| Voltage inputs |
| Number of inputs |
4 (3 phase + neutral) dc-coupled |
| Maximum input voltage |
1000 Vrms |
| Nominal voltage range |
Selectable 1 V to 1000 V |
| Max. peak measurement voltage |
6 kV (transient mode only) |
| Input impedance |
4 MΩ//5 pF |
| Bandwidth |
> 10 kHz, up to 100 kHz for transient mode |
| Scaling |
1:1, 10:1, 100:1, 1,000:1 10,000:1 and variable |
| Current inputs |
| Number of inputs |
4 (3 phase + neutral) dc- or ac-coupled |
| Type |
Clamp or current transformer with mV output or i430flex-TF |
| Range |
0.5 Arms to 600 Arms with included i430flex-TF (with sensitivity 10x)
5 Arms to 6000 Arms with included i430flex-TF (with sensitivity 1x)
0.1 mV/A to 1 V/A and custom for use with optional ac or dc clamps |
| Input impedance |
1 MΩ |
| Bandwidth |
> 10 kHz |
| Scaling |
1:1, 10:1, 100:1, 1,000:1 10,000:1 and variable |
| Sampling system |
| Resolution |
16 bit analog to digital converter on 8 channels |
| Maximum sampling speed |
200 kS/s on each channel simultaneously |
| RMS sampling |
5000 samples on 10/12 cycles according to IEC61000-4-30 |
| PLL synchronization |
4096 samples on 10/12 cycles according to IEC61000-4-7 |
| Nominal frequency |
434-II and 435-II: 50 Hz and 60 Hz
437-II: 50 Hz, 60 Hz and 400 Hz |
| Display modes |
| Waveform display |
Available in all modes via SCOPE key
435-II and 437-II: Default display mode for Transients function
Update rate 5x per second
Displays 4 cycles of waveform data on screen, up to 4 waveforms simultaneously |
| Phasor diagram |
Available in all modes via Scope waveform display
Default view for Unbalance mode |
| Meter readings |
Available in all modes except Monitor and Transients, provides tabulated view of all available readings
Fully customizable up to 150 readings for Logger mode |
| Trend graph |
Available in all modes except Transients
Single vertical cursor with min max and avg reading at cursor position |
| Bar graph |
Provides 50/60** cycles of waveform information and associated 1/2 cycle rms values for Volts and Amps |
| Measurement modes |
| Scope |
4 voltage waveforms, 4 current waveforms, Vrms, Vfund. Arms, A fund, V @ cursor, A @ cursor, phase angles |
| Volts/amps/hertz |
Vrms phase to phase, Vrms phase to neutral, Vpeak, V Crest Factor, Arms Apeak, A Crest Factor, Hz |
| Dips and swells |
Vrms½, Arms½, Pinst with programmable threshold levels for event detection |
| Harmonics dc, 1 to 50, up to 9th harmonic for 400 Hz |
Harmonics Volts, THD, Harmonic Amps, K factor Amps, Harmonic Watts, THd Watts, K factor Watts, Interharmonic
Volts, Interharmonic Amps, Vrms, Arms (relative to fundamental or to total rms) |
| Power and energy |
Vrms, Arms, Wfull, Wfund., VAfull, VAfund., VAharmonics, VAunbalance, var, PF, DPF, CosQ, Efficiency factor, Wforward, Wreverse |
| Energy loss calculator |
Wfund, VAharmonics, VAunbalance, var, A, Loss Active, Loss Reactive, Loss Harmonics, Loss Unbalance, Loss Neutral, Loss Cost (based upon user defined cost / kWh) |
| Inverter efficiency (requires optional dc current clamp) |
Wfull, Wfund, Wdc, Efficiency, Vdc, Adc, Vrms, Arms, Hz |
| Unbalance |
Vneg%, Vzero%, Aneg%, Azero%, Vfund, Afund, V phase angles, A phase angles |
| Inrush |
Inrush current, Inrush duration, Arms½, Vrms½ |
| Monitor |
Vrms, Arms, harmonic Volts, THD Volts, PLT, Vrms½, Arms½, Hz, dips, swells, interruptions, rapid voltage changes, unbalance and mains signalling.
All parameters are measured simultaneously in accordance with EN50160 Flagging is applied according to IEC61000-4-30 to indicate unreliable readings due to dips or swells |
| Flicker (435-II and 437-II only) |
Pst(1min), Pst, Plt, Pinst, Vrms ½, Arms ½, Hz |
| Transients (435-II and 437-II only) |
Transient waveforms 4x Voltage 4x Amps, triggers: Vrms ½, Arms ½, Pinst |
| Mains Signaling (435-II and 437-II only) |
Relative signaling voltage and absolute signaling voltage averaged over three seconds for up to two selectable signaling frequencies |
| Power Wave (435-II and 437-II only) |
Vrms½, Arms½ W, Hz and scope waveforms for voltage amps and watts |
| Logger |
Custom selection of up to 150 PQ parameters measured simultaneously on 4 phases |
| General specifications |
| Case |
Design Rugged, shock proof with integrated protective holster
Drip and dust proof IP51 according to IEC60529 when used in tilt stand position
Shock and vibration Shock 30 g, vibration: 3 g sinusoid, random 0.03 g 2 /Hz according to MIL-PRF-28800F Class 2 |
| Display |
Brightness: 200 cd/m 2 typ. using power adapter, 90 cd/m 2 typical using battery power
Size: 127 mm x 88 mm (153 mm/6.0 in diagonal) LCD
Resolution: 320 x 240 pixels
Contrast and brightness: user-adjustable, temperature compensated |
| Memory |
8GB SD card (SDHC compliant, FAT32 formatted) standard, upto 32GB optionally
Screen save and multiple data memories for storing data including recordings (dependent on memory size) |
| Real-time clock |
Time and date stamp for Trend mode, Transient display, System Monitor and event capture |
| Environmental |
| Operating temperature |
0 °C ~ +40 °C; +40 °C ~ +50 °C excl. battery |
| Storage temperature |
-20 °C ~ +60 °C |
| Humidity |
+10 °C ~ +30 °C: 95 % RH non-condensing
+30 °C ~ +40 °C: 75 % RH non-condensing
+40 °C ~ +50 °C: 45 % RH non-condensing |
| Maximum operating altitude |
Up to 2,000 m (6666 ft) for CAT IV 600 V, CAT III 1000 V
Up to 3,000 m (10,000 ft) for CAT III 600 V, CAT II 1000 V
Maximum storage altitude 12 km (40,000 ft) |
| Electro-Magnetic-Compatibility (EMC) |
EN 61326 (2005-12) for emission and immunity |
| Interfaces |
mini-USB-B, Isolated USB port for PC connectivity
SD card slot accessible behind instrument battery |
| Warranty |
Three years (parts and labor) on main instrument, one year on accessories |
| Phase angle Measurement range: |
-360° … +360° |
| Included accessories |
| Power options |
BC430 Power Adapter
International plug adapter set
BP290 (Single capacity Li-ion battery) 28Wh (7 hours or more) |
| Leads |
TL430 Test lead and Alligator clip set |
| Color coding |
WC100 color coding clips and regional decals |
| Flexible current probes |
i430flex-TF, 24 inch (61cm) length, 4 clamps |
| Memory, Software and PC connection |
8 GB SD card
PowerLog on CD (includes operator manuals in PDF format)
USB cable A-Bmini |
| Carrying case |
C1740 Soft Case for 434-II and 435-II
C437 Hard Case with rollers for 437-II |