TDK-Lambda LC1202 User manual

83494001 Rev J
INSTRUCTION MANUAL FOR
LC1202 HIGH VOLTAGE
POWER SUPPLY
83494001 Revision J
TDK-Lambda Americas Inc.
405 ESSEX ROAD, NEPTUNE, NJ 07753
TEL: [phone]
FAX: [phone]
WEB: www.us.tdk-lambda/hp

Page: 83-000-006 Rev D
TDK-Lambda
MANUFACTURER'S PRODUCT DECLARATION
INTENDED PURPOSE (USE)
The Power Supplies described by this manual are defined by TDK-Lambda Americas Inc.
as a component for use in the composition of an apparatus as defined in Article 1 (1) of
the EMC Directive (89/336/EEC). These products, as individual components, do not
perform in themselves a direct function for the user of the end product. They are not
intended to be placed on the market with a direct function to a final user! As such, the
products described by this manual are not subject to the provisions of the EMC Directive
(89/336/EEC, with amendment 92/31/EEC).
The products described by this manual are intended for incorporation into a final product
by a professional assembler. It is the responsibility of the assembler to ensure that the
final apparatus or system incorporating our products complies with all relevant EMC
standards for that final product.
OPERATING ENVIRONMENT
The operating environment as defined by TDK-Lambda Americas Inc., for the products
described by this manual is stated as follows:
The Power Supplies described by this manual are intended for use in a protected
industrial environment or in proximity to industrial power installations. These locations are
often referred to as industrial locations containing establishments that are not connected
to the low voltage public mains network.
Industrial locations are characterized by the existence of one or more of the following
conditions:
1) industrial, scientific and medical (ISM) apparatus are present;
2) heavy inductive or capacitive loads are frequently switched;
3) currents and associated magnetic fields are high;
4) location supplied by their own transformer.
These components are not intended for connection to a public mains network, but are
intended to be connected to a power network supplied from a high or medium-voltage
transformer dedicated for the supply of an installation feeding manufacturing or similar
operations. They are suitable for use in all establishments other than domestic and those
directly connected to a low voltage power supply network which supplies buildings used
for domestic purposes.

83
-
000
-
005 Rev F
ONE YEAR WARRANTY
TDK
-
Lambda Americas
, Inc. (405 Essex Road, Neptune, N.J. 07753), warrants that the unit is free from defects in
material or workmanship for a period of ONE YEAR from the date of initial shipment.
TDK
-
Lambda Americas
Inc.
will
service and,
at its option, repair or replace parts which prove to be defective. This will be done free of charge during
the stated warranty period. This warranty excludes defects resulting from mi
s
use, unauthorized modification,
operation outside the environmental or
safety specifications of the power supply, or improper site preparation or
maintenance. The customer shall contact
TDK
-
Lambda Americas Inc.
, for warranty service or repair as described in
the RETURNING EQUIPMENT section. The customer shall prepay shipping
charges. If the unit is covered under the
foregoing warranty, then
TDK
-
Lambda Americas Inc.
shall pay the return shipping charges.
The “WARRANTY”, “CLAIM FOR DAMAGE IN SHIPMENT”, and “RETURNING EQUIPMENT” i
n
formation applies to
equipment purchased directl
y from
TDK
-
Lambda Americas Inc
. End users receiving equi
p
ment from a third party
should consult the appropriate service organization for assistance with these issues.
THIS LIMITED WARRANTY IS IN LIEU OF, AND
TDK
-
LAMBDA AMERICAS INC.
DISCLAIMS AND EXCLUDES
,
ALL OTHER WARRANTIES, STATUTORY, EXPRESS OR IMPLIED, INCLUDING, WITHOUT LIMITATION, ANY
WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, OR OF CONFORMITY TO
MODELS OR SAMPLES.
CERTIFICATION
All test and measuring equipment used by
TDK
-
La
mbda Americas
Inc.
for Final Acceptance Testing are traceable to
primary standards certified by the National Institute of Standards and Technology.
LETHAL VOLTAGES PRESENT!
All power supplies contain hazardous voltage and energy. The power supply must
only be operated by qualified
personnel who have read this operator’s manual and are familiar with the operation, hazards and application of the
power supply. Proper care and jud
g
ment must always be observed.
1.
Before connecting input AC power, ensure all c
overs are in place and securely fastened. E
n
sure the required
safety ground to chassis is installed and sufficient cooling is su
p
plied.
2.
Proper grounding from the input AC power is required to reduce the risk of electric shock, and to comply with
safety age
ncy and code requirements.
3.
Use extreme caution when connecting input AC power. Only apply the input voltage specified on the rating label.
4.
Use extreme caution when connecting any high voltage cables. Never handle any output c
a
bles when the power
supply is
operating.
5.
After a power supply is switched OFF, its output section will retain a charge which may be lethal. Allow sufficient
time for self
-
discharge before handling anything connected to the output. The di
s
charge time specified in the
Safety Notes does
N
OT
include extra time required to discharge the energy stored in the user’s load.
6.
When user serviceable fuses are present, always replace fuses with the same type and Volt/Amp ra
t
ing.
7.
Never attempt to operate the power supply in any manner not described in
this manual.
8.
Never remove DANGER or WARNING labels from the power supply. Replace lost or damaged labels
immediately. Contact
TDK
-
Lambda Americas
Customer Service for replacement labels.
9.
The power supply may be serviced only by
TDK
-
Lambda Americas Inc.
fa
ctory qualified service personnel.
Breaking the warranty seal will void the warranty. Prior to opening the power supply, contact
TDK
-
Lambda
Americas
Inc.
Customer Service for a written Service Waiver and a replacement warranty seal.

