Exploring Multi-Channel Digital Power Meters

Multi-Channel Digital Power Meters

Chroma 66203/66204

Wiring mode function allows the user to take accurate power measurements for various wiring modes 1P2W/ 1P3W/ 3P3W/ 3P4W/ 3V3A

Voltage Range

15/30/60/150/300/600 Vrms

Current Range

0.005/ 0.02/ 0.05/ 0.2/ 0.5/ 2/ 5/ 20 Arms

Frequency Range

DC, 15Hz~10kHz

Chroma’s Digital Power Meters are designed for both single-phase and multiple phase measurements of AC power signals and related parameters common to most electronic products. Instead of traditional analog measurement circuits the 66200 Digital Power Meter uses state-of-the-art DSP digitizing technology. The internal 16 bits analog/digital converters with sampling rates of up to 200KHz provide both high speed and high accuracy measurements which is unprecedented within the industry for this class of power meters current on the market.

Average Mode and Integration Mode for Power Measurement

When using a traditional power meter, unstable measurement data can occur if the UUT power consumption levels are unstable or operating in non-linear modes (i.e. power supply hiccup modes). This is due to load current conditions which maybe different for different measurement aperture windows (T1, T2, T3 and T4). A simple averaging calculation can only provide a visual stable value but still lose some transient data.

A Window Mode method that calculates all data within the user-defined window time (Tw) is recommended so users can get a real average value without any data loss. An accumulated energy approach method (i.e. integration mode) for power measurements is also provided. This integration mode calculates active power values by integrating energy from V and I in a user-defined time period (Ti).

The 66200 meters provide a 10 mA minimum current range with crest factor 4, and 0.1 mW measurement resolution for low power application (<10W), and less than 2% uncertainty even for No-Load mode power measurements. These functions make 66200 an ideal choice for ENERGY STAR / IEC 62301 / ErP measurement requirements.

THD Measurement

The 66203 and 66204 Digital Power Meters can measure voltage and current Total Harmonic Distortion (THD) directly which can be displayed in percentage format. For ENERGY STAR requirements, users need to verify the THD of AC supply voltage when supplying the UUT in the specified mode not to exceed 2%, up to and including the 13th harmonic (as specified in IEC 62301).

Both models also provide a function to define a user-specify distortion order n, (n is from 2 to 50) for measuring harmonic distortion. Thus, the instrument can easily measure distortion values as required by the ENERGY STAR requirements.

More Features

Half Rack Size, Up to 4 Input Modules

Wide Current Range

PASS/FAIL Indications

Voltage/Current Harmonics Measurements

Chroma power meters include a four-part display with 7-segment LED front panel readouts. Users can easily select desired parameters and readouts at the touch of a button. Models also include optional remote control using USB or GPIB interfaces via rear panel connections. These instruments are packaged in a 2U high, half-rack enclosure suitable for benchtop or system integration.

Model Options

Model	Description
66203	Digital Power Meter (3ch)
66204	Digital Power Meter (4ch)
Accessories
10606	Softpanel KIT
A662010	Rack Mount Kit for 1 unit
A662012	1200V HV Measurement Kit
A662014	External CT 100A/rms
A662015	Voltage and current measurement cables [66204]
A662016	Voltage and current measurement cables [66203]
A662023	1800V HV Measurement Kit [66203/66204/66205]