BOC Edwards CV-6SL User manual

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CV - 6SL
INSTRUCTION MANUAL
6000W
POWER SUPPLY

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TABLE OF CONTENTS
1.0 Specification 5
2.0 Installation 7
2.1 Rack Mounted 7
2.2 Cooling 7
2.3 Filament Module 8
2.4 Electrical Power Input 8
2.5 Grounds 8
2.6 Power Supply to Filament Module 9
2.7 Filament Transformer Connection 9
2.8 Power Supply Control Connectors 9
2.9 Remote I/O Control 10
2.10 Remote Interface 12
2.11 RemoteWiring 15
2.11.1 Gun Control 15
2.11.2 High Voltage Control 16
2.11.3 Customer EPO 17
3.0 Controls and Operation 17
3.1 High Voltage Controls 18
3.2 High Voltage Interlock Chain 18
3.3 High Voltage Ready 19
3.4 High Voltage On 19
3.5 High Voltage Power Supply Meter 19
3.6 Remote Operation "High Voltage" 22
3.7 Gun Controls 21

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TABLE OF CONTENTS CONTINUED
3.8 Gun Operation Using Control Panel 21
3.8.1 Gun Interlocks 21
3.8.2 GunReady 22
3.8.3 GunOn 22
3.8.4 Gun Supply Metering 22
3.8.5 Gun Control Indicators 23
3.8.6 Remote Operation "Gun Supply" 23
3.8.7 Gun "Position" Control 24
3.8.8 Bias Control 24
3.8.9 Emission Current Control 24
4.0 Theory Of Operation 25
4.1 Overall 25
4.2 Control "High Voltage" 28
4.3 Control "Gun" 30
4.4 Power Supply Chassis 31
4.5 High Voltage Regulator 33
4.6 High Voltage Power Card 36
4.7 GunSupply 36
4.8 High Voltage Circuit 37
4.9 Filament Transformer Module 39
5.0 Trouble Shooting 39
5.1 Equipment 39
5.2 TurnOn 40
5.3 Regulator Card Adjustments 41
5.4 CardTests 41
6.0 DrawingList 42
7.0 Parts List 44

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1.0 SPECIFICATION
1.1 INPUT POWER
Model CV-6SL 208V
Input Voltage : 280V±10%
Frequency : 50/60Hz
Phase : Three - 4 Wire
Current : 32 Amps
Model CV-6SL 400V
Input Voltage : 400V±10% For operation from 0ºC to 40ºC. Input as low as 342 VAC may be
accommodated but unit must be operated at less than 35ºC due to reduced fan
speed.
Frequency : 50/60Hz
Phase : Three - 5 Wire
Current : 20 Amps
1.2 Output "High Voltage"
Voltage : 0-10,000V DC (Negative Polarity)
Current : 0-600 Milliamperes DC
Regulation : 0.5% (+/- 50 Volts)
Ripple : 0.5% RMS (140V P-P)
1.3 Output "Filament"
Voltage : 0-10V AC RMS
Current : 0-75 Amperes
Frequency : 34 kHz or Higher
Regulation : +1.0% (0.75 Amps)
1.4 Power Supply Front Panel
Meter
: Digital 3.5 Digits LCD
: Accuracy + 2%
: Select kV "10.00"kV
: Select mA "600" mA
Switch
: Select Filament “75.0”A
: Meter Select kV - mA
Potentiometers : Bias (0-75A) (Screwdriver) 10 Turn

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Indicators
: KV Overvoltage Fault
: KV Overcurrent Fault
: KV Out of Reg
: ARC Counter Fault
: Rail Fault
: Step Start Fault
: PWR OK
: HV ON
: Gun ON
: PS Fault
1.5 Main Circuit Breaker
: Emergency Off (mechanical latch)

