Beck, R&J Automobile Parts 14-10 Benutzerhandbuch

27

 

Adjustment of the CPS-2 is necessary if the 

signal range requires an increase or decrease in 
value relative to the drive’s output shaft stroke.  
Calibrate by turning the Span Potentiometer CW 
to increase the gain of the CPS-2.  This has the 
effect of increasing the output at the high end and 
lowering the output at the low end equally.
 

Signal Span is determined by the CPS-2 

model and ranging resistor selected.

 

To adjust the span, turn the Span Potentiometer 

on the CPS-2 circuit board.  The Span
Potentiometer adjusts the CPS-2 so that the 
drive output shaft motion produces the specified 
output signal range.
 

 Tools required for calibration: 

      mA / V dc Multimeter 
  

 3/32” 

Screwdriver 

      7/64” Hex Wrench 
      5/16” Open End Wrench
       1/2” Combination Wrench 
      15/16” Combination Wrench
      1/32” Thickness Feeler Gauge 
      200 ohm Resistor
 1.  Put electric Handswitch in STOP position.
 2. Open the terminal block cover (1/2” bolt 

heads) and top cover (15/16” bolt head).  The 
O-ring seal will remain in the rim of the top 
cover when removed.

 3. Determine the correct feedback terminals 

from the wiring diagram supplied with your 
drive (CC, DD, EE).

 4. Install a mA meter in series with a 200 ohm 

load resistor for current outputs or a voltmeter 
across the CPS-2 output terminals for voltage 
outputs (see Table 11, page 46).

 5. Move the drive to the fully extended position 

and record the signal voltage or current.

 6. Move the drive to the fully retracted position 

and record the signal voltage or current. 

 7.  Subtract the two signal readings and compare 

to the desired output signal span.  For 
example, 16 mA for 4–20 mA signal range.  
Divide the difference between the measured 
and desired span by 2.  Adjust the Span 
Potentiometer by this amount with the drive 
at the 100% position.  CW movement of the 
Potentiometer increases the span equally at 

 

These models are equipped with a Contactless 

Position Sensor (CPS-2) for position sensing 
and feedback.  On model 14-_08, the CPS-2 
also delivers a feedback signal to the Electronic 
Signal Receiver (ESR-4).  Adjusting the remote 
feedback signal also automatically adjusts the 
ESR-4 signal.
 

CPS-2 units are designed to provide position 

feedback without contacting or wiping surfaces.  
On option 8 units, the CPS-2 includes a Monitor / 
Isolator board which detects high and low out-of-
limit conditions.  The Monitor function monitors 
the CPS-2 position signal and compares it to 
established limits.  If the output exceeds normal 
signal conditions, the monitor relay contact 
opens.  This relay may be used for a remote 
signal indication or activation of Loss-of-Signal 
operation.
 

The CPS-2 provides infinite resolution by 

means of a ferrite rotor on the control shaft and 
a ferrite stator on the CPS-2 board.  To make 
feedback signal adjustments, adjust the span, 
then change the position of the rotor on the 
control shaft to adjust the zero.

 

To check CPS-2 calibration:

  

Tools 

required: 

      mA / V dc Multimeter
      1/2” Combination Wrench
      15/16” Combination Wrench
      200 ohm Resistor
 1.  Put electric Handswitch in STOP position.
 2. Open the terminal block cover (1/2” bolt 

heads) and top cover (15/16” bolt head).

 3. Determine the correct feedback terminals 

from the wiring diagram supplied with your 
drive (CC, DD, EE).

 4. Install a mA meter in series with a 200 ohm 

load resistor for current outputs, or a voltmeter 
across the CPS-2 output terminals for voltage 
outputs (see Table 11, page 46).

 5. Drive the output shaft through its full range 

and check the feedback signal.

 

When properly adjusted, the feedback signal 

should be maximum with the drive’s output shaft in 
the fully retracted (maximum input signal) position.  
At 50% travel, the signal should be mid-span.  At 
full extension, the signal should be minimum.  If not 
correct, proceed with the calibration procedure.