What is the significance of a negative indicator on a wattmeter

Step 2: Take photos. No excuses — everybody has a cell phone in their pocket! Photos are an easy way to remember important details about the installation without having to go back to the project site. If you ever have an issue and need to contact technical support, the photos can make it simple to explain your installation. If the two PCs in different time zones retrieve a data file from the logger, or read the logger clock, they will see different times.

Do the numbers make sense? Are the load current and watt measurements reasonable for the load? Example: If the current reads are 12 Amps for a HP motor, the readings are obviously too low. Check for possible problem in phase currents were balanced: The CTs might be placed on the wrong phase, not matching the Setup Table or the CT type in the Setup Table is incorrect.

Are the phase watts positive? If not, it is likely that the CT is installed backwards or the wire connection at the meter is reversed. Check these conditions.

NOTE: Negative values could be correct for co-generation applications such a wind or solar during power generation. For WYE loads, are the phase PF readings relatively close to each other when monitoring a balanced load?

If not, this can be caused by the CT being placed on the wrong phase or not matching the Setup Table If available, compare to external references within a percent or two — no two meters will read exactly the same. The reading of AC power is considered the real value and has a maximum range of Watts. While a reading is being taken with the power meter, the polarity changes automatically, if negative values are taken then a minus sign will apear on the device display.

Today, the power meter has many features such as, insulated current input, measurement of harmonics, current measurement, power measurement, etc. Price excl. The power meter PCE-PA power analyzer can be used as a desktop or portable instrument for measuring active power, apparent power, power factor, energy consumption, AC voltage, AC current, DC voltage, DC current, resistance and frequency. Data Cable and Test Leads - Software available in the accessories tab. ISO Calibration Certificate.

This versatile power analyzer can take single-phase and three-phase power measurements both in real time and over an extended time period. This Power Meter also measures parameters such as voltage, current, frequency, harmonics, and power as well as indicating, according to standard EN, harmonic values, interharmonics, and asymmetrics.

The power logging instrument is delivered manufacturer calibrated. An ISO calibration certificate may be ordered optionally.

This 3-Phase Power Meter also measures such parameters as voltage, current, frequency, hrmonics and power as well as indicting, according to standard EN, harmonic values, interharmonics and asymmetrics. ISO calibration certificate. This Power Meter also measures such parameters as voltage, current, frequency, harmonics and power as well as indicting, according to standard EN, harmonic values, interharmonics and asymmetrics.

The current measurement can be done with the built-in power measuring device 3-phase and directly. However, it is also possible to measure high currents by means of transducers using the built-in power meter PCE-ND In addition to the performance measurement of the power indicator PCE-ND30, it can detect voltage, current, and harmonics up to the 51st order. The power display can be used as 1 or 3 phase.