California Instruments 2253i User manual

Revision J
November 2017
Copyright 2006-2017
AMETEK Programmable Power Division
All rights reserved.
P/N 6005-962
2253i / 2253iX
AC and DC Power Source
User Manual
TEL: [phone]
FAX: [phone]
Email: [e-mail]
Web Site: http://www.programmablepower.com

User Manual 2253i / 2253iX
AMETEK California Instruments 2
Refers to:
Models:
2253i AC and DC Power Source
2253iX AC and DC Power Source/Analyzer

User Manual 2253i / 2253iX
AMETEK California Instruments 3
About AMETEK
AMETEK Programmable Power, Inc., a Division of AMETEK, Inc., is a global leader in the design
and manufacture of precision, programmable power supplies for R&D, test and measurement, process
control, power bus simulation and power conditioning applications across diverse industrial
segments. From bench top supplies to rack-mounted industrial power subsystems, AMETEK
Programmable Power is the proud manufacturer of Elgar, Sorensen, California Instruments and
Power Ten brand power supplies.
AMETEK, Inc. is a leading global manufacturer of electronic instruments and electromechanical
devices with annualized sales of $2.5 billion. The Company has over 11,000 colleagues working at
more than 80 manufacturing facilities and more than 80 sales and service centers in the United States
and around the world.
Trademarks
AMETEK is a registered trademark of AMETEK, Inc. California Instruments is a trademark owned by AMETEK,
Inc. Other trademarks, registered trademarks, and roduct names are the ro erty of their res ective owners
and are used herein for identification ur oses only.
Notice of Copyright
2253i/iX Series User Manual © 2006-2014 AMETEK Programmable Power, Inc. All rights reserved.
Exclusion for Documentation
UNLESS SPECIFICALLY AGREED TO IN WRITING, AMETEK PROGRAMMABLE POWER, INC.
(“AMETEK”):
(a) MAKES NO WARRANTY AS TO THE ACCURACY, SUFFICIENCY OR SUITABILITY OF ANY TECHNICAL OR
OTHER INFORMATION PROVIDED IN ITS MANUALS OR OTHER DOCUMENTATION.
(b) ASSUMES NO RESPONSIBILITY OR LIABILITY FOR LOSSES, DAMAGES, COSTS OR EXPENSES, WHETHER
SPECIAL, DIRECT, INDIRECT, CONSEQUENTIAL OR INCIDENTAL, WHICH MIGHT ARISE OUT OF THE USE
OF SUCH INFORMATION. THE USE OF ANY SUCH INFORMATION WILL BE ENTIRELY AT THE USER’S
RISK, AND
(c) REMINDS YOU THAT IF THIS MANUAL IS IN ANY LANGUAGE OTHER THAN ENGLISH, ALTHOUGH STEPS
HAVE BEEN TAKEN TO MAINTAIN THE ACCURACY OF THE TRANSLATION, THE ACCURACY CANNOT BE
GUARANTEED. APPROVED AMETEK CONTENT IS CONTAINED WITH THE ENGLISH LANGUAGE VERSION,
WHICH IS POSTED AT WWW.PROGRAMMABLEPOWER.COM.
Date and Re ision
November 2017, Revision J
Part Number
6005-962
Contact Information
Tele hone: 800 733 5427 (toll free in North America)
858 450 0085 (direct)
Fax: [phone]
Email: sales@ rogrammable ower.com
service@ rogrammable ower.com
Web: www. rogrammable ower.com

