Cautions For Use

About this product

Eco-POWE METER us designed chiefly to manage saving energy.
It is neither nor can it be legally used for billing.

Installation environment

Do not use the Unit in the following environments.

  • Where the unit will be exposed to direct sunlight and where the ambient temperature is outside the range of -25 to 55 ℃.
  • Where the ambient humidity is outside the range of 30 to 85 % RH (at 20℃), non-condensing and where condensation might occur by sudden temperature changes
  • Where inflammable or corrosive gas might be produced
  • Where the unit will be exposed to excessive airborne dust or metal particles
  • Where the unit will be exposed to water, oil or chemicals
  • Where organic solvents such as benzene, paint thinner, alcohol, or strong alkaline solutions such as ammonia or caustic soda might adhere to the product
  • Where direct vibration or shock might be transmitted to the product, and where water might wet the product
  • Where the place near high-voltage cable, high-voltage device, power line, power device.
  • Where the place near a machinery with transmission function such as amateur radio.
  • Where the place near a machinery which occurs the big switching serge

Please use the Unit according to the specifications described in this manual. Otherwise, it may malfunction or cause fire and an electric shock.

  • Connect to the power supply in compliance with the rating.
  • Refer to the wiring diagram to ensure proper wiring for the power supply, input and output.
  • Do not perform wiring or installation with a live line. It may also lead to circuit burnout or fire by way of the secondary CT side opening.


  • Eco-POWER METER is designed to be used in a control panel.
  • The power supply terminal and voltage input terminal of the main unit is common. Therefore if additional noise effects the power supply line, incorrect measurements may result.
  • Installation and wiring must be performed by expert personnel for electrical work or electric piping.
  • Never remove the terminal block under applying current to load.
    It might cause electric shock or CT breakdown.
  • Do not add an excess power to the display. It might break the inner liquid crystal.
  • Although the case is made from fireproof resin, do not mount it next to flammable materials. Also, avoid placing it directly on top of materials that catch fire easily.
  • If the operating power supply surge exceeds the following value, the internal circuit could be destroyed, so be sure to use a surge absorption element.
Surge voltage 6,000V

Standard surge waveform
The above value is the surge-voltage resistance at ±(1.2/50)μs of single-polarity full-wave voltage.

Surge wave form [±(1.2/50)μs single-polarity full-wave voltage]

Surge wave form
  • External noise up to the level shown below is treated as noise voltage, but levels higher than this could lead to malfunctioning or damage to the internal circuit. Although the case is made from fireproof resin, do not mount it next to flammable materials.
  Between operating power supply terminals
Noise voltage 1,500 V

Noise wave form (noise simulator)
Rise time : Pulse width : 1μs,50ns
Note) Accurate measurement may not be possible if excessive noise gets added to the input line.

  • This product is designed to be used only with our options.
    Options from other companies are not compatible.

As to measurement

  • If there is some distortion by harmonic or waveform, it may not measure correctly.
    Please check with the actual system before adopts it.
  • It might not measure an instantaneous current such as an inrush current or an welding machine.
  • When measuring the below loads, it might not satisfy with the accuracy guarantee.
    Out of rating current
    Load with low power factor
    Load with winding current
    Load with ferromagnetic field
  • Power factor operation is a method assuming balanced load. The error might be big when it measures unbalanced load.

Static electricity

  • Discharge static electricity touching the grounded metal etc. when you touch the unit.
  • Excessive static electricity might be generated especially in a dry place.


  • Wipe dirt of the main unit with soft cloth etc. When thinner is used, the unit might deform or be discolored.

Power supply

  • Connect a breaker to the voltage input part for safety reasons and to protect the device.
    The breaker that connects to the voltage input part must arrange at the position easily reached, and display shows it is the breaker of the equipment.
  • Do not turn on the power supply or input until all wiring is completed.

Before power on

Please note the following points when turning on power at the first time.

  • Confirm there are neither wiring rubbish nor especially an electrical conduction when installed.
  • Confirm neither the power supply wiring, the I/O wiring nor the power-supply voltage are wrong.
  • Tighten the installation screw and the terminal screw surely.
  • Use an electric wire applicable to the rated current.

Before change the setup

Set the password carefully.
In order to avoid unexpected change the settings, it can set password. However, if you forget the password you can’t change the settings.
We recommend you to note the password when you set and change the password.

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