Agilent Technologies | 6834B | User`s guide | Agilent Technologies 6834B User`s guide

User’s Guide
AC Power Solutions
Agilent Models 6814B, 6834B, and 6843A
For instruments with Serial Numbers:
Agilent 6814B: 3601A-00101 through 00270
US36010101-up
Agilent 6834B: 3601A-00101 through 00140
US36010101-up
Agilent 6843A: 3540A-00101 through 00140
US35400101-up
Agilent Part No. 5962-0887
Microfiche No 5962-0888
Printed in U.S.A.
December, 1998
Update April 2000
Warranty Information
CERTIFICATION
Agilent Technologies certifies that this product met its published specifications at time of shipment from the factory.
Agilent Technologies further certifies that its calibration measurements are traceable to the United States National
Bureau of Standards, to the extent allowed by the Bureau’s calibration facility, and to the calibration facilities of other
International Standards Organization members.
WARRANTY
This Agilent Technologies hardware product is warranted against defects in material and workmanship for a period
of three years from date of delivery. Agilent Technologies software and firmware products, which are designated by
Agilent Technologies for use with a hardware product and when properly installed on that hardware product, are
warranted not to fail to execute their programming instructions due to defects in material and workmanship for a
period of 90 days from date of delivery. During the warranty period Agilent Technologies will, at its option, either
repair or replace products which prove to be defective. Agilent Technologies does not warrant that the operation for
the software firmware, or hardware shall be uninterrupted or error free.
For warranty service, with the exception of warranty options, this product must be returned to a service facility
designated by Agilent Technologies. Customer shall prepay shipping charges by (and shall pay all duty and taxes)
for products returned to Agilent Technologies for warranty service. Except for products returned to Customer from
another country, Agilent Technologies shall pay for return of products to Customer.
Warranty services outside the country of initial purchase are included in Agilent Technologies product price, only if
Customer pays Agilent Technologies international prices (defined as destination local currency price, or U.S. or
Geneva Export price).
If Agilent Technologies is unable, within a reasonable time to repair or replace any product to condition as warranted,
the Customer shall be entitled to a refund of the purchase price upon return of the product to Agilent Technologies.
LIMITATION OF WARRANTY
The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by the
Customer, Customer-supplied software or interfacing, unauthorized modification or misuse, operation outside of the
environmental specifications for the product, or improper site preparation and maintenance. NO OTHER
WARRANTY IS EXPRESSED OR IMPLIED. AGILENT TECHNOLOGIES SPECIFICALLY DISCLAIMS THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
EXCLUSIVE REMEDIES
THE REMEDIES PROVIDED HEREIN ARE THE CUSTOMER’S SOLE AND EXCLUSIVE REMEDIES. AGILENT
TECHNOLOGIES, INC. SHALL NOT BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR
CONSEQUENTIAL DAMAGES, WHETHER BASED ON CONTRACT, TORT, OR ANY OTHER LEGAL THEORY.
ASSISTANCE
The above statements apply only to the standard product warranty. Warranty options, extended support contacts,
product maintenance agreements and customer assistance agreements are also available. Contact your nearest
Agilent Technologies Sales and Service office for further information on Agilent Technologies’ full line of Support
Programs.
2
Safety Summary
The following general safety precautions must be observed during all phases of operation of this instrument.
Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety
standards of design, manufacture, and intended use of the instrument. Agilent Technologies assumes no liability
for the customer’s failure to comply with these requirements.
WARNING: LETHAL VOLTAGES
Ac sources can supply 425 V peak at their output. DEATH on contact may result if the output terminals or circuits
connected to the output are touched when power is applied.
GENERAL
This product is a Safety Class 1 instrument (provided with a protective earth terminal). The protective features of
this product may be impaired if it is used in a manner not specified in the operation instructions.
Any LEDs used in this product are Class 1 LEDs as per IEC 825-1.
ENVIRONMENTAL CONDITONS
This instrument is intended for indoor use in an installation category III, pollution degree 2 environment. It is
designed to operate at a maximum relative humidity of 95% and at altitudes of up to 2000 meters. Refer to the
specifications tables for the ac mains voltage requirements and ambient operating temperature range.
BEFORE APPLYING POWER
Verify that the product is set to match the available line voltage, the correct fuse is installed, and all safety
precautions are taken. Note the instrument’s external markings described under "Safety Symbols".
GROUND THE INSTRUMENT
To minimize shock hazard, the instrument chassis and cover must be connected to an electrical ground. The
instrument must be connected to the ac power mains through a grounded power cable, with the ground wire firmly
connected to an electrical ground (safety ground) at the power outlet. Any interruption of the protective
(grounding) conductor or disconnection of the protective earth terminal will cause a potential shock hazard that
could result in personal injury.
ATTENTION: Un circuit de terre continu est essentiel en vue du fonctionnement sécuritaire de l’appareil.
Ne jamais mettre l'appareil en marche lorsque le conducteur de mise … la terre est d‚branch‚.
FUSES
Only fuses with the required rated current, voltage, and specified type (normal blow, time delay, etc.) should be
used. Do not use repaired fuses or short-circuited fuseholders. To do so could cause a shock or fire hazard.
DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE
Do not operate the instrument in the presence of flammable gases or fumes.
DO NOT REMOVE THE INSTRUMENT COVER
Operating personnel must not remove instrument covers. Component replacement and internal adjustments must be
made only by qualified service personnel.
DO NOT EXCEED INPUT RATINGS
Operation at line voltages or frequencies in excess of those stated on the line rating label may cause leakage
currents in excess of 5.0 mA peak.
Instruments that appear damaged or defective should be made inoperative and secured against unintended
operation until they can be repaired by qualified service personnel.
3
SAFETY SYMBOLS
Direct current
Alternating current
Both direct and alternating current
Three-phase alternating current
Earth (ground) terminal
Protective earth (ground) terminal
Frame or chassis terminal
Terminal is at earth potential. Used for measurement and control circuits designed to be
operated with one terminal at earth potential.
Terminal for Neutral conductor on permanently installed equipment
Terminal for Line conductor on permanently installed equipment
On (supply)
Off (supply)
Standby (supply). Units with this symbol are not completely disconnected from ac mains when
this switch is off. To completely disconnect the unit from ac mains, either disconnect the power
cord or have a qualified electrician install an external switch.
In position of a bi-stable push control
Out position of a bi-stable push control
Caution, risk of electric shock
Caution, hot surface
Caution (refer to accompanying documents)
WARNING
Caution
4
The WARNING sign denotes a hazard. It calls attention to a procedure, practice, or the like,
which, if not correctly performed or adhered to, could result in personal injury. Do not proceed
beyond a WARNING sign until the indicated conditions are fully understood and met.
The CAUTION sign denotes a hazard. It calls attention to an operating procedure, or the like,
which, if not correctly performed or adhered to, could result in damage to or destruction of part
or all of the product. Do not proceed beyond a CAUTION sign until the indicated conditions
are fully understood and met.
Declaration Page
DECLARATION OF CONFORMITY
according to ISO/IEC Guide 22 and EN 45014
Manufacturer’s Name:
Manufacturer’s Address:
Agilent Technologies, Inc.
140 Green Pond Road
Rockaway, New Jersey 07866
U.S.A.
declares that the Product
Product Name:
a) AC Power Source/Analyzer
b) Harmonic/Flicker Test System
Model Number(s):
a) Agilent 6814A, 6814B, 6834A, 6834B
b) Agilent 6843A
conforms to the following Product Specifications:
Safety:
IEC 1010-1:1990+A1(1992) / EN 61010-1:1993
EMC:
CISPR 11:1990 / EN 55011:1991 - Group 1 Class A
IEC 801-2:1991 / EN 50082-1:1992 - 4 kV CD, 8 kV AD
IEC 801-3:1984 / EN 50082-1:1992 - 3 V / m
IEC 801-4:1988 / EN 50082-1:1992 - 0.5 kV Signal Lines
1 kV Power Lines
Supplementary Information:
The product herewith complies with the requirements of the Low Voltage Directive
73/23/EEC and the EMC Directive 89/336/EEC and carries the CE-marking accordingly.
New Jersey
Location
January 1997
Date
__
__
Bruce Krueger / Quality Manager
European Contact: Your local Agilent Sales and Service Office or Agilent GmbH,
Department TRE, Herrenberger Strasse 130, D-71034 Boeblingen (FAX:+49-7031-14-3143)
5
Acoustic Noise Information
Herstellerbescheinigung
Diese Information steht im Zusammenhang mit den Anforderungen der
Maschinenläminformationsverordnung vom 18 Januar 1991.
* Schalldruckpegel Lp <70 dB(A)
* Am Arbeitsplatz
* Normaler Betrieb
* Nach EN 27779 (Typprüfung).
Manufacturer’s Declaration
This statement is provided to comply with the requirements of the German Sound Emission Directive,
from 18 January 1991.
* Sound Pressure Lp <70 dB(A)
* At Operator Position
* Normal Operation
* According to EN 27779 (Type Test).
Printing History
The edition and current revision of this manual are indicated below. Reprints of this manual containing
minor corrections and updates may have the same printing date. Revised editions are identified by a new
printing date. A revised edition incorporates all new or corrected material since the previous printing
date.
Changes to the manual occurring between revisions are covered by change sheets shipped with the
manual. In some cases, the manual change applies only to specific instruments. Instructions provided on
the change sheet will indicate if a particular change applies only to certain instruments.
This document contains proprietary information protected by copyright. All rights are reserved. No part
of this document may be photocopied, reproduced, or translated into another language without the prior
consent of Agilent Technologies. The information contained in this document is subject to change
without notice.
 Copyright 1996, 1998 Agilent Technologies, Inc.
6
Edition 1 _________January, 1996
Edition 2 ________December, 1998
Update ________April, 2000
Table of Contents
Warranty Information
Safety Summary
Declaration Page
Acoustic Noise Information
Printing History
Table of Contents
1. GENERAL INFORMATION
Document Orientation
Safety Considerations
Options, Accessories, and User Replaceable Parts
Description
Capabilities
Front Panel/Remote Operation
Output Characteristic
Ranges
Output VA Capability
2. INSTALLATION
2
3
5
6
6
7
9
9
10
10
10
11
12
12
12
13
15
Inspection
Damage
Packaging Material
Items Supplied
Cleaning
Location
Bench Operation
Rack Mounting
Input Connections
Input Source and Line Fuse
Installing the Power Cord
Output Connections
Wire Considerations
Voltage Drops
Remote Sense Connections
OVP Considerations
Output Rating
Trigger Connections
Digital Connections
Controller Connections
GPIB Connector
RS-232 Interface
15
15
15
15
15
16
16
16
16
17
17
18
19
19
20
21
21
21
21
22
22
23
3. TURN-ON CHECKOUT
25
Introduction
Preliminary Checkout
Using the Keypad
Checkout Procedure
In Case of Trouble
Error Messages
Line Fuse
25
25
26
26
29
29
29
7
4. FRONT PANEL OPERATION
Introduction
Front Panel Description
System Keys
Function Keys
Immediate Action Keys
Scrolling Keys
Meter Display Keys
Output Control Keys
Protection and Status Control Keys
Trigger and List Control Keys
Entry Keys
Examples of Front Panel Programming
1 - Setting the Output Voltage Amplitude
Procedure for Three-Phase AC Sources
2 - Setting the Output Frequency
3 - Setting a Protection Feature
4 - Using Transient Voltage Modes
5 - Trigger Delays and Phase Synchronization
6 - Using Slew Rates to Generate Waveforms
7 - Measuring Peak Inrush Current
8 - Setting the GPIB Address and RS-232 Parameters
9 - Saving and Recalling Operating States
10 - Switching Between Single- and Three-phase Operation (Agilent 6834B only)
A. SPECIFICATIONS
Specifications
Supplemental Characteristics
B. VERIFICATION AND CALIBRATION
Introduction
Equipment Required
Test Setup
Performing the Verification Tests
Turn-On Checkout Procedure
Voltage Programming and Measurement Accuracy
RMS Current Readback Accuracy
Performing the Calibration Procedure
Front Panel Calibration Menu
Front Panel Calibration
Enable Calibration Mode
Calibrating and Entering Voltage Calibration Values
Calibrating and Entering Current Calibration Values
Calibrating the Output Impedance (Agilent 6843A only)
Saving the Calibration Constants
Changing the Calibration Password
Calibration Error Messages
Calibration Over the GPIB
Agilent Calibration Program Listing
C. ERROR MESSAGES
Error Number List
INDEX
8
31
31
31
33
34
34
35
35
36
38
39
40
41
41
42
43
43
44
47
50
52
53
53
54
55
55
56
59
59
59
60
60
60
61
61
62
63
63
63
64
65
66
66
66
67
67
67
71
71
75
1
General Information
Document Orientation
This manual describes the operation of the Agilent Technologies 6814B/6834B/6843A AC Power
Solutions. These units will be referred to as "ac sources" throughout this manual. Operation of the
Agilent 6843A is described for normal mode operation only. The following documents are shipped with
your ac source:
♦
♦
♦
♦
♦
a Quick-Start Guide, to help you quickly get started using the ac source
a User’s Guide, containing detailed installation, checkout, and front panel information
a Programming Guide, containing detailed GPIB programming information
a Quick Reference Card, designed as a memory jogger for the experienced user
Regulatory Test Solution User’s Guides are shipped with Agilent 6843A units only
You will find information on the following tasks in these guides. Refer to the table of contents of each
guide for a complete list of the topics.
