434-II - Measuring instrument FLUKE - Free user manual and instructions
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| Product Type | Power Quality Analyzer |
| Brand | Fluke |
| Model | 434-II |
| Dimensions | 265 x 190 x 130 mm (10.4 x 7.5 x 5.1 in) |
| Weight | ~2.5 kg (5.5 lb) including batteries and input modules |
| Power Supply | Li-ion battery pack (7.2 V, 4.2 Ah) or AC adapter (15 V, 3 A) |
| Battery Life | Up to 4 hours typical |
| Display | Color LCD, 5.7 in, 640 x 480 pixels |
| Measurement Functions | Voltage, current, power, harmonics, flicker, unbalance, transients, dips/swells, interruptions |
| Sampling Rate | 10.24 kHz per channel, 16-bit resolution |
| Input Channels | 4 voltage (up to 1000 Vrms CAT III), 4 current (via clamps or Rogowski) |
| Data Storage | Internal memory (up to 1000 logs), USB and SD card slots |
| Communication | USB host/device, Ethernet, optional Wi-Fi adapter |
| Standards | IEC 61000-4-30 Class A, IEC 61000-4-15 (flicker), IEEE 1459 |
| Safety Rating | 1000 V CAT III / 600 V CAT IV |
| Maintenance | Clean with dry cloth; no user-serviceable parts inside; battery replacement by qualified technician |
| Spare Parts / Reparability | Replacement battery, input modules, leads, clamps; repairs by Fluke service centers |
| Included Accessories | 4 voltage test leads, 4 alligator clips, 4 current clamps (i400s), battery, charger, USB cable, carrying case |
| General Information | Three-phase power quality analyzer; supports 50/60 Hz and 400 Hz systems; multiple languages; touchscreen interface |
Frequently Asked Questions - 434-II FLUKE
How do I set up the Fluke 434-II for a basic power quality measurement?
Connect the voltage test leads to the appropriate phases (L1, L2, L3, N) and attach current clamps to each phase. Power on the analyzer, select the desired measurement mode (e.g., Power & Energy, Harmonics) from the main menu, and press the green start button. Ensure the correct wiring configuration (e.g., 3-phase wye) is set in the setup menu.
What does the 'Unbalance' measurement indicate?
Voltage and current unbalance measure the degree of asymmetry in a three-phase system. The Fluke 434-II calculates the negative-sequence and zero-sequence components per IEC 61000-4-30. High unbalance can cause motor heating and equipment malfunction.
How can I capture a transient event?
Set the analyzer to 'Transients' mode and define the threshold levels (e.g., 10% above nominal). The instrument continuously monitors and captures waveforms when the threshold is exceeded. You can view the transient waveform on the screen and store it to memory.
What is the maximum voltage I can measure directly?
The Fluke 434-II is rated for 1000 V RMS CAT III and 600 V RMS CAT IV. For higher voltages, use external voltage transformers. Never exceed the rated input limits to avoid damage or shock.
How do I update the firmware on the 434-II?
Download the latest firmware from Fluke's website. Copy the firmware file to a USB flash drive formatted as FAT32. Insert the drive into the analyzer's USB port, go to 'Setup' > 'Maintenance' > 'Firmware Update', and follow the on-screen instructions. Do not power off during the update.
What should I do if the battery does not charge?
First, check that the AC adapter is properly connected and the power source is working. If the battery still doesn't charge, try a different outlet. If the problem persists, the battery may need replacement. Use only Fluke-approved batteries (part number 434-II-BAT). Contact Fluke service for assistance.
Can I use the Fluke 434-II on a 400 Hz system?
Yes, the 434-II supports 400 Hz systems. In the 'Setup' menu, set the nominal frequency to 400 Hz. Note that some measurement functions like flicker are not applicable at 400 Hz per IEC standards.
How do I download data to a PC?
Connect the analyzer to your PC via USB cable or Ethernet. Use Fluke's Power Quality Analyzer Software (PQAS) or Fluke Energy Analyze Plus. The instrument appears as a removable drive or can stream data through the network. Transfer recorded logs as CSV or PQDIF files.
What does 'Class A' mean for the 434-II?
Class A refers to the highest accuracy class for power quality instruments as per IEC 61000-4-30. The 434-II meets Class A for all parameters, ensuring reliable and repeatable measurements suitable for regulatory and contractual compliance.
How do I replace the current clamp?
The Fluke 434-II uses interchangeable current clamps (e.g., i400s, i430). To replace, disconnect the clamp from the input module, remove the old clamp, and attach the new one by aligning the connector and locking mechanism. Ensure the clamp is rated for the expected current range.
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USER MANUAL 434-II FLUKE
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Product information
Brand : FLUKE
Model : 434-II
Category : Measuring instrument