PSC-2460 CURRENT POWER SUPPLY CALIBRATION
The current scale factor is factory set; however, it may be desirable to change the scale factor or re-calibrate if the settings have been misadjusted. Required will be a brake, two voltmeters, a small screwdriver, and a potentiometer (pot) or 0-10 VDC power supply.
Connect all components electrically before powering on the system. See Schematic 1 for reference.
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Couple the brake (C- & C+) to terminals 7 & 8 on the green 8-pin terminal connector.
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Connect the first voltmeter to “CUR CMD” and “GND.”
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Connect the second voltmeter to “I COIL” and “GND.”
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Connect a potentiometer (or DC voltage source) to CMD+ and CMD- to terminals 1 & 2 on the 8-pin terminal connector.
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Connect the power supply, PS1, to a 115 VAC wall outlet.
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With the CUR CMD set to zero, turn the “OFFSET” pot, R1 (labeled “O”) until Voltmeter #2 reads zero.
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Set the potentiometer so that Voltmeter #1 (CUR CMD) reads 10 VDC.
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Set the “GAIN” pot, R1 (labeled “G”), to the desired current. NOTE: the current is measured across a 0.1-ohm resistor which means that for 1.0 amps commanded to the brake, the voltmeter should read 0.1 VDC.
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Verify that setting the CUR CMD to zero still provides zero amps to the brake. For good measure, check a few voltage settings between the minimum and maximum CUR CMD values and verify that the current output is linear.
