Description
Microtest 6621-20 Bench LCR Meter
Key Features
- Frequency range: DC, 10Hz to 1/3/5/10/20/30MHz
- Output Impedance 25Ω/100Ω, switchable
- Ultra-high measuring speed <3ms
- Basic accuracy up to ±0.05%
- Automatic Level Control Function
- Open circuit/Short circuit/Load Correction Function
- Built-in DC Bias Voltage ±12V (Option OP-662102)
- External DC Bias Current Source (Option 6621+ Series)
- Support Meter Mode and List Mode
- Display 4 Sets of Parameters at Once
- Simultaneous AC/DC Measurement
- Comparator Function and Handler BIN Classification Function
- Support RS-232/ Handler/ LAN/ USB Host/ USB Device interfaces
- Supports GPIB Interface (Option OP-662101)
- Store Setup Files, Measurement Data, and Screenshots via USB
- Supports PC Software
Applications
| Measurement Units Explained | |
|---|---|
| μʹ / μʹʹ: relative permeability (magnetic properties) | εʹ / εʹʹ: dielectric constant (electrical storage) |
| Ls / Lp: series / parallel inductance | Q / Qm: quality factor / mechanical quality |
| SRF: self-resonant frequency | I sat / I rms: saturation / continuous current |
| Cs / Cp: series / parallel capacitance | D: dissipation factor (energy loss) |
| ESR / DCR / Rs: equivalent series / DC / series resistance | C-V: capacitance vs voltage |
| Z: impedance | Cgd / Cgs / Cds: MOSFET capacitances |
| Fp / Kp: resonance frequency / coupling factor | DC Bias: effect of DC voltage on capacitance |
| Application | Measurement |
| Magnetic material | μʹ / μʹʹ |
| Dielectric / ceramics | εʹ / εʹʹ |
| Voice coil motor | Ls / Q / Qm / SRF |
| Hearing aids | Ls / Q / Qm / SRF |
| Piezoelectric element | Cs / Cp / D / Fs / Fp / Kp |
| Quartz crystal | Cs / Cp / D / Fs / Fp / Kp |
| Wireless charging | Ls / Q / SRF / DCR / Rs |
| NFC / RFID | Ls / Q / SRF / DCR / Rs |
| Battery | ESR / Cs / Cp / D |
| MLCC | Cs / Cp / D / Q / ESR / DC Bias |
| Capacitance | Cs / Cp / D / Q / ESR / DC Bias |
| Diode | Cs / Cp / D |
| Inductance | Ls / Lp / Q / SRF / I sat / I rms |
| Wafer | C-V |
| LED Light board | Z / Cs / Cp / D |
| MOSFET | Cgd / Cgs / Cds |





























































































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Microtest 6621 Datasheet













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