SRS Labs DC205 Manuel d'utilisation

Operation and Service Manual

Precision DC Voltage Source

DC205

Stanford Research Systems

Revision 1.15 •October 25, 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.

Stanford Research Systems, Inc.

1290–D Reamwood Avenue

Sunnyvale, CA 94089 USA

Phone: (408) 744-9040 •Fax: (408) 744-9049

www.thinkSRS.com •e-mail: [email protected]

Printed in U.S.A. Document number 9-01745-903

DC205 Precision DC Voltage Source

Contents

General Information v

Safety and Preparation for Use . . . . . . . . . . . . . . . . v

Symbols ............................. vi

Notation ............................. vii

Warnings............................. vii

Speciﬁcations . . . . . . . . . . . . . . . . . . . . . . . . . . viii

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 ...................... 1–7

1.5.3 Scanning...................... 1–8

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 – 5

2.1.3 Select /Adjust................... 2–5

2.1.4 Numeric Entry . . . . . . . . . . . . . . . . . . 2 – 6

2.1.5 Sense........................ 2–7

2.1.6 Conﬁg . . . . . . . . . . . . . . . . . . . . . . . 2 – 7

2.1.7 Scan ........................ 2–8

2.1.8 Output....................... 2–9

2.1.9 Status . . . . . . . . . . . . . . . . . . . . . . . . 2 – 9

2.1.10 Source Out . . . . . . . . . . . . . . . . . . . . . 2 – 10

2.2 Scanning . . . . . . . . . . . . . . . . . . . . . . . . . . 2 – 11

2.2.1 Overview of scanning . . . . . . . . . . . . . . 2 – 11

2.2.2 Scan terminology . . . . . . . . . . . . . . . . . 2 – 11

2.2.3 Arming scans . . . . . . . . . . . . . . . . . . . 2 – 12

2.2.4 Triggering scans . . . . . . . . . . . . . . . . . . 2 – 13

ii Contents

2.2.5 TRIG In and BUSY Out . . . . . . . . . . . . . 2 – 13

2.2.6 Ending or cancelling scans . . . . . . . . . . . 2 – 14

2.3 Error messages . . . . . . . . . . . . . . . . . . . . . . 2 – 15

2.3.1 Messages at power on . . . . . . . . . . . . . . 2 – 15

2.3.2 Field calibration . . . . . . . . . . . . . . . . . . 2 – 16

2.3.3 Scanning...................... 2–16

2.3.4 Interlock...................... 2–16

2.3.5 Unexpected resets . . . . . . . . . . . . . . . . 2 – 17

3 Architecture 3 – 1

3.1 Overview.......................... 3–2

3.2 Voltage reference . . . . . . . . . . . . . . . . . . . . . 3 – 3

3.3 Digital to analog converter . . . . . . . . . . . . . . . . 3 – 3

3.4 Ampliﬁers . . . . . . . . . . . . . . . . . . . . . . . . . 3 – 4

3.4.1 High-range ampliﬁer . . . . . . . . . . . . . . . 3 – 4

3.4.2 Low-range ampliﬁer . . . . . . . . . . . . . . . 3 – 4

3.5 Remote sensing . . . . . . . . . . . . . . . . . . . . . . 3 – 4

4 Remote Operation 4 – 1

4.1 Index of commands . . . . . . . . . . . . . . . . . . . . 4 – 2

4.2 Alphabetic list of commands . . . . . . . . . . . . . . . 4 – 4

4.3 Introduction ........................ 4–6

4.3.1 Interface conﬁguration . . . . . . . . . . . . . . 4 – 6

4.3.2 Isolation and computer noise . . . . . . . . . . 4 – 6

4.3.3 Buﬀers ....................... 4–6

4.4 Commands . . . . . . . . . . . . . . . . . . . . . . . . . 4 – 7

4.4.1 Command syntax . . . . . . . . . . . . . . . . . 4 – 7

4.4.2 Notation . . . . . . . . . . . . . . . . . . . . . . 4 – 8

4.4.3 Examples ..................... 4–8

4.4.4 Conﬁguration commands . . . . . . . . . . . . 4 – 9

4.4.5 Setting commands . . . . . . . . . . . . . . . . 4 – 10

4.4.6 Scan commands . . . . . . . . . . . . . . . . . . 4 – 11

4.4.7 Setup commands . . . . . . . . . . . . . . . . . 4 – 14

4.4.8 Interface commands . . . . . . . . . . . . . . . 4 – 14

4.4.9 Status commands . . . . . . . . . . . . . . . . . 4 – 18

4.5 Statusmodel........................ 4–22

4.5.1 Status byte (SB) . . . . . . . . . . . . . . . . . . 4 – 23

4.5.2 Service request enable (SRE) . . . . . . . . . . 4 – 23

4.5.3 Standard event status (ESR) . . . . . . . . . . . 4 – 24

4.5.4 DC source status (DCCR/DCEV) . . . . . . . . 4 – 24

5 Field Calibration 5 – 1

5.1 Introduction to ﬁeld calibration . . . . . . . . . . . . . 5 – 2

DC205 Precision DC Voltage Source

Contents iii

5.2 Calibration method . . . . . . . . . . . . . . . . . . . . 5 – 2

5.3 Equipment needed . . . . . . . . . . . . . . . . . . . . 5 – 3

5.4 Detailed procedure . . . . . . . . . . . . . . . . . . . . 5 – 3

5.5 Following ﬁeld calibration . . . . . . . . . . . . . . . . 5 – 5

5.6 Restoring the factory calibration . . . . . . . . . . . . 5 – 6

6 Performance Veriﬁcation 6 – 1

6.1 Introduction to performance veriﬁcation . . . . . . . . 6 – 2

6.2 Equipment needed . . . . . . . . . . . . . . . . . . . . 6 – 2

6.3 Veriﬁcation procedure . . . . . . . . . . . . . . . . . . 6 – 2

6.4 Performance test records . . . . . . . . . . . . . . . . . 6 – 3

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

iv Contents

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. These voltages can persist for many

minutes after ac power is removed. 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.

vi 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 vii

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.

Warnings

The DC205 is equiped with a safety interlock, which must be closed

to energize the ±100 V output range of the instrument. Details on the

safety interlock can be found in section 1.6 on page 1 – 10 .

When using banana-to-BNC adapter hardware with the DC205, the

ground tab of the adapter must be oriented to the black LO terminal,

and the black LO terminal must be grounded. This ensures that

the exposed BNC shield parts are at a safe electrical potential. Use

of banana-to-BNC adapters is not recommended when the safety

interlock is closed or the DC205 is operated on the ±100 V range.

WARNING

DC205 Precision DC Voltage Source

viii 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

1 V ±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±1◦C) (±1◦C)

24 h 90 day∗1 year∗24 h

±( ppm setting +µV)

1 V 7 +2 12 +6 25 +10 1 +1

10 V 7 +12 12 +20 25 +20 1 +3

100 V 8 +120 12 +200 25 +200 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

1 V 1 +1 0.5 9

10 V 1 +2 1.5 12

100 V 1 +15 12 50

DC205 Precision DC Voltage Source

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