IBS CPL350 User manual

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CPL350

Last update: 2022-05-19
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Table of Contents
1APPROVALS AND SAFETY CONSIDERATIONS 3
2OVERVIEW 3
3SYSTEM CONTENTS 3
4CALIBRATION 3
5USING THIS MANUAL 4
6HELPFUL TECHNICAL SUPPORT DOCUMENTS ONLINE 4
7CONNECTING TO THE CPL350 5
7.1 PROBE CONNECTIONS 5
7.2ANALOG OUTPUT BNC CONNECTOR 5
7.3 POWER &DIFFERENTIAL ANALOG OUTPUT CONNECTOR 5
8CHANGING BANDWIDTH 7
9SPECIFICATIONS 8
10 MECHANICAL DATA 8
11 OPTIONAL MOUNTING FLANGE 9

Last update: 2022-05-19
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1Approvals and safety considerations
The CPL350 is compliant with the following CE standards:
Safety: EN 61010-1:2010
EMC: IEC 61326-1:2013, IEC 61326-2-3:2013
To maintain compliance with these standards, the following operating conditions must be maintained:
•All I/O connecting cables must be shielded and less than three meters in length
•Use the included CE approved power supply. If an alternative power supply is used, it must have equivalent
CE certification and provide safety isolation from the mains according to IEC60950 or 61010.
•Sensors must not be attached to parts operating at hazardous voltages in excess of 33VRMS or 70VDC
Use of the equipment in any other manner may impair its safety and EMI protections.
2Overview
The CPL350 Capacitive Displacement Sensor provides one channel of noncontact displacement measurement
for precision position and displacement applications. This manual will provide you with all the information you
require to get the greatest benefit from your system.
Engineers, technicians, and maintenance personnel will find the CPL350 invaluable for high precision
measurements of mechanical displacement where contact with the target is not possible nor advisable. Targets
such as high-speed rotating spindles, or parts that could be damaged or deflected by contacting probes can be
measured with confidence and accuracy.
3System contents
Your system includes this manual, the CPL350 Capacitive Sensor electronics, power supply, one probe, and a
NIST traceable calibration sheet.
4Calibration
Your system was calibrated with a precision calibrator designed by Lion Precision. The system is calibrated with
nanometer precision. All of our calibrations are traceable to NIST.
IBS Precision Engineering recommends that you have your system recalibrated at the factory once a year to
ensure maximum accuracy.

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5Using this manual
In this manual you will find information for connecting and using your CPL350. Once you become familiar with the
system, you will only need to refer occasionally to this manual for specifications or to verify connection
information.
6Helpful Technical Support Documents Online
The IBS Precision Engineering’s website has a large selection of technical documents (TechNotes and Application
Notes) in the Technical Library. These documents provide detailed descriptions of the operation and use of the
products of IBS Precision Engineering.
The Technical Library can be accessed at:
https://www.ibspe.com/expertise/technical-resources
Some of the titles include:
•Understanding Capacitive and Inductive Sensors
•Comparing Capacitive and Inductive Sensors
•Z-height Measurement with Non-contact Sensors
•Sensor Operation and Optimization
•Using Capacitive Sensors in Vacuum Applications
•Understanding Electrical Runout When Using an Eddy-Current Sensor for Roundness Measurements
•Inductive Probe Cabling Considerations

Last update: 2022-05-19
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7Connecting to the CPL350
7.1 Probe Connections
To Connect the Probes
1. Insert the probe cable connector into the “Probe” connector on the CPL350.
2. Rotate until the red dots on the connectors align.
3. Push the connector in until it clicks.
To Disconnect the Probes
1. Pull on the knurled barrel of the probe connector which will release the latching mechanism.
CAUTION: The probe cannot be disconnected by pulling on the cable.
7.2 Analog Output BNC Connector
Single-Ended ±10 V
Analog output is ±10 V. The output voltage becomes more positive as the probe gets closer to the target. The
scaling of the output (i.e. V/mm) is dependent on the probe and calibration specified when ordered. The complete
calibration information is available on the NIST traceable calibration sheet provided with the sensor.
7.3 Power & Differential Analog Output Connector
9-Pin, Male, D-Sub connector with 4-40 mounting hardware.
Pin Assignments
Pin
Connection
1
Ground
2
NC
3
–15 VDC
4
+15 VDC
5
NC
6
Non-Inverted Analog Output
7
Inverted Analog Output
8
Ground
9
Ground
Power Supply Requirements
The power supply provided with your CPL350 provides the required ±15VDC input power. If using your own
power supply, be aware that high-frequency noise from a switching-type power supply may appear in the output.
For high resolution results, be sure to provide clean power.

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Differential Outputs
The Non-Inverted and Inverted outputs are used together as a differential output. Differential outputs help
eliminate electrical noise induced into the connecting wires by noise sources such as computers, power
transformers etc.
The Non-Inverted output voltage becomes more positive (relative to ground) as the probe nears the target. The
Inverted output voltage becomes more negative (relative to ground) as the probe nears the target. The Non-
Inverted and Inverted outputs are each ±5 VDC relative to ground; the differential output is therefore ±10 VDC.
CAUTION: Do NOT connect the outputs to ground or the unit will be damaged.
Differential Outputs as Single-Ended
The Non-Inverted or Inverted outputs can be used as a ground referenced single ended output, but the sensitivity
will be half of that indicated on the calibration sheet. For instance, a differential output calibrated for 1 V/mm will
produce 0.5 V/mm when used as a single-ended output.
Signal Ground Connection
A ground connection screw is provided for an optional ground connection to data acquisition devices. Connecting
the CPL350 ground and data acquisition ground may improve performance. Consult your data acquisition manual
for more details.

Last update: 2022-05-19
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User Manual | P7
8Changing bandwidth
Higher bandwidths allow you to accurately measure faster moving targets.
Lower bandwidth reduces the noise on the output and creates higher resolution.
The CPL350 is set to 15 kHz unless specified otherwise in the order and on the calibration sheet received with
the system.
Two switches inside the enclosure set the bandwidth. To change them:
•Remove the 4 screws that attach the front panel to the cover.
•Bandwidth is controlled by positions 3 and 4 of DIP-switch S1.
CAUTION: DO NOT CHANGE ANY OTHER SWITCHES
Set the desired bandwidth according to this table:
S3
S4
Bandwidth
ON
ON
100 Hz
ON
OFF
1 kHz
OFF
ON
10 kHz
OFF
OFF
15 kHz

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9Specifications
Resolution*
0.004% F.S. at 15 kHz typical, dependent on calibration
Linearity Error
±0.5% F.S. typical, dependent on calibration
Error band
±1.0% F.S. typical, dependent on calibration
Bandwidth (–3 dB)
DIP Switch selectable
100 Hz, 1 kHz
Operating Temperature
4º-50ºC
Probe Thermal Stability
0.04% F.S./ ºC
Output Impedance
0Ω
Output Voltage Max
±13.5 VDC
Output Max Current
20 mA
Power Output
+15 VDC (±5%) @ 95 mA max
–15 VDC (±5%) @ 95 mA max
* RMS; Peak-to-peak value 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 0.25 VRMS (1.3% resolution).
10 Mechanical Data

Last update: 2022-05-19
IBS Precision Engineering • Eindhoven • NL • [phone]
User Manual | P9
11 Optional Mounting Flange
An optional flange for easy mounting of the CPL350 is available (P017-6455). The flange attaches to the bottom of
the device with four flathead screws (included in the flange kit).
CPL350 With Attached Mounting Flange