This section mainly showed the basic function and specification comparison between Saluki STB8851 and Hioki IM7581 Impedance Analyzer.
Saluki STB8851 Series Precision Impedance Analyzer is a new generation impedance test instrument by adopting the current international advanced automatic balance bridge principle. It is based on Windows 10 operating system, which realizes a fully computerized operation interface, making the measurement more intelligent and easier. Achieving the measurement frequency from 10Hz to 130MHz.
Hioki IM7581 offers a top measurement time of 0.5ms over a 100kHz to 300MHz frequency range, making it ideal for high volume production of ferrite chip beads and chip inductors.
Because Saluki STB8851 adopts the technology of broadband auto-zeroing type auto-balancing bridge, although the frequency test range is not as wide as Hioki IM7581, it can achieve ideal measurement accuracy in the frequency range of 10Hz-130MHz and impedance range of 1mΩ-100MΩ. Among them, the highest accuracy can reach 0.08%, which is much higher than the accuracy of impedance analyzers and network analyzers of radio frequency reflection measurement methods such as Hioki IM7581. The fastest test speed can reach 2.5ms, which is very suitable for some applications that require dynamic analysis.
Compared with Hioki IM7581, Saluki SH2851 has greatly improved in terms of impedance measurement parameters, test resolution, scanning parameters, scanning type, number of channels, etc., and a variety of interface types can be connected to the keyboard and mouse for operation, and then equipped with the 10.1-inch capacitive touch screen can greatly improve the user experience.
Table 1 Comparison table between Saluki STB8851 and Hioki IM7581
| Brand | Saluki | Hioki |
| Model No. | STB8851 | IM7581 |
| Frequency Range | 10 Hz to 130 MHz | 100 kHz-300MHz |
| Impedance Parameters | |Z|, X, R, L, C, D, Q, |Y|, G, B, θ, Vac, Iac, Vdc, Idc, Rdc | |Z|,X,R,L,C,D,Q,|Y|,G,B,θ,Rdc |
| Measurement Terminal | Four-terminal pair | Three-terminal pair |
| Measurement Speed | Six-level, 0: 2.5ms, 1: 4ms, 2: 10ms, 3: 40ms, 4: 80ms, 5: 400ms | The Fatest 0.5ms（FAST, Analog measurement time, representative value） |
| Highest Accuracy | 0.08% | 0.72% |
| AC Signal Source | 5mV – 2000mVrms / 0.05uA – 20mArms | 4mV-1001mVrms / 0.09 mA-20.02mArms |
| Resolution | 1mHz | 10Hz |
| Test principle | Automatic balance bridge | RF reflection measurement |
| Output Impedance | 25Ω/100Ω | 25Ω |
| Sweep Parameter | Freq, ACV, ACI, DCV BIAS, DCI BIAS | Freq, ACV, ACI |
| Sweep Type | Linear, log, segment | Linear, log |
| Number of measurement Points | 2 to 1601 | 1 to 801 |
| Number of Channels | 4 | 1 |
| Power consumption | 120VA | 70VA |
| Interface | RS232C, USB HOST, USB DEVICE, LAN, GPIB, VGA, HDMI , HANDLER | LAN, USB, RS232(Option), HANDLER |
| Display | 10.1-inch color capacitive touch screen | 8.4-inch Touch Screen |
