SCE-2200 Differential Eddy Current Sensing System

Available in single- and dual-channel configurations with analog output.

Fig. 1. SCE-2200 differential eddy current sensing system

Applications

• Fast steering mirrors (FSMs)
• Telescope and microscope stabilization
• Image stabilization

Controllers

• Controller SCE-2200

The standard SCE-2200 controller, shown in Fig. 1, houses the electronics in an aluminum enclosure. It provides four MCX connectors for the sensor probes and a 9-pin Mini-D connector for power and I/O.

Fig. 2. Optional SCE-2200 controller configurations

• Optional controllers

Table 1. Optional controller versions (supplied without enclosures).

SCE-2210 Controller (Localized Component Version)

The SCE-2210 controller uses domestically produced chips and electronic components while maintaining performance comparable to versions built with imported components.

Fig. 3. SCE-2210 controller

Sensor Probes

The standard S0523 probe is normally available from stock with a 1.5 m cable and a straight MCX connector. Optional S0518, S0523L, and S0514P probes are supplied with a standard 0.5 m cable and can be customized to customer requirements. A straight MCX connector is standard; a right-angle MCX connector and other connector types, such as SMA, are available on request.

Fig. 4. Sensor probes and connector options

Fig. 5. Nominal null gap

Recommended Sensor Installations

Fig. 6. Translational displacement measurement

Fig. 7. Rotational or oscillatory displacement measurement

Specifications

Table 2. Differential eddy current sensor performance parameters

Parameter			Value	Unit	Notes
Measurement range			±0.25, ±0.50, ±0.90	mm
Nominal null gap			0.4, 0.65, 1.0	mm
Analog output			±10	V
Sensitivity			20	mV/μm	Typical
Nonlinearity			<0.5	%FSO
Resolution (p-p at 1 kHz)		At null	<0.004	%FSO
		At FSO	<0.015	%FSO
Thermal stability		At null	<0.005	%FSO/°C
		At FSO	<0.02	%FSO/°C
Power dissipation			<1	W	Dual channels
Frequency response			20	kHz	Default
Supply voltage			±15	V	at 53 mA
Output impedance			<1	Ω
Vacuum compatibility			10e-3	Pa
Weight	Sensor		227	g	Four sensors with 1.5 m cables
	Controller		170	g
Operating temperature			−40 °C to 80 °C
Storage temperature			−55 °C to 80 °C
FSO = full-scale output = 2 × measurement range.

Ordering Example

SCE-2200-S0523x4-2500 L

① ② ③ ④ ⑤

① Controller: SCE-2200 standard; SCE-2201, SCE-2209, SCE-2210, and SCE-2224 optional.

② Sensor probe: S0523 standard; S0518, S0523L, and S0514P optional.

③ Number of probes: 2 for a single-channel configuration or 4 for a dual-channel configuration.

④ Cable length: 1500 mm is standard and is omitted from the part number; enter 2500 for a 2500 mm cable.

⑤ Connector type: a straight MCX connector is standard and omitted from the part number; “L” specifies a right-angle MCX connector.

Configurations

Part number: SCE-2200-S0523x4-1500 — dual-channel configuration with analog output.

Controller: SCE-2200

Probes: four S0523 probes with 1500 mm cables
I/O cable: included

Fig. 8. SCE-2200-S0523x4-1500 configuration

Model: SCE-2209B-S0523x4-512
Output: dual-channel differential analog output
Controller: SCE-2209B
Probes: four S0523 probes with 500 mm cables
I/O cable: not included

Fig. 9. SCE-2209B-S0523x4-500 configuration

Model: SCE-2210-S0523x4-500 (localized component version)
Controller: SCE-2210
Probes: four S0523 probes with 500 mm cables
I/O cable: included

Fig. 10. SCE-2210-S0523x4-500 configuration