Topic
Accessories and options
Calibrating the ac source
Front panel keys
Front panel programming examples
Line voltage connections
Line voltage ratings
Operator replaceable parts
Operator troubleshooting
Operating characteristics
Performance specifications
Quick operating checkout
Rack mounting
RS-232 operation
SCPI programming examples
SCPI programming commands
Turn-on/checkout
Wiring - discrete fault indicator (DFI)
- GPIB controller
- load or loads
- voltage sensing (local and remote)
- remote inhibit (RI)
Location
Chapter 1 - this guide
Appendix B - this guide
Chapter 4 - this guide
Chapter 4 - this guide
Chapter 2 - this guide
Appendix A - this guide
Chapter 1 - this guide
Chapter 3 - this guide
Appendix A - this guide
Appendix A - this guide
Chapter 3 - this guide
Chapter 2 - this guide
Chapter 2 - this guide
Chapter 3 - Programming Guide
Chapter 4 - Programming Guide
Chapter 3 - this guide
Chapter 2 - this guide
Chapter 2 - this guide
Chapter 2 - this guide
Chapter 2 - this guide
Chapter 2 - this guide
9
1 - General Information
Safety Considerations
This ac source is a Safety Class 1 instrument, which means it has a protective earth terminal. That
terminal must be connected to earth ground through a power source equipped with a ground receptacle.
Refer to the Safety Summary page at the beginning of this guide for general safety information. Before
installation or operation, check the ac source and review this guide for safety warnings and instructions.
Safety warnings for specific procedures are located at appropriate places in the guide.
Options, Accessories, and User Replaceable Parts
Option
400
1CM
Table 1-1. Options
Description
Input power 360-440 Vac, three-phase, 47-63 Hz
2- Rack mount kit (Agilent 5062-3977)
Support rails (Agilent 5064-0001) are required (rails are not included in rack mount kit).
Table 1-2. Accessories
Item
Fuse replacement kits
30AM for 180-235 Vac, 3-phase line
GPIB cables
0.5 meters (1.6 ft)
1.0 meter (3.3 ft)
2.0 meters (6.6 ft)
3.0 meters (13.2 ft)
Heavy duty slide mount kit
Agilent Part Number
5060-3513
10833D
10833A
10833B
10833C
5063-2310
Table 1-3. User Replaceable Parts List
Description
Rack mount kit
Slide mount kit
7-terminal sense connector plug
Sense connector cover
4-terminal digital connector plug
AC input safety cover (with strain relief and brushing)
Screw (4), ac input safety cover (6-32 x 1.5in)
Screw (8), ac input barrier block (8-32 x 5/16in)
AC output safety cover
Screw (2), ac output safety cover (6-32 x .3in)
Screw (8), ac output barrier block (10-32 x .37in)
Fuse safety cover
Screw (2), fuse safety cover (6-32 x .3in)
User’s Guide (this manual)
Programming Guide
Quick Start Guide
Quick Reference Card
Appropriate Agilent Regulatory Test Solution Software
10
Agilent Part No.
See “Options”
See “Accessories”
1252-3698
4040-2268
1252-1488
5001-9837
2360-0405
N/A
5001-9811
2460-0012
N/A
5001-9810
2460-0012
5962-0887
5962-0889
5962-0883
5962-0885
Agilent 14761A, 14762A, 14763A
General Information - 1
Description
The ac source combines three instruments in one unit as shown in the following figure. The function
generator produces waveforms with programmable amplitude, frequency, and shape. The power
amplifier amplifies the function generator signal to produce the ac power for your application. The
measurement functions range from a simple readback of rms voltage and current, to sophisticated
capabilities such as waveform analysis.
DAC
SOURCE
shunt
WAVEFORM
BIPOLAR
MEASUREMENT
GENERATOR
AMPLIFIER
BLOCK
POWERMETER
FFT ANALYZER
Figure 1-1. AC Source Functional Elements
The following model ac power sources are described in this User’s Guide:
Model
Agilent 6814B
Agilent 6834B
Agilent 6843A
Description
3000 VA single –phase operation
1500 VA/ phase for three-phase operation
(4500 VA for single-phase operation)
4500 VA single-phase operation
Capabilities
♦
♦
♦
♦
♦
♦
♦
♦
Programmable ac voltage, dc voltage, frequency, phase, and current limit.
Sine, square, clipped sine, and user-definable waveforms.
Voltage and frequency slew control.
Synthesized waveform generation for high resolution and accuracy in frequency, low waveform
distortion, and glitch-free phase transitions.
Step and pulse output transients for generating surge, sag, dropout, and other line disturbance
simulations.
Nonvolatile list programming for generating complex output transients or test sequences.
Three-phase/single-phase output capability (Agilent 6834B only)
Extensive measurement capability:
• Ac rms, dc, ac+dc voltage and current and peak current.
• Real, reactive, and apparent power.
• Harmonic analysis of voltage and current waveforms gives amplitude, phase, and total
harmonic distortion results up to the 50th harmonic.
• Triggered acquisition of digitized voltage and current with extensive post-acquisition
calculations.
11
1 - General Information
♦
♦
♦
♦
♦
♦
♦
• Additional total power and neutral current measurements in the three-phase model.
• All measurements made with 16-bit resolution.
Trigger In and Trigger Out for synchronizing transient events or measurements with external
signals.
Front panel control with 14-character vacuum fluorescent display, keypad, and rotary pulse
generators for voltage and frequency settings.
Built-in GPIB and RS-232 interface programming with SCPI command language.
Nonvolatile state and waveform storage and recall.
Over-voltage, over-power, over-current, over-temperature, and RI/DFI protection features.
Built-in output and sense disconnect relays.
Extensive selftest, status reporting, and software calibration.
Front Panel/Remote Operation
The front panel has both rotary (RPG) and keypad controls for setting the output voltage and frequency.
The panel display provides digital readouts of a number of output measurements. Annunciators display
the operating status of the ac source. System keys let you perform system functions such as setting the
GPIB address and recalling operating states. Front panel Function keys access the ac source function
menus. Front panel Entry keys let you select and enter parameter values. Refer to Chapter 4 for a
complete description of the front panel controls.
Remotely programming is accomplished from either the GPIB bus or from an RS-232 serial port. GPIB
and RS-232 programming uses SCPI commands (Standard Commands for Programmable Instruments)
that make the ac source programs compatible with those of other instruments. AC source status registers
permit remote monitoring of a wide variety of ac source operating conditions
NOTE:
Refer to the ac source Programming Guide for further information about remotely
programming the ac source. If you are using the Agilent 6843A, refer to the appropriate
Regulatory Test Solution User’s Guide for information about regulatory testing.
Output Characteristic
Ranges
The ac source’s output characteristic is shown in the following figure. The output voltage of the ac
source may be adjusted to any value within the range of the unit. On three-phase units, each phase can be
adjusted independently of the other two.
Rated output VA and conversion efficiency is greatest when the output voltage is set near maximum. For
this reason, the ac source is designed to operate on one of two ranges: 150 volts full-scale, or 300 volts
full-scale. You should choose the range that allows you to operate nearest the full-scale output capability
of the selected range.
12
General Information - 1
Vrms
300 V
150 V
See Figure 1-3
Irms
0
5A
15A
10A
16A
10A (6834B 3phase)
30A (6834B 1phase)
20A (6814B)
32A (6843A)
Figure 1-2. AC Source Output Characteristic (in real-time mode)
Output VA Capability
The output capability of each output phase is limited by VA (volts-amps) rather than power (watts). The
amount of VA available to a load can be determined by examining figure 1-3, the output power curve.
This curve rates the available VA versus output voltage. Full VA is available only at a full-scale voltage.
Full current is available at voltages between 50% and 100% of the output voltage range. Appendix A
documents the ac source’s specifications and supplemental characteristics.
The load on the ac source may draw full VA at any power factor between 0 and 1, and
may draw maximum current with a crest factor of 4 (3 for Agilent 6843A). If the load
draws current in excess of the maximum rated rms or peak current, the voltage amplitude
will be clipped to prevent excessive internal power dissipation.
100
90
80
OUTPUT VA, PERCENT OF MAXIMUM
NOTE:
70
60
50
40
30
20
10
0
10
20
30
40
50
60
70
80
90
OUTPUT VOLTAGE, PERCENT OF RANGE
100
Figure 1-3. AC Source VA Capabilities
13
2
Installation
Inspection
Damage
When you receive your ac source, inspect it for any obvious damage that may have occurred during
shipment. If there is damage, notify the shipping carrier and the nearest Agilent Sales and Support Office
immediately. The list of Agilent Sales and Support Offices is at the back of this guide. Warranty
information is printed in the front of this guide.
Packaging Material
Until you have checked out the ac source, save the shipping carton and packing materials in case the unit
has to be returned. If you return the ac source for service, attach a tag identifying the model number and
the owner. Also include a brief description of the problem.
Items Supplied
Check that the following items are included with your ac source. Some items are installed in the unit.
Power Cord
A power cord appropriate for your location. The cord may or may not be terminated in
a power plug (see "Options" in Chapter 1). If the cord is not included, contact your
nearest Agilent Sales and Support Offices (refer to the list at the back of this guide).
Sense/Digital connector
a 4-terminal digital plug that connects to the back of the unit.
a 7-terminal sense plug that connects to the back of the unit.
Safety covers
Ac input cover with strain relief
Ac output cover
Fuse cover
Manuals
User’s Guide
Programming Guide
Quick Start Guide
Quick Reference Card
Regulatory Test Solutions Guides (supplied with Agilent 6843A units)
Change page
If applicable, change sheets may be included with this guide. If there are change sheets,
make the indicated corrections in this guide.
Cleaning
Use a dry cloth or one slightly dampened with water to clean the external case parts. Do not attempt to
clean internally.
WARNING:
To prevent electric shock, unplug the unit before cleaning.
15
2 - Installation
Location
Refer to the Safety Summary page at the beginning of this manual for safety-related information about
environmental conditions.
WARNING:
Agilent 6814B units weigh 79.5 kg (175 lbs.)
Agilent 6834B/ 6843A units weigh 87.7 kg (193 lbs.)
Obtain adequate help when moving the unit or mounting the unit in the rack.
Bench Operation
The outline diagram in figure 2-1 gives the dimensions of your ac source. The feet may be removed for
rack mounting. Your ac source must be installed in a location that allows sufficient space at the sides and
back of the unit for adequate air circulation. Minimum clearances are 1 inch (25 mm) along the sides. Do
not block the fan exhaust at the rear of the unit.
Rack Mounting
The ac source can be mounted in a standard 19-inch rack panel or cabinet. Rack mounting kits are
available as Option 1CM or 1CP. Installation instructions are included with each rack mounting kit
CAUTION:
Agilent 6814B/ 6834B/ 6843A units require instrument support rails for non-stationary
installations. These are normally ordered with the cabinet and are not included with the
rack mounting kits.
TOP
574.7mm
22.6"
425.5mm
16.75"
REAR
262.6mm
266.7mm
10.5"
10.3"
19.1mm
12.7mm
0.5"
0.8"
Figure 2-1. Outline Diagram
16
SIDE
Installation - 2
Input Connections
Input Source and Line Fuse
The ac source requires a 3-phase power service that provides 7350 VA (6000 W) maximum. The power
service should have a current rating greater than or equal to the ac source’s circuit breaker rating. The ac
source has a delta input (no neutral connection) and will accept power from either delta (triangle) or wye
(star) services.
CAUTION:
Two input voltage ranges are available (see "AC Input Ratings" in appendix A). The ac
source will be damaged if it is operated at an input voltage that is outside of its
configured input range.
In order to maintain phase current balancing, the power service should be a dedicated line with only
Agilent 6814B/6834B/6843A ac sources drawing current from it. A disconnect box located near the ac
source is recommended for all installations and is mandatory for direct-wired installations.
Installing the Power Cord
WARNING:
Installation of the power cord must be done by a qualified and licensed electrician
and must be in accordance with local electrical codes.
The power cords supplied with the ac source do not include a power plug. Terminating connectors and a
ground lug are attached to one end of the cord. See Figure 2-2 while performing the following
procedure.
1.
Check the line fuses as follows:
a.
Examine the FUSES label on the rear panel.
b.
Remove the safety cover in front of the fuse caps.
c.
Unscrew the line fuse caps from the rear panel and verify that all fuses are as
specified on the label. Reinstall the fuses.
d.
Reinstall the safety cover in front of the fuse caps.
2.
Remove the ac input cover from the back of the unit.
3.
Open the line clamp on the ac input cover and insert the line cord through the opening.
4.
Position the power cord so that the clamp is near the end of the outside insulating sheath
on the power cord. Tighten the screws to secure the clamp.
5.
Secure the three ac lines to the ac power strip as follows:
Phase 1 to L1 (black).
Phase 2 to L2 (red).
Phase 3 to L3 (orange).
6.
Secure the ground wire (green) to the chassis earth ground terminal.
7.
Slip the safety cover over the ac input terminal strip and secure the cover with the four
screws.
8.
If required, wire the appropriate power plug to the other end of the power cord. For usermade cables, strip back the sheath 10 cm (4 in).
17
2 - Installation
2
CAUTION
7
LINE RATING
WARNING
F1
F2
WARNING
F3
L1
L2
L3
3
1
6
4
5
10cm (4 in.)
Figure 2-2. Connecting the Power Cord
Output Connections
The power output terminal block has a termination for each of the output phases (φ1, φ2, φ3 ) and a
floating neutral line (COM) for the phase return connections. A separate earth ground terminal ( ⊥) is
located near the output terminals.
Figure 2-3. Output Connections
18
Installation - 2
NOTE:
To minimize the possibility of instability on the output, keep load leads as short as
possible bundle or twist the leads tightly together to minimize inductance
Wire Considerations
Current Ratings
Fire Hazard
To satisfy safety requirements, load wires must be large enough not to overheat
when carrying the maximum short-circuit current of the ac source. If there is more
than one load, then any pair of load wires must be capable of safely carrying the
full-rated current of the ac source.
Table 2-1 lists the characteristics of AWG (American Wire Gage) copper wire.
Table 2-1. Ampacity and Resistance of Stranded Copper Conductors
AWG No.
Ampacity1
Resistance2
Resistance2
(Ω/m)
(Ω/m)
14
25
0.0103
6
80
0.0016
12
30
0.0065
4
105
0.0010
10
40
0.0041
2
140
0.00064
8
60
0.0025
1/0
195
0.00040
NOTES:
1. Ampacity is based on 30°C ambient temperature with conductor rated at 60°C. For ambient
temperature other than 30°C, multiply the above ampacities by the following constants:
Constant
Temp. (°C)
Temp. (°C)
Temp. (°C)
AWG No.
