Lion Precision ECL202 User manual

www.lionprecision.com/two-year-warranty/ Document No. M016-3461.019
1Oakdale, MN, USA www.lionprecision.com 651-484-6544
ECL202/ECL202e USER’S GUIDE
Eddy-Current Displacement Sensor

www.lionprecision.com/two-year-warranty/ Document No. M016-3461.019
2Oakdale, MN, USA www.lionprecision.com 651-484-6544
TABLE OF CONTENTS
APPROVALS AND SAFETY CONSIDERATIONS 3
ECL202 AND ECL202e 3
Description 3
QUICK START INSTRUCTIONS 3
FRONT PANEL CONTROLS AND INDICATORS 4
LED Range Indicator 4
Oset Button 4
Resetting Oset 4
Setpoint Button 5
ANALOG OUTPUT SIGNAL 5
Interpreting the Output Voltage 5
Change in gap calculation: 5
REMOTE OFFSET AND SETPOINT 5
SETPOINT SWITCH OUTPUT 5
BANDWIDTH SELECTION (ECL202 ONLY) 5
MAXIMIZING PERFORMANCE 6
Extension Cables 6
Probe Mounting 6
Ungrounded Targets 6
Multiple Sensors 6
CONNECTING TO THE ECL202 7
SPECIFICATIONS 9
MECHANICAL DETAIL 11

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APPROVALS AND SAFETY CONSIDERATIONS
ECL202 AND ECL202e
The ECL202e is identical to the ECL202 except that the ECL202e resolution is never better than
0.2 µm. For this reason, the ECL202e does not require an export license.
This manual will only refer to the ECL202, but all instructions apply to the ECL202e except
where noted.
Description
The Lion Precision ECL202 Eddy-Current Displacement Sensor provides high resolution,
noncontact measurement of position changes of a conductive target. The system consists of
driver electronics and a probe calibrated for a specic material and range. The calibration
information is detailed on a calibration certicate which is shipped with the system.
The ECL202 provides a linear analog voltage proportional to changes in the target position and a
digital switched (setpoint) output with a user programmed switching setpoint.
QUICK START INSTRUCTIONS
The ECL202/ECL202e is compliant with the following CE directives:
Safety: 61010-1:2001
EMC: 61326-1, 61326-2-3
To maintain compliance with these standards, the following operating
conditions must be maintained:
• All I/O connecting cables must be less than three meters in length
• AC power cables must be rated at a minimum of 250 V and 5 A
• AC power must be connected to a grounded mains outlet rated less than 20 A
• Power supply must have CE certication 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 30 VRMS
or 60 VDC
• All external connections must be SELV (Safety Extra Low Voltage).
Use of the equipment in any other manner may impair the safety and EMI protections of the
equipment.
1. Connect the probe to the ECL202.
The ECL202 is calibrated to a specic probe identied by serial number. The probe
serial number must match the “USE PROBE S/N” label on the front of the ECL202.
2. Connect the output to a monitoring device.
3. Connect then apply power.
4. Adjust the probe position so the Range Indicator shows green
NOTE

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FRONT PANEL CONTROLS AND INDICATORS
LED Range Indicator
The Range Indicator monitors and displays the probe position within its calibrated range. The
graphic below shows the indicator condition at various points within the calibrated range.
The LED Range Indicator is independent of the output voltage and not aected by the Oset
button. Shifting the output voltage by using the Oset button may allow an apparently valid
output voltage to exist while the probe is out of range. When the Near or Far LED is red, the
probe is out of range and the output voltage is not a reliable indication of the target position.
Oset Button
Pushing the Oset button shifts the DC level of the output voltage to the center of the voltage
range (i.e. 5 V for a 0-10 V output). The button will only function when the probe is in the
center 20% of its calibrated range (center green LED). If the center green LED on the Range
Indicator is not on, the Oset button will not function.
This function establishes a repeatable master point for reference measurements.
1. Place good part in the measurement area
2. Position probe to center 20% of range (center indicator LED)
3. Press Oset button
4. All subsequent measurements indicate deviation from center of range (5 V)
Resetting Oset
Hold the Oset button for four seconds to remove any output DC shift.
Near GapFar Gap
Out of
Range
Out of
Range
Red Blue Green Green Green Blue Red
20%
CALIBR ATED RANGE
40% 60%
Center
80%
ECL202
FAR
NEAR

