DC Bias Source Testing System combines the impedance analyzer 6632 with a DC bias source.This system is capable of analyzing the saturation characteristics of inductors, coils, ferrites, and magnetic cores. Additionally, it provides testing for the relative permeability (μr) to analyze key properties of magnetic materials. The system supports magnetic saturation current and temperature rise current scanning analysis, providing research and development engineers with fast and accurate current curve variations. When integrated into a production line, it offers the option of ammeter mode or multi-step mode. Measurement results are displayed numerically, and the system supports PC connectivity for storing test data and conducting report analysis.
Selection
| DC Bias Current Test System | |||||||
| 6632+ Series | |||||||
| Model | 6632+6210 | 6632+6220 | 6632+6223 |
6632+6225 |
6632+6240A |
6632+6243 |
6632+6243H |
| Frequency Response | 100Hz-3MHz | 100Hz-3MHz | 100Hz-10MHz | 100Hz-30MHz | 100Hz-3MHz | 100Hz-10MHz | 100Hz-10MHz |
| Output Current Max. | 10A | 120A | 120A | 20A | 320A | 320A | 640A |
| Power consumption | 320W | 320W | 320W | 320W | 640W | 640W | 640W |
| units of the DC Bias | 1 | 6 | 6 | 1 | 8 | 8 | 16 |
| Output Current (unit) | 10A | 20A | 20A | 20A | 40A | 40A | 40A |
The DC Bias Source 6240 will be discontinued on 2025/12/31 (service continues for 5 years)
Replacement models: 6240A
SPEC
|
Current Accuracy |
0.000A-1.000A 1%+5mA |
| 1.001A-5.000A 2% | |
| 5.001A-40.000A 3% | |
| DCR Test | ● |
| Constant power output | ● |
| Current switch |
● |
| (6632+6225 not supported) | |
| Graphic Scanning Analysis | Frequency graphic scanning analysis |
| Magnetic saturation curve (Isat) | |
| Rated current curve (Irms) |
Compitable with The Impedance Analyzer 6632/6632S Series
| Model |
6632-1 6632-1S |
6632-3 6632-3S |
6632-5 6632-5S |
6632-10 6632-10S |
6632-20 6632-20S |
6632-30 6632-30S |
6632-50 6632-50S |
|
Test Frequency |
10Hz- 1MHz |
10Hz- 3MHz |
10Hz- 5MHz |
10Hz- 10MHz |
10Hz- 20MHz |
10Hz- 30MHz |
10Hz- 50MHz |
| Equivalent Circuit Analysis | 6632S | |
| Frequency Setting | Continuity | |
| Frequency Output Accuracy | ±0.01% | |
| Frequency Resolution | 100mHz, 6-bit Frequency Input | |
| Basic Accuracy | ±0.08% (typical ±0.05%) | |
| AC Drive Level | Test Signal Voltage Level |
10mV - 2Vrms(100Ω) 10mV - 1Vrms(25Ω) |
| Voltage Minimum Resolution | 1mV | |
| Accuracy |
ALC ON：6％ * Voltage ±2mV ALC OFF：10％ * Voltage ±2mV |
|
| Test Signal Current Level | 200µA - 20mArms | |
| Current Minimum Resolution | 10µA | |
| Accuracy |
ALC ON：6％ * Current ± 20µA ALC OFF：10％ * Current ± 20µA |
|
| DC Drive Level | 1V (fixed) | |
| Output Impedance | 25Ω/100Ω (switchable) | |
| DC Bias Voltage |
Built-in ±12V (100Hz-50MHz) |
External Voltage Bias (±12V/±40V/±2000V) |
| DC Bias Current |
Option DC Bias Current Source (20A/60A/120A/320A) |
External Voltage Bias (100mA/1A) |
| Measurement Mode | Meter mode, list mode, sweep mode, and optional equivalent circuit analysis function (S model) | |
| Measurement Parameters |
|Z|、|Y|、θ、X、R、G、B、L、D、Q、DCR、C、 ESR、ε and μr |
|
| Test Time (Fastest) | < 3mS | |
6632 Measurement Parameters
| Parameters | Range |
| |Z| | 0.000 mΩ to 9999.99 MΩ |
| R, X | ± 0.000 mΩ to 9999.99 MΩ |
| |Y| | 0.00000 μS to 999.999 kS |
| G, B | ± 0.00000 μS to 999.999 kS |
| θRAD | ± 0.00000 to 3.14159 |
| θDEG | ± 0.000° to 180.000° |
| Cs, Cp | ± 0.00000 pF to 9999.99 F |
| Ls, Lp | ± 0.00 nH to 9999.99 kH |
| D | 0.00000 to 9999.99 |
