Safe Sound Audio P501 User's Guide download pdf (Page 19)

Calibration

Current input signal calibration

The following minimum and maximum values should be known:

omax

- Maximum voltage output signal

omin

- Minimum voltage input signal

imax

- Maximum current input signal

imin

- Minimum current input signal

imin

and I

imax

is the current applied through terminals 8 and 9 (COM and INPUT

1). V

omin

and V

omax

is the voltage applied across terminals 1 and 2 (OUT1 and

OUT2).

Calibration procedure:

Use a voltmeter and ammeter for voltage and current measurements, respectively.

1. Switch only one of the SW501 DIP switches to the ON position (Figure 9, pg

12):

DIP switch 1 ON for 1–5 mA,

DIP switch 2 ON for 4–20 mA, or

DIP switch 3 ON for 10–50 mA.

2. Connect (but do not power) the current input signal as follows:

a. Connect the signal negative (–) to COM (terminal 7).

b. Connect the signal positive (+) to INPUT 1 (terminal 8).

3. Adjust the regenerative drive’s MIN SPD trimpot full CCW and the MAX SPD

trimpot full CW.

4. Apply both the AC line voltage and the current input signal.

5. Set the current input signal to I

imin

6. Adjust the MIN OUT trimmer potentiometer (P503) so that the output voltage is

omin

7. Set the current input signal to I

imax

8. Calculate the test point voltage, V

ATTENTION: The control circuit is at line potential when the drive is

energized. Use a non-metallic screwdriver when making adjustments to the

circuit board potentiometers. Exercise extreme caution as hazardous voltage

exists. Failure to observe these precautions could result in severe bodily injury

of loss of life.

ATTENTION: The DC3 drive is intended to operate at a predetermined

minimum speed. If the application requires zero speed operation, the user is

responsible for assuring safe conditions for operating personnel by providing

suitable guards, audio or visual alarms, or other devices. Failure to observe

these precautions could result in bodily injury.

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Safe Sound Audio P501 User's Guide Page 19

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