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1.6 Mechanical
Power Supply
: Panel 8.75" High X 19" Wide
: Chassis 21" Deep
: Weight 42 Pounds
One Gun Filament Module D-2-855-2511
: Base 6 ½" X 11 ¼"
: Height 4"
: Weight 5 Pounds
1.7 Interconnect
Power Supply to Filament Transformer Module (3 Cables)
: B-2-371-247 (W-103B) 12 Feet
: B-2-371-248 (W-104A) 12 Feet
: B-2-371-283 (W-105B) 12.5 Feet
Filament to Chamber
: 3 Feet
: D-2-371-224 (W-111)
2.0 INSTALLATION
2.1 Rack Mounted
The power supply can be rack mounted in a standard 19" rack cabinet. It must be supported by two
side shelf supports to hold the power supply weight. Caution should be used as the supports should
not block the power supply side air input and exit.
The rack vertical height required is 8 3/4 inches. The chassis depth is 21". An additional 3" is
required for clearance of terminals, plugs and wiring. The panel should be secured to the rack cabinet
by the six mounting holes provided.
2.2 Cooling
The power supply is air cooled by an internal fan that pulls air into the power supply chassis from the
rear and side panels. The power supply is approximately 85% efficient, thus, 1100 watts of heat must
be removed from the cabinet. The customer must ensure a free flow of air is maintained through the
cabinet and keep the ambient air temperature at the input to the power supply below 104°F (40°C) or
even cooler (<35ºC) if 400VAC unit is operated at less than 360 VAC input.
The main air input to the power supply is on the right side. Auxiliary air inputs are on the rear panel.
The fan is located on the left side. All air passages must be unobstructed. If air filters are used on the
cabinet air input, they should be checked on a regular schedule for dirt and dust accumulation.
The inverters have a temperature sensor that will shut down and latch out further operation if an
over temperature condition should occur.

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2.3 Filament Module
The Filament Module is a stand-alone assembly and is located close to the filament and the vacuum
chamber. The high current (up to 75 amperes) in the secondary of the transformer can produce
excessive losses if the connections are not short and low in inductance. The box cover can be
removed for mounting the assembly to a secure location close to the bushings feeding
power to the filament. The cover is interlocked and must be reinstalled for operation to commence.
2.4 Electrical Power
The customers' input power plugs to a square flange receptacle TB-1 located on the lower left corner
of the rear panel of the power supply. All the power required for the system inputs at this point. A
mating plug is provided for the customers input power wires, four female pins and cable clamp are
included as part of the assembly.
The CV-6SL can be ordered for the following input voltage sources.
MODEL #CV-6SL 208V #6024-6010
208V-50/60Hz-3 Phase-4 Wire
Connect using AWG #10 stranded UL1015 wire
MODEL #CV-6SL 400V #6024-6009-0
400V-50/60Hz-3 Phase-5 Wire
Connect using AWG #12 stranded UL1015 wire
The 400V systems require an electrical neutral. The neutral supplies power to the single phase gun
loads. The neutral current is typically 6 amperes. An external EMI filter such as Schaffner FN356-25-
33 or FNL256-25-47 may be needed if conducted noise is a problem in the installation.
2.5 Grounds
Two ground studs are provided on the HVPS rear panel. Also the filament output box has a ground
stud. In addition, the interconnect cable has a ground conductor that ensures all assemblies are
grounded when interconnected. Connect a #10 AWG minimum protective earth ground wire to the
ground studs provided.
Power Supply: Rear Panel
Filament Transformer Module: Interface Panel
Each assembly should be connected to its local ground.
Power Supply: A protective earth ground should be provided as part of the electrical power input.
The user should make sure that each cabinet containing the power supply is grounded.
Filament Module:Ground to base of vacuum enclosure