Ampacity1
21-25
1.08
26-30
1.00
31-35
0.91
36-40
0.82
2. Resistance is nominal at 75 °C wire temperature.
41-45
46-50
51-55
0.71
0.58
0.41
Voltage Drops
The load wires must also be large enough to avoid excessive voltage drops due to the impedance of the
wires. In general, if the wires are heavy enough to carry the maximum short circuit current without
overheating, excessive voltage drops will not be a problem. The voltage drops across the load wires
should be limited to less than 2% of the output voltage.
Refer to Table 2-1 if you need to calculate the voltage drop for some commonly used AWG copper wire.
19
2 - Installation
Remote Sense Connections
Under normal operation, the ac source senses the output voltage at the output terminals on the back of the
unit. External sense terminals are available on the back of the unit that allow the output voltages to be
sensed at the load, compensating for impedance losses in the load wiring. As shown in the following
figure:
♦
Connect the phase 1 (φ1) through phase 2 (φ) sense terminals to the side of the load that connects
to the corresponding output terminal.
♦
Connect the Neutral (COM) sense terminal connector to the neutral side of the load.
♦
Twist and shield all signal wires to and from the sense connectors.
The sense leads are part of the ac source’s feedback path and must be kept at a low resistance in order to
maintain optimal performance. Connect the sense leads carefully so that they do not become opencircuited. If the sense leads are left unconnected or become open during operation, the ac source will
regulate at the output terminals, resulting in a 3% to 5% increase in output over the programmed value.
Set the ALC command to EXT (external) to enable remote sensing. The ALC command is located under
the Voltage key as explained in Chapter 4. Set the ALC command to INT (internal) to disable remote
sensing.
COM
φ3
φ2
φ1
NOTE: Phase 2 and phase 3 connections are
not available on 6814B/6843A units.
Connector and connections are
rotated 180 degrees for 6843A.
φ 1 LOAD
φ1
φ 2
φ 2 LOAD
φ3
COM
φ 3 LOAD
⊥
Figure 2-4. Remote Sense Connections
20
Installation - 2
OVP Considerations
The overvoltage protection circuit senses voltage near the output terminals, not at the load. Therefore the
signal sensed by the OVP circuit can be significantly higher than the actual voltage at the load. When
using remote sensing, you must program the OVP trip voltage high enough to compensate for the voltage
drop between the output terminals and the load.
Output Rating
In remote sense applications, the voltage drop in the load leads subtracts from the available load voltage
(see "Remote Sensing Capability" in appendix A). As the ac source increases its output to overcome this
voltage drop, the sum of the programmed voltage and the load-lead drop may exceed the ac source’s
maximum voltage rating. This will not damage the unit, but may trip the OV protection circuit, which
senses the voltage at the output terminals.
Trigger Connections
The BNC trigger connectors on the rear panel let you apply trigger signals to the ac source as well as
generate trigger signals from the ac source. The electrical characteristics of the trigger connectors are
described in appendix A. More information on programming external triggers is found in Chapter 4 of
the ac source Programming Guide.
Trigger IN
Trigger OUT
Allows negative-going external trigger signals to trigger the ac source.
Generates a negative-going pulse when the selected transient output has occurred.
Digital Connections
This connector, which is on the rear panel, is for connecting the fault and the inhibit signals. The fault
(FLT) signal is also referred to as the DFI signal in the front panel and SCPI commands. The inhibit
(INH) signal is also referred to as the RI signal in the front panel and SCPI commands.
The connector accepts wires sizes from AWG 22 to AWG 12. Disconnect the mating plug to make your
wire connections. The electrical characteristics of the digital connectors are described in appendix A.
More information on programming the digital connectors is found in Chapter 4 of the ac source
Programming Guide.
NOTE:
It is good engineering practice to twist and shield all signal wires to and from the digital
connectors
The following examples show how you can connect the FLT/INH circuits of the ac source.
In example A, the INH input connects to a switch that shorts pin + to pin ⊥ whenever it is necessary to
disable output of the unit. This activates the remote inhibit (RI) circuit, which turns off the ac output. The
front panel Prot annunciator comes on and the RI bit is set in the Questionable Status Event register. To
re-enable the unit, first open the connection between pins + and ⊥ and then clear the protection circuit.
This can be done either from the front panel or over the GPIB /RS-232.
21
2 - Installation
In example B, the FLT output of one unit is connected to the INH input of another unit. A fault condition
in one of the units will disable all of them without intervention either by the controller or external
circuitry. The controller can be made aware of the fault via a service request (SRQ) generated by the
Questionable Status summary bit.
NOTE: Diagram is correct for 6814B/6834B.
Connector and connections are rotated 180
degrees for 6843A
FLT
INH
+ - +
+ - +
-
....
-
FLT Output
FLT
INH
+ - +
+ - +
-
INH Input
....
-
+ -+
INH Input
-
INH Common
INH Input
Switch
(Normally
Open)
FLT Output
A) INH Example with One Unit
B) FLT Example with Multiple Units
Figure 2-5. FLT/INH Examples
Controller Connections
The ac source connects to a controller either through a GPIB or an RS-232 connector.
GPIB Connector
Each ac source has its own GPIB bus address. AC sources may be connected to the bus in series
configuration, star configuration, or a combination of the two. You may connect from 1 to 15 ac sources
to a controller GPIB interface.
NOTE:
22
The ac source is shipped from the factory with its GPIB address set to 5. This address
can be changed as described in Chapter 4 of this guide.
Installation - 2
RS-232 Interface
The ac source provides an RS-232 programming interface, which is activated by commands located under
the front panel Address key. When the RS-232 interface is selected, the GPIB interface is disabled.
NOTE:
Sending or receiving data over the RS-232 interface when not configured for REMOTE
operation can cause unpredictable results. Always make sure the ac source is configured
for remote operation when using the RS-232 interface.
Interface Commands
All SCPI commands are available through RS-232 programming. The SYSTem:LOCal,
SYSTem:REMote, and SYSTem:RWLock commands are only available through the RS-232 interface.
SYSTem:LOCal
keys
Places the ac source in local mode during RS-232 operation. The front panel
are functional.
SYSTem:REMote
Places the ac source in remote mode during RS-232 operation. All front panel
keys except the Local key are disabled.
SYSTem:RWLock
Places the ac source in remote mode during RS-232 operation. All front panel
keys including the Local key are disabled.
RS-232 Data Format
♦
♦
♦
♦
constant 11-bit data format
one start bit
seven data bits plus a parity bit (even or odd parity), or eight data bits without parity
(parity bit is "0")
two stop bits
You can specify one of the following baud rates: 300 600 1200 2400 4800 9600
NOTE:
The ac source always uses one start bit and two stop bits regardless of the baud rate. The
number of start and stop bits is not programmable.
RS-232 Connector
The RS-232 connector is a DB-9, male connector. You can connect the ac source to any computer or
terminal with a properly configured DB-25 connector. You can use a standard Agilent 24542G or
24542H interface cable.
Table 2-2. RS-232 Connector
1 2 3 4 5
6 7 8 9
Pin
1
2
3
4
5
6
7
8
9
Input/Output
Output
Input
Output
Output
Common
Input
Output
Description
Reserved for service use
Receive Data (RxD)
Transmit Data (TxD)
Data Terminal Ready (DTR)
Signal ground
Data Set Ready (DSR)
no connection
no connection
Reserved for service use
23
2 - Installation
Hardware Handshake
The RS-232 interface uses the DTR (data terminal ready) line as a holdoff signal to the bus controller.
When DTR is true, the bus controller may send data to the ac source. When DTR goes false, the bus
controller must stop sending data within 10 characters, and must not send any more data until DTR goes
true again. The ac source sets DTR false under two conditions.
1.
When the input buffer is full (approximately 100 characters have been received), it will set DTR
false. When enough characters have been removed to make space in the input buffer, DTR will
be set to true, unless condition 2 (see below) prevents this.
2.
When the ac source wants to "talk", which means that it has processed a query, and has seen a
<newline> message terminator, it will set DTR false. This implies that once a query has been
sent to the power source, the bus controller should read the response before attempting to send
more data. It also means that a <newline> must terminate the command string. After the response
has been output, the ac source will set DTR true again, unless condition #1 prevents this.
The ac source monitors the DSR (data set ready) line to determine when the bus controller is ready to
accept data. It checks this line before each character is sent, and the output is suspended if DSR is false.
When DSR goes true, transmission will resume. The ac source will leave DTR false while output is
suspended. A form of deadlock exists until the bus controller asserts DSR true to allow the ac source to
complete the transmission.
Control-C is the equivalent to the GPIB device clear command. It clears the operation in progress and
discards any pending output. For the control-C character to be recognized by the power source while it
holds DTR false, the bus controller must first set DSR false.
Null modem RS-232 interface cables swap the DTR and DSR lines as shown in the following figure. For
other bus controllers or languages, you must determine what form of hardware handshake is used. You
may have to build a customized cable to connect the holdoff lines as necessary. If your bus controller
does not use hardware handshaking, tie the DSR input to the ac source to a signal that is always true.
This implies that your bus controller must always be ready to accept data. You may want to set the baud
rate to either 2400 or 4800 baud to ensure that this is true.
bus controller
ac source
TxD (3)
TxD (3)
RxD (2)
RxD (2)
*DTR (4)
DTR (4)
*DSR (6)
DSR (6)
Ground (5)
Ground (5)
Figure 2-7. Null Modem Interface Lines
Response Data Terminator
All RS-232 response data sent by the ac source is terminated by the ASCII character pair <carriage
return><newline>. This differs from GPIB response data which is terminated by the single character
<newline>.
24
3
Turn-On Checkout
Introduction
Successful tests in this chapter provide a high degree of confidence that the ac source is operating
properly. For verification tests, see appendix B. Complete performance tests are given in the Service
Guide.
NOTE:
This chapter provides a preliminary introduction to the ac source front panel. See
Chapter 4 for more details.
Preliminary Checkout
WARNING:
LETHAL VOLTAGES. Ac sources can supply 425 V peak at their output. DEATH
on contact may result if the output terminals or circuits connected to the output are
touched when power is applied.
1.
If you have not already done so, connect the power cord to the ac source and plug it in.
2.
Turn the front panel power switch to ON (1).
3.
The ac source undergoes a self-test when you turn it on. The following items appear on the
display:
a. A brief pattern that lights all display segments, followed by the model number and the
software revision number.
b. The display then goes into the meter mode with the Dis annunciator on, and all others off.
"Meter mode" means that the VOLTS digits indicate the output voltage and the FREQ digits
indicate the output frequency. The voltage will be at or near zero and the frequency will be at 60
Hertz.
NOTE:
If the ac source detects an error during self-test, the Err annunciator on the display will
be lit. Pressing the Shift and Error keys will show the error number. Go to "In Case of
Trouble" at the end of this chapter.
4.
Check that the ac source fan is on. You should be able to hear the fan and feel the air coming
from the unit.
5.
Press Output on/off once. The Dis annunciator will go off and the CV annunciator will go on.
If the programmed voltage is less than 20% of the voltage range, the Unr annunciator may go on.
6.
Turn the unit off.
25
3 - Turn-On Checkout
Using the Keypad
(shift)
p
Ë
And
and
q
Ì
É
Some of the front panel keys perform two functions, one labeled in black and
the other in blue. You access the blue function by first pressing the blue
shift key. Release the key after you press it. The Shift annunciator will be on,
indicating that you have access to any key’s shifted function.
These keys let you scroll up and down through the choices in the presently
selected function menu. All menu lists are circular; you can return to the
starting position by continuously pressing either key.
These keys let you select the previous or the next parameter for a specific
command. If the command has a numeric range, these keys increment or
decrement the existing value.
The backspace key is an erase key. If you make a mistake entering a digit and
have not yet pressed Enter, you can delete the digit by pressing ­. Delete
more digits by repeatedly pressing this key.
Enter
Executes the entered value or parameter of the presently accessed command.
Until you press this key, the parameters you enter with the other keys are
displayed but not entered into the ac source. After pressing Enter, the ac
source returns to Meter mode in most cases. In Harmonic or List mode, the ac
source displays the next point in the list.
Checkout Procedure
WARNING:
LETHAL VOLTAGES. Ac sources can supply 425 V peak at their output. DEATH
on contact may result if the output terminals or circuits connected to the output are
touched when power is applied.
The output test requires that you connect light bulbs to the output of the unit and apply a
potentially hazardous voltage of 120 Vac. Properly shield all connections and wires.
The test in this section checks for output voltage and current on the ac source by having you connect light
bulbs to the output of the unit. The following equipment is recommended for performing this output
checkout procedure:
♦
1 - 100 W light bulb for Agilent 6814B/6843A; 3 - 100 W light bulbs for Agilent 6834B
♦
1 - light bulb socket for Agilent 6814B/6843A; 3 - sockets for Agilent 6834B
♦
wires for connecting socket to the unit
NOTE:
26
When the ac source is turned on as shipped from the factory, it asserts the *RST state.
You can subsequently program the unit to turn on according to the state stored in *RCL
location 0, as explained in Chapter 4. The following procedures assume that the unit
turns on in the *RST state.
Turn-On Checkout - 3
Make sure that the unit is turned off, and make the following connections to the output. If you are
verifying a single phase source, you only need to connect one bulb.
Figure 3-1.Verification Connections
Procedure
Display
Explanation
1.
Turn the unit on.
Meter mode
Meter mode is active and the Dis annunciator should be
on.
2.
Press the Voltage key.
VOLT 0.00
Display indicates the default settings.
If you are verifying a three phase source, all phase
annunciators should be on.
3.
Press Phase Select
until only φ1 is lit.
VOLT 0.00
Single phase units use only phase 1.
4.
Press 1, 2, 0, Enter
VOLT 120
5.
Press Output On/Off
120 V
60 Hz
Programs the output on phase 1 to 120 Vrms. After the
value is entered, the display returns to Meter mode,
which indicates that no voltage is applied to the output.
