1250 Analizador de Respuesta de Frecuencia                                                                

The 1250 FRA is an instrument which is capable of meeting today's measurement requirements for dynamic system analysis. Using the single sine measurement technique it provides precise data relating to the gain and phase between any points in a dynamic system. This instrument enables researchers to perform searching analysis to assess performance or characterize both simple or complex systems.

The device under test is stimulated by a sinewave generated by the 1250 FRA and the response analyzed at one or more points in the system. These responses are then correlated with the applied stimulus to determine the amplitude and phase relative to the generator. The ratio of the two signals can then be calculated to provide the system transfer function.

The process rejects all harmonics and, by increasing the integration time even signals buried in noise can be accurately measured.

The 1250 FRA has been used to engineer and optimize a variety of performance parameters for measurement systems including:

• Servo systems
• Hydraulic actuators
• Electromechanical components

The system has the following options available:

• Sincronizador - Opción 12501
• Modulador Demodulador - Opción 12502

Sincronizador
If it is required to measure the phase shift in the carrier system itself, then it is necessary that the generator of the frequency response analyser is locked to the carrier in both frequency and phase. This is accomplished using the optional synchroniser, which operates over the full frequency range of the instrument. The synchroniser also enables the generator to be locked to a rotating or reciprocating component, and measurements can then be made relative to this.

Modulador Demodulador
The optional modulator/demodulator interfaces the 1250 to ac carrier systems. Individual switching of either the modulator or demodulator, and full control of the analysis channels that are being demodulated, ensure the multi-channel flexibility. The response of the systems ac components, dc components and indeed the integral system modulators and demodulators can all be measured at the same time.

Generador

Frequencia

- Rango

10µHz to 65kHz

- Resolución

1 in 65535

- Error

<0.01%

- Sweep

Logarithmic, up or down linear, up or down harmonic

Amplitud

- Range

10mV to 10.23V (triangle: 5.11V)

- Resolution

1 in 1023

- Error

<1% ± 1 digit

Bias - Polarización

- Rango

-10.23 to +10.23V

- Resolution

1 in 1023

- Error

<1% ± 1 digit

Distortion

<2%

Maximum output

- Bias + signal

15V peak

- 1250N

20V peak

Output impedance

50W+2%

- 1250N

<1W

Maximum voltage, Lo to ground

150V

Impedance, Lo to ground

100kW, 100pF

Stop control

Immediate or at 0º, 90º, 180º, 270º

Stop input

Contract closure or TTL logic 0

Connection

- Front

Floating, 4mm

- Rear

Floating, BNC

Output is short-circuit proof

Analizadores (el 1250 dispone de 2 y el 1254 dispone de 4 Analizadores)
Rango Nominal	Sensibilidad	Full scale pk input	Com. mode rejected
30mV	1uV	45mV	30V
300mV	10uV	500mV	30V
3V	100uV	5V	30V
30V	1mV	50V	500V
300V	10mV	500V	500V
Sensitivity is for integration time >100ms

Maximum input, Hi or Lo to ground	500V peak, 300V rms
Coupling	dc or ac (<1dB at 2.5Hz)
Configuración de entrada
Connection
- Front	differential, 4mm
- Rear	differential, BNC
Impedance, Hi or Lo to ground	1MW
- Front sockets	<70pF
- Rear sockets	<100pF
Common mode rejection, dc coupling, up to 100Hz
- Up to 50V peak	>65dB
- Over 50V peak	>60dB
Cross channel isolation, 1kW across inputs
- Up to 10kHz	>100dB
Integration time
- Minimum	the longer of 1 cycle or 10ms
- Maximum	10^6 cycles or 10^5s
Auto-integration
- Minimum	the longer of 3 cycles or 1.5s
- Maximum	the programmed integration time
Variance in results, at 90% confidence
- Long integration (signal >0.02% range)	<1%
- Short integration (signal >0.2% range)	<10%
Measurement delay	Variable from zero to 10^6 cycles or 10^5s

Sincronizador - Opción 12501

Input configuration

Connection

differential, rear terminals

Coupling

dc or ac (<3dB at 3Hz)

Impedance, Hi or Lo to ground

>200kW, <100pF

Common mode rejection, dc coupling up to 100Hz

>50dB

- Maximum rejected

20

Maximum input, Hi or Lo to ground

350V peak, 250V rms

Sincronización

Frequency range

1mHz to 65kHz

Sensitivity

0.25V

Level adjustment

±5V in steps of 0.02V

Time to synchronise

the longer of 4 cycles or 500ms

Opción Modulador/Demodulador -12502

Input configuration

Connection

differential, rear terminals

Coupling

ac

Impedance, Hi or Lo to ground

>100kW, <100pF

Common mode rejection, up to 100Hz

>50dB

Maximum common mode

300V

Maximum input, Hi or Lo to ground

350V peak, 250V rms

Portadoras 1 and 2

Frequency range

48Hz to 20kHz

Voltage range

6V to 250V rms

Salida Generador

May modulate either carrier 1 or carrier 2

Carrier phase shift

- 50Hz to 300Hz

<3º

- 300Hz to 3kHz

<1º

- 3kHz to 20kHz

<6º

Analizadores

Either carrier may demodulate any analyser

Quadrature rejection

- 1250 y 1254

>26dB

- 1251

>14dB

Additional errors when demodulating

Mod frequency = 0.05xcarrier

Input >10% full scale, integration time

200ms

- r

<0.5%

- log r

<0.05dB

- q, single channel

<0.5º

- q, point to point

<1º

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Equipos Instrumentación y Control S.L.

Urbanización Prado Norte, c/ Fresno 1 – bis 28110 Algete – MADRID

Telf.: 91 628 0817 Fax: 91 628 0453 Email: info@eiccontrol.com