Sun Power AMETEK AVC Manuel utilisateur
Installation & Operation Manual
for the
Active Vibration Cancellation (AVC) System
Rev. –
December 15, 2014
2 Installation & Operation Manual for the
Active Vibration Cancellation (AVC) System
Table of Contents
Section 1, Equipment Description ..................................................................................................3
System Components.................................................................................................................................3
Specifications............................................................................................................................................3
Section 2, Installation.......................................................................................................................4
Install the AVC Balancer...........................................................................................................................4
Install the Accelerometer...........................................................................................................................5
Attach the Wiring Harnesses.....................................................................................................................6
AVC Controller & Over-Temp Thermistor..................................................................................................8
Section 3, Operation.......................................................................................................................10
Introduction.............................................................................................................................................10
Serial Port Configuration.........................................................................................................................10
Commands .............................................................................................................................................10
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Active Vibration Cancellation (AVC) System
Section 1
Equipment Description
System Components
The Sunpower Active Vibration Cancellation (AVC) system includes an AVC balancer, AVC controller, over-
temp thermistor cable, accelerometer cable, power wiring harness, and instrumentation wiring harness as shown
in figure 1.
Figure 1. Active Vibration Cancellation (AVC) System Components
Specifications
Mass (cryocooler with AVC balancer attached)
MT: 2.6 kg
CT: 3.5 kg
GT: 3.5 kg
Length (cryocooler with AVC balancer attached)
MT: 275 mm
CT: 305 mm
GT: 325 mm
4 Installation & Operation Manual for the
Active Vibration Cancellation (AVC) System
Section 2
Installation
Install the AVC Balancer
If a passive balancer is attached to the cryocooler, remove the bolt from the middle of the passive balancer and
remove the passive balancer from the cryocooler. Now install the AVC balancer as follows:
1. Unscrew and remove the hex standoff from the balancer (figure 2).
2. Screw the hex standoff onto the cryocooler end plate.
3. Place the balancer onto the hex standoff, insert the long bolt through the middle of the balancer and into the
hex standoff, and tighten the bolt. (Figure 3 shows the AVC balancer attached to a cryocooler.)
Figure 2. AVC Balancer
Figure 3. AVC Balancer Installed on a CryoTel CT Cryocooler
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Active Vibration Cancellation (AVC) System
Install the Accelerometer
Attach the AVC accelerometer (figure 4) (Sunpower part number 300AD-99678-108-015) to the end plate of the
CryoTel cryocooler with the provided #5-40 bolt into the end plate of the cryocooler (figure 5). If the cryocooler
is an older model not equipped with a #5-40 threaded hole, then use a small amount of super glue to attach the
accelerometer onto the end plate in the location shown in figure 5.
Figure 4. AVC Accelerometer Cable
Figure 5. AVC Accelerometer Installed with a Screw onto a Cryocooler
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Active Vibration Cancellation (AVC) System
Attach the Wiring Harnesses
The components of the AVC system are interconnected with the cryocooler and with other interfacing equipment
using the two supplied wiring harnesses: the power wiring harness, and the instrumentation wiring harness.
Power Wiring Harness
The power wiring harness (figure 6) has four connections:
•DC Power Supply Leads –A black lead and a red lead that connect to the DC power supply [not included]
for the cooler.
•AVC Controller Power Wiring Harness Connector –A D-sub connector with various pin sizes that connects
to the power wiring harness connector on the AVC controller.
•Cryocooler Power Connector –A two-pin connector that mounts to the back plate of the cryocooler and
connects to the two feedthrough pins used to power the cryocooler.
•AVC Balancer Power Connector –A small, two-conductor white plastic connector that connects to the pow-
er connector on the AVC balancer’s power cable (figure 2).
Figure 6. Power Wiring Harness
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Active Vibration Cancellation (AVC) System
Instrumentation Wiring Harness
The instrumentation wiring harness (figure 7) has five connections:
•Computer Connector –A molded plastic, 9-pin, female RS-232 serial communications connector that con-
nects to an RS-232 serial port on a computer for relaying control commands and replies.
•AVC Controller Instrumentation Wiring Harness Connector –A molded plastic 37-pin D-sub connector
that connects to the instrumentation wiring harness connector on the AVC controller.
•Over-Temp Thermistor Connector –A small, black, two-pin plastic connector that connects to the plastic
connector on the over-temp thermistor cable.
•Accelerometer Connector –A small, black, three-pin plastic connector that connects to the plastic connector
on the accelerometer cable.
•RTD Leads –Four leads that connect to the Resistance Temperature Detector (RTD) wire supplied with the
cryocooler. The RTD wire is attached to an RTD which is attached to the thermal load or to the cryocooler’s
cold tip as described in the cryocooler installation and operation manual.
Figure 7. Instrumentation Wiring Harness
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Active Vibration Cancellation (AVC) System
AVC Controller & Over-Temp Thermistor
The AVC controller (figure 8) drives the AVC balancer as well as the cryocooler. A feature of the AVC controller
that is not among the features of the standard CryoTel controllers is the reject over-temperature alarm. A provided
thermistor (figure 9) is attached to the cooling fins via the available threaded hole (or near the water jacket via
thermal epoxy in the case of water cooled systems [figure 10]). If the thermistor reaches 70 °C during operation,
the controller will cut off power to the cryocooler until the temperature drops below 70 °C.
Figure 8. AVC Controller
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Active Vibration Cancellation (AVC) System
Figure 9. Over-Temp Thermistor Cable
Figure 10. Thermistor Attached to the Cryocooler with Epoxy
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Active Vibration Cancellation (AVC) System
Section 3
Operation
Introduction
This section lists all the commands available for use with an AVC controller over the RS-232 interface and re-
places the command reference section of the cryocooler user manual.
Serial Port Configuration
Baud Rate .......... 9600
Data Bit............... 8
Parity .................. none
Stop Bits............. 1
Flow Control....... none
Commands
The following subsections describe the terminal emulator commands and provide examples of what is displayed
on the computer screen as you enter the command and receive a reply. All of the parameters set using these com-
mands will be retained in memory when the controller is power cycled unless otherwise noted.
1) Display the current control status of the controller
a) Command: COOLER<CR>
b) This command displays the current control status of the controller.
Control Modes:
OFF –The cryocooler is OFF or being powered down and turned OFF.
ON –The cryocooler is running in temperature control mode and will attempt to maintain the temperature set using
the TTARGET command.
POWER –The cryocooler is running in power control mode and will maintain the commanded power set using the
PWOUT command.
2) Set the control mode of the controller
a) Command: COOLER=<VAL><CR>
b) This command is User locked.
c) This command sets the control mode of the controller.
Control Modes:
OFF –The cryocooler ramp down and powered OFF.
ON –The cryocooler is running in temperature control mode and will attempt to maintain the temperature set using
the TTARGET command.
POWER –The cryocooler is running in power control mode and will maintain the commanded power set using the
PWOUT command.
COOLER
ON
COOLER=OFF
OFF
Table des matières