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2.6 Power Supply Chassis To Filament Module
There are three cables interconnecting the power supply with the Filament Module. One cable is coaxial
and carries the high voltage. The high voltage cable plugs into the power chassis.
The outer shield is grounded to the power supply by a multi turn shell connector. The high voltage
cable connection to the filament module is filtered with a special shielded plug. The plug pushes
directly into the jack mounted in the filament module. A second cable connects the primary of the
filament transformer to its power source. The primary power is alternating voltage high frequency,
approximately 34kHz. The conductors are contained within an outer shield that is connected to
ground at each end. The third cable carries the position power supply output along with control power
for the relays and interlock circuits.
POWER SUPPLY CHASSIS
HIGH VOLTAGE FILAMENT PRIMARY CONTROLS/POSITION
J-104 J-106 J-108
W105 W103 W104
J-302 J-303 J-301
FILAMENT MODULE
2.7 Filament Transformer Connection
The filament module output connection is made by a dual conductor high voltage cable contained in a
flexible shielded conduit. The dual conductor consists of 15kV insulated wire twisted together and
run through the flexible conduit.
CAUTION
It is the customers responsibility to protect the cables extending beyond the end of the flexible
conduit. The cables operate at high voltage and must be interlocked to the power supply system.
2.8 Power Supply Control Connectors
There are two methods of connecting to the Power supply for control and monitoring signals. Three
connectors on the rear panel of the Power Supply are provided for controlling the power supply.
There is no switching implemented for selecting between the two control schemes, so that only one
type of control mode can be connected at any given time.
1) Remote I/O control:
The Rear Panel J112 Connector can be used to fully control and monitor both the HV and the
GUN power supplies.
2) Local Control
Compatibility with the controls and monitoring of the original CV-6S is provided via J101 (HV
control) and J103 (Gun Control) connectors. The local controls are separated into a high voltage
control section and a gun control section.
All cables described in the next two sections are available as separate items from the CV-6SL

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2.9 Remote I/O control
DB-25 Name
Ribbon
Pin
(Ref)
1 GUN ON +
Input +24 VDC (from Interlock chain).
Connect To Momentary (Normally Open
Switch) 1
2 GUN ON -
Output from Momentary contact to +24VDC
(Normally Open Switch). Momentary Close to
turn Gun On 3
3 GUN OFF +
Input +24 VDC (from Interlock chain). To
Normally Closed Switch. 5
4 GUN OFF -
Output from Momentary contact to +24 VDC
(Normally Closed Switch). Momentary Open to
turn Gun Off 7
5 EMISSION SET + 0 to 10 V Control. 100kohm input resistance. 9
6 EMISSION MON +
0 to 6 V Output = 0 to 600 mA. 100 ohm
source resistance. 11
7 FILAMENT I MON +
0 to 7.5V Output = 0 to 75 A. Source
resistance approx. 1k ohm 13
8 GUN ON CONFIRM +
From opto output, +24 VDC when True, 25mA
maximum 15
9 GUN SIG CNFRM PWR Connect to +24 VDC Source such as DB pin 12 17
10 GUN OFF CONFIRM +
From opto output, +24 VDC when True, 25mA
maximum 19
11 H2O INTERLOCK Opto input, Apply +24 VDC to satisfy Interlock 21
12 INTERLOCKS PWR +24 VDC Source from Power Supply 23
13 VAC INTERLOCK
From Vacuum Interlock, apply +24 VDC to
satisfy Interlock 25
14 VAC INTERLOCK PWR
Connected to DB pin 11 inside Power Supply.
Use as source +24 VDC Vacuum interlock 2
15 SHIELD COMMON GND 4
16 MONITOR COMMON GND 6
17 HV OFF+ +24 VDC Source from Power Supply 8
18 HV OFF -
Input +24 VDC (from DB pin 12). To
Normally Closed Switch. Momentary Open to
turn HV Off. Also should be connected to DB
pin 19 10
19 HV ON +
Opto Input +24 VDC. Should be connected to
DB pin 18. Also should be connected to
Momentary (Normally Open Switch) 12
20 HV ON -
Output from Momentary contact to +24 VDC
(Normally Closed Switch). Momentary Open to
turn HV Off 14
21 KV SET + 0 to 10V Control. 220 kohm input resistance. 16
22 KV MON +
0 to 10V Output = 0 to 10,000 V. 100 ohm
source resistance. 18
23 HV ON CONFIRM
From opto output, +24VDC when True, 25mA
maximum 20
24 HV SIG CNFRM PWR Connect to +24 VDC such as DB pin 12 22
25 HV READY CONFIRM +
From opto output, +24 VDC when True, 25mA
maximum 24

