Wilcoxon PA10A Manuale utente

wilcoxon.com | 301 330 8811

POWER AMPLIFIER

PRODUCT MANUAL | MODEL PA10A

Model PA10A | Wilcoxon Sensing Technologies

April 2022 | MAN-0350 rev A

POWER AMPLIFIER

PA10A

PRODUCT SUPPORT

For answers to questions about the PA10A power amplifier, consult this manual. For additional product support, contact

Wilcoxon Sensing Technologies at 301-330-8811, 9 a.m. to 5 p.m. EST. If it is more convenient, email

[email protected].

8435 Progress Dr.

Frederick, MD 21701 USA

Phone: 301-330-8811

www.wilcoxon.com

[email protected]

Model PA10A | Wilcoxon Sensing Technologies

Page 3

SAFETY CONDITIONS

PACKAGE CONTENTS:

PA10A Power Amplifier

Power cable

4 × spare fuse (2 × 5 A for 115 V, 2 × 3 A for 230 V)

2 × Rack-mount ear

4 × Self-adhesive rubber foot

Please inspect and retain all packing materials.

Contact Wilcoxon Sensing Technologies for additional accessories.

TO REDUCE THE RISK OF ELECTRIC SHOCK, ALWAYS CONNECT THE AMPLIFIER TO AN

EARTH-GROUNDED SOCKET (THREE-PIN SOCKET), USING THE MATCHING POWER

CABLE.

LETHAL VOLTAGES ARE PRESENT WITHIN THE CHASSIS. DO NOT REMOVE ANY PANELS

OR ATTEMPT TO SERVICE THE INSIDE OF THE AMPLIFIER. THE AMPLIFIER CONTAINS NO

USER-SERVICEABLE PARTS INSIDE. UNAUTHORIZED SERVICE WILL VOID THE

WARRANTY.

WHEN CHANGING THE FUSE, ALWAYS USE A NEW FUSE OF THE CORRECT RATING THAT

IS SHOWN ON THE REAR PANEL, AND MAKE SURE THE MAINS VOLTAGE IS CORRECTLY

SET.

ALWAYS USE THE AMPLIFIER INDOORS. DO NOT USE THE AMPLIFIER OUTSIDE OF ITS

SPECIFICATION. DO NOT TOUCH ANY TERMINAL OR CONNECTOR WHEN THE AMPLIFIER

IS OPERATING. ALWAYS TURN OFF THE AMPLIFIER AND WAIT FOR AT LEAST TWO

MINUTES BEFORE CONNECTING OR DISCONNECTING WIRES AND CABLES.

DO NOT SUBJECT THE AMPLIFIER TO DIRT AND MOISTURE. PACK THE AMPLIFIER IN ITS

ORIGINAL PACKAGING WHEN SHIPPING.

Model PA10A | Wilcoxon Sensing Technologies

Page 4

TABLE OF CONTENTS

1. INTRODUCTION.........................................................................................................5

2. OVERVIEW.................................................................................................................6

2.1 FRONT PANEL FEATURES......................................................................................................6

2.2 REAR PANEL FEATURES........................................................................................................7

2.3 GAIN KNOB ...............................................................................................................................7

2.4 LCD DISPLAY BUTTONS .........................................................................................................8

2.5 LED STATUS INDICATOR........................................................................................................8

3. INSTALLATION...........................................................................................................9

3.1 LOCATION CONSIDERATIONS ...............................................................................................9

3.2 RACK-MOUNTING THE AMPLIFIER........................................................................................9

3.3 FUSE CHANGE AND VOLTAGE CONVERSION...................................................................10

3.4 THE POWER AMPLIFIER, MATCHING NETWORK, AND SHAKER CABLES......................11

4. OPERATION.............................................................................................................13

4.1 POWERING UP.......................................................................................................................13

4.2 POWERING DOWN.................................................................................................................13

4.3 CHANGING DISPLAY MODES...............................................................................................14

4.4 MUTING TEMPORARILY........................................................................................................14

4.5 ADJUSTING SETTINGS..........................................................................................................15

4.6 HANDLING OUTPUT CLIPPING.............................................................................................17

