background image

A magnet quench protection circuit is incorporated to rapidly reduce the power
supply output voltage to zero in the event a magnet quench is detected.  The
function is defeatable from the front panel.

II. SPECIFICATIONS

Input power  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115 or 230 Vac, 50-60 Hz
Ramp  output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0  to  5  VDC
Charging  rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0  to  10  Amps/sec
Charging  rate  ranges . . . . . . . . . . . . . . . . . . . . . 0.1, 1 and 10 Amps/sec
Charging  rate  adjustment  . . . . . . . . . . . . . . . . 10  turn  potentiometer
Current  limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10  turn  potentiometer
Current  control . . . . . . . . . . . . . . . . . . . . . . . . . . . Up/Pause/Down  switch

 

Voltage  limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10  turn  potentiometer

III. INSTALLATION

WARNING:

Before energizing the instrument, the earth

ground of the power receptacle must be verified to be at earth
potential and able to carry the rated current of the power circuit.
Using extension cords should be avoided. If one must be used,
however, ensure the ground conductor is intact and capable of
carrying the rated current.

In the event that the ground path of the instrument becomes less

than sufficient to carry the rated current of the power circuit, the
instrument should be disconnected from power, labeled as unsafe,
and removed from place of operation.

This document contains operating instructions as well as

calibration instructions.  The calibration procedure is to be
performed only by trained service personnel familiar with electrical
safety precautions and proper energized electrical safety
procedures.  Do not perform any operations on any AMI equipment
with the cover removed unless qualified to do so and another
person qualified in first aid and CPR is present.

Do not operate this instrument in the presence of flammable

gases.  Doing so could result in a life-threatening explosion.

WARNING:

Do not modify this instrument in any way.  If

component replacement is required, return the instrument to AMI
facilities as described in section IX of the manual.

Page 2

Содержание 410

Страница 1: ...buy your excess underutilized and idle equipment along with credit for buybacks and trade ins Custom engineering so your equipment works exactly as you specify Critical and expedited services Leasing Rentals Demos In stock Ready to ship TAR certified secure asset solutions Expert team I Trust guarantee I 100 satisfaction All trademarks brand names and brands appearing herein are the property of th...

Страница 2: ...n time or in some non linear way as a function of time Attempting to inject the desired function into the current control terminals of an ordinary power supply usually results in a current oscillation in the magnet due to the interaction of the large inductance zero resistance magnet with the power supply Alternatively since the voltage across a superconducting coil is V L dI dt one can also contr...

Страница 3: ...tor is intact and capable of carrying the rated current In the event that the ground path of the instrument becomes less than sufficient to carry the rated current of the power circuit the instrument should be disconnected from power labeled as unsafe and removed from place of operation This document contains operating instructions as well as calibration instructions The calibration procedure is t...

Страница 4: ......

Страница 5: ......

Страница 6: ...p for the programmer and therefore the noise and stability of the system is a function of the quality of the power supply The ideal power supply has zero phase shift a voltage control mode where 1 volt input produces 1 volt output has zero current ripple and would be much slower than the programmer time constant 0 1 millisecond typically Some switching power supplies may be too noisy for this appl...

Страница 7: ... black to blue 9 Locate the leads marked PROGRAM OUT and COMMON from the power supply Connect these into the appropriately marked plugs on the rear panel of the programmer NOTE If using a Hewlett Packard power supply with the programmer ensure the COMMON lead contains a 750Ω resistor in series with the lead Refer to the power supply manual 10 Locate the magnet voltage tap leads blue and yellow and...

Страница 8: ......

Страница 9: ...REFER TO POWER SUPPLY OPERATIONS MANUAL FOR PROPER POWER SUPPLY STRAPPING FOR REMOTE PROGRAMMING BY EXTERNAL VOLTAGE VOLTAGE MODE Page 8 ...

Страница 10: ......

Страница 11: ......

Страница 12: ......

Страница 13: ...energizes the programmer In the POWER position the programmer is energized and the green POWER LED should be lit 2 Charge Rate The RAMP RATE AMPS SECOND will select a 0 1 1 or 10 amperes second charge rate The VARIABLE ramp rate is a ten turn potentiometer that divides the selected range into sub increments i e 1 amp sec is controlled from 0 1 to 1 amp sec 3 Up Down Pause switch The magnet current...

Страница 14: ...y output to zero This circuit can be reset by placing the switch in the OFF RESET position momentarily and then returned to the QUENCH DETECTION position This protection feature can be disabled if magnet voltage transients cause the protection circuit to operate when the magnet has not quenched To disable this feature put the switch in the down position Persistent Switch Heater The heater is contr...