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Sample Remote I/O Connections

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2.10 Remote Interface:
The remote interface designed and supplied with the CV-6S may be connected to the CV-6SL using the
J-101 and J-102 cables:
HV CONTROL GUN CONTROL
J1 J1
25 COND. W101 15 COND. W102
RIBBON RIBBON
J-101 J-103
POWER SUPPLY CHASSIS
Remote Interface Connections:
If you are not going to implement any remote control or monitoring functions, the only system I/O
lines that must be connected are:
(1) those supplying interlock signals to the gun control unit (Section 2.11)
(2) the green-black wire pair in the gun control system I/O cable which must be jumpered together to
complete the normally-closed GUN GO OFF*ENABLE loop
(3) the green-black wire pair in the HV control system I/O cable which must be jumpered together to
complete the normally-closed HV GO OFF*/ENABLE loop
NOTE
The gun filament current cannot be switched on if the GUN GO OFF*/ENABLE loop is not complete
and the high voltage cannot be switched on if the HV OFF*/ENABLE loop is not complete. Either
function can be switched on with the other off, but emission current cannot be obtained unless both
OFF*/ENABLE loops are closed.
Guidelines For Connecting The External Interlocks
Each of the interlock signals listed in Section 2.11 supplied to each remote gun control unit. If all
guns are in one vacuum chamber, the TANK and VACUUM GAUGE interlocks must be connected
in parallel.
NOTE
All statements regarding operator and equipment safety are void if the external interlocks are not
correctly installed.
CAUTION
The interlocks are internally supplied with 24V DC. Only contact closure need be supplied. The
application of voltages to the interlock circuits will cause them serious damage.
Other I/O's: Control and Status Signals
The remote control inputs and status outputs include both digital and analog signals. Digital inputs
require a simple contact closure and carry 24V DC at approximately 20mA. All digital outputs are
from contact closures rated for 2A @ 220V AC or 2A @ 30V DC.

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Connecting the Gun Control-System I/O Cables(s)
(PN B-2-371-184: 10 Ft.)
(PN B-2-371-225: 20 Ft.)
Follow the procedure described below in connecting the gun control system I/O cable(s). Refer also
to page 11A shows the pinout for the signals that can be interfaced to the gun control unit via its
system I/O connector (G1-J13). Section 2.11 provides more detailed information about these signals.
STEP ACTION
1. Refer to Section 2.11 and determine which wires will be needed to interface the power
supply to the evaporation system. Tie the unused wires back to the cable insulation and
cover the ends with electrical tape. make sure that the exposed ends of the unused
conductors do not touch each other or ground.
2. Strip 1/4 inch of insulation away from the end of each of the remaining wires.
3. Attach one of the spade lugs provided with the cables to the end of each wire.
Hollingsworth crimping tool H-7B is recommended for this operation.
4. Carefully note the function of each color-coded wired (See Section 2.11) and connect each
spade lug to the appropriate terminal on the system terminal strip.
5. Plug the other end of the cable into rear panel connector, G1-J2, on the gun control unit.
Repeat this procedure for each additional gun, making sure that signals are routed correctly to either
gun control.
Connecting the HV Control System I/O Cable (PN B-2-371-226) 20 ft.
Follow the procedure described below in connecting the HV control system I/O cable(s). Refer also to
page 11A which shows the pinout for the signals that can be interfaced to the HV control unit via its
system I/O connector, HV-J11. Section 2.11 provides more detailed information about these signals.
STEP ACTION
1. Refer to Section 2.11 and determine which wires will be needed to interface the power
supply to the evaporation system. Tie the unused wires back to the cable insulation and
cover the ends with electrical tape. Make sure that the exposed ends of the unused
conductors do not touch each other.
2. Strip 1/4 inch of insulation away from the end of each of the wires that will be used.
3. Attach one of the spade lugs provided with the cables to the end of each wire.
Hollingsworth crimping tool H-7B recommended for this operation.
4. Carefully note the function of each color-coded wire (See Section 2.11) and connect each
spade lug to the appropriate terminal on the system terminal strip.