4.7 HANDLING ERROR CONDITIONS.........................................................................................17

5. EXAMPLE USES FOR SMART FEATURES ............................................................18

5.1 EMERGENCY SHUT-OFF BUTTON.......................................................................................18

5.2 TEMPERATURE CONTROLLED AUTO SHUTOFF...............................................................18

6. TECHNICAL SPECIFICATIONS...............................................................................19

7. TROUBLESHOOTING GUIDE..................................................................................25

Model PA10A | Wilcoxon Sensing Technologies

Page 5

1. INTRODUCTION

Congratulations on your purchase of a PA10A power amplifier! This manual covers important information related to the

use and operation of the PA10A power amplifier. Please review this manual carefully as it contains important

information regarding the safe and proper operation of the amplifier.

The PA10A power amplifier is a high-quality, air-cooled, solid-state power amplifier designed for small vibration systems

(shakers). Standard features include clipping-detection; over-temperature and over-current protection; voltage, current,

and power displays; and a variety of fault-condition inputs.

Designed for standard 19-inchrack-mounted installations, thisClass D amplifieris extremely energy-efficient. It requires

significantly less energy input for the same power output by greatly reducing wasted heat dissipation. This green

innovation allows for energy savings, environmental responsibility, and cool, quiet, high-performance operation.

Although this amplifier has been designed to directly drive low impedance loads typical of vibration transducers, it can

be used in any application requiring continuous-duty, high-quality, audio-frequency power amplifiers.

Phone: 301-330-8811 (9 a.m. to 5 p.m. EST)

Fax: 301-330-8873

E-mail: [email protected]

Model PA10A | Wilcoxon Sensing Technologies

Page 6

2. OVERVIEW

The PA10A power amplifier has been designed for easy operation via front panel controls. External input and output

connections are found on the rear panel. Internal over-temperature and over-current protection assure continuous

operation at full rated power without concern for damage to the amplifier.

2.1 Front Panel Features

Table 0-1

Item

Description

See Also

1. Gain knob

Used for amplifier mute/gain adjustment

“Gain Knob”,

page 7

2. LCD display

The liquid crystal display (LCD) displays status,

menus, and button functions

“LCD Display

/ Buttons”,

page 8

3. Buttons F1 –F4

Used for navigating among screens and menus and

adjusting settings

“LCD Display

/ Buttons”,

page 8

4. LED status indicator

Displays the current amplifier status

“LED Status

Indicator”,

page 8

1. Gain knob

2. LCD display

3. Buttons F1 –F4

4. Status LED indicator

Model PA10A | Wilcoxon Sensing Technologies

Page 7

2.2 Rear Panel Features

Table 0-2

Item

Description

1. Signal input

BNC input to the amplifier

2. Aux 2

Analog auxiliary fault-condition input

3. Aux 1

Digital auxiliary fault-condition input

4. Interlock -

Ground connection for interlock and Aux 1 inputs

5. Interlock +

Digital interlock fault-condition input

6. Earth ground

Earth ground connection for safety and shielding

7. Signal + output

Positive output of the amplifier

8. Signal - output

Negative output of the amplifier

9. Power socket

115V or 230V, 48Hz-62Hz power input (IEC-60320 C14 type inlet)

10. Power switch

Rocker switch for turning power on or off

11. Fuse holder

Removable fuse holder for replacing fuse or converting between 115V

and 230V operation. See 3.3 for “Fuse Change and Voltage

Conversion”

12. Fan

40mm silent fan, automatically controlled

2.3 Gain Knob

The gain knob on the front panel of the amplifier functions as both a mute/unmute switch and a gain level control.When

the knob is pointing downward (position 1 in the figure), the switch is in the “mute” position. To switch it to the “unmute”

position, rotate the knob clockwise until a click is heard/felt. At this point (position 2) the gain is 0. To increase the gain,

keep rotating the knob clockwise. To decrease the gain, rotate the knob counterclockwise. To switch back to the “mute”

position, rotate the knob counterclockwise until the click.

