Power Quality Analysers PQM-702, PQM-703, PQM-710 and PQM-711 are high-tech meters providing their users with comprehensive features for measuring, analysing and recording parameters of 50/60 Hz power networks and power quality in accordance with the European Standard EN 50160. Analysers are fully compliant with the requirements of IEC 61000-4-30:2008, Class A.

The power quality analysers are equipped with five voltage measurement inputs, installed as cables terminated with banana plugs marked as L1, L2, L3, N and PE. The range of voltages measured by four measurement channels is up to ±1500V (the device has two voltage sub-ranges). This range may be increased by using additional external voltage transformers.

Measurements are carried out using four current inputs installed on short cables terminated with clamp terminals. The terminals may be connected to the following clamp types: flexible claps (marked as F-1, F-2, F-3) with nominal rating up to 3000 A (differing from others only by coil diameter); and hard clamps marked as C-4 (range up to 1000 A AC), C-5 (up to 1000 A AC/DC), C-6 (up to 10 A AC) and C-7 (up to 100 A AC). The values of nominal measured currents may be changed by using additional transducers – for example, using a transducer of 100:1 ratio, the user may select C-6 clamps to measure currents up to 1000 A.


Main Differences Between Analysers





10 MHz transient detection module

433 MHz radio interface (with OR-1 receiver)

Wi-Fi interface

Dedicated tablet in standard equipment



The devices have a built-in 8 GB memory card. To guarantee fast data download, the analyser is equipped with a built-in mass-storage reader, which ensures the data download is in MB/s. Data read-out may be also be carried out by one of the three available communication links: USB, OR-1 radio receiver, and GSM modem.

The devices are complete with a built-in GSM modem (UMTS standard) and an antenna. This solution provides an almost unrestricted access to the analyser from any chosen global location within an available GSM network. On the left side of its housing the analyser has a slot for a M2M SIM card, which is required for data transmission via GSM networks.

Another advantage of the device is the built-in GPS receiver, making the analyser fully compliant with the requirements of IEC 61000-4-30 Class A, without the need of installing additional accessories. The GPS receiver ensures the synchronization with UTC (Universal Time Clock), and provides measurement accuracy of tens of nanoseconds. GPS receivers may receive satellite signals in the open air; therefore synchronization with the built-in antenna is possible only outside of buildings. When the analyser is used indoors the device should be connected to an external GPS antenna located outside the building. This external antenna ensures the availability of the GPS signal,. The external antenna is an additional accessory.

Recorded parameters are divided into groups that may be independently turned on/off for recording purposes and this solution allows for efficient management of the space on the memory card. Parameters that are not recorded, leave more memory space for further measurements.

The analyser has an internal power supply adapter operating in a wide input voltage range 90…760 V AC (127…760 V DC), which is provided with independent cables terminated with banana plugs.

An important feature of the device is its ability to operate in harsh weather conditions. The analyser may be installed directly on electric poles. The ingress protection class of the analyser is IP 65, and operating temperature ranges from -20°C to +55°C.

Uninterrupted operation of the device (in case of power failure) is ensured by an internal rechargeable lithium-ion battery.
The user interface includes a colour 3.5″ LCD display with a resolution of 320×240 pixels and a keypad with four buttons.
The full potential of the device may be released by using dedicated PC software “Sonel Analysis”. The software also allows for export of the data in a format suitable for Power Quality Health Check.

The analyser can communicate with a PC in the following ways:

• via USB connection with a transmission speed up to 921.6 kbit/s; available data reading from a memory card with a speed of a few MB/s,
• via radio interface – using OR-1 receiver with a transmission rate of 57.6 kbit/s (range limited to approx. 5 m),
• via Wi-Fi radio interface with effective transmission rate up to 300 kB/s (max. sustained speed in a 10 m distance),
• via GSM connection using the Internet.

In order to use the first mode of wireless communication, the OR-1 receiver must be connected to a PC using its USB port. Communication in this mode is slower than USB, so we recommend this method is used to only view live parameters of the measured network and for the configuration and control the analyser. It is not recommended to read a large amount of data stored on the memory card via a radio link, due to the speed of this type of data transmission.

The PQM-710 and PQM-711 analysers are supplied with a dedicated tablet, which is preconfigured to work with the meter. After the tablet is turned on, it activates “Sonel Analysis” software, which automatically finds the assigned analyser. The tablet acts as an Access Point, which is used to connect the analyser through wireless transmission (Wi-Fi).

GSM network transmission requires an active user’s M2M SIM card to be inserted into the slot of the analyser. The card should have the service of data transmission activated and a static IP number. A PC connected to the analyser, must have access to the Internet.

The PQM-703 and PQM-711 analysers additionally enables the user to measure transient voltages in the range of ±6 kV with a sampling rate from 100 kHz to 10 MHz. Measuring circuits for transients is independent from the rest of voltage measurement made at the voltage inputs L1, L2, L3, N, PE. The analysers have four measurement channels: L1-PE, PE-L2, L3-PE and N-PE. The recording time for waveforms is set with a user-defined pre trigger time and detection threshold, while the number of recorded samples is up to 20000 per channel (2 ms for 10 MHz sampling).

The analysers has a built-in power adapter with nominal voltage range of 90…760 V AC or 127…760 V DC. The power adapter has independent lines (red) marked with letter P (power). To prevent the power adapter from being damaged by under voltage, it automatically switches off when powered with input voltages below approx. 80 V AC (110 V DC).

To maintain power supply to the device during power outages, the internal rechargeable battery is used. It is charged when the voltage is present at terminals of the AC adapter. The battery is able to maintain power supply for up to 2 h hours at temperatures of -20…+55°C. After the battery is discharged the meter stops its current operations (e.g. recording) and switches off in the emergency mode. When the power supply from mains returns, the analyser resumes interrupted recording.

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