MODEL 471: SINGLE PHASE METER TESTER

The Model 471 is a portable single phase kWh meter tester designed for testing direct connected meters. It is powered from an existing meter supply and contains a variable 30 Ampere current injection circuit, a Digital Signal processor to perform all of necessary voltage, current, power and energy measurements and a separate input and display processor for parameter entry and results display. With inbuilt current and volt- age compensation the Model 471 can achieve an accuracy to 0.05% which makes it ideal for testing any single phase meter.

HARDWARE FEATURES
Power Source

The Model 471 uses the existing service load as a supply to perform single phase meter tests. It has an internal solid state voltage supply which supplies the power required to drive the electronics within the unit.

OPERATING RANGES

• Measurable Voltage Range (AC)
  – Minimum: 70V
  – Maximum: 270V
• Selectable Current Ranges (A)
  – 0.1, 0.2, 0.5, 1.0, 1, 2, 3, 5, 10, 15, 30
• Selectable Power Factor
  – 30 deg Lag: 0.86 PF – 60 deg Lag: 0.5 PF – Unity

ACCURACY

• Energy measurement accuracy is: 0.05% over the following ranges:
  – 220V to 270V
  -0.5A to 30A
  -0.5PF lag to 1.0PF
  – 48Hz to 52Hz or 58Hz to 62Hz
• Accuracy of measured parameters
  – Displayed Voltage and Current to 1%. – Frequency to 0.1Hz
  – Phase Angle to 1 deg

RECORDS

500 records may be stored on the Model 471. The operator is able to download the records via USB cable and a communication program to a PC or laptop.

PROTECTION FEATURES

• Circuit breakers are used for overload protection.
• LED indicators are used to provide general status infor- mation on the 471.

POWER SUPPLY & CONSUMPTION
Mains Supply 100-270 VAC, 50/60Hz
Power Rating Max 30VA