CPL490 Capacitive Sensor Module

Description

Ultra Precise, Very High-Speed Measurements

• 50 kHz Bandwidth
• Very High Resolution, (Probe/Range dependent, see Ranges/Resolutions below for specifics)
  • 0.002% @ 50 kHz typical (as low as 260 picometers)
  • 0.0007% @ 15 kHz typical (as low as 90 picometers)
  • 0.0004% @ 1 kHz typical (as low as 50 picometers)
• User selectable bandwidth (1 kHz, 10 kHz, 15 kHz, 50 kHz)
• Linearity: 0.2%
• Small phase shift – excellent for servo applications
• 2nd Generation Probes for Maximum Performance

Convenient Output Interface and Range Selections

• Measurement Ranges Available: 10, 50, 100 µm (0.4, 2, 4 mils)
• ±10 V Output
• Easy National Instruments DAQ Connection via 68-Pin connector

Versatile, Useful Features

• Visual Range Indicator
• Adjustable Zero
• Zero Adjust Disable
• Single or Multiple Channel enclosures
• Front Panel Ground Connection

Life-Cycle Status: Active

Specifications

Typical specifications. Resolution and linearity depend on probe, range, and bandwidth. See Probes and Ranges for details.

Typical Resolution* @15 kHz,*	0.0007% F.S. rms
Bandwidths (-3dB) (PCB Dip-Switch)	50 kHz, 15 kHz, 10 kHz, 1 Hz
Linearity	0.2%F.S.
Error Band	0.3%F.S.
Maximum Drift, Typical*	0.04%F.S./°C
BNC Output Voltage	±10 V
BNC Output Impedance	0 ohms, 15 mA max
Rear Panel National Instruments Interface Connector Output Voltage	Differential ±10 V
Operating Temperature	15-40 °C
Multiple Channel Operation	Up to 3 Channels Contact us if more are needed

*Probe/Range dependent, see Range/Resolution table below

CPL490 Measurement Ranges/Resolutions – Probe Dependent

Listed specifications assume a 2 meter probe cable; flat measurement area diameter at least 1.3 times larger than the Sensing Area diameter; and no customizations.

1 mil = 0.001″

				Integral filters included in the CPL490					CPL490 uses 2nd Generation Probes
Sensing Area Diameter mm (Probe Model)	Measurement Range			Resolution* @ Bandwidth				Maximum Drift of Probe % F.S./°C	2nd Generation Probe
	Range Type	Range µm mils	Near Gap µm mils	1 kHz nm µin	10 kHz nm µin	15 kHz nm µin	50 kHz nm µin
0.5 (2G-C8-0.5)	Fine	10 0.4	20 0.8	0.05 0.002	0.07 0.003	0.09 0.004	0.26 0.010	0.04
	Standard	50 2.0	25 1.0	0.17 0.007	0.27 0.011	0.35 0.014	1.0 0.040	0.02
	Extended	100 4.0	50 2.0	0.38 0.015	0.80 0.031	1.0 0.039	3.3 0.14	0.03
1.2 (2G-C8-1.2)	Fine	50 2.0	25 1.0	0.15 0.006	0.20 0.008	0.22 0.009	0.63 0.025	0.02
	Standard	100 4.0	50 2.0	0.33 0.013	0.40 0.016	0.52 0.021	1.7 0.065	0.02
	Extended	200 8.0	100 4.0	0.68 0.027	1.0 0.040	1.3 0.050	3.8 0.15	0.02

* Resolution values are RMS. Peak-to-peak values are typically 8-10 times greater than the RMS values.
In high EMI conditions (10 V/m), output DC level may shift and noise may rise to 0.5 VRMS (2.5% resolution)
Custom calibrations can achieve exceptional resolution performance