Page: 83-000-007 Rev E
TDK-Lambda
Description of symbols used in product labeling
SYMBOL
PUBLICATION
DESCRIPTION
EC Council
Directive 93/68/EEC
European Community
Conformity Assessment
Product Mark
IEC 348
Attention, consult
Accompanying documents
IEC 60417-1-5036
Dangerous voltage
IEC 60417-1-5019
Protective earth
(e.g. power line earth ground)
IEC 60417-1-5017
Functional earth
(e.g. chassis ground)
IEC 60417-1-5134
Electrostatic Discharge
(ESD) Sensitive Device

Page: 83000011 Rev L
ELECTRICAL STANDARDS
All company primary standards are either certified or are traceable to certification by the
National Institute of Standards and Technology.
CLAIM FOR DAMAGE IN SHIPMENT
This instrument received comprehensive mechanical and electrical inspection before
shipment. Immediately upon receipt from the carrier, and before operation, this instrument
should be inspected visually for damage caused in shipment. If such inspection reveals
damage in any way, a claim should be filed with the carrier. A full report of damage should
be obtained by the claim agent and this report should be forwarded to us. We will then
provide a disposition of the equipment and arrange for repair or replacement.
When referring to this equipment, always include the model and serial numbers.
The “WARRANTY”, “CLAIM FOR DAMAGE IN SHIPMENT”, and “RETURNING
EQUIPMENT” information applies to equipment purchased directly from TDK-
Lambda Americas Inc. End users receiving equipment from a third party should
consult the appropriate service organization for assistance with these issues.
RETURNING EQUIPMENT
Before returning any equipment to the factory, the following steps shall be taken.
1. Notify TDK-Lambda Americas Inc. at [phone] or follow the instructions at
US.TDK-Lambda.com/HP/service.htm. Give a full description of the difficulty
including the model and serial number of the unit in question. Upon receipt of this
information, we will assign a Return Material Authorization (RMA) number and
provide shipping instructions.
2. The customer shall prepay shipping charges. Equipment returned to us must be
packed in a manner to reach us without damage. The shipping container must be
marked with the RMA number in an area approximate to the shipping label with
numbers that are easy to read. All returned units that do not show the RMA number
on the outside of the container will be refused.
If the equipment is repaired within the warranty agreement, than TDK-Lambda
Americas Inc. shall pay for the return shipping to the customer.
3. For non-warranty repairs, we will submit a cost estimate for your approval prior to
proceeding. The customer shall pay return shipping charges.
MECHANICAL INSTALLATION
Most power supplies are heavy and, when rack mounted, they should be supported by
rails along the sides of the supply from front to rear. The rails must adequately support the
unit and not block airflow. Do not support the power supply from the front panel only.

