TIDUFI2 April   2026

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
  8. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
    3. 2.3 Highlighted Products
      1. 2.3.1 AMC131M03
      2. 2.3.2 MSPM0G1506
      3. 2.3.3 MSPM0L2228
      4. 2.3.4 ISO673IDWR
      5. 2.3.5 TRS3232EIDBR
      6. 2.3.6 TPS70933DBVR
      7. 2.3.7 CDC6C
  9. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Hardware Requirements
      1. 3.1.1 Shunt Resistor Requirements
      2. 3.1.2 PCB Layout Requirements
      3. 3.1.3 Component Placement Requirements
      4. 3.1.4 Thermal Management Requirements
      5. 3.1.5 Isolation Requirements
      6. 3.1.6 EMI and EMC Considerations
    2. 3.2 Software Requirements
      1. 3.2.1 TIDA-010999 Metrology
      2. 3.2.2 GUI Operation
      3. 3.2.3 Voltage and Current Measurements
    3. 3.3 Test Setup
    4. 3.4 Test Results
      1. 3.4.1 Test Number One: Determination of the Initial Intrinsic Error
      2. 3.4.2 Test Number Two: Starting Current
      3. 3.4.3 Test Number Three: No-Load Conditions
      4. 3.4.4 Test Number Four: Voltage Variation, Voltage Measurement Port
  10. 4Design and Documentation Support
    1. 4.1 Design Files
      1. 4.1.1 Schematics
      2. 4.1.2 BOM
      3. 4.1.3 PCB Layout Recommendations [Optional Section]
        1. 4.1.3.1 Layout Prints [Optional Section]
  11. 5Tools and Software
  12. 6Documentation Support
  13. 7Support Resources
  14. 8Trademarks
  15. 9About the Author

3.4.3 Test Number Three: No-Load Conditions

Objective: This test is to make sure that the meter does not produce pulses when the current is not flowing through the meter.

Perform this test at Vmin.

Equation 3. ∆ t ≥ 3.6 × 10 6 b × m × k × V min ⁡ × I m i n h o u r s

where

  • B = accuracy at the specified class in Imin range = accuracy class of interest (0.2)
  • K = test pulses = 10000
  • M= number of elements = 1
  • Imin = minimum current = 0.5
  • Vmin = minimum voltage = 90V

Requirement: The meter must not produce more than one test pulse during the time specified from Equation 3.

Table 3-3 No-Load Conditions Test Results
CLASS CLASS A CLASS B CLASS C CLASS D CLASS E
TIME IN H 0.0800 0.1333 0.2000 0.5000 1.0000
TIMER SETTING 04:48 08:00 12:00 30:00 01:00:00
REGISTERED PULSES 0 0 0 0 0

Summary: The meter passes Class E for this test. The meter did not accumulate any pulses when there is no current flowing through the meter.