Turns the output on and applies 120 volts to the phase 1
light bulb. The Dis annunciator should be off and CV
should be on.
If you are verifying three phase sources, repeat steps 2 through 4 for phase 2 and phase 3. All three
light bulbs should be lit when this action is complete.
Continue with step 6 of you are verifying three phase sources. Otherwise skip to step #10.
6.
Press the Voltage key.
VOLT 120
7.
Press Phase Select
until all phase
annunciators are lit
VOLT 120
8.
Press 0, Enter
9.
Press Voltage 1, 2, 0,
Enter
10.
Press Protect
VOLT 0
Turns off all light bulbs connected to the three-phase
source.
VOLT 120
Turns on all light bulbs connected to the three-phase
source.
PROT:CLEAR
Display accesses the protection menu list.
27
3 - Turn-On Checkout
Procedure
Display
Explanation
11.
Press  or ô and scroll
to the VOLT:PROT item
VOLT:PROT 500
Display shows the overvoltage protection trip voltage
for your unit. The overvoltage protection voltage is
programmed in peak, not rms volts.
12.
Press 1, 6, 0, Enter
VOLT:PROT 160
Programs the OVP to 160 Vpeak, the rms value of
which is less than the previously set rms voltage.
0 V 60 Hz
Because the peak OVP voltage entered was less than the
rms output voltage, the OVP circuit tripped. The output
dropped to zero, CV turned off, and Prot turned on.
VOLT:PROT 320
Programs the OVP to a peak value that is greater than
the rms output voltage value.
Note: You cannot clear an OVP trip until you have first
removed the cause of the condition.
13.
Press Protect, scroll to
the VOLT:PROT item,
and press 3, 2, 0, Enter
14.
Press Protect, and
Enter
120 V 60 Hz
Executes the PROT:CLEAR command, restoring the
output. Prot turns off and CV turns on.
15.
Press Shift, and
Current
CURR:LEV 5
Indicates the default output current limit setting.
16.
Press . 5 Enter
CURR:LEV .5
Sets the current limit to .5 amperes. The CC
annunciator is on, indicating that the unit is in current
limit mode and the light bulbs are dimmer because the
output voltage has dropped in its attempt to limit output
current.
17.
Press Protect, scroll to
the CURR:PROT item,
and press ° to select ON.
Then press Enter.
CURR:PROT ON
You have enabled the overcurrent protection circuit.
The circuit then tripped because of the output short. The
CC annunciator turns off and the OCP and Prot
annunciators come on. The output current is near zero.
18.
Press Output On/Off
0.5 V 60 Hz
19.
Press Protect, scroll to
the CURR:PROT item,
press ° to select OFF,
then press Enter.
CURR:PROT OFF
20.
Turn the unit off.
28
The output is off and the Dis annunciator turns on.
You have disabled the overcurrent protection circuit.
The Prot annunciator turns off.
The next time the unit turns on it will be restored to the
*RST or factory default state
Turn-On Checkout - 3
In Case of Trouble
Error Messages
Ac source failure may occur during power-on selftest or during operation. In either case, the display may
show an error message that indicates the reason for the failure.
Selftest Errors
Pressing the Shift and Error keys will show the error number. Selftest error messages appear as:
ERROR <n>, where "n" is a number listed in the following table. If this occurs, turn the power off and
then back on to see if the error persists. If the error message persists, the ac source requires service.
Table 3-1. Power-On Selftest Errors
Error No.
Failed Test
Error 0
Error 1
Error 2
Error 3
Error 4
Error 5
Error 6
Error 10
Error 11 to 18
No error
Non-volatile RAM RD0 section checksum failed
Non-volatile RAM CONFIG section checksum failed
Non-volatile RAM CAL section checksum failed
Non-volatile RAM WAVEFORM section checksum failed
Non-volatile RAM STATE section checksum failed
Non-volatile RAM LIST section checksum failed
RAM selftest
DAC selftest 1 to 8
Runtime Error Messages
Under unusual operating conditions, the front panel display may show OVLD. This indicates that the
output voltage or current is beyond the range of the meter readback circuit. If the front panel display
indicates -- -- -- -- -- -- , a GPIB measurement is in progress. Appendix C lists other error messages that
may appear at runtime.
Line Fuse
If the ac source appears "dead" with a blank display and the fan not running, first check your power
source to be certain line voltage is being supplied to the ac source. If the power source is normal, the ac
source line fuse may be defective. If the ac source has a defective fuse, replace it only once. If it fails
again, investigate the reason for the failure. Proceed as follows:
1.
Turn off the front panel power switch and remove the input power (unplug the power cord or
open the safety disconnect).
2.
Remove the fuse cover from the rear panel.
3.
Unscrew the fuse caps and remove the fuses.
4.
If any fuses are defective, replace all three with fuses of the same type (see Chapter 1).
5.
Turn on the ac source and check the operation. If it is normal. replace the fuse cover.
Maintenance Note: It is recommended that new fuses be installed every four years.
29
4
Front panel Operation
Introduction
Here is what you will find in this chapter:
♦
♦
a complete description of the front panel controls
front panel programming examples that describe:
• how to program the output voltage and frequency
• how to measure the output
• how to program the output pulses and lists
• how to trigger output changes
Front Panel Description
Figure 4-1. Front Panel, Overall View
31
4 - Front Panel Operation
j Display
k Annunciators
l Voltage/
Frequency
14-character vacuum fluorescent display for showing programmed commands
and measured values.
Annunciators light to indicate operating modes and status conditions:
φ1, φ2, φ3 Phase 1, 2, or 3 is being controlled or metered.
CV
The ac source output is in constant-voltage mode.
CC
The ac source output is in constant-current mode.
Unr The ac source output is in an unregulated state.
Dis
The ac source output is disabled (off).
Tran The ac source output is initialized to output a transient.
OCP The overcurrent protection state is enabled.
Prot One of the ac source’s output protection features is activated.
Cal The ac source is in calibration mode.
Shift The Shift key is pressed to access an alternate key function.
Rmt The selected interface (GPIB or RS-232) is in a remote state.
Addr The interface is addressed to talk or to listen.
Err There is a message in the SCPI error queue.
SRQ The interface is requesting service from the controller.
Meter Front panel measurement functions are: ac only, dc only, or ac+dc
AC+DC
Output The ac source output coupling is: ac only, or ac+dc
AC+DC
The rotary pulse generators let you set the output voltage and frequency when the
ac source is in local mode. Their response is rate sensitive.
Turning a control rapidly provides coarse control of the value.
Turning a control slowly provides fine control of the value.
n Line
o System Keys
This turns the ac source on or off.
p Function Keys
Function access command menus that let you:
Program output voltage, current limit, frequency, and output waveforms
Turn the output on and off
Select metering functions
Send immediate triggers from the front panel
Program transient output functions
Set and clear protection functions
Select output phases
Select the coupling for output and meter functions
Monitor instrument status
q Entry Keys
Entry keys let you:
Enter programming values
Increment or decrement programming values
Calibrate the ac source
32
The system keys let you:
Return to Local mode (front panel control)
Set the ac source GPIB address
Set the RS-232 interface communication baud rate and parity bit
Display SCPI error codes and clear the error queue
Save and recall up to 4 instrument operating configurations
Front Panel Operation - 4
System Keys
Refer to the examples later in this chapter for more details on the use of these keys.
SYSTEM
Local
Error
Address
Save
Recall
Figure 4-2. System Keys
This is the blue, unlabeled key, which is also shown as Shift in this guide.
Pressing this key accesses the alternate or shifted function of a key (such as
ERROR ). Release the key after you press it. When the Shift annunciator is lit,
the shifted keys are active.
Local
Press to change the ac source’s selected interface from remote operation to local
(front panel) operation. Pressing the key will have no effect if the interface state
is already Local, Local-with-Lockout, or Remote-with-Lockout.
Address
Press to access the system address menu. This menu lets you configure the ac
source’s interface and other system parameters. Address Menu entries are stored
in non-volatile memory.
Display
Command Function
ADDRESS <value>
INTF <char>
BAUDRATE<value>
PARITY <char>
LANG <char>
NOUTPUTS <char>
Sets the GPIB Address
Selects an interface (GPIB or RS232)
Selects baud rate (300, 600, 1200, 2400, 4800, 9600)
Message parity (NONE, EVEN, ODD, MARK, SPACE)
Selects language (SCPI or E9012)
Select number of output phases on Agilent 6834B only (1 or 3)
value = a numeric value
char = a character string parameter
Use p
and q
to scroll through the command list.
Use Ë
and Ì
to scroll through the parameter list.
Recall
Press to place the ac source into a previously stored state. You can recall up to
16 (0 through 15) previously stored states.
Shift
Error
Press to display the system error codes stored in the SCPI error queue. This
action also clears the queue. If there is no error in the queue, 0 is displayed.
Shift
Save
Press to store an existing ac source state in non-volatile memory. The parameters
saved are listed under *SAV in the ac source Programming Guide. You can
save up to 16 states (0 through 15).
33
4 - Front Panel Operation
Function Keys
Refer to the examples later in this chapter for more details on the use of these keys.
FUNCTION
Harmonic
Meter
Output
Input
Index
Current
Voltage
Phase
Index
Freq
Status
Protect
Shape
Trigger
List
Trigger
Control
Pulse
Phase
Select
Output
on/off
Figure 4-3. Function Keys
Immediate Action Keys
Immediate action keys immediately execute their corresponding function when pressed. Other function
keys have commands underneath them that are accessed when the key is pressed.
Output
On/Off
This key toggles the output of the ac source between the on and off states. It
immediately executes its function as soon as you press it. When off, the ac
source output is disabled and the Dis annunciator is on.
Phase
Select
This key only applies to three-phase ac sources. It selects the phase to which
function commands will be sent, as well as the phase that will be monitored by
the Meter and Harmonic functions. At power-on, all phases are selected or
coupled, indicating that commands will be sent to all phases. The presently
selected phase is indicated by a phase annunciator. Pressing Phase Select
immediately selects a different phase. Phase selection is circular; you can return
to the starting position by continuously pressing Phase Select.
Annunciator On
Phase Selected
φ1, φ2, φ3
All phases selected (phases coupled= ALL) 1
φ1
Phase #1 selected (phases coupled= NONE)
φ2
Phase #2 selected (phases coupled= NONE)
φ3
Phase #3 selected (phases coupled= NONE)
1
Does not apply to Meter or Harmonic functions.
When the Meter and Harmonic functions are active, Phase Select only rotates
through 1, 2, and 3. This is because the Meter and Harmonic functions cannot
display multiple phase readings simultaneously. Therefore, it is not possible to
select all phases with these functions.
Shift
34
Trigger
Sends an immediate trigger to the ac source
Front Panel Operation - 4
Scrolling Keys
Scrolling keys let you move through the commands in the presently selected function menu.

ô
Shift
pIndex
qIndex
¯
°
Shift
These scroll keys let you move through the choices in a command list.
Press q
to bring up the next command in the list. Press p
to go back
to the previous command in the list. Function menus are circular; you can
return to the starting position by continuously pressing either key. The
following example shows the commands in the Input function menu:
These shifted scroll keys apply only to the Harmonic and List functions.
Press these keys to step through integers 0 through 50 when specifying the
desired harmonic number, or 0 through 99 when specifying the desired list
point. Hold down these keys to rapidly access any harmonic or list point.
These Entry keys let you scroll through choices in a parameter list that apply
to a specific command. Parameter lists are circular; you can return to the
starting position by continuously pressing either key. If the command has a
numeric range, these keys increment or decrement the existing value.
Meter Display Keys
Metering keys control the metering functions of the ac source.
Meter
Input
Press this key to access the meter menu list.
Display
Measurement
<reading>V <reading>Hz
<reading>V <reading>A
<reading>A <reading>Hz
<reading>V <reading>W
<reading> CREST F
<reading>A PK REP
<reading>A PK NR
<reading> VA
<reading> VAR
<reading>W TOTAL
<reading> PFACTOR
<reading>A NEUTRAL
rms voltage and frequency (the default)
rms voltage and rms current
rms current and frequency (the default)
rms voltage and power
current crest factor
peak current, repetitive
peak current, nonrepetitive1
apparent power
reactive power
total power of all phases2
power factor
neutral rms current2
Press this key to specify the following metering functions.
Display
Command Function
INP:COUP <char>
WINDOW <char>
Choose meter coupling (AC, DC or ACDC)
Select harmonic measurement window meter
(KBESSEL, RECT)
Notes:
1
Displays the highest peak current since it was last cleared. The value is cleared when
you scroll into this selection or press Enter or Clear Entry
2
This selection only valid for Agilent 6834B
reading = the returned measurement
char = a character string parameter
p and q scroll through the command list.
¯ and ° scroll through the parameter list.
35
4 - Front Panel Operation
Shift
Harmonic
Press this key to access the harmonic menu list
Display
Measurement
<reading>A I:MAG: <index>
<reading>° I:PHASE: <index>
<reading>V V:MAG: <index>
<reading>° V:PHASE: <index>
<reading> N:MAG: <index>
<reading>° N:PHASE: <index>
<reading>° CURR:THD
<reading>° VOLT:THD
current harmonic magnitude
current harmonic phase
voltage harmonic magnitude
voltage harmonic phase
neutral current harmonic magnitude
neutral current harmonic phase
current total % harmonic distortion
voltage total % harmonic distortion
Output Control Keys
Output control keys control the output functions of the ac source.
Voltage
Shift
Freq
Press this key to access the voltage menu list.
Current
Display
Command Function
VOLT <value>
VOLT:T<value>
VOLT:M <char>
RANGE <char>
SLEW <value>
SLEW:T<value>
SLEW:M <char>
ALC <char>
Set immediate rms output voltage (φ)
Set triggered rms output voltage (φ)
Select the voltage mode (φ) (FIXED, STEP, PULSE or LIST)
Select the voltage range (φ) (150 or 300)
Set immediate voltage slew rate in volts/second (φ)
Set triggered voltage slew rate in volts/second (φ)
Select the voltage slew mode (φ) (FIXED, STEP, PULSE or LIST)
Select the voltage sense source (INT or EXT)
Press this key to access the current menu list.
