Tektronix PWS2185 Use and care manual

xx
PWS2185, PWS2323, PWS2326, and PWS2721
Linear DC Power Supplies
Specifications and Performance Verification
ZZZ
Technical Reference
*P077048200*
077-0482-00

PWS2185, PWS2323, PWS2326, and PWS2721
Linear DC Power Supplies
Specifications and Performance Verification
ZZZ
Technical Reference
xx
Warning
The servicing instructions are for use by qualified personnel
only. To avoid personal injury, do not perform any servicing
unless you are qualified to do so. Refer to all safety summaries
before performing service.
www.tektronix.com
077-0482-00

Copyright © Tektronix. All rights reserved. Licensed software products are owned by Tektronix or its subsidiaries
or suppliers, and are protected by national copyright laws and international treaty provisions.
Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication
supersedes that in all previously published material. Specifications and price change privileges reserved.
TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.
Contacting Tektronix
Tektronix, Inc.
14150 SW Karl Braun Drive
P.O. Box 500
Beaverton, OR 97077
USA
For product information, sales, service, and technical support:
In North America, call 1-800-833-9200.
Worldwide, visit www.tektronix.com to find contacts in your area.

Table of Contents
General Safety Summary ......................................................................................... iii
Specifications ....................................................................................................... 1
Performance Verification .......................................................................................... 5
Test Record ..................................................................................................... 6
Performance Verification Procedures....................................................................... 12
PWS2000 Series Specifications and Performance Verification i

Table of Contents
List of Tables
Table 1: Specifications............................................................................................. 1
Table 2: Mains power characteristics ............................................................................ 3
Table 3: Mechanical characteristics .............................................................................. 3
Table 4: Environment performance............................................................................... 4
Table 5: Keypad special operations .............................................................................. 4
Table 6: DC voltage accuracy..................................................................................... 7
Table 7: DC voltage readback accuracy ......................................................................... 8
Table 8: DC voltage line regulation .............................................................................. 8
Table 9: DC voltage load regulation.............................................................................. 9
Table 10: DC current accuracy.................................................................................... 9
Table 11: DC current readback accuracy ....................................................................... 10
Table 12: Voltage noise at 20 MHz.............................................................................. 11
Table 13: Current noise at 20 MHz.............................................................................. 11
Table 14: Test equipment......................................................................................... 12
ii PWS2000 Series Specifications and Performance Verification

General Safety Summary
General SafetySummary
Review the following safety precautions to avoid injury and prevent damage to
this product or any products connected to it.
To avoid potential hazards, use this product only as specified.
Only qualified personnel should perform service procedures.
To Avoid Fire or Personal
Injury
Use proper power cord. Use only the power cord specified for this product and
certified for the country of use.
Use proper voltage setting. Before applying power, ensure that the line selector
is in the proper position for the source being used.
Ground the product. This product is grounded through the grounding conductor
of the power cord. To avoid electric shock, the grounding conductor must be
connected to earth ground. Before making connections to the input or output
terminals of the product, ensure that the product is properly grounded.
Observe all terminal ratings. To avoid fire or shock hazard, observe all ratings
and markings on the product. Consult the product manual for further ratings
information before making connections to the product.
Power disconnect. The power switch disconnects the product from the power
source. See instructions for the location. Do not block the power switch; it must
remain accessible to the user at all times.
Do not operate without covers. Do not operate this product with covers or panels
removed.
Do not operate with suspected failures. If you suspect that there is damage to this
product, have it inspected by qualified service personnel.
Avoid exposed circuitry. Do not touch exposed connections and components when
power is present.
Use proper fuse. Use only the fuse type and rating specified for this product.
Do not operate in wet/damp conditions.
Do not operate in an explosive atmosphere.
Keep product surfaces clean and dry.
Provide proper ventilation. Refer to the manual's installation instructions for details
on installing the product so it has proper ventilation.
PWS2000 Series Specifications and Performance Verification iii

General Safety Summary
TermsinThisManual These terms may appear in this manual:
WARNING. Warning statements identify conditions or practices that could result
in injury or loss of life.
CAUTION. Caution statements identify conditions or practices that could result in
damage to this product or other property.
Symbols and Terms on the
Product
These terms may appear on the product:
DANGER indicates an injury hazard immediately accessible as you read
the marking.
WARN ING indicates an injury hazard not immediately accessible as you
read the marking.
CAUTION indicates a hazard to property including the product.
The following symbol(s) may appear on the product:
iv PWS2000 Series Specifications and Performance Verification

