Verifying accuracy
9410 series
A warm-up time of 30 minutes is recommended before beginning energy accuracy
verification testing. At the factory, the meters are warmed up to their typical operating
temperature before calibration to help ensure that the meters will reach their optimal
accuracy at operating temperature.
Most high precision electronic equipment requires a warm up time before it reaches its
specified performance levels. Energy meter standards allow the manufacturers to
specify meter accuracy derating due to ambient temperature changes and self-
heating.
Your meter complies with and meets the requirements of these energy metering
standards.
For a list of accuracy standards that your meter complies to, contact your local
Siemens Industry representative or download the meter brochure from
www.usa.siemens.com/pds.
Reference device or energy standard
To help ensure the accuracy of the test, it is recommended that you use a reference
device or reference energy standard with a specified accuracy that is 6 to 10 times
more accurate than the meter under test. Before you start testing, the reference device
or energy standard should be warmed up as recommended by its manufacturer.
NOTE:
Verify the accuracy and precision of all measurement equipment used in
accuracy testing (for example, voltmeters, ammeters, power factor meters).
Energy pulsing
Your meter has energy pulsing LEDs and a digital output that can be used for energy
pulsing.
Your meter has energy pulsing LEDs, one visible light and one infrared. These LEDs
emit pulses that are then used to determine the accuracy of the meter’s energy
measurements. The pulses of light indicate accumulated energy; the meter’s
accumulations are compared with the reference/standard’s accumulated energy in
order to help determine the meter’s accuracy.
Your meter also has a digital output that can be used for energy pulsing. The relay
closes (low impedance) and then opens (high impedance) to represent a pulse. If the
accuracy testing equipment has a voltage requirement, a current-limited wetting supply
voltage must be provided.
NOTE:
Digital outputs on option modules should not be used meter accuracy testing.
Related Topics
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LED locations
Verifying accuracy test meter settings
Your meter ‘s power system and other parameters must be configured for accuracy
testing.
Meter parameter
Value
Volts mode
4W-Wye (4 wire Wye)
PT/CT correction
Disabled
7EN05-0336-01
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