Display
Command Function
CURR:LEV <value>
Set immediate rms output current limit
Press this key to access the frequency menu list.
Display
Command Function
FREQ <value>
Set immediate output frequency
FREQ:T<value>
Set triggered output frequency
FREQ:M <char>
Select the frequency mode (FIXED, STEP, PULSE or LIST)
SLEW <value>
Set immediate frequency slew rate in volts/second
SLEW:T<value>
Set triggered frequency slew rate in volts/second
SLEW:M <char>
Select the frequency slew mode (FIXED, STEP, PULSE or LIST)
Notes:
φ = phase selectable on Agilent 6834B
reading = the returned measurement
index = a numeric value that represents the harmonic number from 0 to 50
char = a character string parameter
p and q scroll through the command list.
¯ and ° scroll through the parameter list.
pIndex and qIndex specify the desired harmonic.
36
Front Panel Operation - 4
Shift
Phase
Press this key to access the phase menu list.
Display
Command Function
PHASE <value>
PHASE:T <value>
PHASE:M <char>
Press this key to access the shape menu list.
Display
Command Function
Shape
SHAPE <char>
SHAPE:T <char>
SHAPE:M <char>
CLIP <value>
Select the immediate output wave shape 1 (SINE, SQUARE,
or CSINE) CSIN = clipped sine wave
Select the triggered output wave shape (SINE, SQUARE, or
CSINE) CSIN = clipped sine wave
Select the shape mode (FIXED, STEP, PULSE or LIST)
Set the clipping level of the CSIN wave shape. This
specifies the point where clipping starts as a percentage of
the peak amplitude or percentage of THD.
Press this key to access the pulse menu list.
Display
Command Function
Pulse
WIDTH <value>
COUNT <value>
DCYCLE <value>
PER <value>
HOLD <char>
Shift
Set immediate output phase (φ)
Set triggered output phase (φ)
Select the phase mode (φ) (FIXED, STEP, PULSE or LIST)
Output
Set the pulse width
Set the number of output pulses
Set the pulse duty cycle as a percentage of the pulse period
Set the pulse period
Set the parameter that will be held constant as the other
parameters change (WIDTH or DCYCLE)
Press this key to access the output menu list.
Display
Command Function
*RST
TTLT:SOUR <char>
TTLT:STATE <value>
PON:STATE <char>
RI <char>
DFI <char>
DFI:SOUR <char>
Execute *RST command to place the ac source in the
factory-default state
Select Trigger Out source coupling (BOT, EOT or LIST)
BOT = beginning of transient
EOT = end of transient
LIST = TTLT trigger (see Programming Guide)
Set Trigger Out state (ON or OFF)
Select power-on state command (RST or RCL0)
Sets remote inhibit mode (LATCHING, LIVE, or OFF)
Sets discrete fault indicator state (ON or OFF)
Select the DFI source (QUES, OPER, ESB, RQS, or OFF)
(see Chapter 4 of Programming Guide)
Notes:
User defined waveshapes will also appear in this list when created.
φ = phase selectable on Agilent 6834B
value = a numeric value
char = a character string parameter
p and q scroll through the command list.
¯ and ° scroll through the parameter list.
1
37
4 - Front Panel Operation
Protection and Status Control Keys
The Protect and Status keys control the protection functions and status registers of the ac source. Refer to
Chapter 4 of the Programming guide for more information on the status registers.
Protect
Press this key to access the protection menu list.
Display
Command Function
PROT:CLEAR
Clear the status registers of all activated protection signals.
The fault causing a signal must be corrected or removed
before the register can be cleared.
Set overcurrent protection function (ON or OFF).
Set the overvoltage protection level1
Set the time delay for activating a protection fault after
programming the output
CURR:PROT <char>
VOLT:PROT <value>
DELAY <value>
Shift
Status
Press this key to access the status menu list. Note that in the following list, commands
ending in ? clear the registers when they are read. For this reason the registers are read
only after you press Enter , not when you scroll to the command
Display
Command Function
*CLS
STATUS:PRESET
*ESR? <value>
*STB <value>
OPER:EVEN? <value>
OPER:COND <value>
QUES:EVEN? <value>
QUES:COND <value>
Executes the clear status (*CLS) command
Execute the STATus:PRESet command
Return Event Status register value
Return Status Byte register value
Return STAT:OPER:EVENT? value
Return STAT:OPER:COND? value
Return STAT:QUES:EVENT? value
Return STAT:QUES:COND? value
Notes:
1
Programmed in peak volts. (Other voltage parameters are programmed in rms volts)
value = a numeric value
char = a character string parameter
p and q scroll through the command list.
¯ and ° scroll through the parameter list.
38
Front Panel Operation - 4
Trigger and List Control Keys
The Trigger Control key controls output transient triggers. The List key controls the generation of output
lists. A list can contain up to 100 points, each of which can specify an output change (or transient). Refer
to Chapter 4 of the Programming Guide for more information about programming triggers and lists.
Trigger
Control
Press this key to access the trigger control menu list.
Display
Command Function
INIT:IMMED
INIT:CONT <char>
TRIG:SOUR <char>
Initiate the transient trigger sequence immediately.
Set continuous trigger initiation (ON or OFF).
Select transient trigger source (BUS, EXT, TTLT or
IMM).
Set trigger delay in seconds.
Abort all trigger sequences.
Select trigger sync source (PHASE or IMM).
Set synchronous phase reference angle in degrees.
DELAY <value>
ABORT
SYNC:SOUR <char>
SYNC:PHASE <value>
Shift
List
Press this key to access the list commands
Display
Command Function
COUNT <value>
DWEL:<index> <value>
FREQ:<index> <value>
FSLW:<index> <value>
PHASE:<index> <value>
SHAP:<index> <char>
Specifies the number of times a list repeats.
List of output dwell times.
List of output frequencies.
List of output frequency slew rates
List of output voltage phase angles (φ)
List of output waveform shapes.1
(SINE, SQUARE or CSIN) CSIN = clipped sine wave
Response of list to triggers (ONCE or AUTO).
List of Trigger Out pulses (0=no pulse; 1=pulse).
List of ac output voltages (φ)
List of output voltage slew rates (φ)
STEP<char>
TTLT:<index> <value>
VOLT:<index> <value>
VSLW:<index> <value>
Notes:
User-defined waveshapes will also appear in this list when created.
φ = phase selectable on Agilent 6834B
value = a numeric value
char = a character string parameter
index = a numeric value that represents a list point from 0 to 99
p and q scroll through the command list.
¯ and ° scroll through the parameter list.
pIndex and qIndex scroll through the desired list points. EOL is displayed when the
end of the list is reached. When a value is edited, pressing Enter automatically
advances to the next list point. Pressing Clear Entry truncates or clears the list at the
presently displayed list point.
1
39
4 - Front Panel Operation
Entry Keys
Refer to the examples later in this chapter for more details on the use of these keys.
ENTRY
Calibration
7
8
9
4
5
6
1
2
3
-
Clear Entry
E
0
Enter
.
Figure 4-4. Entry Keys
Ë
0
Ì
−
9
.
­
These keys let you scroll through choices in a parameter list that apply to a
specific command. Parameter lists are circular; you can return to the starting
position by continuously pressing either key. If the command has a numeric
range, these keys increment or decrement the existing value.
0
through 9 are used for entering numeric values.
point. For example, to enter 33.6 press: 3 3 . 6 Enter.
.
is the decimal
The backspace key deletes the last digit entered from the keypad. This key lets
you correct one or more wrong digits before they are entered.
Enter
This key executes the entered value or parameter of the presently accessed
command. Until you press this key, the parameters you enter with the other
Entry keys are displayed but not entered into the ac source. Before pressing
Enter
you can change or abort anything previously entered into the display.
After Enter is pressed, the ac source returns to Meter mode in most cases. In
Harmonic or List mode, the ac source displays the next point in the list.
Shift
E
This key specifies an exponential power of 10. For example, the value for
100µs can be entered as either . 0 0 0 1 , or as 1 E − 4
Shift
−
This key − is the minus sign.
Shift
Clear Entry
Shift
Calibration
40
This key aborts a keypad entry by clearing the value. This key is convenient for
correcting a wrong value or aborting a value entry. The display then returns to
the previously set function. When editing a list, pressing Clear Entry truncates
or clears the list at the presently displayed list point.
This key accesses the calibration menu (Refer to Appendix B to calibrate your
ac source).
Front Panel Operation - 4
Examples of Front Panel Programming
You will find these examples on the following pages:
1
Setting the output voltage amplitude
2
Setting the output frequency
3
Setting the overcurrent protection feature
4
Generating step, pulse, and list transients
5
Programming trigger delays and phase synchronization
6
Programming slew rates
7
Measuring peak inrush current
8
Setting the GPIB address or RS-232 parameters
9
Saving and recalling operating states
10
Switching between single- and three- phase operation (Agilent 6834B only)
The examples in the ac source Programming Guide are similar to the ones in this section, except that they
use SCPI commands.
1 - Setting the Output Voltage Amplitude
NOTE:
The maximum voltage that the ac source can output is limited by the peak value of the
waveform, which is 425 Vpeak. Since the output is programmed in units of rms volts, the
maximum value that can be programmed is dependent on the peak-to-rms ratio of the
selected waveform. For a sinewave, the maximum ac voltage that can be programmed is
300 Vrms. For other waveforms the maximum may be different.
Procedure for Single-Phase AC Sources
When you turn on the ac source, the default output shape is a 60 Hz sinewave at 0 Vrms. There is no
output from the ac source because the default output state is OFF, as indicated by the Dis annunciator.
Set the output to 120 V rms as follows:
Action
Display
You can set the voltage in any of three ways:
1.
On the Function keypad, press Voltage. On the Entry keypad, press 1 2 0 Enter.
This is the easiest way to enter an accurate value.
VOLT
120
2.
On the Function keypad, press Voltage. On the Entry keypad, press ¯ or ° to
increment or decrement the existing value. This technique is useful when you are
making minor changes to an existing value.
VOLT
127
3
Rotate the front panel Voltage knob to obtain 120 V. This method is best when you
want to enter a value without using the voltage menu.
120 V
60 Hz
120 V
60 Hz
Note: You will not see the new voltage on the front panel meter unless the output is
enabled.
To enable the output:
4.
On the Function keypad, press Output On/Off. The Dis annunciator will go off,
indicating that the voltage is now applied to the output terminals.
41
4 - Front Panel Operation
Procedure for Three-Phase AC Sources
If you have a three-phase ac source, you can set the rms voltage of all three phases identically, or set each
one differently. This is controlled via the Phase Select Menu on the Function keypad.
The following example shows how you can set the phase 1 output to 120 Vrms, phase 2 to 180 Vrms,
and phase 3 to 235 Vrms.
Action
Display
1.
On the Function keypad, press Voltage. Note that in the power-on default state, the
φ1, φ2, and φ3 annunciators are all lit, indicating that any command sent to the
instrument will be sent to all three phases.
VOLT
0
2.
Scroll through the phase selections by pressing Phase Select
VOLT
0
Pressing Phase Select moves you through phases 1, 2, and 3, as indicated by the
phase annunciators. Pressing it once more returns you to the first state with all three
phase annunciators on.
3.
While in the Voltage menu press Phase Select to access Phase 1. On the Entry pad
press 1 2 0 Enter.
VOLT
120
4.
Access the Voltage menu again and press Phase Select once to access Phase 2. On
the Entry pad press 1 8 0 Enter.
VOLT
180
5.
Access the Voltage menu again and press Phase Select once to access Phase 3. On
the Entry pad press 2 3 5 Enter.
VOLT
235
6.
Press Output On/Off to enable the output. The Dis annunciator will go off,
indicating that the voltages are now applied to the output terminals.
235 V
60 Hz
To verify the output, you can measure it as follows:
7.
Note that the φ3 annunciator is on, indicating that you are monitoring the last phase
you selected, which was Phase 3.
235 V
60 Hz
8.
Press Phase Select once. The φ1 annunciator will light, indicating that you are
now monitoring Phase 1.
120 V
60 Hz
9.
Press Phase Select once. The φ2 annunciator will light, indicating that you are
now monitoring Phase 2.
180 V
60 Hz
10.
Press Phase Select once. The φ3 annunciator will light, indicating that you are
now monitoring Phase 3 again.
235 V
60 Hz
NOTE:
42
The Meter menu does not go to the all-phases state present in the Phase Select menu
because the front panel can display only one phase at a time. Refer to the ac source
Programming Guide on how to return simultaneous measurements from all three phases.
Front Panel Operation - 4
2 - Setting the Output Frequency
When you turn on the ac source, the default output frequency is a 60 Hz. Assuming the voltage output
from example 1 is in effect (120 Vrms sinewave), change the frequency to 50 Hz as follows:
Action
Display
You can set the frequency in the same way that you set the voltage:
1.
On the Function keypad, press Freq. On the Entry keypad, press 5 0 Enter.
FREQ
50
2.
On the Function keypad, press Freq. On the Entry keypad, press ¯ or ° to
increment or decrement the existing value.
FREQ
50
3.
Rotate the front panel Frequency knob to obtain 50 Hz.
FREQ
50
To verify the output, you can measure it as follows:
4.
On single-phase ac sources, the φ1 annunciator is lit. On three-phase ac sources, the
phase annunciator of the last selected phase will be lit. The Meter menu is presently
displaying the measured voltage and frequency of the selected output phase.
120 V
50 Hz
You can scroll through all of the measurement functions in the Meter Menu by
pressing the  and ô keys.
3 - Setting a Protection Feature
You can set the ac source to disable its output if it detects an overvoltage or overcurrent fault condition.
Other automatic fault conditions (such as overtemperature) also will disable the output. Set the
overcurrent protection feature as follows:
Action
Display
1.
On the Function keypad, press Protect.
2.