User Manual 2253i / 2253iX
AMETEK California Instruments 4
Important Safety Instructions
Before applying power to the system, verify that your product is configured properly for your
particular application.
WARNING
Hazardous voltages may be present when covers are removed. Qualified
personnel must use extreme caution when servicing this equipment.
Circuit boards, test points, and output voltages also may be floating above
(below) chassis ground.
WARNING
The equipment used contains ESD sensitive parts. When installing
equipment, follow ESD Safety Procedures. Electrostatic discharges might
cause damage to the equipment.
Only qualified personnel who deal with attendant hazards in power supplies, are allowed to perform
installation and servicing.
Ensure that the AC power line ground is connected properly to the Power Rack input connector or
chassis. Similarly, other power ground lines including those to application and maintenance equipment
must be grounded properly for both personnel and equipment safety.
Always ensure that facility AC input power is de-energized prior to connecting or disconnecting any
cable.
In normal operation, the operator does not have access to hazardous voltages within the chassis.
However, depending on the user’s application configuration, HIGH VOLTAGES HAZARDOUS TO
HUMAN SAFETY may be normally generated on the output terminals. The customer/user must
ensure that the output power lines are labeled properly as to the safety hazards and that any inadvertent
contact with hazardous voltages is eliminated.
Guard against risks of electrical shock during open cover checks by not touching any portion of the
electrical circuits. Even when power is off, capacitors may retain an electrical charge. Use safety
glasses during open cover checks to avoid personal injury by any sudden component failure.
Neither AMETEK Programmable Power Inc., San Diego, California, USA, nor any of the subsidiary
sales organizations can accept any responsibility for personnel, material or inconsequential injury, loss
or damage that results from improper use of the equipment and accessories.

User Manual 2253i / 2253iX
AMETEK California Instruments 5
SAFETY SYMBOLS

User Manual 2253i / 2253iX
AMETEK California Instruments 6
WARRANTY TERMS
AMETEK Programmable Power, Inc. (“AMETEK”), provides this written warranty covering the
Product stated above, and if the Buyer discovers and notifies AMETEK in writing of any defect in
material or workmanship within the applicable warranty period stated above, then AMETEK may, at
its option: repair or replace the Product; or issue a credit note for the defective Product; or provide the
Buyer with replacement parts for the Product.
The Buyer will, at its expense, return the defective Product or parts thereof to AMETEK in
accordance with the return procedure specified below. AMETEK will, at its expense, deliver the
repaired or replaced Product or parts to the Buyer. Any warranty of AMETEK will not apply if the
Buyer is in default under the Purchase Order Agreement or where the Product or any part thereof:
• is damaged by misuse, accident, negligence or failure to maintain the same as s ecified or
required by AMETEK;
• is damaged by modifications, alterations or attachments thereto which are not authorized by
AMETEK;
• is installed or o erated contrary to the instructions of AMETEK;
• is o ened, modified or disassembled in any way without AMETEK’s consent; or
• is used in combination with items, articles or materials not authorized by AMETEK.
The Buyer may not assert any claim that the Products are not in conformity with any warranty until
the Buyer has made all payments to AMETEK provided for in the Purchase Order Agreement.
PRODUCT RETURN PROCEDURE
Request a Return Material Authorization (RMA) number from the re air facility (must be done in the
country in which it was purchased):
• In the USA, contact the AMETEK Re air De artment rior to the return of the roduct to
AMETEK for re air:
Tele hone: 800-733-5427, ext. 2295 or ext. 2463 (toll free North America)
858-450-0085, ext. 2295 or ext. 2463 (direct)
• Outside the United States, contact the nearest Authorized Service Center (ASC). A full listing
can be found either through your local distributor or our website,
www. rogrammable ower.com, by clicking Su ort and going to the Service Centers tab.
When requesting an RMA, have the following information ready:
• Model number
• Serial number
• Descri tion of the roblem
NOTE: Unauthorized returns will not be accepted and will be returned at the shipper’s
expense.
NOTE: A returned product found upon inspection by AMETEK, to be in specification is
subject to an evaluation fee and applicable freight charges.