83494001 Rev J
Table of Contents
Description Page
1 GENERAL
1
1.1 INTRODUCTION
1
2 SPECIFICATIONS
2
2.1 AVERAGE CHARGING RATE
2
2.2 PEAK CHARGING RATE
2
2.3 STANDARD OUTPUT VOLTAGES/CURRENTS
2
2.3.1 LINEARITY
2
2.3.2 ACCURACY
2
2.4 POLARITY
2
2.5 HV INSULATING MEDIUM
2
2.6 INPUT CONNECTIONS
2
2.7 INPUT REQUIREMENTS
2
2.8 POWER FACTOR
2
2.9 EFFICIENCY
2
2.10 STORED ENERGY
2
2.11 STABILITY
3
2.12 PULSE REPEATABILITY
3
2.13 PHYSICAL DIMENSIONS
3
2.14 WEIGHT
3
2.15 MOUNTING
3
2.16 WATER FITTINGS
3
2.17 COOLING WATER
3
2.18 AIR COOLING
3
2.19 AMBIENT TEMPERATURE
3
2.19.1 STORAGE
3
2.19.2 OPERATING
3
2.20 HUMIDITY
3
2.21 FAULT PROTECTION
3
2.22 PROTECTION
3

83494001 Rev J
2.23 VIBRATION
4
2.24 SHOCK
4
2.25 FRONT PANEL DISPLAY
4
3 INSTALLATION
6
3.1 INITIAL INSPECTION
6
3.2 MOUNTING AND COOLING REQUIREMENTS
6
3.3 GROUNDING AND INPUT AC POWER
6
3.4 POWER CORD SPECIFICATION
7
3.5 CONNECTING HIGH VOLTAGE OUTPUT
7
3.6 GROUNDING THE PRODUCT
8
3.6.1 GROUNDING OF INPUT LINE
8
3.6.2 OUTPUT GROUND CONNECTION
8
4 OPERATION
10
4.1 L, S, OEM MODELS
10
4.2 REAR PANEL
11
4.3 FRONT PANEL CONTROL (L MODEL ONLY)
12
4.3.1 POWER SWITCH
12
4.3.2 CONTROL SWITCH
12
4.3.3 HV ON SWITCH
12
4.3.4 HV OFF SWITCH
12
4.3.5 VOLTAGE ADJUST
12
4.3.6 VIEW SET
12
4.4 REMOTE CONTROL (L, S, OEM MODELS)
13
4.5 INITIAL CHECK-OUT PROCEDURE
16
5 APPLICATIONS
17
5.1 DETERMINING CAPACITOR CHARGE TIME
17
5.2 VOLTAGE REVERSAL
17
5.3 PARALLELING UNITS
18
5.4 MEASURING HIGH VOLTAGES
18
5.5 DETERMINING AC LINE CURRENT
19

83494001 Rev J
5.6 OPERATION AS A DC POWER SUPPLY
19
5.7 OPERATION WITH REMOTE VOLTAGE SENSE
19
6 MAINTENANCE AND TROUBLESHOOTING
20
6.1 SAFETY PRECAUTIONS
20
6.2 CALIBRATION
20
6.2.1 OUTPUT VOLTAGE LEVEL
20
6.2.2 OVERVOLTAGE TRIP POINT
20
6.3 MAINTENANCE
20
6.4 TROUBLESHOOTING
20
7 INPUT VOLTAGE CONVERSION PROCEDURE
22
7.1 OVERVIEW
22
7.2 CONVERSION PROCEDURE
22
7.2.1 CHANGE SELECTOR BOARD
22
7.2.2 CHANGE FUSE
22
7.2.3 SELECTOR SWITCHES ON AUX POWER BOARD
23
7.2.4 CORRECTING THE INPUT LABEL
23
List of Figures
Description Page
Figure 1 LC1202 Block Diagram
1
Figure 2 Mechanical Details
5
Figure 3 Input AC Power Connections
7
Figure 4 Output Ground Connection
9
Figure 5 Model LC1202L
10
Figure 6 Model LC1202S
10
Figure 7 Model LC1202 OEM
11
Figure 8 Rear Panel
12
Figure 10 Suggested Interface
15
Figure 11 Power Supply Top View
24
Figure 12 Power Supply Bottom View
25
Figure 13 Aux Board
26
Figure 14 Fuse Assembly
27