| Q | 0.00 to 9999.99 |
| Δ | ± 0.00% to 9999.99% |
| Rdc | 0.00 mΩ to 99.9999 MΩ |
| εr' εr'' | 0 to 100000 |
| μr' μr'' | 0 to 100000 |
System
| Measurement Circuit | Series/Parallel | |
| Correction | Open Circuit/Short Circuit/Load correction | |
| Cable Compensation | 0 / 0.5 / 1 /2 (m) | |
| BIN | ABS、ΔABS、Δ%、OFF | |
| Comparator | 9 | |
| List Mode | 50 groups of Multi-steps setting (Each group contains up to 15 steps) | |
| Bulit-in Storge | 100 sets LCR setting documents, 50 groups of list mode setting | |
| USB Host Storge | LCR setting documents, list mode setting document, BMP graphics, Sweep screen and test result data | |
| Trigger Test | Auto, manual, RS-232, GPIB, Handler | |
| Power Supply | Voltage：88-264Vac | |
| Frequency：47-63Hz | ||
| Power consumption | 30VA | |
| Environment | Temperature：10℃-40℃ | |
| Humidity：20-90%RH | ||
| Dimension | DC Bias Current Source |
Impedance Analyzer |
|
(W*H*D) 356x147x497 mm/6225 356x145x644 mm/6243H/6243 356x145x525 mm/6240A 337x145x525 mm/6223 337x145x525 mm/6220 337x145x525 mm/6210 |
(W*H*D) 336x147x340 mm/6632 336x147x340 mm/6632S |
|
| Weight |
15 Kg (6225) 20 Kg (6243H/6243) 15 Kg (6223) 20 Kg (6240A) 15 Kg (6220) 15 Kg (6210) |
3.95 Kg (6632) |
| Display | - | Color Screen, 7" TFT (800*480) |
| Interface | RS-232、Handler | |
How DC Bias current helps inductor testing?
Ferromagnetic materials (like iron) are composed of microscopic regions called magnetic domains. The stronger the external magnetic field H, the more the domains align, yielding a higher magnetic flux density B. Eventually, The magnetization remains nearly constant, and is said to have saturated. The domain structure at saturation depends on the temperature.
What is magnetic saturation?
In electronic circuits, transformers and inductors with ferromagnetic cores operate nonlinearly when the current through them is large enough to drive their core materials into saturation. This means that their inductance and other properties vary with changes in drive current. In linear circuits this is usually considered an unwanted departure from ideal behavior.
Magnetic saturation current is called Isat, and the temperature rise current is called I rms. When the transformer and the inductor pass a large current in the actual circuit operation, the magnetic field of the magnetic core will produce magnetic saturation, which will cause the inductance characteristic to decline.
Therefore, the R&D engineer will set the current value of the inductance reduction allowable range.
Isat (Magnetic saturation current curve)
Irms (Rated current curve)
Using a DC Bias current source to apply a 200A bias current to the inductor, the inductance decreased from 2.06983uH to 1.02845uH.
Equivalent Circuit Analysis (Option)
It has seven different models, combine with different types of parameters ( R, L, C) help customers model the impedance versus frequency characteristics and self-resonant frequency (SRF).
Magnetic Material Test Fixture (FX-0000C8)
Using the magnetic material test fixture for measuring of permeability of various toroidal cores or ferrite cores and electromagnetic shielding coating materials, 6632 built-in formula to directly calculate the permeability coefficient value μr.
List Mode
50 groups of list mode setting (Each group contains up to 15 steps).
Standard Accessories
| Power Cord | |
| DIP Test Fixture-DC Bias Current (F6210) |  |
Optional Accessories
| PC Link Software | |
| SMD Test Fixture-DC Bias Current (F6220) |  |
| BNC+BNC cable | |