Press ° to obtain the overcurrent command.
CURR:PROT OFF
3.
On the Entry keypad, press once to scroll to the ON parameter and press Enter. The
OCP annunciator will light, indicating that the overcurrent protection circuit is on.
CURR:PROT ON
CURR:PROT ON
If you wish to set a time delay between the detection of the fault and the disabling of
the output, scroll to the delay command on the protection menu. The default delay is
100 milliseconds.
DELAY .1
4.
PROT:CLEAR
Enter the delay from the Entry keypad, such as . 2 5 0 Enter.
DELAY .250
When you want to restore normal operation after the cause of the overcurrent
condition has been removed, scroll to the protection clear command and press
Enter. The OCP annunciator then will go off.
PROT:CLEAR
43
4 - Front Panel Operation
4 - Using Transient Voltage Modes
The ac source voltage can be programmed in the following transient operating modes:
STEP
PULSE
LIST
FIXED
causes the output to permanently change to its triggered value.
causes the output to change to its triggered value for a specific time, as determined by the
Pulse menu parameters.
causes the output to sequence through a number of values, as determined by points entered
in the List menu.
disables transient operation for the selected function.
Step Transient
The Voltage Menu lets you specify an alternate or triggered voltage level that the ac source will apply to
the output when it receives a trigger. Because the default transient voltage level is zero volts, you must
first enter a triggered voltage before you can trigger the ac source to change the output amplitude. Refer
to Chapter 4 of the Programming Guide for more information about programming triggers.
In the following example, the voltage output is set to 120 Vrms and then stepped down to 102 Vrms.
Action
Display
1.
On the Function keypad, press Output On/Off to enable the output. The Dis
annunciator will go off.
2.
Press Voltage to access the Voltage Menu. On the Entry keypad, press 1 2 0 Enter.
VOLT
3.
Access the Voltage Menu again and press ô to access the triggered voltage
command.
VOLT:T 0
4.
On the Entry keypad, press 1 0 2 Enter.
5.
Access the Voltage Menu again and press ô to access the voltage mode command. It
should be in the default FIXED mode. An ac source function in the FIXED mode
does not respond to triggers. On the Entry keypad, press ¯ or ° to scroll through
the mode parameters. When you have STEP, press Enter.
VOLT:M STEP
6.
Press Trigger Control and Enter. This initiates (or enables) one immediate trigger
action.
INIT:IMMED
7.
Press Shift Trigger. This sends the ac source an immediate trigger signal to change
the output voltage. The triggered voltage value now becomes the VOLT value.
102 V 60 HZ
0 V 60 Hz
120
VOLT:T 102
On three-phase ac sources the voltage steps are phase selectable. You can output a different voltage
step for each phase. To do this, use Phase Select to first choose the desired phase, as previously
described in example 1 for setting the immediate output voltage.
44
Front Panel Operation - 4
Pulse Transient
In the following example, the output is four 83.3-millisecond, 120 Vrms pulses at 60 Hz. The figure
shows the trigger, pulse count, pulse period, and duty cycle.
NOTE:
From the Output Menu, execute the *RST command to reset the ac source. This is
necessary because any previously programmed functions remain in effect until cleared.
Trigger
count = 4
120Vrms
102Vrms
83.3ms
250ms
Figure 4-5. Pulse Transients
Action
Display
1.
Press Voltage to access the Voltage Menu. On the Entry keypad, press 1 0 2 Enter.
VOLT
102
2.
Press ô to access the triggered voltage command. On the Entry keypad, press 1 2 0
Enter.
VOLT
120
3.
Access the Voltage Menu again and press ô to access the voltage mode command. On
the Entry keypad, press ¯ or ° to scroll through the mode parameters to obtain
PULSE and press Enter.
4.
Press Pulse to access the Pulse Menu. From the Entry keypad, press
. 0 8 3 3 Enter to enter a pulse width of 83.3 milliseconds.
WIDTH
5.
Access the Pulse Menu and press ô to access the duty cycle command. From the Entry
keypad, press 3 3 Enter to change the duty cycle to 33%.
DCYCLE
33
6.
Access the Pulse Menu and press ô to access the pulse count. On the Entry keypad,
press 4 and Enter.
COUNT
4
7.
Press Trigger Control and Enter to initiate the transient trigger sequence.
INIT:IMMED
8.
Press Shift Trigger. This sends the ac source an immediate trigger signal to generate
the four output pulses.
102 V 60 HZ
VOLT:M
PULSE
.0833
Note: The ac source output returns to 102 V at the completion of the output pulses.
On three-phase ac sources the voltage pulses are phase selectable. You can output a different voltage
pulse for each phase. To do this, use Phase Select to first choose the desired phase, as previously
described in example 1 for setting the immediate output voltage.
45
4 - Front Panel Operation
List Transient
Lists are the most flexible means of generating multiple or synchronized transient outputs. The following
figure shows a voltage output generated from a list. The output shown represents three different ac
voltage pulses (160 volts for 33 milliseconds, 120 volts for 83 milliseconds, and 80 volts for 150
milliseconds) separated by 67-millisecond, 0-volt intervals.
The list specifies the pulses as three voltage points (point 0, 2, and 4), each with its corresponding dwell
point. The intervals are three zero-voltage points (point 1, 3, and 5) of equal intervals. The count
parameter causes the list to execute twice when started by a single trigger.
NOTE:
From the Output Menu, execute the *RST command to reset the ac source. This is
necessary because any previously programmed functions remain in effect until cleared.
Trigger
160 Vrms
0
1
2
3
4
5
List Count = 1
List Count = 2
Figure 4-6. List Transients
Action
1.
Press Voltage to access the Voltage Menu. Then press ô to access the voltage mode
command.
2.
On the Entry keypad, press ¯ or ° to scroll through the mode parameters to obtain LIST
and press Enter.
3.
Access the List Menu by pressing Shift List. The first menu command is the count.
From the Entry keypad, change the list count from the default (1) to 2. Press Enter.
4.
5.
VOLT:M
FIXED
VOLT:M
LIST
COUNT
2
Access the List menu again and press ô until you access the dwell time. This specifies
the "on" time for each voltage point, which is effectively the output pulse width. The first
dwell point (0) appears in the display. On the Entry keypad, press . 0 3 3 and Enter.
DWEL 0
.033
Pressing the Enter key automatically advances to the step in the list. Enter the following
values for dwell list points 1 through 5: .067, .083, .067, .150, .067. Press Enter to
enter each value. When you finish, you will be at point 6, which is the end of the list.
DWEL
DWEL
DWEL
DWEL
DWEL
DWEL
Note: Press Shift Index or Shift ôIndex to access and edit any list point.
46
Display
1 .067
2 .083
3 .067
4 .150
5 .067
6 EOL
Front Panel Operation - 4
6.
7.
Press ô until you access the voltage list. This specifies the amplitude of each output
point during its corresponding dwell period. The first voltage list point (0) appears in the
display. On the Entry keypad, press 1 6 0 and Enter.
Pressing the Enter key automatically advances to the step in the list. Enter the following
values for voltage list points 1 through 5: 0, 120, 0, 80, 0. Press Enter to enter each
value. When you finish, you will be at point 6, which is the end of the list.
Note: Press Shift Index or Shift ôIndex to access and edit any list point.
VOLT 0
VOLT
VOLT
VOLT
VOLT
VOLT
VOLT
160
1
0
2 120
3
0
4
80
5
0
6 EOL
8.
Press ô until you access the step command. Check that it is at the default mode (AUTO).
This lets a single trigger run your list for the specified count.
9.
Press Output On/Off to enable the output. The Dis annunciator will go off.
0 V 60 Hz
10.
Press Trigger Control and Enter to initiate the transient trigger sequence.
INIT:IMMED
11.
Press Shift Trigger. This sends the ac source an immediate trigger to generate the four
output pulses. The output returns to the immediate value at the end of the list.
STEP AUTO
0 V 60 Hz
Note: To clear a list, press Clear Entry. This truncates or clears the list at the presently
displayed list point. Each list must be accessed and cleared separately.
On three-phase ac sources the voltage lists are phase selectable. You can output a different voltage list
for each phase. To do this, use Phase Select to first choose the desired phase, as previously described in
example 1 for setting the immediate output voltage.
5 - Trigger Delays and Phase Synchronization
The ac source trigger system also lets you program trigger delays as well as synchronize output changes
to a specific phase angle of the output waveform.
In example j, the output transient is triggered immediately at the receipt of the trigger signal. In example
ô, a delay time of approximately 16.7 milliseconds elapses between the occurrence of the trigger and the
start of the output transient. In example í, the trigger source is programmed for phase synchronization,
which means that the transient occurs at the first occurrence of the specified phase angle after the trigger
signal is received. Example m describes phase synchronization on three phase ac sources.
Note that phase synchronization is referenced to an internal phase signal. The output of the unit is
normally offset by 0° with respect to this internal reference. Because synchronized transient events
always occur with respect to the internal reference, the output will normally be in phase with the value
programmed for phase synchronization. (The Phase command can be used to change the offset of the
output with respect to the internal phase reference.)
47
4 - Front Panel Operation
Trigger
VOLT T level
1
VOLT level
VOLT T level
2
VOLT level
0.000
0.0167
VOLT T level
3
VOLT level
0
90
Figure 4-7. Trigger Delays and Phase Synchronization
Example
j
This example uses the default trigger parameters. First, access the Voltage
menu and program the immediate and triggered voltage levels, followed by
the voltage transient mode.
Then press Trigger Control and Enter, followed by Shift Trigger.
ô
INIT:IMMED
VOLT 120
VOLT:T
150
VOLT:M STEP
Press Trigger Control. Then press ô until you access the delay parameter.
On the Entry keypad, press . 0 1 6 7 Enter.
DELAY 0
DELAY .0167
This example uses the phase sync mode with no delay, but synchronized at 90.
First, access the Voltage menu and program the immediate and triggered
voltage levels, followed by the voltage transient mode.
INIT:IMMED
VOLT 120
VOLT:T 150
VOLT:M STEP
Press Trigger Control. Press ô until you access the delay parameter. If
necessary, set it to 0. Press ô until you access the sync source command. On
the Entry keypad, press ° to obtain PHASE. Press Enter.
DELAY 0
SYNC:SOUR PHASE
Access the Trigger Control menu again and press ô to access the sync phase
reference parameter. On the Entry keypad, program a 90° phase reference by
entering 9 0 Enter.
SYNC:PHAS 90
Then press Trigger Control and Enter, followed by Shift Trigger.
48
VOLT
120
VOLT:T
150
VOLT:M STEP
In this example, you will set a trigger delay. First, access the Voltage menu
and program the immediate and triggered voltage levels, followed by the
voltage transient mode.
Then press Trigger Control and Enter, followed by Shift Trigger.
í
Display
INIT:IMMED
Front Panel Operation - 4
On three-phase ac sources, phase 1 is normally offset by 0° from the internal phase reference while
phase 2 and phase 3 are offset by 240° and 120° respectively. Therefore, synchronized transient events
will occur at the phase angle programmed for the phase 1 output, but at different phase angles on the
phase 2 and phase 3 outputs.
This is illustrated in the following figure, where the transient occurs at the 90 ° angle programmed for the
phase 1 output, but at 330° and 210° for the phase 2 and 3 outputs, because of the default offsets for
these outputs.
Trigger
4
0
VOLT T level
01
90
VOLT level
phase = 0
VOLT T level
02
VOLT level
phase = 240
0
330
VOLT T level
03
VOLT level
0
210
phase = 120
Figure 4-8. Phase Synchronization on Three-phase Sources
Example
m
This example synchronizes a change at 90° on phase 1. First, access the
Voltage menu and program the immediate and triggered voltage levels,
followed by the voltage transient mode. Check that the φ1, φ2, and φ3
annunciators are all lit, indicating that commands will be sent to all three
phases. If not, press Phase Select until all three annunciators are lit.
Display
VOLT 120
VOLT:T 150
VOLT:M STEP
Press Trigger Control. Press ô until you access the sync source command.
On the Entry keypad, press ° once to obtain PHASE. Press Enter.
SYNC:SOUR PHASE
Access the Trigger Control menu again and press ô to access the sync phase
reference parameter. On the Entry keypad, program a 90° phase reference by
entering 9 0 Enter.
SYNC:PHAS 90
Then press Trigger Control and Enter, followed by Shift Trigger.
INIT:IMMED
49
4 - Front Panel Operation
6 - Using Slew Rates to Generate Waveforms
As shown in the previous examples there are a number of ways that you can generate custom waveforms.
Programmable slew rates provide additional flexibility when customizing waveforms. The following
figure illustrates how programmable slew rates are applied in the transient operating modes.
In example , an immediate slew rate of 50 volts/second is used whenever a new output voltage is
programmed. In example ô, a triggered slew rate of 50 volts/second steps the voltage level to its new
value. 50 volts/second becomes the new immediate slew rate in step mode. In example í, a triggered
slew rate of 50 volts/second is used at the start of the pulse. The immediate slew rate of infinity applies at
the trailing edge of the pulse. In example ÷, the slew rates are set by the values in the voltage slew list.
New VOLT level
1 SLEW:MODE FIXED
SLEW rate
VOLT:T level
2 SLEW:MODE STEP
SLEW:T rate
SLEW rate
SLEW rate
VOLT:T level
3 SLEW:MODE PULSE
SLEW:T rate
SLEW:T
rate
width
SLEW [2]
SLEW rate
VOLT level
4 SLEW:MODE LIST
SLEW [0]
SLEW [3]
SLEW [1]
TRIGGER
LIST
APPLIED
COMPLETE
Figure 4-8. Programming Slew Rates
50
Front Panel Operation - 4
Example
j
Display
This example uses the immediate slew rate. First, access the Voltage menu
and press ô until you access the mode command. On the Entry keypad, press
° to obtain FIXED. Press Enter.
Access the voltage menu and press ô until you access the slew command. On
the Entry keypad, press 5 0 Enter to program a slew rate of 50 volts/second.
