Portable power quality analyser with a 7-inch touchscreen and class S recording
Built around the largest touchscreen in its class, the APQM-707 records the parameters of DC and 50/60 Hz networks following class S of IEC 61000-4-30. Voltages up to 760 V on five inputs, currents up to 6 kA depending on the clamp, harmonics to the 50th order, flicker, unbalance and inrush current are configured, viewed and reviewed directly on the instrument.
Advantages
Standardised class S results
Voltage is measured to ±0.5% Unom, current to ±0.2% Inom and frequency to ±0.05 Hz between 40 and 70 Hz, with every parameter recorded using the normalised algorithms of IEC 61000-4-30.
A screen instead of menus
The 7-inch, 800 × 480 pixel colour touchscreen shows the oscilloscope view, phasor diagram, time plots and harmonic bars at a glance, and the supplied stylus keeps it usable with dielectric gloves on.
Recording that outlasts the campaign
More than 10 years of data fit on the removable memory card, the internal Li-Ion battery rides through supply interruptions, and the analyser can draw its power from the very network under test.
Every event fully documented
Dips, swells and interruptions are stored together with their waveforms and half-cycle RMS plots, while the built-in energy cost calculator prices the consumption on the spot.
Applications
- On-site troubleshooting of disturbances in industrial and commercial networks.
- Energy audits with on-board energy cost calculation.
- Commissioning and inspection of photovoltaic installations.
- Power quality service providers and consultants.
About the product
Beyond the class S core, the APQM-707 measures P, Q, D and S powers, energies, cosφ, tanφ and power factor, harmonics with THD, flicker PST/PLT, unbalance and inrush current. Its CAT IV 600 V measurement category and IP51 housing with a hinged lid qualify it for harsh field conditions.
The PC analysis software supplied as standard downloads the memory card, displays live readings and produces reports to EN 50160, IEEE 519 or NEC 220.87, including dedicated reports for photovoltaic micro-installations up to 50 kW. Four 3 kA flexible clamps belong to the standard delivery.
Available accessories: four F-3A flexible clamps, 2.2 m leads marked L1, L2 and L3, crocodile clips, the AC-16 line splitter, magnetic voltage adapters, an 11.1 V Li-Ion battery, the Z-7 power adapter, USB cable, stylus and carrying case; C-4A to C-7A clamps and flexible probes up to 6 kA are optional.
Technical specifications
| Measurement class | Class S per IEC 61000-4-30 |
| Voltage inputs | 5 (L1, L2, L3, N, PE); 0…760 V; ±0.5% Unom |
| Current inputs | 4; up to 6 kA depending on the clamp; ±0.2% Inom |
| Harmonics | Voltage and current, DC and orders 1…50; THD |
| Flicker and unbalance | PST/PLT 0.40…10.00; unbalance 0…10% |
| Display | 7-inch colour touchscreen; 800 × 480 pixels |
| Recording | Removable memory card; over 10 years |
| Safety | CAT IV 600 V; IP51 housing |
Frequently asked questions
What does class S mean in practice?
That every parameter — voltage, frequency, harmonics, flicker, unbalance, events — is measured with the standardised methods of IEC 61000-4-30, so the results are comparable between instruments and valid for audits.
Is a computer required on site?
No. Configuration, live viewing and data review are handled on the touchscreen; the PC software is reserved for in-depth analysis and EN 50160, IEEE 519 and NEC 220.87 reporting.
Which current clamps can be connected?
Flexible clamps from 1.5 to 6 kA and C-4A to C-7A clamps from 12 to 1000 A; the C-5A also measures direct current. Four 3 kA flexible clamps come in the standard set.
Does it keep measuring during an outage?
Yes. The internal Li-Ion battery sustains measurement and recording through the interruption — essential when the goal is precisely to document those outages.
Can it assess photovoltaic installations?
Yes. The software produces dedicated reports for micro-installations up to 50 kW, including the breakdown of active power states.