83494001 Rev H Page 1 of 27
1 GENERAL
1.1 INTRODUCTION
The LC1202 is a liquid cooled high voltage switching power supply designed for charg-
ing capacitors in laser systems and modulated applications. They are specifically de-
signed for operation in any position or orientation with very high pulse to pulse repeat-
ability at high rep rates. The LC1202 provides 12kW average power and 13.5kJ/s
peak power at the rated output voltage.
The LC1202 incorporates high frequency IGBT based resonant inverter topology for
generation of the output power. The control scheme provides excellent regulation of
the output voltage and automatically compensates for line, load and temp variations.
The latest development resonant inverter topology which improves pulse to pulse re-
peatability by reducing the ripple or “bucket effect” even at very high pulse repetition
frequencies. The high voltage tank has been specially designed with liquid cooling and
forced convection cooling. This allows the power supply to be operated in any orienta-
tion. The output voltages of the LC1202 supply are fully adjustable over each range.
This product is NOT protected against external load voltage reversal events. Load
voltage reversal may result in damage to the unit which is not covered by the standard
product warranty. See our online App Note 517 for details.
Figure 1 LC1202 Block Diagram

83494001 Rev H Page 2 of 27
2 SPECIFICATIONS
2.1 AVERAGE CHARGING RATE
12,000J/sec at rated output voltage
2.2 PEAK CHARGING RATE
13,500J/sec at rated output voltage
2.3 STANDARD OUTPUT VOLTAGES/CURRENTS
Voltage
Current at 100%
of rated V
1KV
27A
2KV
13.5A
4KV
6.75A
5KV
5.4A
10KV
2.7A
20KV
1.35A
30KV
0.9A
2.3.1 LINEARITY:
To within ±1% of full scale
2.3.2 ACCURACY:
To within ±1% of rated output
2.4 POLARITY
Available as fixed positive or negative.
2.5 HV INSULATING MEDIUM
Silicone oil
2.6 INPUT CONNECTIONS
Via 4 position VDE/IEC approved terminal block. Connections are Ø1, Ø2, Ø3, and
ground.
2.7 INPUT REQUIREMENTS
3P208 - 180 - 250V, 50/60Hz, 50A max.
3P400 - 340 - 460V, 50/60Hz, 26A max.
3P480 –432 - 528V, 50/60Hz, 20A max.
2.8 POWER FACTOR
>0.90
2.9 EFFICIENCY
>90%
2.10 STORED ENERGY
<0.3J in output stage

83494001 Rev H Page 3 of 27
2.11 STABILITY
<0.2%/hr after 1 hr warm up
2.12 PULSE REPEATABILITY
±0.1% to 300Hz - Standard
±0.3% to 1000Hz - Standard
±0.1% to 1000Hz - Available
2.13 PHYSICAL DIMENSIONS
8.75”/222mm H (5U) x 19”/483mm W x 17”/432mm D. Depth of handles over panel
7/8”/20mm.
2.14 WEIGHT
Approximately 100 pounds/46 kg
2.15 MOUNTING
Chassis support rails or brackets required.
2.16 WATER FITTINGS
Swagelok 12mm
2.17 COOLING WATER
2GPM/7.6 liters/min, max supply temp 35°C. All water paths are at ground potential
and are copper or brass. An analog temp signal, 0-10VDC, is provided for a heat sink
temp of 10°-60°±3°C at the DB-25 remote connector.
2.18 AIR COOLING
Internal, 100CFM. Supply makeup air not required.
2.19 AMBIENT TEMPERATURE
2.19.1 STORAGE:
–20°C to +70°C
2.19.2 OPERATING:
+5°C to +45°C
2.20 HUMIDITY
<90%, non-condensing
2.21 FAULT PROTECTION
Three line fuses, accessible through rear panel of power supply.
2.22 PROTECTION
The power supply is protected against open and short circuit operation, current over-
loads, and arcs.

83494001 Rev H Page 4 of 27
2.23 VIBRATION
Meets MIL-STD-810E, Method 514.4. Basic Transportation Common Carrier 10-
500Hz, 0.015g2/Hz. Duration = 1 hour
2.24 SHOCK
25Gpk, half sinewave 11ms.
2.25 FRONT PANEL DISPLAY
Voltage and current 3½ character indicators, 10 segment voltage and current
trend graphs, HV ON push button, HV ON indicator, power supply status signals.
3 Position Key SW. Local/Remote/OFF. Key is removable in all positions.

