Safety information
Please review the following safety precautions before operating our equipment.
General information
The following safety precautions should be observed before using this product and any associated
instrumentations.
This product is intended for use by qualified personnel who recognize shock hazards and are familiar with the
safety precautions required to avoid possible injury. Read and follow all installation, operation, and maintenance
information carefully before using the product. Refer to this manual for complete product specifications.
If the product is used in a manner not specified, the protection provided by the product may be impaired.
Before performing any maintenance, disconnect the line cord and all test cables.
Protection from electric shock
Operators of this instrument must be protected from electric shock at all times. The responsible body must ensure
that operators are prevented access and/or insulated from every connection point. In some cases, connections
must be exposed to potential human contact.
Under these circumstances personnel must be trained to protect themselves from the risk of electric shock. If the
circuit is capable of operating at or above 1000 volts, no conductive part of the circuit may be exposed.
Definition of users
Responsible body is the individual or group responsible for the use and maintenance of equipment is operated
within its specifications and operating limits, and for ensuring that operators are adequately trained.
This product should only be used as intended. Users must be trained in electrical safety procedures and proper
use of the instrument. Users must be protected from electric shock and contact with hazardous live circuits.
Service is only to be performed by qualified service personnel.
Safety symbols and terms
C
onnect to safety earth ground using the wire recommended in the user manual.
This symbol on an instrument indicates that the user should refer to the operating instructions
located in the manual.
Certification
We certify that this product met its published specifications at time of shipment from the factory.
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TABLE OF CONTENTS
1. Introduction............................................................................................................ 4
Description ............................................................................................................................................... 4
Features .................................................................................................................................................... 4
2. Quick Reference ..................................................................................................... 5
2.1 The Front Panel .......................................................................................................................................... 5
2.2 The Rear Panel
......................................................................................................................................... 6
2.3 Preliminary Checkout ................................................................................................................................. 7
1. Check the list of supplied items............................................................................................................ 7
2. Connect the power cord and turn on the power supply ........................................................................ 7
3. Checkout Procedure ............................................................................................................................. 7
1.4 Output Verification ..................................................................................................................................... 8
Voltage Output Check............................................................................................................................... 8
Current Output Check .............................................................................................................................. 9
1.5 If the power supply does not turn On ......................................................................................................... 9
1.5.1 Fuse Replacement............................................................................................................................ 9
1.6 Adjusting the Carrying Handle ................................................................................................................. 10
1.7 Rack Mounting the Instrument ................................................................................................................. 11
3. Front-panel Operation ........................................................................................ 12
3.1 Front Panel Keys ...................................................................................................................................... 12
Numerical Keys/Secondary Shift Functions........................................................................................... 13
Shift Functions ....................................................................................................................................... 13
Primary Function Keys ........................................................................................................................... 13
Up/Down and Entry key ......................................................................................................................... 13
3.2 Front-panel Operation Overview .............................................................................................................. 14
3.3 Setting the Voltage.................................................................................................................................... 14
3.4 Setting the Current.................................................................................................................................... 14
3.5 Save and Recall Operation ....................................................................................................................... 14
3.6 Menu Operation........................................................................................................................................ 15
3.6.1 Menu Description .......................................................................................................................... 15
3.6.2 Menu Function .............................................................................................................................. 17
3.7 Output Operation ...................................................................................................................................... 22
3.8 Remote Sense and digital port functions .................................................................................................. 22
3.9 Digital Volt Meter (DVM) ........................................................................................................................ 23
3.10 Milliohm Meter ...................................................................................................................................... 24
4. Remote Operation ................................................................................................ 25
4.1 Serial adapter connector ........................................................................................................................... 25
4.2 Communication between Power Supply and PC ...................................................................................... 26
4.3 SCPI Command Overview ....................................................................................................................... 27
Common IEEE488.2 Commands ........................................................................................................... 27
Essential SCPI Commands ..................................................................................................................... 28
Port Configuration Commands ............................................................................................................... 30
Trigger Command .................................................................................................................................. 30
SCPI Condition Register ........................................................................................................................ 30
4.4 SCPI Command Description .................................................................................................................... 31
Common IEEE488.2 Commands ........................................................................................................... 31
Essential SCPI Commands ..................................................................................................................... 34
Output Commands .................................................................................................................................. 37
List File Commands ............................................................................................................................... 38
Interface Configuration Commands ....................................................................................................... 42
Trigger commands .................................................................................................................................. 43
5. Specifications ........................................................................................................ 45
5.1 Specifications ........................................................................................................................................... 45
5.2 Supplemental Characteristics ................................................................................................................... 47
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1. Introduction
Description
Models 9120A, 9121A, 9122A, 9123A, 9124, 9150, 9151, 9152, and 9153 are fully programmable, linear DC
Power Supplies that provide you with clean and reliable power, high resolution and accuracy combined with fast
transient response times and excellent temperature stability. The front panel keys and the control knob provide
a convenient interface for adjusting Voltage and Current, storing and recalling operating states or
enabling/disabling the output. This power supply is suitable for either bench or rack mounted operation. The
912xA is a compact, laboratory grade power supply well suited for applications in design, production or use in
university labs.
Features
Very high accuracy and resolution: 0.1 mV, 0.1 mA
Low ripple and low noise
Fast settling time of <150 μs
5
1
digit digital voltage meter and mΩ meter
2
Convenient data entry via knob or numerical key pad
Over Temperature (OTP) protection
Bright and easy to read display (VFD technology)
Excellent temperature stability
Output on/off control
SCPI compatible command set. Communicate via USB or GPIB (model 9123A only) interface
Application Software for front panel emulation and simple test sequence generation
Rack mount kit available
Closed case calibration
Remote Sense Function
Discrete Fault Indicator/Remote Inhibit (DFI/RI). Can be used to turn off power supplies simultaneously.
(DFI available for models 9120A, 9121A, 9122A, 9123A, 9124 only)
List Mode: Generate, store and execute test sequences without the need for an external computer
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