User Manual 2253i / 2253iX
AMETEK California Instruments 7
Table of Contents
1. Introduction ............................................................................................................................................. 11
1.1 General Description ..........................................................................................................................................11
1.2 iX and i Model Differences ................................................................................................................................12
1.3 Manual organization and format........................................................................................................................12
2. Specifications .......................................................................................................................................... 13
2.1 Electrical ...........................................................................................................................................................13
2.2 Mechanical ........................................................................................................................................................23
2.3 Environmental ...................................................................................................................................................24
2.4 Regulatory.........................................................................................................................................................24
2.5 Front Panel Controls, Indicators and Display....................................................................................................25
2.6 Special Features ...............................................................................................................................................26
2.7 Available Options – i Series ..............................................................................................................................27
2.8 Available Options – iX Series............................................................................................................................28
2.9 EXT Option - Supplemental Specifications .......................................................................................................29
2.10 LKM / LKS Options - Supplemental Specifications ...........................................................................................31
2.11 RPF Option - Supplemental Specifications.......................................................................................................31
2.12 WHM Option - Supplemental Specification.......................................................................................................31
2.13 Supplemental Specifications.............................................................................................................................32
3. Unpacking and Installation....................................................................................................................... 34
3.1 Unpacking .........................................................................................................................................................34
3.2 AC Input Power Requirements..........................................................................................................................34
3.3 Mechanical Installation......................................................................................................................................34
3.4 Rear Panel Connectors.....................................................................................................................................36
3.5 AC Input Wiring - INPUT...................................................................................................................................37
3.6 Output Connections ..........................................................................................................................................38
3.7 Connectors - Rear Panel...................................................................................................................................40
3.8 Basic Initial Functional Test ..............................................................................................................................46
3.9 Clock and Lock Mode (-LKM/-LKS Option) .......................................................................................................48
3.10 Remote Control Interfaces ................................................................................................................................49
4. Front Panel Operation ............................................................................................................................. 50
4.1 Tour of the Front Panel .....................................................................................................................................50
4.2 Menu Structure..................................................................................................................................................55
4.3 Output Programming.........................................................................................................................................79
4.4 Waveform Management....................................................................................................................................81
4.5 Measurements ..................................................................................................................................................84
4.6 Harmonic Analysis ............................................................................................................................................85
4.7 Transient Programming.....................................................................................................................................85
4.8 Setting the Power-on Initialization Values.........................................................................................................90
4.9 Remote Inhibit Function ....................................................................................................................................91
5. Principle of Operation .............................................................................................................................. 92
5.1 Overall Description............................................................................................................................................92
5.2 Amplifier Assemblies.........................................................................................................................................92
5.3 PFC and Rectifier Assembly .............................................................................................................................92
5.4 EMI Filter Assembly ..........................................................................................................................................92
5.5 Auxiliary DC bias Supply ...................................................................................................................................92
5.6 Range/Relay Assembly.....................................................................................................................................93
5.7 Interface Assembly ...........................................................................................................................................93
5.8 Front Panel Assembly .......................................................................................................................................93

User Manual 2253i / 2253iX
AMETEK California Instruments 8
6. Calibration............................................................................................................................................... 95
6.1 Recommended Calibration Equipment .............................................................................................................95
6.2 Calibration Screens...........................................................................................................................................95
6.3 Measurement Calibration ..................................................................................................................................95
6.4 Non-Routine Output Calibration ........................................................................................................................97
6.5 Non-Routine Output Offset and Gain Calibration..............................................................................................98
7. Service.................................................................................................................................................. 100
7.1 Cleaning ..........................................................................................................................................................100
7.2 General ...........................................................................................................................................................100
7.3 Basic operation ...............................................................................................................................................100
7.4 Self test ...........................................................................................................................................................102
7.5 Advanced Troubleshooting. ............................................................................................................................102
7.6 Amplifier Module Data.....................................................................................................................................103
7.7 Factory Assistance..........................................................................................................................................105
7.8 Fuses ..............................................................................................................................................................105
7.9 Replaceable Parts...........................................................................................................................................106
8. Miscellaneous Options .......................................................................................................................... 108
8.1 IEEE488 Interface (-GPIB)..............................................................................................................................108
8.2 Atlas Based Language Extensions (-ABL) ......................................................................................................108
8.3 External Sync (-EXS) ......................................................................................................................................108
8.4 External Input (-EXT).......................................................................................................................................109
8.5 RPV Input (-RPV)............................................................................................................................................110
8.6 Ethernet Interface (-LAN)................................................................................................................................110
8.7 Clock and Lock (–LKM / -LKS)........................................................................................................................110
8.8 Rack Mount Slides (-RMS)..............................................................................................................................111
9. Option -160: RTCA / DO-160 Rev D, E.................................................................................................. 112
9.1 General ...........................................................................................................................................................112
9.2 Initial Setup .....................................................................................................................................................112
9.3 Available DO160 Tests ...................................................................................................................................113
9.4 Front Panel Operation -160.............................................................................................................................114
9.5 AC Test Mode .................................................................................................................................................115
9.6 DC Test Mode .................................................................................................................................................128
10. Option -704: MIL-STD 704 Rev D & E (MIL704 Mode) ........................................................................... 132
10.1 General ...........................................................................................................................................................132
10.2 Initial Setup .....................................................................................................................................................132
10.3 Test Revision ..................................................................................................................................................132
10.4 Available MIL-STD 704 Tests..........................................................................................................................133
10.5 Front Panel Operation MIL704........................................................................................................................134
10.6 AC Test Mode .................................................................................................................................................135
10.7 DC Test Mode .................................................................................................................................................142
11. Option –ABD: Airbus ABD0100.1.8 Test ................................................................................................ 146
12. Option –A350: Airbus ABD0100.1.8.1 Test ............................................................................................ 147
13. Option –AMD: Airbus AMD24 Test......................................................................................................... 148
14. Option –B787: Boeing B787-0147 Test .................................................................................................. 149
15. Option –WHM: Watt Hour Meter measurements.................................................................................... 150
16. Error Messages..................................................................................................................................... 151
17. Index..................................................................................................................................................... 156

