master timebase source for the NI 9244 Visit com info and enter cseriesdoc for information about C Series documentation 30 nicom NI 9244 User Manual and Specifications The following equation provides the available data rates of the NI 9244 _ Bez 256 n s where n is any integer from 1 to 31 However the data rate must remain within the appropriate data rate range
13. e 12 Connecting a 2 Wire Measurement AIO mo A L 1 9244 Neutral Converting L N Measurements to L L To convert L N measurements to L L values calculate the voltage difference between the AI channels using your application software Refer to the following equation for an example of converting L N measurements to L L Phase A to Phase B Voltage AIO where AIO is the reading from Phase A is the reading from Phase B NI 9244 User Manual and Specifications National Instruments 25 Converting L N Measurements to L Earth To convert L N measurements to L Earth values add the neutral channel reading to each AI channel reading Refer to the following equation for an example of converting L N measurements to L Earth Line to Earth Alx Neutral where Ax is the analog input channel reading Neutral is the Neutral channel reading 26 nicom NI 9244 User Manual and Specifications Wiring for High Vibration Applications If an application is subject to high vibration National Instruments recommends that you either use ferrules to terminate wires to the detachable screw terminal connector Refer to Figure 13 for an illustration of using ferrules Figure 13 4 Terminal Detachable Screw Terminal Connector with Ferrule NI 9244 User Manual and Specifications National Instruments 27 Understanding NI 9244 Filtering The NI 9244 uses a combination of analog and digital filterin
14. g to provide an accurate representation of in band signals while rejecting out of band signals The filters discriminate between signals based on the frequency range or bandwidth of the signal The three important bandwidths to consider are the passband the stopband and the alias free bandwidth The NI 9244 represents signals within the passband as quantified primarily by passband ripple and phase nonlinearity All signals that appear in the alias free bandwidth are either unaliased signals or signals that have been filtered by at least the amount of the stopband rejection Passband The signals within the passband have frequency dependent gain or attenuation The small amount of variation in gain with respect to frequency is called the passband flatness The digital filters of the NI 9244 adjust the frequency range of the passband to match the data rate Therefore the amount of gain or attenuation at a given frequency depends on the data rate Figure 14 shows typical passband flatness for the NI 9244 28 nicom NI 9244 User Manual and Specifications Figure 14 Typical Passband Response of the NI 9244 0 025 0 000 a S oO 9 0 025 0 050 0 0 1 0 2 0 3 0 4 0 5 Frequency Data Rate Hz Stopband The filter significantly attenuates all signals above the stopband frequency The primary goal of the filter is to prevent aliasing Therefore the stopband frequency scales precisely with the dat
15. ine to Line L L Note You must use 2 wire ferrules to create secure connection when connecting more than one wire to a single terminal on the NI 9244 Circuitry Each channel on the NI 9244 provides an independent signal path and ADC Each terminal has the same input impedance to ground NI 9244 User Manual and Specifications National Instruments 17 The NI 9244 returns the voltage between each AI terminal and the Neutral terminal as well as the voltage between the Neutral terminal and the chassis ground Refer to Figure 6 for a diagram of the equivalent voltages the module returns Figure 6 Internal Circuitry for the NI 9244 Alo V 477 Alt All Leed Al2 Al2 Neutral ZEZ Neutral 4 4 5 v GND NI 9244 18 nicom NI9244 User Manual and Specifications To ensure that measurements to chassis ground are correct NI recommends connecting the chassis to earth ground using the chassis grounding screw Refer to your chassis manual for information about connecting the chassis to earth ground Connecting Phase Measurements You can connect three phase measurement configurations and single phase measurement configurations to the NI 9244 NI recommends using the following phase measurement configurations for typical power distribution networks Other valid connections are possible if the connections do not exceed the safety rating of the NI 9244 NI
