1260 Analizador de Impedancia

Introducción
El Analizador Solartron 1260 de Fase/Ganancia es sin duda el Analizador de Respuesta de Frecuencia y de Impedancia/Fase-Ganancia más potente, preciso y flexible que disponible hoy. Es usado diariamente por los investigadores principales donde son una prioridad la fiabilidad experimental e integridad de las medidas.
La sólida reputación del 1260A es respaldada frecuentemente en trabajos publicados en campos tan diversos como:

• Corrosion studies.
• Battery research and fuel cells.
• Solar cells.
• LCDs.
• Bio-materials.
• Dental research.
• Electronic component development.
• Civil engineering.
• Coatings research.
• Composite materials.

Part of Solartron's extensive range of precision products designed to provide cost-effective solutions for dc and ac analysis
in electrochemical and materials research, 1260 offers an outstanding measurement specification for impedance spectroscopy.

Benefits/Features:

• Frequency range 10microHz to 32MHz.
• Frequency resolution: 1 in 65million (0.015ppm).
• 0.1%, 0.1° accuracy.
• Resolution to 0.001dB, 0.01°.
• Measures impedances >100Mohms.
• 2-, 3- and 4-terminal measurement configurations.
• Polarization voltage up to ±40.95V.
• Automatically sweeps frequency, amplitude or bias.
• Null, normalize and auto-impedance modes.
• Gain, phase, group delay and impedance measurements.
• Built in statistical analysis.
• Displays a,b,r,q,t,Z,R,X,Y,G,B,L,C,Q,D,D%.
• Operates standalone or within a computer-controlled system.
• Renowned Zplot software package simplifies experiments and optimizes throughput.

Aplicaciones:
- Dielectric loss angle measurement for insulators
- Effects of moisture and aging in transformer oils
- Conduction mechanisms in ceramics for fuel cells and solid electrolytes
- Optimization of sensor mechanisms in gas detectors
- Biological organ and tissue studies
- Prediction of strength and hardness of concrete
- Curing of epoxy resins
- Strength of composite materials
- Dental research
- Liquid crystal display (LCD) research

Medidas de Impedancia
Virtually every liquid and solid is able to pass current when a voltage is applied to it. If a variable (ac) voltage is applied to the material, the ratio voltage to current (V/I) is known as the impedance. In many materials, especially those which are not generally regarded as conductors of electricity, the impedance varies with the frequency of the applied voltage changes, in a way that is related to the properties of the liquid or solid. This may be due to the physical structure of the material, to chemical processes within it, or to a combination of both. Thus, if a measurement of impedance over a suitable frequency range is made, and the results plotted on suitable axes, it is possible to relate the results to the physical and chemical properties of the material.

Since impedance measurement is repeatable and non-destructive, it can provide valuable insights into the behavior of a huge variety of substances, components and systems.
For example, measuring the impedance of a sample of concrete can yield information about the water content and proportions of the constituents, leading to an estimate of the final strength of the material. Again, the impedance plot of a sample of organic tissue - anything from a piece of fruit to a human kidney - can reveal its condition and suitability for storage, freezing or transplant.

The advantages of impedance measurement over other techniques include:

• Rapid acquisition of data (often within minutes)
• Accurate, repeatable measurements
• Non-destructive
• Highly adaptable to a wide variety of different applications.

Materials Characterization
The wide frequency range and superb accuracy of the 1260 enables many different mechanisms to be investigated to characterize material behavior, predict lifetime and failure rates, and for improving fabrication and curing processes.

Particular benefits of using 1260 for materials investigations include:

• Direct measurement of impedance from 10mohms to >100Mohms
• Null and normalize functions eliminate effects of leads and sample chambers
• DC polarization up to ±40.95V
• Wide frequency range covers most applications
• Unsurpassed resolution can reveal small but critical changes in material behavior
• Wide range of display and output formats
• Can form the heart of a dielectric test system to extend impedance measurement into Gohm range.

LabView drivers are available for the 1260 FRA from National Instruments

Especificaciones

Generador	Modo Voltaje	Modo Corriente
Amplitud AC
- para frequencias < 10MHz	0 a 3V rms	0 a 60mA rms
- para frequencias > 10 MHz	0 a 1V rms	0 a 2mA rms
Máxima resolución AC	5mV	100µA
Rango Polarización DC	±40.95V	±100mA
Resolución DC máxima	10mV	200µA
Impedancia de salida	50W ±1%	>200kW a <1kHz

Frecuencia
- rango	10µHz a 32 MHz
- Resolución máxima	10µHz
- error	±100ppm
- estabilidad, 24 horas ± 1ºC	±10ppm
Tipos de barridos	Frecuencia (log o lin), voltaje AC, voltaje DC, corriente AC, corriente DC
Voltaje máximo
- Hi a Lo	±46V peak
- Lo a tierra	±0.4V peak
Corriente máxima	±100mA peak
Impedancia
Medida de Impedancia	>100 Mohms*
- Lo a tierra	100kW, <10nF
Conexión	Single BNC, Floating shield
Output disable	Contact closure or TTL logic 0

Entradas	Voltaje (2×)	Corriente
Rangos	30mV, 300mV, 3V	6µA, 60µA, 6mA, 60mA
Resolución Máxima	1µV	200pA
Full scale peak	±5V	±100mA
Entradas protegidas hasta	±46V	±250mA
Conexión	Single/Differential BNC	Single BNC
Pantallas	Floating/Grounded	-
Acoplamiento	DC o AC (-3dB a 1Hz)	DC o AC (-3dB a 1Hz)
Impedancia de Entrada
- hi a pantalla	1Mohm, <35pF	³600µA rango, 1W
- Pantalla a tierra	10kohm, 330pF	<600µA rango, 50W

Límites de error
Ambient temperature 20 ± 10ºC, integration time, >200ms. Data valid for one year after calibration.

Gain - Phase Measurements
Applies to all ranges at >10% full scales.

Results
Variable
- Frequency
- AC amplitude
- DC bias
Parámetros Medidos
- Voltage Gain
- Phase
- Real
- Imaginary
- Z, R, X, Y, G, B, V, I
- Group delay
- C, L, Q, D

Medidas de impedancia
Applies for stimulation level 1V for impedances >50W or 20mA for impedances <50W, using 12601A.

Impedance Ranges (resolution 5 digits). Medidas de Impedancia: >100 Mohms*
Capacidad
- 1pF a 10mF
Resistencia
- 10mW a 100MW
Inductancia
- 100nH a 1000H

Interfaz para conexión a PC
Usar NI-GPIB tipo PCI o adaptador USB/GPIB.

Software ZPlot y SetTemp para control de 1260 y Hornos con secuencias automáticas.

Celda portamuestras GF-800 (800ºC) y GF-1000 (1000ºC) para medidas en sólidos a 2 o 4 electrodos, con paso de gas.

* Combinar con 1296 para mayores rangos de impedancia, hasta 100 TOhm.

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