User Manual 2253i / 2253iX
AMETEK California Instruments 9
List of Figures
Figure 1-1: Model 2253iX AC Source. ..................................................................................................................................11
Figure 2-1: 2253i / iX Voltage / Current Rating Chart for 150V AC Range per phase – 230Vac in. .....................................17
Figure 2-2: 2253i / iX Voltage / Current Rating Chart for 300V AC Range per phase – 230Vac in. .....................................17
Figure 2-3: 2253i / iX Voltage / Current Rating Chart for 150V AC Range per phase – 115Vac in ......................................18
Figure 2-4: 2253i / iX Voltage / Current Rating Chart for 300V AC Range per phase – 115Vac in ......................................18
Figure 2-5: 2253i / iX Voltage / Current Rating Chart for 200V DC Range per phase. .........................................................19
Figure 2-6: 2253i / iX Voltage / Current Rating Chart for 400V DC Range per phase. .........................................................19
Figure 2-7: EXT Option Frequency response 300VAC Range. ............................................................................................30
Figure 2-8: Typical frequency response, low Vrange, ALC off..............................................................................................32
Figure 3-1: Rack Mount Slides (-RMS option) position .........................................................................................................35
Figure 3-2: Rear Panel Connector Locations – i Models ......................................................................................................36
Figure 3-3: Rear Panel Connector Locations – iX Models (Shown with –LAN option)..........................................................36
Figure 3-4: USB Connector pin orientation. ..........................................................................................................................43
Figure 3-5: Functional Test Setup.........................................................................................................................................47
Figure 3-6: Clock and Lock Connections ..............................................................................................................................48
Figure 4-1: Front Panel controls and indicators. ...................................................................................................................50
Figure 4-2: Shuttle Knob .......................................................................................................................................................52
Figure 4-3: Menu Keys..........................................................................................................................................................53
Figure 4-4: Measurement Screen .........................................................................................................................................54
Figure 4-5: PROGRAM Menu ...............................................................................................................................................60
Figure 4-6: CONTROL Menus ..............................................................................................................................................62
Figure 4-7: MEASUREMENT Screen....................................................................................................................................65
Figure 4-8: Selecting a Waveform ........................................................................................................................................81
Figure 4-9: Waveform Crest Factor Affects Max. rms Voltage .............................................................................................82
Figure 4-10: Pulse Transients...............................................................................................................................................86
Figure 4-11: List Transients ..................................................................................................................................................86
Figure 4-12: Sample Transient Output Sequence ................................................................................................................87
Figure 4-13: Switching Waveforms in a Transient List..........................................................................................................88
Figure 4-14: TRANSIENT Menu............................................................................................................................................88
Figure 6-1: Internal adjustment locations..............................................................................................................................99
Figure 8-1: Rack Mount Slides (-RMS option) position .......................................................................................................111
Figure 9-1: Application Menu ..............................................................................................................................................114
Figure 9-2: DO160 Main Menus..........................................................................................................................................114
Figure 9-3: Normal state screens........................................................................................................................................115
Figure 9-4: Voltage Modulation - Frequency characteristics...............................................................................................118
Figure 9-5: Frequency Modulation ......................................................................................................................................119
Figure 9-6: Power Interrupt .................................................................................................................................................120
Figure 9-7: Power Interrupt for Group2/A (NF) and Group3/A(WF) ....................................................................................121
Figure 9-8: Emergency Screens .........................................................................................................................................123
Figure 9-9: Abnormal Screen..............................................................................................................................................125
Figure 9-10: Normal State screens .....................................................................................................................................128
Figure 9-11: Abnormal State screens .................................................................................................................................130
Figure 10-1: Applications Menu ..........................................................................................................................................134
Figure 10-2: MIL704 Menu..................................................................................................................................................134
Figure 10-3: Steady State Menu .........................................................................................................................................135
Figure 10-4: Emergency Menu............................................................................................................................................139
Figure 10-5: Abnormal Screens ..........................................................................................................................................140
Figure 10-6: Emergency Test .............................................................................................................................................145