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2.11 Remote Wiring
2.11.1 Gun Control
Digital Interlock Inputs (Required)
INTERLOCK PIN WIRE FUNCTION
TANK 13, 14 O, BK Prevents the gun from being switched on unless
all vacuum system doors and covers are closed
and locked so that personnel cannot come into
contact with high voltage within the vacuum
cubicle.
VACuum 15, 16 W, R Protects the gun filament GAUGE by ensuring
that the product chamber ion gauge is on before
the gun is switched on
AUXiliary 18, 19 G, R Customer defined. Used with multi pocket
sources to ensure that the beam is OFF while the
turret is rotating. Must be jumpered ON if not
used; can also be jumpered on at JP1 on the
display panel PCB.
GUN WATER 20, 21 BL, R Prevents the gun from being switched on unless
it is receiving sufficient cooling water. Signal to
be supplied by a customer- installed flow switch.
POSITION 22, 23 Y, R Prevents the gun from being switched on unless
the beam is correctly positioned in the pocket.
Signal can be supplied via these lines by an
external beam sweep controller. If no external
sweep controller is used, the position PCB in the
gun interface chassis supplies this signal
internally.
Analog Control Inputs
SIGNAL G1-J13 WIRE
PAIR
FUNCTION
REMOTE
EMISSION
CURRENT
REQUEST
56, 57 O(+), R(-) If the gun control unit's REMote/RANGE switch
is in the REMOTE position, this input linearly
controls emission current within the selected
range: 0 V = min. current for the selected range;
+ 10V = max. current for that range
Digital Control Inputs
SIGNAL G1-J13 WIRE
PAIR
FUNCTION
REMOTE GUN
GO OFF*/ENABLE
5, 6 G, BK A momentary open pulse switched off the gun.
If all gun control interlocks are made, the gun
can be switched on again.
NOTE
If these pins are not connected to a remote
contact closure, they must be jumpered together
or the gun cannot be switched on.
REMOTE GUN
GO ON
7, 8 BL, BK If all gun control interlocks are made and the
GUN GO OFF*/ENABLE loop is closed, a 2-
sec. contact closure across these pins switches on
the gun.
FILAMENT
CURRENT
MONITOR
24, 25 Y, BK A 0 to 7.5 volt signal proportional to 0-75
amperes is available for driving a remote meter.
The impedance should be 1 megohm or higher.