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Setpoint Button
The ECL202 provides an adjustable setpoint at which a switched output activates. The output
switch closes when the output voltage is more positive (larger gap) than the user-adjusted
setpoint. Pressing the Setpoint button will set the threshold voltage to the current output
voltage. The setpoint includes a 0.085V hysteresis, requiring that the sensor output drop 0.085V
below the setpoint voltage before the switched output opens.
ANALOG OUTPUT SIGNAL
The output signal is an analog voltage of 0-10 VDC. The output voltage is proportional to the
probe-target gap. As the probe-target gap increases, the voltage becomes more positive. See
the included calibration certicate for specic information.
Interpreting the Output Voltage
Output voltage change for a given change in the probe-target gap is called sensitivity. The
sensitivity is listed on the calibration certicate.
Change in gap calculation:
Gap Change = Voltage Change / Sensitivity
For example: With a sensitivity of 1V/2 µm and a voltage change of +3 V, the probe-target gap
has increased by 6 µm.
REMOTE OFFSET AND SETPOINT
SETPOINT SWITCH OUTPUT
BANDWIDTH SELECTION (ECL202 ONLY)
The front panel Oset and Setpoint buttons can be activated remotely. Each remote input
connects to an optoisolator. The functions are activated by applying 15-24 V to the remote
control input terminals.
Because the remote operation mimics front panel operation, activating the Oset
function for more than four seconds will restore factory default value for Oset.
When the output voltage is more positive than the user adjusted setpoint voltage, the output
switch contacts will close. These contacts have a maximum resistance of 2.5 Ω and can conduct
up to 250 mA. The maximum voltage that can be switched is 30VAC/60VDC. The output is a
solid state switch closure and can conduct AC or DC.
A jumper wire on the bandwidth connector selects sensor bandwidth. To select a bandwidth,
connect the desired bandwidth terminal to the Bandwidth Select contact. With no jumper, the
bandwidth is 15 kHz. Bandwidth specications are -10%/+30%.
NOTE

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MAXIMIZING PERFORMANCE
Extension Cables
Sensors which are calibrated with a probe extension cable must be operated with the extension
cable to meet specications. Operating without the extension cable will result in inaccurate
measurements.
Probe Mounting
If multiple probes are mounted together, they must be separated by at least three probe
diameters.
The area within 3 probe diameters to the sides and 1.5 diameters behind should be kept clear of
any metallic objects other than the object to be measured. Otherwise, custom calibration will be
required.
Ungrounded Targets
Ungrounded targets have the potential to inject noise into the sensor. If the output is unusually
noisy, be sure the target is grounded. On moving/rotating targets this can be accomplished with
a small metal brush or thin piece of metal which is connected to ground.
Multiple Sensors
When multiple sensors are used with the same target, the sensors must be synchronized. An
interconnecting circuit board connects to the rear of multiple drivers to provide synchronization
signals. Multiple sensor orders are shipped with the interconnect board in place and the drivers
are pinned together as one unit.
It is critical that each ECL202 be connected to the probe indicated on the “USE PROBE
S/N” label on the front of each ECL202.
X
3X
1.5X
No metallic
mounting hardware
in this area
1.5X X
3X
1.5X
X
CAUTION