User Manual 2253i / 2253iX
AMETEK California Instruments 10
List of Tables
Table 3-1: Output Terminal connections...............................................................................................................................39
Table 3-2: Rear Panel Connectors .......................................................................................................................................40
Table 3-3: AC Line Input Terminal block...............................................................................................................................41
Table 3-4: Output Terminal connections...............................................................................................................................41
Table 3-5: External Sense connector....................................................................................................................................41
Table 3-6: DB15 Auxiliary I/O Connector ..............................................................................................................................42
Table 3-7: BNC Connectors..................................................................................................................................................42
Table 3-8: USB Connector pin out. .......................................................................................................................................43
Table 3-9: RS232 Connector pin out. ...................................................................................................................................43
Table 3-10: GPIB Interface Connector pin out......................................................................................................................44
Table 3-11: RJ45 LAN Connector pin out. ............................................................................................................................45
Table 3-12: Load Resistance ................................................................................................................................................47
Table 4-1: Menu Tree............................................................................................................................................................59
Table 4-2: Sample Transient List ..........................................................................................................................................88
Table 4-3: Factory Default Power on Settings ......................................................................................................................90
Table 4-4: Remote Inhibit Modes..........................................................................................................................................91
Table 6-1: Calibration Load Values.......................................................................................................................................96
Table 6-2: Output Calibration Coefficients - Factory Defaults...............................................................................................97
Table 6-3: Adjustment pot reference by phase. ....................................................................................................................98
Table 7-1: Replaceable Parts and Assemblies ...................................................................................................................107
Table 9-1: Normal Voltage and Frequency minimum .........................................................................................................116
Table 9-2: Normal Voltage and Frequency Maximum .........................................................................................................116
Table 9-3: Normal Voltage Unbalance ................................................................................................................................117
Table 9-4: Airbus mode voltage modulation. ......................................................................................................................117
Table 9-5: Normal VoltageSurge Sequence .......................................................................................................................121
Table 9-6: Normal Frequency Transient Sequence ............................................................................................................122
Table 9-7: Normal Frequency Variation Sequence .............................................................................................................122
Table 9-8: Emergency Voltage and Frequency Minimum ...................................................................................................123
Table 9-9: Emergency Voltage and Frequency Maximum ..................................................................................................123
Table 9-10: Emergency Voltage Unbalance .......................................................................................................................124
Table 9-11: Abnormal Voltage Minimum.............................................................................................................................125
Table 9-12: Abnormal Voltage Maximum............................................................................................................................125
Table 9-13: Abnormal Voltage Unbalance ..........................................................................................................................126
Table 9-14: Abnormal Frequency Transient........................................................................................................................127
Table 9-15: Normal Voltage Minimum.................................................................................................................................128
Table 9-16: Normal Voltage Maximum................................................................................................................................129
Table 9-17: Voltage Surge ..................................................................................................................................................129
Table 9-18: Abnormal Voltage Surge..................................................................................................................................131
Table 10-1: Steady state voltage ........................................................................................................................................135
Table 10-2: Steady state frequency ....................................................................................................................................136
Table 10-3: Frequency Modulation .....................................................................................................................................136
Table 10-4: Abnormal Over Frequency...............................................................................................................................141
Table 10-5: Abnormal Under Frequency.............................................................................................................................141
Table 16-1: Error Messages................................................................................................................................................155