VOLT:M
SLEW
FIXED
50
Whenever a new immediate voltage value is entered, the output will slew to
the new level at 50 volts/second.
ô
Step mode uses the triggered slew rate. First, access the Voltage menu,
program the immediate and triggered voltage levels, and set the slew mode to
STEP.
VOLT 120
VOLT:T
150
SLEW:M STEP
Access the Voltage menu and press ô to access the immediate slew
command. On the Entry keypad, enter a value that equals infinity.
SLEW: 9.9+E37
Access the Voltage menu and press ô until you access the triggered slew
command. On the Entry keypad, enter a value such as 5 0 Enter, which sets
the triggered slew rate to 50 volts/second.
SLEW:T
Then press Trigger Control and Enter, followed by Shift Trigger.
INIT:IMMED
50
After the trigger has been sent, in step mode, the triggered value becomes the
new immediate value.
í
Pulse mode uses the triggered slew rate at the leading edge of the pulse, and
the immediate slew rate at the trailing edge of the pulse. First, access the
Voltage menu, program the immediate and triggered voltage levels, and set
the slew mode to PULSE.
Access the Pulse menu and program the pulse count, duty cycle, and pulse
period.
Access the Voltage menu and press ô to access the immediate slew
command. On the Entry keypad, enter a value that equals infinity.
÷
VOLT 120
VOLT:T
150
SLEW:M PULSE
COUNT 2
DCYCLE 33
PER
.0166
SLEW: 9.9+E37
Access the Voltage menu and press ô until you access the triggered slew
command. On the Entry keypad, enter a value such as 5 0 Enter, which sets
the triggered slew rate to 50 volts/second.
SLEW:T
Then press Trigger Control and Enter, followed by Shift Trigger.
INIT:IMMED
50
When the voltage slew mode is set to LIST, the slew rates are set by the
values in the voltage slew list. Refer to the List Transient example for more
information on how to program lists. You must program the voltage values
and dwell times as explained in that example. You must also program a slew
rate for each point in the list (even if it is 9.9+E37).
NOTE:
When specifying a dwell time, you must take the slew time into consideration. If the
dwell time at any given list point is less than the slew time at the same point, the voltage
will never reach its programmed level before the next list point becomes active.
51
4 - Front Panel Operation
7 - Measuring Peak Inrush Current
Peak inrush current is a non-repetitive measurement in the sense that peak inrush current occurs only
when the unit under test is first turned on. In order to repeat the measurement, you must turn the unit off
and wait for any input filter capacitors to discharge completely.
This example shows you how you can measure the peak inrush current using the front panel meter. The
voltage is set to 120 V rms and the output is triggered at an output phase of 75°, which optimizes the
conditions under which inrush current is applied to the unit under test.
Action
Display
1.
Set the immediate voltage to 0. Press Voltage, then press 0 and Enter.
2.
Set the triggered voltage to 120 V rms. In the Voltage menu, press ô to
access the triggered voltage command. Then press 1 2 0 Enter.
VOLT:T 120
3.
Set the voltage mode to step. In the Voltage menu, press ô to access the
mode command. Press ° to scroll to STEP and press Enter.
VOLT:M STEP
4.
Make sure the unit is operating in the low voltage range. (The low voltage
range has twice the output current rating of the high voltage range.) In the
Voltage menu, press ô to access the range command. If necessary, press ° to
set the range to 150 and press Enter.
5.
Make sure the triggered voltage slew rate is set to the fastest possible speed.
In the Voltage menu, access the triggered slew command. If necessary, reset
the slew rate to a faster speed.
6.
Make sure the peak current and rms current limits are set to high values. In the
Current menu, access the rms current limit and then the peak current limit
commands. If necessary, reset the rms current and the peak current limits to
higher values.
(Agilent 6811B units have an rms current limit of 3.25 A. Agilent 6813B units
have an rms current limit of 13 A and a peak current limit of 80 A)
CURR:LEV 6.5
CURR:PEAK 40
7.
Synchronize the trigger source with a reference phase angle. In the Trigger
Control menu, press ô to access the sync source command. Press ° to obtain
PHASE and press Enter.
SYNC:SOUR PHASE
8.
Set the reference phase angle to 75°. In the Trigger Control menu, press ô to
access the sync phase command. Then press 7 5 Enter.
SYNC:PHAS 75
9.
Initiate (or enable) the unit for one immediate trigger from the front panel.
Press Trigger Control and Enter.
INIT:IMMED
10.
Set the meter function to measure nonrepetitive peak inrush current. In the
Meter menu, press ô to access the peak inrush current display.
0 A PK NR
11.
Enable the output by pressing Output On/Off.
0V
60 HZ
12.
Send the trigger to step the output from 0 V to 120 V. Press Shift Trigger.
The inrush current is displayed on the Meter.
48 A
PK NR
VOLT
RANGE
SLEW:T
0
150
9.9000+E37
On three-phase ac sources you can only return the peak inrush current from the selected phase because
the front panel can only display one phase at a time. Refer to the ac source Programming Guide on how
to return simultaneous measurements from all three phases.
52
Front Panel Operation - 4
8 - Setting the GPIB Address and RS-232 Parameters
Your ac source is shipped with the GPIB address set to 5 This address can only be changed from the front
panel using the Address menu located under the Address key. This menu is also used to select the RS232 interface and specify RS-232 parameters such baud rate and parity.
Action
Display
To set the GPIB address, proceed as follows:
1.
On the System keypad, press Address.
ADDRESS 5
2.
Enter the new address. For example, Press 7, Enter.
ADDRESS 7
To configure the RS-232 interface, proceed as follows:
1.
On the System keypad, press Address.
2.
Scroll through the Address menu by pressing ô . The interface command
lets you select the RS-232 interface. The baudrate command lets you
select the baudrate. The parity command lets you select the parity.
3.
The ¯ and ° keys let you select the command parameters.
ADDRESS 5
INTF RS232
BAUDRATE 600
PARITY EVEN
9 - Saving and Recalling Operating States
You can save up to 16 states (from location 0 to location 15) in non-volatile memory and recall them
from the front panel. All programmable settings are saved. List data, however, cannot be saved in state
storage. Only one list is saved in non-volatile memory.
Action
Display
To save an operating state in location 1, proceed as follows:
1.
Set the instrument to the operating state that you want to save.
2.
Save this state to location 1. Press Shift Save 1 Enter.
*SAV 1
To recall a saved state in location 1, proceed as follows:
1.
Recall the state saved in location 1 by pressing Recall 1 Enter
*RCL 1
To select the power-on state of the ac source, proceed as follows:
1.
On the Function keypad, press Shift Output, and scroll through the Output
menu until you get to the PON state command.
2.
Use the ¯ and ° keys to select either RST or RCL0. RST sets the power-on
state of the unit as defined by the *RST command. RCL0 sets the power-on
state of the unit to the state saved in *RCL location 0.
PON:STATE RST
To clear the non-volatile memory of the ac source, proceed as follows:
1.
On the Function keypad, press Shift Output and scroll to the *RST
command. Then press Enter. This returns the unit to the factory-default
settings.
2.
Save these settings to location 1. Press Shift Save 1 Enter.
3.
Repeat step #2 for memory locations 2 through 16..
*RST
*SAV 1
*SAV 2
*SAV 3
*SAV 4
.
.
...*SAV 16
53
4 - Front Panel Operation
10 - Switching Between Single- and Three-phase Operation (Agilent 6834B only)
When shipped from the factory, the Agilent 6834B ac source is configured for three-phase operation.
You can configure the Agilent 6834B for single-phase operation. This increases the available output
power for phase 1 from 1.5 kVA to 4.5 kVA.
NOTE:
When you configure the Agilent 6834B for single-phase operation, the phase 2 and phase
3 output terminals are internally connected to the phase 1 output terminal. This
distributes the increased available output power across the three output terminals.
Additionally, switching the Agilent 6834B between single-phase and three-phase operation causes the
following actions:
♦
♦
♦
♦
it disables all outputs
it reconfigures the current readback and programming calibration constants
it returns all lists and *RCL states to their factory default states
it reboots the unit, after which the newly selected number of phases becomes available
NOTE:
This may require you to reprogram the lists and recall states each time the outputs are
switched.
Action
Display
1.
On the System keypad, press Address.
2.
Press ô to scroll through the address menu until you get to the NOUTPUTS
command.
NOUTPUTS
3
3
Use the ¯ and ° keys to select the number of output phases; either 1 (single-phase)
or 3 (three-phase).
NOUTPUTS
NOUTPUTS
3
1
54
ADDRESS
5
A
Specifications
Specifications
Performance specifications are warranted over the ambient temperature range of 0 to 40 oC. Unless
otherwise noted, specifications are per phase for a sinewave with a resistive load at an output frequency
range of 45 Hz to 5 kHz (45 Hz-1 kHz, Agilent 6843A) after a 30-minute warmup.
Table A-1. Performance Specifications1
Parameter
Phases:
Maximum Output Ratings
2
rms Voltage :
Power:
rms Current:
Repetitive peak Current:
Crest Factor (current):
Output Frequency Range:
Constant Voltage Ripple and Noise
Load Regulation:
Line Regulation:
Maximum Total Harmonic Distortion:
Agilent 6814B
1
3 kVA
20 A low range
10 A high range
80 A low range
40 A high range
4
Programming Accuracy (@ 25oC ±5oC)
rms Voltage:
Frequency:
Phase: (Agilent 6834B in 3-phase
mode)
Measurement Accuracy (@25oC ±5oC)
rms Voltage
rms Current
Frequency:
Power (VA):
Power (Watts):
Power Factor:
N/A
Agilent 6834B
3
1
150 V low range;
300 V high range
1.5 kVA/phase
4.5 kVA
10 A low range
30 A low range
5 A high range
15 A high range
40 A low range
120 A low range
20 A high range
60 A high range
4
4
45 Hz−5 kHz
−60 dB (20 kHz−10 MHz)
0.5%
0.1%
1% (45 Hz−1 kHz);
1% + 1%/kHz (>1 kHz−5 kHz)
0.15% + 0.3 V (45−100 Hz)
0.5% + 0.3 V (>100−500 Hz)
1% + 0.3 V (>500−5 kHz)
0.01% + 10 µHz
N/A
0.1º (45-100 Hz)
1º (>100−1 kHz)
1º + 1%/kHz
(>1k−5 kHz)
0.05%+ 250 mV (45 Hz − 1 kHz)
0.05% + 0.1%/kHz + 250 mV (>1 kHz − 5 kHz)
0.1% + 50 mA
0.1% + 25 mA
0.1% + 50 mA
0.01% + 0.01Hz 0.01% + 0.01Hz
0.01% + 0.01Hz
0.15% + 5 VA
0.15% + 3 VA
0.15% + 5 VA
0.15% + 5 W
0.15% + 3 W
0.15% + 5 W
0.01
0.01
0.01
Agilent 6843A
1
4.8 kVA
32 A low range
16 A high range
96 A low range
48 A high range
3
45 Hz−1 kHz
N/A
0.05% + 250 mV
0.1% + 50 mA
0.01% + 0.01Hz
0.15% + 9 VA
0.15% + 9 W
0.01
1
Specifications subject to change without notice.
From line to neutral on Agilent 6834B
2
55
A - Specifications
Supplemental Characteristics
Table A-2 lists the supplemental characteristics, which are not warranted but are descriptions of typical
performance determined either by design or type testing.
Table A-2. Supplemental Characteristics
Parameter
AC Input Voltage Range:
AC Input Frequency:
Output Isolation Voltage:
Maximum Input Current (rms):
Maximum Input Power:
Average Programming Accuracy:
Average Programming Resolution
rms Voltage:
Overvoltage Programming (OVP):
rms Current:
Output Frequency:
Phase (Agilent 6834B in 3-phase mode):
Average Measurement Resolution
rms Voltage:
rmsCurrent:
List Dwell Time
Triggering Accuracy with Respect to Phase
Synchronization:
Trigger In Response Time:
Minimum Resolution for Dropout:
Output Response Time:
(output change from 10 to 90% or 90 to 10% of its
total excursion with full resistive load)
Remote Inhibit Response Time:
Remote Sense Capability:
Waveform Table Resolution (voltage):
Harmonic Measurement Time (amplitude):
RS-232 Interface Capabilities
Baud Rates:
Data Format:
Language:
Trig In/Trig Out Characteristics
Trig Out (HC TTL output):
Trig In (10k pullup):
56
Agilent 6814B
18 A low range
10 A high range
5.8 kVA/4.1 kW
0.2% + 80 mA
80 mV
2V
5 mA
80 mV
2V
2.5 mA (3-phase)
7.5 mA (1-phase)
10 µHz
0.001° (45Hz−1kHz)
10 µHz
N/A
10 mV
3 mA
0−4.30133 x 10 5s
100 µs
200 µs
Agilent 6834B
Agilent 6843A
180−235 Vac (3-phase) or
360−440 Vac (3-phase)
47−63 Hz
300 Vrms
24 A low range
24 A low range
15 A high range
15 A high range
8.9 kVA/5.9 kW
8.9 kVA/5.9 kW
0.2%+40mA (3-phase)
0.2% + 80 mA
0.2%+80mA (1-phase)
10 mV
6 mA (3-phase)
2 mA (1-phase)
0−1.07533 x 10 6s
250 µs
80 mV
2V
7.5 mA
10 µHz
N/A
10 mV
6 mA
0−4.30133 x 10 5s
100 µs
400 µs
500 µs
50 µs
200 µs
<1 ms
Up to 10 Vrms can be dropped across each load lead.
1024 points
1 harmonic ≤100 ms;
all 50 harmonics ≤2 s
300, 600, 1200, 2400, 4800, 9600
7 bits even or odd parity; 8 bits without parity
SCPI (Standard Commands for Programmable Instruments),
Elgar 9012 PIP
Vol = 0.8 max. @ 1.25 mA
Voh = 3.3 V max. @ 1.25 mA
Vil = 0.8 V max.
Vih = 2 V max.
