Stanford Research Systems DC205 Operation manual
Operation and Service Manual
Precision DC Voltage Source
DC205
Stanford Research Systems
Revision 0.30 •February 22, 2019
Certification
Stanford Research Systems certifies that this product met its published specifications at the time
of shipment.
Warranty
This Stanford Research Systems product is warranted against defects in materials and workman-
ship for a period of one (1) year from the date of shipment.
Service
For warranty service or repair, this product must be returned to a Stanford Research Systems
authorized service facility. Contact Stanford Research Systems or an authorized representative
before returning this product for repair.
Information in this document is subject to change without notice.
Copyright c
Stanford Research Systems, Inc., 2019. All rights reserved.
Stanford Research Systems, Inc.
1290–D Reamwood Avenue
Sunnyvale, CA 94089 USA
Phone: (408) 744-9040 •Fax: (408) 744-9049
Printed in U.S.A. Document number 9-01745-903
DC205 Precision DC Voltage Source
Contents
General Information iii
Safety and Preparation for Use ................ iii
Symbols ............................. iv
Notation ............................. v
Specifications .......................... vi
1 Getting Started 1 – 1
1.1 How to use this manual ................. 1–2
1.2 Preliminaries ........................ 1–2
1.2.1 Equipment needed ................ 1–2
1.3 First example: turning on the instrument ....... 1–2
1.4 User interface ....................... 1–4
1.5 Instrument settings .................... 1–5
1.5.1 Sense ........................ 1–5
1.5.2 Isolation ...................... 1–6
1.5.3 Scanning ...................... 1–7
1.6 Interlock .......................... 1–10
2 Operation 2 – 1
2.1 Navigating the front panel ................ 2–2
2.1.1 Power ....................... 2–2
2.1.2 Range ....................... 2–4
2.1.3 Select /Adjust ................... 2–4
2.1.4 Numeric Entry .................. 2–5
2.1.5 Sense ........................ 2–6
2.1.6 Config ....................... 2–6
2.1.7 Scan ........................ 2–7
2.1.8 Output ....................... 2–7
2.1.9 Status ........................ 2–8
2.1.10 Source Out ..................... 2–8
2.2 Theory of operation .................... 2–10
2.3 Scanning .......................... 2–10
2.4 Error messages ...................... 2–10
3 Remote Operation 3 – 1
3.1 Index of commands .................... 3–2
3.2 Alphabetic list of commands ............... 3–4
i
ii Contents
3.3 Introduction ........................ 3–6
3.3.1 Interface configuration .............. 3–6
3.3.2 Buffers ....................... 3–6
3.4 Commands ......................... 3–7
3.4.1 Command syntax ................. 3–7
3.4.2 Notation ...................... 3–8
3.4.3 Examples ..................... 3–8
3.4.4 Configuration commands ............ 3–9
3.4.5 Setting commands ................ 3–10
3.4.6 Scan commands .................. 3–10
3.4.7 Setup commands ................. 3–13
3.4.8 Interface commands ............... 3–13
3.4.9 Status commands ................. 3–15
3.5 Status model ........................ 3–18
3.5.1 Status byte (SB) .................. 3–18
3.5.2 Service request enable (SRE) .......... 3–19
3.5.3 Standard event status (ESR) ........... 3–19
4 Field Calibration 4 – 1
4.1 Introduction to Field Calibration ............ 4–2
4.2 Equipment needed .................... 4–2
4.3 Detailed procedure .................... 4–2
A Fuse and ac Line A – 1
A.1 Power Entry module ................... A–1
A.2 ac voltage selector ..................... A–1
A.3 Fuse installation ...................... A–3
DC205 Precision DC Voltage Source
General Information
Safety and Preparation for Use
Dangerous voltages, capable of causing injury or death, are
WARNING present in this instrument. Do not remove the product covers
or panels. Do not apply power or operate the product without
all covers and panels in place.
AC line voltage
The DC205 Precision DC Voltage Source operates from a 100 V, 120 V,
220 V–230 V, or 240 V nominal ac power source having a line fre-
quency of 50 Hz or 60 Hz. Before connecting the power cord to a
power source, verify that the LINE VOLTAGE SELECTOR, located
in the rear panel power-entry module, is set so that the correct ac line
voltage value is visible. For operation with 230 V ac power, the LINE
VOLTAGE SELECTOR should be set to 220 V.