User Manual 2253i / 2253iX
AMETEK California Instruments 11
1. Introduction
This instruction manual (P/N 6005-962) contains information on the installation, operation, calibration
and maintenance of the model 2253i and model 2253iX AC power sources.
Figure 1-1: Model 2253iX AC Source.
1.1 General Description
The Compact i/iX Series of AC Power Source is a family of high efficiency, rack mountable, AC Power
Sources that provide a precisely controlled output voltage with low distortion and measurements. In
addition, the unit provides measurements of voltage and current, and the iX models offer extensive
power analyzer capabilities with easy to use interface software. Standard output voltage ranges are
150 Vac and 300 Vac RMS. The 2253i/iX models operate in three-phase mode and provide a
maximum output power of 750VA per phase. A –MODE option is available which parallels all three
outputs in a single-phase mode of operation. A unique constant power mode allows for higher output
current at less than full-scale voltage effectively increasing the usability for many applications where
otherwise a higher power level AC source may be needed.
Read the installation instructions carefully before attempting to install and operate the Compact i/iX
Series power source.

User Manual 2253i / 2253iX
AMETEK California Instruments 12
1.2 iX and i Model Differences
The 2253iX offers additional features and functions over the 2253i model. Some of the features
available on the 2253iX such as the GPIB interface may be added as an option to the 2253i at the time
of order. Other features are exclusive to the 2253iX models.
Both models are based on the same AC power source hardware platform and share many common
components. The differences are primarily in configuration and options. This manual covers both
models. Some menus and screen shown in this manual may not apply to i model AC sources.
All 2253i/iX models are equipped with a USB and RS232 interface. The 2253iX also includes a GPIB
interface. The GPIB interface can be specified as an option on the 2253i models at the time of order.
An optional Ethernet interface (-LAN) is available on the 2253iX model only.
1.3 Manual organization and format
All user documentation for California Instruments power sources is provided on CDROM in electronic
format. (Adobe Portable Document Format) The required Adobe PDF viewer is supplied on the same
CDROM. This manual may be printed for personal use if a hardcopy is desired. To request a hardcopy
from AMETEK Programmable Power, contact customer service at [e-mail] .
There will be an additional charge for printed manuals.
This manual contains sections on installation, normal use, maintenance and calibration.
Refer to the iX Compact Series Programming manual for information on using the remote control
interface and command syntax. The programming manual (P/N 6005-961) is provided on the same
CDROM as this user manual.
AMETEK Programmable Power may make updated versions of this manual available from time to time
in electronic format through it’s website. To obtain an updated manual revision if available, check the
the AMETEK Programmable Power Manual download page at programmablepower.com . You need to
register as a customer to obtain free access to manual and software downloads.

User Manual 2253i / 2253iX
AMETEK California Instruments 13
2. Specifications
Specifications shown are valid over an ambient temperature range of 25 ±5°C and apply after a 30
minute warm-up time. Unless otherwise noted, all specifications are per phase for sine wave output
into a resistive load. For three phase configurations or mode of operation, all specifications are for Line
to Neutral (L-N) and phase angle specifications are valid under balanced load conditions only.
Specifications for 2253i models are identical to those for the 2253iX except where noted.
2.1 Electrical
2.1.1 Input
Parameter Specification
Line Voltage:
(single phase, 2 wire +
ground (PE))
115 to 230 VAC ± 10 %
Line VA: 2940 VA / 2850 W
Line Current at nominal
input voltage:
< 20 Arms @ 115V and 1500 VA output
(Note: Max. AC input current limited to 20 Arms.
Breaker may trip above 1500 VA output power)
< 15 Arms @ 230V and 2250 VA output
Line Current at low line
input voltage, full power:
< 20 Arms @ 103.5V (Derated output power)
< 17 Arms @ 207V (Full output power)
Line Frequency: 47-63 Hz
Efficiency: 77 % (typical @ full load)
Power Factor: 0.98 (typical @ full load)
Inrush Current: < 160 Apk for less than 2 ms at 230V + 10% AC input
< 80 Apk for less than 2 ms at 115V + 10% AC input
Hold-Up Time: > 10 ms
Isolation Voltage: 1350 VAC input to output
1350 VAC input to chassis

