The APQM-711 delivers class A analysis per IEC 61000-4-30 — voltage to ±0.1% Unom, frequency to ±0.01 Hz and class A flicker per IEC 61000-4-15 — on every network from 110 to 1000 V. A 10 MHz transient recorder captures ±8000 V phenomena as short as 650 ns, and the whole instrument is operated remotely over Wi-Fi or the mobile network.
Advantages
Evidence-grade measurements
Readings taken with the class A algorithms hold up in disputes with the utility and in contractual audits; unbalance is resolved to ±0.15% and powers are computed after Budeanu and IEEE 1459.
A microscope for transients
Sampling at 10 MHz makes switching and lightning surges up to ±8000 V visible with their complete waveform, down to a minimum recorded duration of 650 ns.
Operated from anywhere
The built-in GSM 4G LTE modem and the Wi-Fi module allow the analyser to be configured, followed live and downloaded from a PC or tablet, far from the zone of electromagnetic disturbances.
GPS with anti-theft alert
The GPS receiver synchronises the real-time clock of the records and sends an SMS notification if the instrument changes position during an unattended campaign.
Applications
- Certifiable power quality analysis in industry and distribution.
- Unattended measurement campaigns at substations and wide networks.
- Photovoltaic and wind farms analysed in four quadrants.
- Investigation of switching and lightning transients.
About the product
The APQM-711 has no display of its own: it is operated from the PC analysis software (Windows) or the mobile application (Android), which show waveforms, phasors, harmonics and interharmonics up to the 50th order and the event list in real time. Voltage and current events are recorded with waveforms up to 1 s and 30 s half-cycle RMS graphs.
It covers networks from 64/110 V to 480/830 V — that is, from 110 to 1000 V — in DC and from 40 to 70 Hz, with five voltage inputs and four current inputs accepting clamps up to 6 kA. Control signals up to 3000 Hz and the K factor of transformers complete the measurement, and reports follow EN 50160, IEEE 519 and NEC 220.87.
Available accessories: marked leads, crocodile clips, the AC-16 splitter, the AZ-3 power adapter, M4/M6 voltage adapters, a GPS antenna with GSM repeater, carrying case and calibration certificate; optionally flexible clamps from 1.5 to 6 kA, C-4A to C-7A clamps and ASX-1 piercing adapters; the Pro version adds four F-3A flexible clamps.
Technical specifications
| Measurement class | Class A per IEC 61000-4-30 |
| Voltage inputs | 5; networks from 110 to 1000 V; ±0.1% Unom |
| Transients | ±8000 V; 10 MHz sampling; from 650 ns |
| Current inputs | 4; up to 6 kA depending on the clamp |
| Harmonics | Orders 1…50 and interharmonics; K factor |
| Flicker | PST/PLT class A per IEC 61000-4-15 |
| Communications | GSM 4G LTE, Wi-Fi, GPS with anti-theft alert |
| Operation | PC software (Windows) and mobile app (Android) |
Frequently asked questions
When is class A worth it over class S?
Whenever the result must carry evidential weight — utility claims, supply contracts, audits — since class A of IEC 61000-4-30 guarantees standardised methods, uncertainty and time synchronisation.
How is an analyser without a screen operated?
From the PC software or the Android application: both configure the instrument, display the measurement in real time and download the records over Wi-Fi or the integrated 4G LTE modem.
What can the transient recorder capture?
Phenomena up to ±8000 V sampled at 10 MHz, with a minimum duration of 650 ns, each one linked to its complete waveform in the event list.
Which networks does it measure?
Networks from 64/110 V to 480/830 V, in DC and AC from 40 to 70 Hz, including star, delta and Aron configurations, with or without transducers.