83494001 Rev H Page 5 of 27
Figure 2 Mechanical Details

83494001 Rev H Page 6 of 27
3 INSTALLATION
3.1 INITIAL INSPECTION
The shipping container should contain the following items: power supply, HV output ca-
ble, test data sheets and operator's manual. Examine the items immediately for dam-
age. Locate the serial number labels on the power supply and verify the model number,
the input voltage rating and the output voltage rating and polarity. In the event of any
damage promptly notify the transportation company and the TDK-Lambda Americas Inc.
customer service manager.
3.2 MOUNTING AND COOLING REQUIREMENTS
The power supply can be mounted in a standard 19" EIA enclosure or equivalent.
Chassis support brackets or rails must be added to the bottom of the power supply for
proper weight distribution. The power supply can also operate on a bench or table top.
In all cases adequate clearances must be provided for cable bends. Generally, at least
4" (161.6mm) of clearance should be allowed at the rear of the power supply.
When operating in an enclosed system, care must be taken to ensure the ambient air to
the power supply does not exceed the maximum ambient operating temperature of
45°C, this may require addition of a system heat exchanger.
The power supply requires a cooling water supply with a minimum 2GPM (7.6 l/m) flow
and a maximum inlet temp of 35°C. The water connection is at the rear of the supply.
The connection is SWAGELOK 12mm. The water flow direction must be as marked on
the rear panel. All water connections are at ground potential. The power supply can be
operated in any orientation/position.
3.3 GROUNDING AND INPUT AC POWER
Proper grounding of the input AC power is required to reduce the risk of electric shock.
The metal chassis of the power supply is grounded through the green ear thing wire at
the input AC power terminal block. Use extreme caution when connecting AC input
power and never apply the incorrect input power. Connect the three lines of the input
power to the L1, L2, L3 terminals and the earth ground to the terminal marked with the
protective earth symbol. No neutral connection is required for the 200V and 400V con-
figurations. Verify the input voltage configuration (208 or 400VAC) is on the nameplate
on the rear panel before applying the correct voltage. Applying incorrect voltage will im-
mediately cause major damage and void the warranty. The input voltage change should
only be performed by qualified technical personnel equipped with proper parts and de-
tailed instructions from the factory. Refer to Section 5 "Applications", to calculate line
currents for various operating conditions such as reduced power or charging very large
capacitor banks.

83494001 Rev H Page 7 of 27
Figure 3: Input AC Power Connections
3.4 POWER CORD SPECIFICATION
Use wire with a minimum of 8 AWG. (diameter = 0.147” (3.73mm)) and 600V insulation.
3.5 CONNECTING HIGH VOLTAGE OUTPUT
Ensure that the power supply is off and disconnected from the input power and
that all load capacitors are discharged and shorted to ground before making any
connections. Never handle the HV cable during operation.
Always use the HV connector and cable provided with the power supply or an equivalent
substitute provided by TDK-Lambda Americas Inc. Fully insert the connector end of the
HV cable and tighten the locking nut only "hand tight".
When operating above 20kV or 200 Hz rep rate it is recommended that a silicone
grease (such as Dow Corning DC-4) be used on the HV cable before insertion into the
HV connector. This displaces the air in the connector and reduces long term corona ef-
fects.
The HV cable shield is connected to the power supply chassis and should be used as
the HV return. An additional grounding stud is provided adjacent to the HV connector
and should also be connected to the HV return. The standard shielded HV cable can
contact earth ground without consequence. The optional unshielded silicone HV cable
can also contact ground, but isolating it will minimize the effects of corona in the system.

83494001 Rev H Page 8 of 27
Keep the minimum HV cable bend radius greater than 4" (101.6mm) to minimize stress
on the insulation. Keep the HV cable as distant as possible from the input power and the
input control signals.
To connect the HV cable to the load it is necessary to remove the cable jacket, shield,
and any semiconducting layer that remains on the cable insulation after removing the
shield.
The cable outer jacket should be removed to reveal the cable shield. At least 12” or
300mm of outer jacket should be removed for suitable voltage hold-off. The exposed
shield should be trimmed to an appropriate length and terminated with a ground connec-
tion.
With the shield removed, the black semiconducting layer is exposed. This layer should
be very carefully removed using a sharp craft knife, and a peeling action. Once the sem-
iconducting layer is removed the exposed EPR insulation should be cleaned with IPA or
an equivalent solvent. If any of the semiconducting layer remains on the HV cable insu-
lation it may cause the cable termination to fail.
Some peak current will flow out of the power supply during discharge and return through
the HV return and system chassis. This current comes from voltage reversal in under-
damped systems and from normal discharge of filter and cable capacitance. The path
for this current should not parallel control signal returns since the resulting voltages
could interfere with normal system operation. When due to voltage reversal at high rep
rates, this current could damage the power supply. Generally a resistor in series with the
HV output can be added to limit this current to an acceptable level. Refer to Section 5.2
"Applications" for more information.
The oil-filled HV assembly should not be opened. The oil and components have been
specially cleaned and vacuum impregnated at the factory and the assembly hermetically
sealed. Opening the assembly will compromise performance.
3.6 GROUNDING THE PRODUCT
3.6.1 GROUNDING OF INPUT LINE:
The supply is grounded through the ground terminal of the input connector. A protective
ground connection by the way of the grounding conductor in the input terminal is essen-
tial for safe operation.
3.6.2 OUTPUT GROUND CONNECTION:
It is important that there be a ground connecting the supply to the load as shown in Fig-
ure 4.