1. Signal input

2. Aux 2

3. Aux 1

4. Interlock -

5. Interlock +

6. Earth ground

7. Signal + output

8. Signal - output

10. Power switch

11. Fuse holder

9. Power socket

12. Fan

Model PA10A | Wilcoxon Sensing Technologies

Page 8

2.4 LCD Display Buttons

The PA10A power amplifier has an intuitive user interface. For all user-interactive screens, the top line of the LCD will

display the relevant status or information, while the bottom line of the LCD will display the functions of the buttons “F1”

through “F4” for that screen. This makes the user interface very easy to use.

For example, the figure to the left shows the LCD display for the

interlock settings menu. The top line shows that the menu item

“Auto” is currently selected. The bottom line indicates the functions

of the buttons F1 through F4 for this menu. In this case, F1 button

( ) exits the menu without changing anything; F2 button has no

function; F3 button ( ) selects the next item in the menu, and F4

button ( ) accepts the menu choice, which in this case changes

the interlock setting to “Auto”.

2.5 LED Status Indicator

The front panel of the amplifier features a dual-color LED status indicator for displaying the current system status. The

following table shows the LED indication and the corresponding status.

Table 0-3

LED indication

System status

Off (unlit)

Off /muted, gain knob turned to “mute” position

Green (solid)

On /unmuted, amplifier running properly

Green (flashing)

Temporarily muted (see “Muting Temporarily”, page 14)

Orange/green (flashing)

Output is clipping (see “Handling Output Clipping”, page 17)

Red (solid)

Error condition (see “Handling Error Conditions”, page 17)

Model PA10A | Wilcoxon Sensing Technologies

Page 9

3. INSTALLATION

WARNING: Lethal voltages are present within the chassis.

A three-conductor earth-grounded power cable has been supplied with this unit. To ensure proper

grounding of the chassis, use only power cables of this type.

The amplifier should never be operated without proper earth-grounding or with either of its covers removed.

3.1 Location Considerations

The PA10A power amplifier is designed to be used on a standalone workbench or mounted on a standard 19-inch, 2U

instrumentation rack (480 mm × 88.9 mm [19 in. × 3.5 in]).

When used on a workbench, the amplifier package includes four self-adhesive rubber feet that can be installed in the

four corners of the bottom panel to prevent the chassis from skidding on the workbench surface.

When used on an instrumentation rack, the amplifier package includes two rack-mount ears to be attached to the

amplifier (see “Rack-mounting the Amplifier” below).

The amplifier should be located so that the controls and indicators are easily accessible and visible to the operator.

Adequate space (a minimum of 15 cm [6 in]) in the front and rear is required. Keep the chassis ventilated to facilitate

necessary air cooling. Extremely dusty or humid locations should be avoided to maintain proper functioning of internal

cooling surfaces.

3.2 Rack-mounting the Amplifier

Step 1 Turn off the amplifier and remove all cables.

Step 2 Using a Phillips head screwdriver, remove the two front screws on the right side of the amplifier. Loosen,

but do not remove, a third screw to the right and a fourth screw on the bottom. (Figure 3-1)

Step 3 Step 3:Align one of the included rack-mount ears with the two holes, and secure the rack-mount ear with

the two screws. Retighten the other two screws. (Figure 3-2)

Step 4 Step 4:Repeat Step 2 and Step 3 for the left side of the amplifier.

Figure 0-2

Figure 0-1

Model PA10A | Wilcoxon Sensing Technologies

Page 10

Step 5 Step 5:Mount the amplifier on the instrumentation rack. Secure the amplifier with separate screws.

3.3 Fuse Change and Voltage Conversion

Follow these steps when replacing a blown fuse or when converting between 115 VAC input and 230 VAC input. Spare

fuses for both voltages are included in the amplifier package.

Step 1 Step 1:Turn off the amplifier and remove any power cable.

Step 2 Insert a small flathead screwdriver in the slot located at the top of the power module. Rotate the

screwdriver to loosen the fuse cover (Figure 3-3). Open the fuse cover.

Step 3 Step 3:Insert the screwdriver in the slot on the top of the fuse holder. Push back the screwdriver to remove

the fuse holder (Figure 3-4).

Step 4 When changing fuse: Replace the fuse on both sides of the fuse holder with a new 3AG fuse of the same

rating (5A 250V for 115VAC or 3.0A 250V for 230VAC) (Figure 3-5).

Figure 0-4

Figure 0-3

Figure 0-5

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