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CONNECTING TO THE ECL202
Connection Description Notes
Top-Rear Connector: Remove Oset
No Connection
No Connection
Remote Oset + + Optoisolator input for
Remote Oset function 15-24 VDC Activates the
function
Remote Oset - – Optoisolator input for
Remote Oset function
Top-Front Connector: Remote Setpoint and Switch Output
Remote Threshold - – Optoisolator input for
Setpoint function 15-24 VDC Activates the
function
Remote Threshold + + Optoisolator input for
Setpoint function
Switch Contact 1 of switched output Open:
30 VAC/60 VDC max
Closed: 250 mA max
Switch Contact 2 of switched output
Remote Threshold -•
Remote Threshold +
Switch
Switch
No Connection
No Connection
Remote Offset +
Remote Offset •
Bandwidth Select Jumper
100Hz
1kHz
10kHz
15-24V 170mA Input
Power Ground
Output Signal Ground
Output Signal
Top Front
Bottom Front Bottom Rear
Top Rear
Eddy-Current Displacement Sensor
All connections SELV (Safety Extra Low Voltage)
(None=15kHz)

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Connection Description Notes
Bottom-Front Connector: Power and Analog Output
Power In Input Power Internally connected together
Power Ground Power Ground
Output Signal Ground Reference for output signal
voltage
Output Signal Output signal voltage 0-10 VDC
Bottom-Rear Connector: Bandwidth (ECL202 Only)
Bandwidth Selected Common point for bandwidth
selection jumper
100Hz, 1kHz, 10kHz
Bandwidth selection,
connected to Bandwidth
Selected
None = 15 kHz

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SPECIFICATIONS
Parameter Specication Notes
Power Requirement 15-24 VDC, 2.5 W
Resolution @
15kHz
(Typical)¹,²
nonferrous 0.006 to 0.008%F.S. (ECL202)
0.3 µm or higher (ECL202e) See calibration sheet
for
specics
ferrous 0.007 to 0.1%F.S. (ECL202)
0.3 µm or higher (ECL202e)
Linearity¹ ±0.2%F.S.
Error Band¹ ±0.4%F.S.
Analog Output¹ 0-10 VDC, 0 Ω, 15 mA max
Analog Output Update Rate 15 µS
Setpoint Switch Output
Solid state switch closure:
On state: 2.5 Ω, 250 mA max
O state: 30 VAC/60 VDC max
Remote Setpoint and Oset
Inputs 15-24 VDC to activate, 3-7 mA Optoisolator inputs
Driver Operating
Environment 4°C-50°C, IP40
Probe
Operating
Environment
Standard
Probes -25°C to +125°C, IP67
High Temp.
Probes -25°C to +200°C, IP63
¹Actual values depend on probe and range and are listed on the calibration certicate shipped
with the product. Contact Lion Precision for replacement certicates.
²In High EMI environments (10 V/m), output noise levels may rise to 30 mV causing resolution
to be reduced to 0.3%.

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Parameter Specication Notes
Temperature
Coecient Driver
Nonferrous
U3 Probe ±0.04% F.S./°C
Over 15°C to
50°C
temperature
range
U5 Probe ±0.1% F.S./°C
U8 Probe
±0.04% F.S./°C
U12 Probe
U18 Probe
U25 Probe
U38 Probe
U50 Probe
Ferrous
U3 Probe ±0.08% F.S./°C
U5 Probe ±0.1% F.S./°C
U8 Probe
±0.04% F.S./°C
U12 Probe
U18 Probe
U25 Probe
U38 Probe
U50 Probe
Temperature
Coecient
(Probe)
Nonferrous
U3 Probe ±0.04% F.S./°C
Over 15°C to
65°C
temperature
range
U5 Probe ±0.04% F.S./°C
U8 Probe ±0.02% F.S./°C
U12 Probe ±0.02% F.S./°C
U18 Probe
±0.01% F.S./°C
U25 Probe
U38 Probe
U50 Probe
Ferrous
U3 Probe
±0.04% F.S./°C
(15°C to 35°C)
±0.08% F.S./°C
U5 Probe ±0.01% F.S./°C
U8 Probe ±0.04% F.S./°C
U12 Probe ±0.03% F.S./°C
U18 Probe ±0.01% F.S./°C
U25 Probe ±0.01% F.S./°C
U38 Probe ±0.02% F.S./°C
U50 Probe ±0.01% F.S./°C

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MECHANICAL DETAIL
11.3mm
0.45"
4.38"
111 .2mm
3.90"
99.0mm
7.4mm
0.29"
4.47"
113 .6mm
0.89"
22.6mm
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