User Manual 2253i / 2253iX
AMETEK California Instruments 14
2.1.2 Output
Output Parameter Specification
Model 2253i 2253iX
Modes AC, DC AC, DC, AC+DC
No of Outputs 3 standard
1 or 3 with –MODE option
Voltage
Ranges (L-N):
AC, AC+DC Mode
Low Vrange: 0 - 150 Vrms
High Vrange: 0 - 300 Vrms
DC Mode
Low Vrange: 0 - 200 Vdc
High Vrange: 0 - 400 Vdc
Programming Resolution: 0.1 V
Accuracy:
(ALC mode ON)
0.1% FS
1
(from 5V to FS
1
)
Distortion THD
2
: < 1 % 16 - 1000 Hz
(harmonics and noise to 300 kHz)
Load Regulation:
(ALC mode ON)
0.1 % FS
1
(At external sense connection with ext sense mode programmed.)
Voltage Sense modes: Internal
External
External Sense Up to 3 % of set voltage can be dropped across each load lead.
Line Regulation: 0.02% for 10% input line change
DC Offset Voltage:
(In AC mode)
< 20.0 mV
Output Noise:
(20 kHz to 1 MHz, full R load)
< 100 mV
RMS
– 150V / 200V Range
< 200 mV
RMS
– 300V / 400V Range
Output Coupling Direct coupled
Output Impedance (Z) (@
max current)
Z = Vrange * 0.001 / I_load
Current (with 200 – 230 VAC line input)
Output Mode 3 Phase 1 Phase (-Mode)
AC Mode
High Voltage range 2.5 Arms @ 300 V
3.25 Arms @ 230 V
7.5 Arms @ 300 V
9.74 Arms @ 230 V
Low Voltage range 5.0 Arms @ 150 V
6.5 Arms @ 115 V
15.0 Arms @ 150 V
19.5 Arms @ 115 V
1
FS (Full Scale) refers to highest available range, e.g. 300Vac in AC mode, 400Vdc in DC mode.
2
The distortion specification applies at 77% voltage range, max current and resistive load conditions.

User Manual 2253i / 2253iX
AMETEK California Instruments 15
Output Parameter Specification
DC Mode
High Voltage range 1.25 Adc @ 400 V
1.63 Adc @ 300 V
3.75 Adc @ 400 V
4.88 Adc @ 300 V
Low Voltage range 2.5 Adc @ 200 V
3.25 Adc @ 150 V
7.5 Adc @ 200 V
9.74 Adc @ 150 V
AC+DC Mode
High Voltage range 1.25 Arms @ 300 V
1.63 Arms @ 230 V
3.75 Arms @ 300 V
4.88 Arms @ 230 V
Low Voltage range 2.5 Arms @ 150 V
3.25 Arms @ 115 V
7.5 Arms @ 150 V
9.74 Arms @ 115 V
Current Limit mode Programmable, CC or CV mode
Note: Constant power mode allows higher current at reduced voltage. Maximum current available at 77% of
voltage range. See Figure 2-1 through Figure 2-6 for voltage versus current profiles by model and
voltage range.
Note: Full power output available only when using 208-230 AC nominal input line. For 100-115V AC input
operation, maximum output power and current are limited by maximum input current of 20 A.
Maximum AC Peak Current
Model 3 Phase 1 Phase (-Mode)
AC mode, High Vrange
AC mode, Low Vrange
10 Apk
20 Apk
30 Apk
60 Apk
Crest Factor AC Current
Maximum CF at full scale
voltage rms current
4:1
Power
Model 3 Phase 1 Phase (-Mode)
AC Mode (208 – 230V
nominal AC input)
750 VA 2250 VA
AC Mode (100-115V
nominal AC input)
500 VA 1500 VA
DC Mode 500 W 1500 W
AC+DC Mode 375 VA 1125 VA
Frequency
Range: 16 Hz - 1000 Hz
Resolution
1
: 0.01 Hz [< 81.91 Hz]
0.1 Hz [> 82.0 to 819.1 Hz]
1 Hz [> 819 Hz]
Accuracy: ± 0.025 % ±0.15% for FC option
Temp. Coefficient ± 5 ppm of value / °C
Stability: ± 15 ppm of value
1
Programming resolution reduced if –LKM/-LKS option is installed. See paragraph 2.9.

User Manual 2253i / 2253iX
AMETEK California Instruments 16
Note: All output specifications apply below the Current / Voltage rating line shown in the V/I
rating charts of section 2.1.2.1 through 2.1.2.3. Data is shown for three-phase mode. For
–MODE option, multiply current by 3.