83494001 Rev H Page 9 of 27
Figure 4 Output Ground Connection
This product is NOT protected against external load voltage reversal events. Load
voltage reversal may result in damage to the unit which is not covered by the standard
product warranty. See our online App Note 517 for details.

83494001 Rev H Page 10 of 27
4 OPERATION
4.1 L, S, OEM MODELS
Model LC1202L: This model has full front panel instrumentation for use in laboratory,
prototype or OEM systems. The LC1202L can be operated either from the front panel or
from the rear panel remote control connector. The front panel includes power on/off,
remote/local and HV on/off switches, output voltage adjust, view set switch, digital volt-
age and current meters, quick reference bar graphs and status indicators. An internal
AC contactor is included which is controlled by the front panel power switch. The model
LC1202L can be operated as a "master" unit in parallel with several model LC1202S
"slave" units for increased output power. Refer to Section 5.3 "Paralleling Units".
Figure 5 Model LC1202L
Model LC1202S: This model has only a power switch and status indicators on the front
panel. It must be operated through its remote control connector and can function as a
standalone unit or in parallel with other units. Several model LC1202S units can be par-
alleled as "slaves" controlled by either a "master" LC1202L or a single remote control
circuit. An internal AC contactor is included which is controlled by the front panel power
switch.
Figure 6 Model LC1202S

83494001 Rev H Page 11 of 27
Model LC1202 OEM: This model has a blank front panel and is operated the same as an
LC1202S, from the remote control connector only. It can function as a stand alone unit or
in parallel for increased output power. The basic model LC1202 OEM is supplied by ex-
ternally controlled AC power. It can also be configured with either an internal AC contac-
tor or front panel circuit breaker option.
Figure 7 Model LC1202 OEM
4.2 REAR PANEL
Figure 8 shows the rear panel of the model LC1202L. The REMOTE connector is used
to control the power supply when the CONTROL KEY SWITCH on the front panel is in
the REMOTE position. The INTERLOCK terminal block (internal 24 DC) can be con-
nected to system interlocks to disable the power supply when opened. Jumper the two
terminals together allows the power supply to operate. The INHIBIT connector allows for
easily connecting a pulsed INHIBIT signal when operating from the front panel. The
INHIBIT signal in the REMOTE connector can be used when operating in remote control
mode. The SLAVE connector is used to control model LC1202S power supplies operat-
ing in parallel with an LC1202L "master" unit. The model LC1202S and model LC1202
OEM do not have the INHIBIT and SLAVE connectors.
Note: The Inter-lock terminals are connected to internal 24 VDC circuits and
should never be connected to ground.

83494001 Rev H Page 12 of 27
Figure 8 Rear Panel
4.3 FRONT PANEL CONTROL (L MODEL ONLY)
4.3.1 POWER SWITCH:
Connects AC input power to the control circuitry and closes the internal AC contac-
tor if the interlock is closed.
4.3.2 CONTROL SWITCH:
Directs the power supply to take on/off and voltage program commands from ei-
ther the front panel (LOCAL position) or the remote control connector (REMOTE
position). The OFF position disables the power supply regardless of other com-
mands.
4.3.3 HV ON SWITCH:
Turns on the high voltage output to the level set by the HV adjust knob. Also used
with HV OFF to reset latched fault conditions: overvoltage, open circuit, over-temp,
AC undervoltage, interlock open, overload and inverter current.
4.3.4 HV OFF SWITCH:
Turns off the high voltage output.
4.3.5 VOLTAGE ADJUST:
Clockwise increases the output from zero to maximum, 10 turns full scale.
4.3.6 VIEW SET:
Previews the voltage adjust set point before HV ON. Also displays set point during
operation to indicate whether a load condition is affecting the desired HV output
level.