16. ise the safety protection built into the product if the product is damaged in any way If the product is damaged return it to National Instruments for repair NI 9244 User Manual and Specifications National Instruments 3 Safety Guidelines for Hazardous Voltages If hazardous voltages are connected to the module take the following precautions A hazardous voltage is a voltage greater than 42 4 Vy or 60 VDC to earth ground A Caution Ensure that hazardous voltage wiring is performed only by qualified personnel adhering to local electrical standards Caution Do not mix hazardous voltage circuits and human accessible circuits on the same module Caution Make sure that devices and circuits connected to the module are properly insulated from human contact Caution When module terminals are hazardous voltage LIVE gt 42 4V 60 VDC you must ensure that devices and circuits connected to the module are properly insulated from human contact You must use the NI 9969 connector backshell kit to ensure that the terminals are not accessible gt gt 4 nicom NI 9244 User Manual and Specifications Figure 1 shows the NI 9969 connector backshell Figure 1 NI 9969 Connector Backshell NI 9244 User Manual and Specifications National Instruments 5 Safety Guidelines for Hazardous Locations The NI 9244 is suitable for use in Class I Division 2 Groups A B C D T4 hazardous locations Class I Zone 2 AEx nA
17. lution sees 24 bits Type Of A DC Delta Sigma with analog prefiltering Sampling Simultaneous Internal master timebase fy Frequency iecit 12 8 MHz JACCUTACY 100 ppm max Data rate range f using internal master timebase 1 613 kS s Maximum eee 50 kS s Data rate range f using external master timebase MiniMUM eee 390 625 S s Maximum 51 2 kS s NI 9244 User Manual and Specifications National Instruments 33 256 Data rates n 1 2 31 Input voltage ranges and Neutral to GND AlIx to Neutral Ku 997 5 Vox Minimum eee 992 Vox Overvoltage withstand 800 Vms continuous 1000 Vims for 1 s Surge withstand s 5 kV 1 2 ps 50 us Input coupling esses DC Input impedance AIx to Ground and Neutral to GND 2MQ The data rate must remain within the appropriate data rate range Refer to the Understanding NI 9244 Data Rates section for more information 34 nicom NI 9244 User Manual and Specifications Table 1 DC and AC Accuracy Percent of Percent of Reading Range Measurement Conditions Gain Error Offset Error Calibrated max 40 C to 70 C 0 17 0 14 Calibrated typ 23 C 5 C 0 043 0 012 U
18. m Indoor use only Environmental Management Nl is committed to designing and manufacturing products in an environmentally responsible manner NI recognizes that eliminating certain hazardous substances from our products is beneficial to the environment and to NI customers For additional environmental information refer to the Minimize Our Environmental Impact Web page at ni com environment This page contains the environmental regulations and directives with which NI complies as well as other environmental information not included in this document Refer to the Safety section for more information about altitude 46 nicom NI 9244 User Manual and Specifications Waste Electrical and Electronic Equipment WEEE X EU Customers At the end of the product life cycle all products must be sent to a WEEE recycling center For more information about WEEE recycling centers National Instruments WEEE initiatives and compliance with WEEE Directive 2002 96 EC on Waste and Electronic Equipment visit com environment weee axe SDE HE ROHS RS E National Instruments 4T t ES fa E 9 T dd rp REA dz da RoHS T National Instruments F El RoHS ZO TEESE ni com environment rohs_china For information about China RoHS compliance go to ni com environment rohs china Calibration You can obtain the calibration certificate and information about calibration services for the NI 9
19. ncalibrated max 40 C to 70 C 0 42 0 32 Uncalibrated typ 23 C 5 C 0 18 0 08 Range equals 565 7 V 400 Vims Note Accuracy specifications are valid for 1 1 LN and L Earth measurements Input noise at 50 kS s L Earth and N Famh 4 22 MV ims LN and 1 11 6 mV The module returns L N and N Earth values only Refer to Converting L N Measurements to L L and Converting L N Measurements to L Earth sections for details on changing the point of reference of the measurement NI 9244 User Manual and Specifications National Instruments 35 Note When measuring the amplitude of the Ka fundamental frequency over one or several power cycles the noise of the measurement reduces significantly theoretically with the square root of the number of samples in the acquisition window Nonlinearity at 25 24 ppm Stability Gain drift sess 5 ppm C Offset drift 6 mV C Post calibration gain match channel to channel max Up to 20 109 mdB Up to 10 kHz 39 mdB Up to 3 8 kHz eene 19 mdB Phase mismatch channel to channel 0 202 kHz Phase mismatch module to module max 0 202 kHz 360 Gd fu Phase nonlinearity f 50 kS s 0 kHz to10 0 02 max 0 kHz to 20 2 0 06 max 36 nicom NI 9244 User Manual and Specifications 5 Inp t
