Landis & Gyr MAXsys E850 Elite Accuracy Testing

Landis & Gyr MAXsys E850 Elite Accuracy Testing Manual pdf 1 page image

Accuracy TestingMAXsys Elite MeterThe accuracy testing for the Elite meter is done through the transmit “LED” of the optical porton the face of the meter. The optical port is located on the lower left hand side of the meter faceand the left “LED” is the transmit LED and is located on the left side of the port. The LED has 9modes of operation. Optical communications (type 7 protocol), Watt hour, Var hour,Compensated Watt hours Comp. 1, Compensated Var hours Comp. 1, Compensated Watt hoursComp. 2, Compensated Var hours Comp. 2, Compensated Watt hours Comp. 3 and CompensatedVar hours Comp. 3. The modes can be changed using MAXcom under the test mode screen. Themeter does not need to be put into test mode to change the LED modes. The mode of operationcan be seen on the meter display using the menu system. The user would enter the menu systemusing the buttons (E) on the face of the meter. They would then select “communications” fromthe list of menu items. This will take the user to a sub menu where they can select the opticalport. To select the optical port the user will select the “more ports” option that will bring upanother menu with “optical port”. After selecting “optical port” the screen will display the “CalPulse” mode .When testing for meter accuracy it is recommended that no test should be run for less than 30seconds. The 30 second test is recommended to reduce timing errors between the test equipmentand the meter. The following examples are for a Form9S, 120 volt meter with a Kh of 1.0 beingtested a rated voltage and a test current of 2.5 and 0.25 amps.Full Load 10 Rev. 40 secondsPower Factor 05 Rev. 40 secondsLight Load 02 Rev. 80 secondsWhen testing TLC accuracy the values meter is normally tested at the rated secondary value ofthe instrument transformer.The following examples are for a Form 9S, 120 volt meter with a Kh of 1.0 that is connect toinstrument transformers, VTR=7200:120 and CTR=1200:5. The tests are normally run at ratevoltage (120 volts) and a test current of % and 0.5 amps.Full Load 20 Rev. 40 secondsPower Factor 10 Rev. 40 secondsLight Load 04 Rev. 80 seconds

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