Specifications
This section contains specifications for the PWS2000 series instruments. All
specifications are guaranteed unless noted as "typical." Typical specifications are
provided for your convenience but are not guaranteed. Specifications that are
marked with the symbol are checked in Performance Verification.
Table 1: Specifications
Parameter PWS2185 PWS2323 PWS2326 PWS2721
Constant voltage
operation, nominal
The unit may be set to a constant voltage over a range of currents
Voltage range
This is the range
over which the
output voltage is
adjustable
0to18V 0to32V 0to32V 0to72V
Voltage resolution,
nominal
10 mV
Voltage setting
accuracy
At 25 °C ±5 °C
±(0.05% of settling + 10 mV)
Current limit,
nominal
Defined by the constant current setting. The changeover is automatic.
Voltage
temperature
coefficient, typical
±(0.02% + 5 mV) per °C outside the 25 °C ±5 °C standard range
Constant current
operation, nominal
The unit may be set to a constant current over a range of voltages
Current range
This is the range
over which the
output current is
adjustable
0Ato5A 0Ato3A 0Ato6A 0Ato1.5A
Current resolution,
nominal
10 mA
Current setting
accuracy
At 25 °C ±5 °C
±(0.2% + 10 mA)
Defined by the constant voltage setting. The changeover is automatic.
Voltage limit,
nominal 0to 18 V 0to 32 V 0to 32 V 0to 72 V
Current
temperature
coefficient, typical
±(0.1% + 5 mA) per °C outside the 25 °C ±5 °C standard range
Meter, nominal Internal measurement capability. Voltage and current are measured internally.
PWS2000 Series Specifications and Performance Verification 1

Specifications
Table 1: Specifications (cont.)
Parameter PWS2185 PWS2323 PWS2326 PWS2721
Current readback
resolution, nominal
10 mA
Current
readback accuracy
At 25 °C ±5 °C
±(0.1% of reading + 15 mA)
Current readback
temperature
coefficient, typical
±(0.1% + 15 mA) per °C outside the 25 °C ±5 °C standard range
Voltage
readback accuracy
At 25 °C ±5 °C
±(0.05% of reading +
15 mV)
±(0.05% of reading +
15 mV) when VSET <
20 V
±(0.05% of reading +
120 mV) when VSET ≥
20 V
±(0.05% of reading +
15 mV) when VSET <
20 V
±(0.05% of reading +
120 mV) when VSET ≥
20 V
±(0.05% of reading +
15 mV) when VSET <
20 V
±(0.05% of reading +
120 mV) when VSET ≥
20 V
Voltage readback
resolution, nominal
10 mV 10 mV when VSET <
20 V
100 mV when VSET ≥
20 V
10 mV when VSET <
20 V
100 mV when VSET ≥
20 V
10 mV when VSET <
20 V
100 mV when VSET ≥
20 V
Voltage readback
temperature
coefficient, typical
±(0.02% of reading + 15 mV) per °C outside the 25 °C ±5 °C standard range
Maximum input
VArms,typical
350 VA 350 VA 700 VA 350 VA
Line regulation
– voltage
Change over the full rated input voltage: ±(0.1% + 5 mV)
Line regulation –
current, typical
Change over the full rated input voltage: ±(0.1% + 2 mA)
Load regulation
– voltage
Change from 0 to 100%
FS; ±(0.02% + 5 mV)
Change from 0 to 100%
FS; ±(0.02% + 5 mV)
Change from 0 to 100%
FS; ±(0.04% + 6 mV)
Change from 0 to 100%
FS; ±(0.02% + 4 mV)
Load regulation –
current, typical
Change from 10 to 90% FS; ±(0.1% + 2 mA)
Voltage ripple,
20 MHz bandwidth
<2mV
rms and 20 mVp-p
<1.5mV
rms and 12 mVp-p,typical
Voltage ripple,
7 MHz bandwidth
<1mV
rms and 3 mVp-p
Current ripple,
20 MHz bandwidth
<5mA
rms
Isolation voltage The product can operate properly with up to 100 VDC + pk AC between the Earth Ground terminal and any
other terminal with AC limited to 3 Vp-p maximum and 60 Hz maximum.
Setup memory,
nominal
20 setup locations
Software voltage
limit
The maximum settable voltage (MAX VOLT) menu entry, when set below the hardware maximum voltage limit,
disallows adjusting the instrument to voltages more than the MAX VOLT limit.
2 PWS2000 Series Specifications and Performance Verification