20. s junction boxes switches socket outlets in the fixed installation and stationary motors with permanent connections to fixed installations Measurement Category II is for measurements performed on circuits directly connected to the electrical distribution system This category refers to local level electrical distribution such as that provided by a standard wall outlet for example 115 V forU S or 230 V for Europe Caution Do not connect the NI 9244 to signals or use for measurements within Measurement Categories or IV Hazardous Locations US UL eset titre tte Class I Division 2 Groups A B C D T4 Class I Zone 2 AEx nA IIC T4 NI 9244 User Manual and Specifications National Instruments 41 Canada C UL Class I Division 2 Groups A B C D T4 Class I Zone 2 Ex nA 4 Europe DEMKO Ex nA IIC T4 Gc Safety and Hazardous Locations Standards This product meets the requirements of the following standards of safety for electrical equipment for measurement control and laboratory use EC 61010 1 EN 61010 1 e UL 61010 1 CSA 61010 1 EN 60079 0 2009 EN 60079 15 2010 60079 0 2007 Ed 5 IEC 60079 15 2010 Ed 4 e UL 60079 0 Ed 5 UL 60079 15 Ed CSA 60075 0 2011 CSA 60079 15 2012 Note For UL and other safety certifications refer to the product label or the Online Product Certification section 42 nicom N
21. t in the United States create your service request at ni com support or dial 1 866 ASK MYNI 275 6964 For telephone support outside the United States visit the Worldwide Offices section of ni com niglobal to access the branch office websites which provide up to date contact information support phone numbers email addresses and current events NI 9244 User Manual and Specifications National Instruments 49 Refer to the WI Trademarks and Logo Guidelines at ni com trademarks for more information on National Instruments trademarks Other product and company names mentioned herein are trademarks or trade names of their respective companies For patents covering National Instruments products technology refer to the appropriate location Help Patents in your software the patents txt file on your media or the National Instruments Patent Notice at ni com patents You can find information about end user license agreements EULAs and third party legal notices in the readme file for your NI product Refer to the Export Compliance Information at ni com legal export compliance forthe National Instruments global trade compliance policy and how to obtain relevant HTS codes ECCNs and other import export data 2014 National Instruments All rights reserved 376131B 01 Mar14
22. than Pollution Degree 2 A Caution The enclosure must have a door or cover accessible only by the use of a tool NI 9244 User Manual and Specifications National Instruments 7 Electromagnetic Compatibility Guidelines This product was tested and complies with the regulatory requirements and limits for electromagnetic compatibility EMC as stated in the product specifications These requirements and limits are designed to provide reasonable protection against harmful interference when the product is operated in its intended operational electromagnetic environment This product is intended for use in industrial locations There is no guarantee that harmful interference will not occur in a particular installation when the product is connected to a test object or if the product is used in residential areas To minimize the potential for the product to cause interference to radio and television reception or to experience unacceptable performance degradation install and use this product in strict accordance with the instructions in the product documentation Furthermore any changes or modifications to the product not expressly approved by National Instruments could void your authority to operate it under your local regulatory rules 8 nicom NI 9244 User Manual and Specifications Special Guidelines for Marine Applications Some products are Lloyd s Register LR Type Approved for marine shipboard applications To verify
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