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FILAMENT
BIAS SET
26, 27 BN, BK This feature is not connected in the CV-6SL.
The only Bias control is on the front panel of the
CV-6SL
Digital Outputs
SIGNAL J2 PIN # WIRE
PAIR
FUNCTION
GUN READY 1, 2 R, BK Indicates that all gun control interlocks are made
and that the GUN GO OFF*/ENABLE
loop is closed so the gun can be switched on.
GUN IS ON 3, 4 W, BK Indicates that the gun is switched on.
Analog Outputs
SIGNAL J2 PIN #WIRE
PAIR
FUNCTION
ACTUAL
EMISSION
CURRENT
50, 51 BR(+),R(-) Linearly represents the emission current drawn
by the gun controlled by this gun control unit: 0
V = 0 A; 10V =1A.
2.11.2 High Voltage Control
Digital Control Inputs
SIGNAL HV-J11 WIRE
PAIR
FUNCTION
HV GO OFF*/
ENABLE
3, 7 G, BK A momentary open pulse switches off the high
voltage. If all HV control interlocks are made,
contact closure of this line enables the HV to be
switched on.
NOTE
If these pins are not connected to a remote
contact closure, they must be jumpered together
or the HV cannot be switched on.
HV GO ON 4, 9 BL, BK If all HV control interlocks are made and the HV
GO OFF*/ENABLE loop is closed, a momentary
contact closure switches on the high voltage.
Analog Control Inputs
SIGNAL HV-J11 WIRE
PAIR
FUNCTION
REMOTE HIGH- 18, 19 W(+),R(-) If the HV control unit's VOLTAGE REQUEST
REMote/RANGE switch is in the REMOTE
position, this input linearly controls the high
voltage within the selected range.
NOTE
This input must be O V DC to +10V DC. The
HV circuit cannot be controlled by a -10V DC
input.
The local high voltage set, located on the high
voltage control panel, can be activated during
remote operation. Jumper the yellow wire
connected to pin 20 to the white wire connected
to pin 18.

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Digital Outputs
SIGNAL HV-J11 WIRE
PAIR
FUNCTION
HV READY 1, 5 R, BK Indicates that all HV control interlocks are
made and that the HV GO OFF*/ENABLE loop
is closed; the HV is ready to be switched on.
HV IS ON 2, 6 W, BK Indicates that the high voltage is on.
Analog Outputs
SIGNAL HV-J11 WIRE
PAIR
FUNCTION
ACTUAL HIGH 15, 16 BR(+),BK(-
)
Linearly represents the VOLTAGE load (gun)
voltage: 0V = 0 kV, 10V = 10kV
TOTAL POWER
SUPPLY
CURRENT
22, 23 O(+),BK(-) Linearly represents the total power supply
current (i.e., the total emission current drawn by
all guns powered by the power supply): 0 V = 0
A; 10V = 1A
2.11.3 Customer EPO (Emergency Panic Off)
An Amphenol plug is required for the customer connector, AN3106-14-2P, jumper pins C & D
for operation.
3.0 CONTROLS AND OPERATION
3.1 Front Panel Indicators and Controls
The Front Panel provides ten LED indicators, a Digital Panel Meter with three switch select settings, a
Bias Potentiometer, an Emergency Off Switch and the main circuit breaker.
3.1.1 LED Indicators:
PWR ON: AC Power is supplied and LV DC power supplies are on.
HV ON: Will Glow Yellow when the HV Power supply is ready but OFF
Will Glow Green when HV is ON
GUN ON: Will Glow Yellow when the GUN Supply is ready but OFF
Will Glow Green when Filament Supply (Gun) is ON
PS Fault: Any of the Fault conditions detailed below is true. HV will be OFF
KV Overvoltage Fault: Output HV exceeded 10.6kV
KV Overcurrent Fault: Output emission current exceeded 630mA
KV Out of Reg: Unit is not Voltage regulating within specification.
Arc Counter Fault: A series of arcs in excess of the arc counter setting have occurred
Rail Fault: Excessive current was drawn by the inverter power switches
Step Start Fault: The Inverter DC rail could not be charged during HV turn On
3.1.2 Digital Panel Meter: 3 ½ Digit LCD Panel Meter with 3 position selection switch
EM I: Emission Current, 0 to 600 mA
FIL I: Filament (Gun) Current, 0 to 75.0 A
kV: HV output, 0 to 10.00 kV