Страница 15: ...operated PERSISTENCE SWITCH HEATER switch is OFF c Set the VARIABLE ramp rate potentiometer on 10 and the current control switch in the DOWN position d Set the CURRENT LIMIT potentiometer to the rated current as indicated on you AMI magnet data sheet e Turn on power to the magnet programmer f Turn on power to the power supply g Place the CURRENT CONTROL switch to the UP position The current indica...

Страница 16: ... Rate Range Ramp Rate Current Limit and Up Down Pause can be changed at any time Care should be exercised not to set the current limit or ramp rate to higher values than can be tolerated by the magnet i To change the current setting and field place the ramp up down switch in the PAUSE position Set the rate range switch and rate dial to the charge rate desired and the current limit to the desired p...

Страница 17: ...alues for the ramp rate and current limit In this mode the external Up Down Pause switch is inoperative because it has been disconnected internally and placed in the up mode This means that the magnet current always ramps up or down to the value corresponding to the voltage signal from the computer An opto isolator signal is available from the programmer pins 5 18 which can be read to indicate whe...

Страница 18: ...during magnet discharge means the current is decaying and the magnet is not in the persistent mode In this case ramp the current back to the desired value and try again e To return to the programmed control mode of operation ensure the current limit is set to the value recorded when you switched into the persistent mode NOTE The best method is to not have moved the current limit setting after swit...

Страница 19: ...410 412 contains high voltages capable of producing life threatening electrical shock Do not perform any operations on any AMI equipment with the cover removed unless qualified to do so and another person qualified in first aid and CPR is present 1 Deenergize the instrument by disconnecting the power plug from the power receptacle 2 Disconnect the programmer from any power supplies 3 Remove the in...

Страница 20: ...en TP5 and common Adjust the VOLTage LIMIT pot P11 to obtain 10 000 volts 21 Connect the voltmeter between TP3 and common Adjust the output voltage PROGRAM OUT pot P6 to obtain 10 000 volts if the programmer is in a system with a HP 6260B power supply If the programmer is in a system with a switching power supply adjust P6 to obtain 5 000 volts NOTE Refer to the power supply manual for the proper ...

Страница 21: ...lead of the voltmeter to the right side of C9 or C10 This is the side of the integrating capacitors near U12 U13 38 Adjust the DRIFT potentiometer P9 until the voltmeter reads 0 000 volts 39 Disconnect the voltmeter 40 Move jumper W4 to W3 on the PCB 41 Replace jumpers W5 and W6 on the PCB 42 Perform the following if the system is controlled by computer via a MAXUS interface a Connect the MAXUS AI...

Страница 22: ...front panel current meter reads 100 0 Amps l Repeat steps a through l until no further adjustments are necessary m Place the front panel COMPUTER MANUAL switch in the MANUAL position 43 Place the front panel CURRENT CONTROL switch in the UP position 44 At maximum current adjust CURRENT LIMIT potentiometer P12 until the millivoltmeter reads 100 0 mV 45 Deenergize the system and reinstall the cover ...

Страница 23: ...ratic Operation a Ensure all wires are connected to the proper connectors b Ensure the magnet power supply is in the voltage programming mode c Non linear magnet ramping can be caused by attempting to exceed the positive or negative voltage available for the magnet from the power supply The voltage limit function will also result in non linearities d Ensure the local controls on the power supply a...

Страница 24: ...t fully counter clockwise It is now necessary to re adjust the CURRENT LIMIT trimmer P12 on the circuit board to ensure that a setting of 10 0 on the CURRENT LIMIT dial on the face of the instrument or an input voltage of 5 0 volts from the computer control system will produce exactly 100 amperes 5 Unable to enter persistent mode operation The switching power supply produces a higher noise level t...

Страница 25: ...th respect to its products Since however AMI does not have control over the installation conditions or the use to which its products are put no warranty can be made of fitness for a particular purpose and AMI cannot be liable for special or consequential damages All warranty repairs are F O B Oak Ridge Tennessee USA IX RETURN AUTHORIZATION Items to be returned to AMI for repair warranty of otherwi...

Страница 26: ...quipment Have surplus equipment taking up shelf space We ll give it a new home Learn more Visit us at artisantg com for more info on price quotes drivers technical specifications manuals and documentation Artisan Scientific Corporation dba Artisan Technology Group is not an affiliate representative or authorized distributor for any manufacturer listed herein We re here to make your life easier How...

Отзывы: