Stanford Research Systems PS355, PS365, PS370, PS375 Operation And Service Manual

Operation and Service Manual

High Voltage Power Supplies

PS355, PS365, PS370, PS375

Stanford Research Systems

Revision 1.0 · December, 2008

Certi cation

Stanford Research Systems certifi es that this product met its published specifi cations at the time
of shipment.

Warranty

This Stanford Research Systems product is warranted against defects in materials and workmanship
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.

Contact Information

Stanford Research Systems, Inc.
1290-D Reamwood Avenue
Sunnyvale, CA 94089 USA

Phone: [phone]
Fax: [phone]
www.thinkSRS.com
[e-mail]

Information in this document is subject to change without notice.
Copyright © Stanford Research Systems, Inc., 2008. All rights reserved.
Printed in U.S.A.

Document number: 9-01637-903

Stanford Research Systems

PS300 Series High Voltage Power Supplies

Contents

General Information . . . . . . . . . . . . . . . . . . iii

Symbols . . . . . . . . . . . . . . . . . . . . . . . . . iv

Notation. . . . . . . . . . . . . . . . . . . . . . . . . v

Specifi cations . . . . . . . . . . . . . . . . . . . . . . vi

1 Instrument Overview . . . . . . . . . . . . . . . . . 1 – 1

1.1 Front Panel . . . . . . . . . . . . . . . . . . . . 1 – 2

1.2 Rear Panel . . . . . . . . . . . . . . . . . . . . 1 – 3

2 Guide to Operation . . . . . . . . . . . . . . . . . . 2 – 1

2.1 Se ing Parameters . . . . . . . . . . . . . . . . 2 – 2

2.2 Reset. . . . . . . . . . . . . . . . . . . . . . . . 2 – 3

2.3 Store and Recall . . . . . . . . . . . . . . . . . 2 – 3

2.4 Error Messages. . . . . . . . . . . . . . . . . . 2 – 4

2.5 Analog Monitor and Control . . . . . . . . . . 2 – 4

2.6 Default State . . . . . . . . . . . . . . . . . . . 2 – 5

3 Remote Operation . . . . . . . . . . . . . . . . . . . 3 – 1

3.1 Index of Common Commands . . . . . . . . . 3 – 2

3.2 Alphabetic List of Commands . . . . . . . . . 3 – 3

3.3 Introduction . . . . . . . . . . . . . . . . . . . 3 – 4

3.4 Commands . . . . . . . . . . . . . . . . . . . . 3 – 4

3.5 Status Model . . . . . . . . . . . . . . . . . . . 3 – 12

3.6 Status Reporting . . . . . . . . . . . . . . . . . 3 – 13

4 Troubleshooting . . . . . . . . . . . . . . . . . . . . 4 – 1

4.1 Troubleshooting the PS300 . . . . . . . . . . . 4 – 2

i

Contentsii

Stanford Research Systems

PS300 Series High Voltage Power Supplies

General Information

The PS300 Series High Voltage Power Supplies are general purpose
instruments designed for laboratory environments.

Warning

This unit contains hazardous high voltages. Make certain the high
voltage is completely discharged before removing the cable. The
charge on the cable can cause injury or damage.

Line Voltage

The PS300 series supplies operate from a 90 VAC to 264 VAC
power source having a line frequency between 47 Hz and 63 Hz.
Power consumption is less than 80 VA total.

A power entry module, labeled AC POWER on the back panel of the
PS300, provides connection to the power source and to a protective
ground.

Service

The PS300 uses a detachable, three-wire power cord for connection to
the power source. The exposed metal parts of the box are connected
to the power ground to protect against electrical shock. Always use
an outlet which has a properly connected protective ground.

The rear-panel high voltage connector and the BNC shields are also
connected to chassis ground. The PS300 series supplies CANNOT
be fl oated.

The line fuse is internal to the instrument and may not be serviced
by the user. Operate only with covers in place to avoid personal
injury. Do not remove the product covers or panels. Do not operate
the product without all covers and panels in place.

The PS300 does not include any user-serviceable parts inside. Refer
service to a qualifi ed technician.

iii

Symbols you may  nd on SRS products

Symbol Description

Alternating current

Caution - risk of electric shock

Frame or chassis terminal

Contentsiv

Caution - refer to accompanying documents

Earth (ground) terminal

Battery

Fuse

On (supply)

Off (supply)

Stanford Research Systems

PS300 Series High Voltage Power Supplies

Contents

Notation

v

Typese ing conventions used in this manual are as follows:

· Front-panel bu ons are represented as [Bu on]

· The [▲] and [▼] keys increment and decrement a digit.

· The [◄] and [►] keys select a digit.

· Front-panel indicators are represented as

· The state of a switch is represented in italics as ON

Overload

· Remote command names are represented as *IDN?

· Literal text other than command names is represented as OFF

Remote command examples will all be set in monospaced font.
In these examples, data sent by the host computer is set as
straight teletype font, while responses received by the
host computer are set as

slanted teletype font

.

PS300 Series High Voltage Power Supplies

Phone: [phone]

www.thinkSRS.com

Speci cations

Model Output Voltage (±) Maximum Current

PS355
PS365 +100 V to +10 kV 1 mA
PS370
PS375 +100 V to +20 kV 500 µA

Voltage Output

Voltage set accuracy 0.01 % + 0.05 % of full scale
Voltage display accuracy V
Voltage resolution 1 V (set and display)
Voltage rese ability 1 V
Voltage limit range 0 to 100 % of full scale
Voltage regulation 0.001 % for ±10 % line change,

0.04 % for 100 % load change.
Specifi cations apply for >0.5 % (full load) to
>1 % (no load) of full-scale voltage.
Output ripple (rms) <0.01 % of full scale (max.)
Current limit range 0 to 105 % of full scale
Current trip range 0 to 105 % of full scale
Trip response time <10 ms
Current set accuracy 1 µA
Current resolution 1 µA
Current display accuracy ±1 µA (typ.), ±2 µA (max.)
Stability 0.01 % per hr., <0.03 % per 8 hrs.
Temperature dri 50 ppm/°C, 0 to 50 °C (typ.)
Protection Arc and short circuit protected (programmable
voltage limit, current limit, and current trip)
HV output slew rate 7,000 V/s, typ. (PS355 and PS365)
14,000 V/s, typ. (PS370 and PS375)
Recovery time 12 ms for 40 % step change in load current (typ.)
Discharge time <6 s (to <1 % of full-scale voltage with no load, typ.)

Monitor Output

Output scale 0 to +10 V
(0 to full-scale output regardless of polarity)
Current rating 10 mA (max.)
Output impedance <1 Ω

-

100 V to -10 kV 1 mA

-

100 V to -20 kV 500 µA

accuracy ± 1 V, typ. (± 2 V, max.)

set

General Informationvi

Stanford Research Systems

PS300 Series High Voltage Power Supplies

General Information

Accuracy 0.2 % of full scale
Update rate 87.5 Hz

External Voltage Set

Input scale 0 to +10 V
(0 to full-scale output regardless of polarity)
Input impedance 1 MΩ
Accuracy 0.2 % of full scale
Update rate 87.5 Hz

Mechanical

HV connector Kings type 1064-1 (PS355 and PS365)
Kings type 1764-1 (PS370 and PS375)
Mating connector Kings type 1065-1 (PS355 and PS365)
Kings type 1765-1 (PS370 and PS375)
Dimensions 8.1″ × 3.5″ × 16″ (WHD)
Weight 8 lbs.
Power 50 W, 90 to 264 VAC, 47 to 63 Hz
Warranty One year parts and labor on defects in materials
or workmanship

vii

All performance specifi cations apply aĞ er a one hour warm-up period

PS300 Series HighVoltage Power Supplies

Phone: [phone]

www.thinkSRS.com

General Information

viii

PS300 Series HighVoltage Power Supplies

Phone: [phone]

www.thinkSRS.com

1 Instrument Overview

In This Chapter

This chapter gives the user the necessary information to get
started with the PS300 Series High Voltage Power Supplies.

1.1 Front Panel . . . . . . . . . . . . . . . . . . . . . . . 1–2

1.1.1 Power Bu on . . . . . . . . . . . . . . . . . 1–2

1.1.2 High Voltage Enable Switch . . . . . . . . . 1–2

1.1.3 Numeric Displays . . . . . . . . . . . . . . . 1–3

1.1.4 Select, Enter, Clear . . . . . . . . . . . . . . 1–3

1.1.5 Numeric and Cursor Keys . . . . . . . . . . 1–3

1.1.6 Instrument Status . . . . . . . . . . . . . . . 1–3

1.1.7 Other Keys . . . . . . . . . . . . . . . . . . . 1–3

1.1.8 Store and Recall . . . . . . . . . . . . . . . . 1–4

1.2 Rear Panel. . . . . . . . . . . . . . . . . . . . . . . . 1–4

1.2.1 Power Entry Module . . . . . . . . . . . . . 1–4

1.2.2 High Voltage Connector . . . . . . . . . . . 1–4

1.2.3 Analog I/O . . . . . . . . . . . . . . . . . . . 1–5

1.2.4 IEEE-488 Port . . . . . . . . . . . . . . . . . 1–5

1.2.5 RS-232 Port. . . . . . . . . . . . . . . . . . . 1–5

1 – 1

1.1 Front Panel

Instrument Overview1 – 2

The front-panel features of the PS300 Series High Voltage Power
Supplies are examined in this section.

1.1.1 Power Button

The PS300 is turned on by depressing the [POWER] bu on. The
unit always powers up with the high voltage OFF. The current
instrument confi guration and any saved instrument presets are
stored in non-volatile memory. The model number (355, 365, 370
or 375), fi rmware version, and serial number are displayed when
power is turned on. If an error appears on power up, the current
instrument confi guration and any saved presets are lost, and the
default se ings are used. If the default se ings are desired, hold
down the clear key [CLR] while turning on the power. Note that
this will clear out all buff ers and erase any saved presets.

1.1.2 High Voltage Enable Switch

The [High Voltage] enable switch has three positions that perform
several functions. In the down position, the high voltage is OFF,
and all trips are cleared. In this position, the high voltage is locked

OFF and cannot be turned on over the computer interface. The
UP position is momentary, and it turns on the high voltage for

manual or rear-panel analog control. In the middle position, the
high voltage is enabled (but not necessarily ON) and can be turned
on over the computer interface. The large red ON LED above the
switch indicates that the high voltage is on; the yellow TRIP LED
indicates a trip has occurred.

Stanford Research Systems

PS300 Series High Voltage Power Supplies

Front Panel

1.1.3 Numeric Displays

The two large displays show output voltage to fi ve signifi cant digits
and output current to four signifi cant digits. The polarity is indicated
below the voltage display as either POSITIVE or NEGATIVE. The
smaller center display shows the value of the parameter that is
being entered or adjusted. That parameter is indicated by the row
of LEDs directly below the center display.

1.1.4 Select, Enter, Clear

[SELECT] is used to choose which parameter is being displayed in
the center display. [ENTER] confi rms the entry in the center display.
[CLR] erases the value in the middle display and recalls the last
value that was entered. To adjust a value, [SELECT] is pressed until
the appropriate LED is lit. When the value is being changed, the LED
will fl ash to indicate the value is in a state of change. If an incorrect
value is entered, press [CLR] to start over. When the desired value
is displayed, [ENTER] updates the unit’s actual se ing and stops
the LED from fl ashing.

1 – 3

1.1.5 Numeric and Cursor Keys

All parameters may be adjusted using the cursor or numeric keys.
When using the cursor, the digit being adjusted in the center display
will fl ash. The [▲] and [▼] keys increment and decrement the digit.
The [◄] and [►] keys select the fl ashing digit. When using direct
numerical entry, simply press the number and decimal point keys
until the desired value appears on the center display. Note that the
current is specifi ed in microamps.

1.1.6 Instrument Status

Three LEDs indicate the instrument’s status. The
when the unit is in a current limit state.
panel is locked out.
programmed by the rear-panel analog input.

1.1.7 Other Keys

[RESET] toggles the reset mode between

[GPIB] displays the GPIB address in the center display so it can be
adjusted. It also functions as the [LOCAL] key when the unit is in
the remote mode.

LIMIT

REM

is on when the front

REAR

is on when the high voltage se ing is

AUTO

and

MAN

LED is on

(manual).

PS300 Series High Voltage Power Supplies

Phone: [phone]

www.thinkSRS.com