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3.1.3 Bias Potentiometer: 10 Turn Pot accessed through Recessed opening. The potentiometer
is set at a current below the normal operating current. The bias
functions as a preheat or idle for the filament. This is the only
control that will affect the bias setting on the CV-6SL.
3.1.4 Emergency Off Switch: When pushed, opens the interlock and immediately turns off the HV
and Gun. When Emergency Off is activated, neither HV nor Gun
can be turned on. Rotate CW to clear the Emergency Off condition.
3.1.5 Main Power On: Turn AC power on and off. Is also a 20A circuit breaker that will
open in the event of excessive AC line current.
3.2 High Voltage Controls
The high voltage power supply is protected by a main circuit breaker and controlled by a contactor at
its input. When the circuit breaker is OFF, all power to the system is OFF. When the circuit breaker is
closed and the contactor is open, only the high voltage power supply is OFF.
The high voltage power supply is a closed loop voltage regulated supply. There is an internal
potentiometer adjust on the regulator circuit card that limits the maximum current available from the
supply. When the limit, usually factory set at 660mA, is reached, the regulator automatically transfers
from the voltage regulation to current regulation and continues operation in the current regulation
mode. This will cause the KV Out of Reg LED to light.
3.3 High Voltage Interlock Chain
There is a series chain of interlocks that must be closed for high voltage operation. If any one of the
interlocks in the chain is open, the high voltage ON contactor cannot be closed and, if an interlock
opens during operation, the contactor opens, turning OFF high voltage. The door interlock LED will
be illuminated with a fault or an opening in the interlock chain. The contacts in the interlock chain are:
• Temperature switch PS-S1 on the inverter heat sink
• Emergency OFF switch PS-S3 power supply front panel
• Access switch S-301 in the filament module
• EPO J110 Pins C and D
• The Rear Panel Remote I/O connector Interlocks are:
• VAC Interlock
• H2O Interlock
• HV OFF normally closed pushbutton
• The Control Panel Interlocks are:
• High voltage OFF push-button HV S1 (If Control Panel is used)
• Key switch HV-S5 on the high voltage control panel (If Control Panel is used)
• Remote high voltage OFF HV-J2, wires green and black on the remote interface.
• The "DOORS" indicator on the control panel (if used) will extinguish when all the interlocks
are closed and the interlock chain is satisfied.
NOTE: The interlocks will be satisfied if either of the control schemes (Rear Panel Remote I/O, J112 or
the Control Panel) properly satisfy their interlock requirements. When using the Control Panel it is not
necessary to work the interlocks on the Rear Panel Remote I/O connector.

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3.3 High Voltage "Ready"
The high voltage power supply is in a "ready" to turn on condition when the interlock chain is closed
and the internal faults are reset. The internal faults circuits located on the High Voltage regulator
circuit board 9120028-010 are summed and if the Control Panel is used, displayed on the high voltage
control as HV-I7. “Fault”
The Front Panel LED “HV ON” will glow yellow when the high voltage power supply is “ready”.
3.4 High Voltage ON
When the high voltage ON push-button is depressed, the regulator circuit card commands the high
voltage ON as a two step function. First, the auxiliary contactor K1 pulls in and the DC rail capacitor
is charged slowly through a series impedance. When the charge is complete, the main three phase
contactor K2 is commanded to close. After the two step function is completed, the inverter is enabled
and high voltage ramps ON. The high voltage will ramp up to the voltage commanded. The turn ON
has a ramp of approximately 20 milliseconds.
The Front Panel LED “HV ON” will turn Green when the high voltage power supply turns HV ON.
3.5 Control Panel Display and Indicators (if used)
3.5.1 High Voltage Power Supply Meters
The LCD meter provides two readouts for the power supply: output DC voltage and total
output DC current.
Switch HV S4 selects voltage as "10.00" kV and current as "600" mA. At initial turn on, the
output voltage can be monitored. However, the output current will be zero until the gun has
been turned ON and the filament circuit becomes active.
3.5.2 Out Of Regulation Indicator
The "out of regulation" indicator is illuminated anytime high voltage has been turned ON and
the output voltage is out of the + 0.5% voltage regulation window.
The operator will note the indicator flashes ON at turn-on and is extinguished as the output
voltage arrives at the commanded level.