User Manual 2253i / 2253iX
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2.1.2.1 Voltage versus Current Rating Charts – AC Mode – 230V AC input
Figure 2-1: 2253i / iX Voltage / Current Rating Chart for 150V AC Range per phase – 230Vac in.
Figure 2-2: 2253i / iX Voltage / Current Rating Chart for 300V AC Range per phase – 230Vac in.

User Manual 2253i / 2253iX
AMETEK California Instruments 18
2.1.2.2 Voltage versus Current Rating Charts – AC Mode – 115V AC input
2253i/iX Voltage Current Profile - AC Low Vrange - 115V AC input
0.00
1.00
2.00
3.00
4.00
5.00
6.00
7.00
0 25 50 75 100 125 150
Vrms
Irms
Figure 2-3: 2253i / iX Voltage / Current Rating Chart for 150V AC Range per phase – 115Vac in
2253i/iX Voltage Current Profile - AC High Vrange - 115V AC input
0.00
0.50
1.00
1.50
2.00
2.50
3.00
3.50
0 50 100 150 200 250 300
Vrms
Irms
Figure 2-4: 2253i / iX Voltage / Current Rating Chart for 300V AC Range per phase – 115Vac in

User Manual 2253i / 2253iX
AMETEK California Instruments 19
2.1.2.3 Voltage versus Current Rating Charts – DC Mode
2253i/iX Voltage Current Profile - DC Low Vrange
0.00
0.50
1.00
1.50
2.00
2.50
3.00
3.50
0 25 50 75 100 125 150 175 200
Vdc
Idc
Figure 2-5: 2253i / iX Voltage / Current Rating Chart for 200V DC Range per phase.
2253i/iX Voltage Current Profile - DC High Vrange
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
0 50 100 150 200 250 300 350 400
Vdc
Idc
Figure 2-6: 2253i / iX Voltage / Current Rating Chart for 400V DC Range per phase.

User Manual 2253i / 2253iX
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2.1.3 Measurements
Measurement specifications apply to single chassis AC sources. See notes for other models and
configurations.
Parameter Range Accuracy (±% FS) Resolution
Frequency
1
16.00-1000.0 Hz
0.1 % 0.01 Hz to 81.91 Hz
0.1 Hz to 819.1 Hz
1 Hz > 819.1 Hz
Voltage 0 - 400 Volts 0.1 % 0.01 Volt
Phase angle 0 – 360° 0.5° 0.1°
Current 0 – 15 Amps 0.5 % 0.001 Amp
Peak Current 0 - 60 Amps 0.5 % 0.001 Amp
Crest Factor 1.00 –10.00 1.5 % 0.01
VA Power 0 - 4 KVA 0.5 % 1 VA
Real Power 0 - 4 KW 0.5 % 1 W
Power Factor 0.00 - 1.00 1 % 0.01
Note: Accuracy specifications are valid above 100 counts. For multi-chassis configurations, Current
and Power range and accuracy specifications are times the number of chassis.
Note: Frequency measurement specification valid for output > 20 Vrms.
Note: Crest Factor accuracy applies for Irms > 50% of max.
Note: Power Factor accuracy applies for PF > 0.5 and VA > 50% of max.
2.1.4 Harmonic Measurements
Harmonic measurement specifications apply to 2253iX model AC sources only.
Parameter Range Accuracy (±% FS) Resolution
Frequency fundamental 16.00 - 81.91 Hz
82.0 - 819.1 Hz
> 819.1 Hz
0.1% 0.01 Hz
0.1 Hz
1 Hz
Frequency harmonics 16.00 Hz – 48 kHz 0.5% 0.1 Hz
Phase -180° – 180° 2° + 5°/kHz 0.1°
Voltage
Fundamental 0 - 400 Volts 0.5% 0.01V
Harmonic 2 - 50 0.5% + 0.5%/kHz 0.01V
Current
2
Fundamental 0 - 15 Amps 0.5% 0.01A
Harmonic 3 - 50 0.5% + 0.5%/kHz 0.01A
Note: For multi-chassis configurations, current accuracy specifications are times the number of
chassis.
1
Frequency measurement specifications valid with output voltage of 20Vrms or higher. If output relay is open, frequency
measurement will return 0.0 Hz.
2
Second current harmonic measurement value not included.