The DC205 Precision DC Voltage Source will be damaged if oper-
CAUTION ated with the LINE VOLTAGE SELECTOR set for the wrong ac line
voltage, or if the wrong fuses are installed. Verify that the correct
line fuses are installed before connecting the line cord. Use two (2)
metric size 5 ×20 mm fuses. For 100 V/120 V, use 1 A fuses; for 220 V–
230 V/240 V, use 0.5 A fuses. See appendix A for detailed instructions.
Line cord
The DC205 Precision DC Voltage Source has a detachable, three-wire
power cord for connection to the power source and to a protective
ground. The chassis of the instrument is connected to the outlet
ground to protect against electrical shock. Always use an outlet
which has a properly connected protective ground.
Service
The DC205 Precision DC Voltage Source does not have any user
serviceable parts inside. Refer service to a qualified technician.
Do not install substitute parts or perform any unauthorized modi-
fications to this instrument. Contact the factory for instructions on
how to return the instrument for authorized service and adjustment.
iii
iv General Information
Symbols you may Find on SRS Products
Symbol Description
Alternating current
Caution - risk of electric shock
Frame or chassis terminal
Caution - refer to accompanying documents
Earth (ground) terminal
Battery
Fuse
On (supply)
Off (supply)
DC205 Precision DC Voltage Source
General Information v
Notation
The following notation will be used throughout this manual.
A warning means that injury or death is possible if the instructions
WARNING are not obeyed.
A caution means that damage to the instrument or other equipment
CAUTION is possible.
Typesetting conventions used in this manual are:
•Front-panel buttons are set as [Button]
•Front-panel knobs are set as
Knob
•Front-panel indicators are set as Overload
•Remote command names are set as *IDN?
•Literal text other than command names is set as OFF
Remote command examples will all be set in monospaced font. In
these examples, data sent by the host computer to the DC205 are set
as straight teletype font, while responses received by the host
computer from the DC205 are set as slanted teletype font.
DC205 Precision DC Voltage Source
vi General Information
Specifications
All performance specifications after 2 hour warm-up at 23 ◦C±1◦C
ambient, unless otherwise specified.
Output
Range Full Resolution Max Time Settling
scale (1 ppm) current const.†time ‡
VμV mA μs ms
1V ±1.010 000 1 50 160 50
10 V ±10.100 00 10 50 160 50
100 V ±101.000 0 100 25 400 100
†Time required to settle to 63 % of final value
‡Time to settle to 99.999 % of final value
Settling times measured for full-scale step into 10 MΩload.
Accuracy and stability
Range Accuracy Stability
(23 ◦C±5◦C) (±1◦C)
24 h 90 day∗1 year∗24 h
±( ppm setting +μV)
1V 7+2 12 +6 25 +10 1 +1
10 V 7+6 12 +15 25 +20 1 +3
100 V 8+60 12 +80 25 +100 1 +20
∗preliminary
Noise and drift
Range Temperature Noise
coefficient (typical)
0◦C–40◦C (0.1 – 10) Hz 10 Hz – 100 kHz
±( ppm setting +μV)/◦CμVrms
1V 1+1 0.5 9
10 V 1+2 1.5 12
100 V 1+15 12 50
DC205 Precision DC Voltage Source
General Information vii
Remote Interfaces
RS-232 DB-9 connector, 9600 baud
USB USB type B receptacle; serial port emulation, 115,200 baud
Optical fiber Connection to SX199 Optical Interface Controller. Provides
isolated connectivity to GPIB, RS-232, and Ethernet.
General
Parameter Specification
Temperature 0 ◦Cto40◦C, non-condensing
Power <20 W, 100/120/220/240 VAC, 50/60 Hz
Dimensions 8.3 W×3.5 H×13 D
Weight 10 lbs
Fuse two (2) metric size 5 ×20 mm
DC205 Precision DC Voltage Source
viii General Information
DC205 Precision DC Voltage Source
Table of contents