Specifications A
Table A-2. Supplemental Characteristics (continued)
Parameter
INH/FLT Characteristics
Maximum Ratings:
INH Terminals:
FLT Terminals:
Saveable Data (nonvolatile)
Instrument States:
User-defined waveforms:
List Data:
GPIB Interface Capabilities
Language:
Interface:
Programming Time:
Recommended Calibration Interval:
Regulatory Compliance
Listed to:
Certified to:
Conforms to:
RFI Suppression
Complies with:
Dimensions
Height (add 12.7 mm or 0.5 in. for feet)
Width:
Depth:
Net Weight:
Shipping Weight:
Agilent 6814B
Agilent 6834B
Agilent 6843A
16.5 Vdc between INH terminals; FLT terminals; and from INH
terminals to chassis ground
Iol = 1.25 mA max.
Vol = 0.5 Vmax.
Vil = 0.8 V max.
Vih = 2 V min.
tw = 100 µs min.
td = 4 ms typical
16 (0 to 15)
12 (with 1024 data points in each)
1 to 100 points (for each list function)
SCPI, Elgar 9012 PIP
AH1, C0, DC1, DT1, E2, LE1, PP0, RL1, SH1, SR1, TE6
10 ms
1 year
UL 3111-1
CSA 22.2 No. 1010-1
IEC 1010
CISPR-11, Group 1, Class A
262.6 mm (10.3 in.)
430.8 mm (16.96 in.)
602 mm (23.7 in.)
79.5 kg (175 lb)
87.7 kg (193 lb)
119.1 kg (626 lb)
127.3 kg (280 lb)
87.7 kg (193 lb)
127.3 kg (280 lb)
57
B
Verification and Calibration
Introduction
This appendix includes verification and calibration procedures for the Agilent 6814B/6834B/6843A AC
Power Solutions. Instructions are given for performing the procedures either from the front panel or from
a controller over the GPIB.
The verification procedures do not check all the operating parameters, but verify that the ac source is
performing properly. Performance Tests, which check all the specifications of the ac source, are given in
the applicable ac source Service Manual.
Because the output of the ac source must be enabled during verification or calibration, proceed with
caution, since voltages and currents will be active at the output terminals.
Important
Perform the verification procedures before calibrating your ac source. If the ac source
passes the verification procedures, the unit is operating within its calibration limits and
does not need to be recalibrated.
WARNING
LETHAL VOLTAGES. Ac sources can supply 424 V peak at their output. DEATH
on contact may result if the output terminals or circuits connected to the output are
touched when power is applied. These procedures must be performed by a qualified
electronics technician or engineer trained on this equipment.
Equipment Required
The equipment listed in the following table, or the equivalent to this equipment, is required for
verification and calibration.
Equipment
Digital Voltmeter
Current Monitor 1
Ratio Transformer2
Load Resistors
Impedance Resistor
GPIB Controller
Table B-1. Equipment Required
Characteristics
Resolution: 10 nV @ 1 V
Readout: 8.5 digits
Accuracy: >20 ppm
0.01 Ω, ±200 ppm, (Agilent 6814B/6834B)
0.001 Ω, ±200 ppm, (Agilent 6843A)
30:1 ratio, 50 ppm, 45 Hz to 1 kHz
2 − 15 Ω, > 1.5 kW (Agilent 6814B/6834B)
1 − 5 Ω, > 4.8 kW non-inductive (Agilent 6843A)
1 Ω, 100 Watts min. (Agilent 6843A only)
Full GPIB capabilities
Recommended Model
Agilent 3458A
Guildline 7320/0.01
Norma Gerts Instruments
HP Series 200/300 or equivalent
1
The 4- terminal current shunt is used to eliminate output current measurement error caused by voltage drops in the
load leads and connections. Connect the voltmeter directly to these current-monitoring terminals.
2
A ratio transformer is required only when verifying output voltage readback to MIL-STD-45662A 4:1 test
equipment ratio requirements.
59
B - Verification and Calibration
Test Setup
Figure B-1 shows the setup for the tests. Be certain to use load leads of sufficient wire gauge to carry the
full output current (see Chapter 2).
B. CURRENT SETUP
A. VOLTAGE SETUP
RMS
VOLTMETER
RMS
VOLTMETER
shunt
R LOAD
1
30
S1
O1
shunt
S2
R LOAD
O2
COM
O3
O1
O2
R IMPEDANCE
O3
COM
L1
shunt
R LOAD
L2
L3
S3
Switch is for
convenience,
not required.
CAUTION: Connect only one phase at a time
AC INPUT 3 phase
180-254 VAC line to line
or
360-440 VAC line to line
Figure B-1. Verification & Calibration Test Setup
Performing the Verification Tests
The following procedures assume you understand how to operate the ac source from the front panel as
explained in Chapter 4.
When performing the verification tests from a GPIB controller, you may have to consider the relatively
slow settling times and slew rates of the ac source as compared to computer and system voltmeters. Insert
suitable WAIT statements into the test program to give the ac source time to respond to test commands.
Perform the following tests for operation verification in the order indicated.
1.
Turn-On Checkout
2.
Voltage Programming and Measurement Accuracy
3.
Current Measurement Accuracy
Turn-On Checkout Procedure
Perform the Turn-On Checkout as directed in Chapter 3.
NOTE:
60
The ac source must pass turn-on selftest before you can proceed with the verification
tests.
Verification and Calibration - B
Voltage Programming and Measurement Accuracy
This test verifies the voltage programming, GPIB measurement, and front panel meter functions. Values
read back over the GPIB should be the same as those displayed on the front panel.
Figure B-1 shows the setup. Measure the ac output voltage directly at the output terminals. If you are
verifying a three-phase source, sart by verifying output phase 1.
Action
Normal Result
1.
Make sure the ac source is turned off. Connect the DVM and ratio
transformer as shown in the test setup in Figure B-1.
2.
Turn on the ac source with no load. In the Output menu, execute the
*RST command to reset the unit to its factory default state.
3.
Program the output voltage to 150 volts and set the output current
limit to its maximum value.
4.
Enable the output by pressing Output On/Off.
1
5.
Record voltage readings at the DVM and on the front panel display.
6.
Program the output voltage to 300 volts.
1
*RST
CV annunciator on.
Output voltage near 0.
Output current near 0.
Output voltage near 150 V.
Readings within low voltage
limits specified in table B-2.
Output voltage near 300 V.
7.
Record voltage readings at the DVM and on the front panel display.
Readings within high voltage
limits specified in table B-2.
8.
If you are verifying a 3-phase source, repeat steps 1 through 7 for
phases 2 and 3. Press Phase Select to select the next phase.
Readings within specified High
range limits (300 V/1 kHz).
1
Multiply the DVM reading by the transformer ratio if a ratio transformer is used.
RMS Current Readback Accuracy
This test verifies the current readback. Use the appropriate current shunt with the accuracy specified in
table B-1. Use wire of sufficient size to carry the maximum rated current of the ac source (see table 2-1).
If you are verifying a 3-phase source, start by verifying phase 1.
Action
Normal Result
1.
Turn off the ac source. Connect the load resistor, current shunt, and
the DVM across the current shunt as shown in Figure B-1. Use the
following load resistor values:
Agilent 6814B = 7.5Ω; Agilent 6834B = 15Ω; Agilent 6843A = 5Ω
2.
Turn on the ac source. In the Output menu, execute the *RST
command to reset the unit to its factory default state.
3.
Program the output voltage to 100 volts and set the current limit as
follows:
Agilent 6814B = 10 A; Agilent 6834B = 5A; Agilent 6843A = 15A
Then enable the output by pressing Output On/Off.
CC annunciator on. Output current
near 10 A for Agilent 6814B
near 5 A for Agilent 6834B
near 15A for Agilent 6843A
4.
Record the DVM voltage reading and calculate the rms current.
Divide the DVM reading by the current monitor resistor value.
Record the front panel reading.
Difference between the measured
output current and front panel
readings are within specified limits.
5.
If you are verifying a 3-phase source, repeat steps 1 through 4 for
phases 2 and 3. Press Phase Select to select the next phase.
*RST
61
B - Verification and Calibration
Table B-2. Agilent 6814B/6834B/6843A Verification Test Record
Model ________________
Test Description
Report No.____________ Date_____________
Minimum
Specification
Recorded Results
Maximum
Specification
Voltage Programming and Measurement Accuracy
Low voltage (150 Vrms)
Front Panel Measurement
149.5 V
Vout −300 mV
_______V
_______mV
150.5 V
Vout +300 mV
High voltage (300 Vrms)
Front Panel Measurement
299.30 V
Vout −400 mV
_______V
_______mV
300.7 V
Vout +400 mV
Agilent 6814B Current Measurement Accuracy
Front Panel Measurement (10A)
Iout −60 mA
_______mA
Iout +60 mA
Agilent 6834B Current Measurement Accuracy
Front Panel Measurement (5A)
Iout −30 mA
_______mA
Iout +30 mA
Agilent 6843A Current Measurement Accuracy
Front Panel Measurement (15A)
Iout −65 mA
_______mA
Iout +65 mA
Performing the Calibration Procedure
Table B-1 lists the equipment required for calibration. Figure B-1 shows the test setup.
NOTE:
You do not have to do a complete calibration each time. You may calibrate only the
voltage or current and proceed to "Saving the Calibration Constants." However, before
you calibrate OVP, you must first calibrate the output voltage.
The following parameters may be calibrated:
♦
ac output voltage
♦
realtime voltage (Agilent 6843A only)
♦
overvoltage protection (OVP)
♦
output voltage readback
♦
ac output current
♦
output current measurement (Agilent 6843A only)
♦
output impedance (Agilent 6843A only)
Before calibrating the output impedance on Agilent 6843A units, you must first calibrate the output
voltage and the output current.
NOTE:
62
The Agilent 6834A ac source must be calibrated in 3-phase output mode or an error will
occur. To put the Agilent 6834B unit in 3-phase output mode, press Address, scroll to
NOUTPUT 3 command, and press Enter.
Verification and Calibration - B
Front Panel Calibration Menu
The Entry keypad is used for calibration functions.
Shift
Cal
Press this key to access the calibration menu.
Display
Command Function
CAL ON <value>
Turns calibration mode on when the correct password
value is entered.
Turns calibration mode off
Advance to next step in sequence (P1, P2, P3, or P4).
Input a calibration measurement.
Begin ac voltage calibration sequence
Begin voltage protection calibration
Begin ac current calibration sequence
Begin current measurement calibration sequence
Begin output impedance calibration sequence
Begin realtime voltage calibration
Saves the calibration constants in non-volatile memory.
Set new calibration password.
CAL OFF
CAL:LEV <char>
CAL:DATA <value>
CAL:VOLT:AC
CAL:VOLT:PROT
CAL:CURR:AC
CAL:CURR:MEAS
CAL:IMP
CAL:VOLT:RTIM1
CAL:SAVE
CAL:PASS <value>
Notes:
1
Agilent 6843A only
value = a numeric value
char = a character string parameter
Use p
and q
to scroll through the command list.
Use Ë
and Ì
to scroll through the parameter list.
Front Panel Calibration
WARNING
LETHAL VOLTAGES. Ac sources can supply 425 V peak at their output. DEATH
on contact may result if the output terminals or circuits connected to the output are
touched when power is applied. These procedures must be performed by a qualified
electronics technician or engineer trained on this equipment.
The following procedures assume you understand how to operate front panel keys (see Chapter 4).
Enable Calibration Mode
1.
Action
Reset the unit by selecting Shift, Output, and pressing Enter.
If you are calibration a 3-phase source, make sure that the default phase 1
(φ1) annunciator is lit. Press Phase Select to select a different phase.
2.
Press Shift Calibration, scroll to CAL ON, and press Enter.
3.
Enter the calibration password from Entry keypad and press Enter. If the
password is correct the Cal annunciator will come on.
If CAL DENIED appears, then an internal switch has been set to prevent the
calibration from being changed. (see the Service Manual.)
If the password is incorrect, an error occurs. If the active password is lost,
the calibration function can be recovered by setting an internal switch that
defeats password protection. (see the Service Manual.)
Display
*RST
CAL ON 0.0
CAL DENIED
OUT OF RANGE
63
B - Verification and Calibration
Calibrating and Entering Voltage Calibration Values
Action
Display
4.
Connect the DVM (ac volts mode) directly to the ac source via the ratio
transformer shown in Figure B-1. Do not connect the load resistor or
current shunt.
5.
Press Shift Calibration, scroll to CAL VOLT AC, and press Enter.
6.
Press Shift Calibration, scroll to CAL LEV P1, and press Enter to select
the first calibration point.
CAL:LEV P1
7.
Press Shift Calibration, scroll to CAL DATA, and use the Entry keypad
to enter the voltage value displayed on the DVM. (Multiply the DVM
readings by the transformer ratio if a ratio transformer is used.)
CAL:DATA 0.00
8.
Press Shift Calibration, scroll to CAL LEV P1, use ° to scroll to the P2
parameter, and press Enter. This selects the second calibration point.
CAL:LEV P2
9.
Press Shift Calibration, scroll to CAL DATA, and use the Entry keypad
to enter the voltage value displayed on the DVM. (Multiply the DVM
readings by the transformer ratio if a ratio transformer is used.)
CAL:DATA 0.00
10.
Press Shift Calibration, scroll to CAL LEV P1, use ° to scroll to the P3
parameter, and press Enter.
CAL:LEV P3
11.
Press Shift Calibration, scroll to CAL DATA, and use the Entry keypad
to enter the voltage value displayed on the DVM. (Multiply the DVM
readings by the transformer ratio if a ratio transformer is used.)
CAL:DATA 0.00
12.
Press Shift Calibration, scroll to CAL LEV P1, use ° to scroll to the P4
parameter, and press Enter.
CAL:LEV P4
13.
Press Shift Calibration, scroll to CAL DATA, and use the Entry keypad
to enter the voltage value displayed on the DVM. (Multiply the DVM
readings by the transformer ratio if a ratio transformer is used.)
CAL:DATA 0.00
CAL:VOLT:AC
The ac source is now holding the new voltage calibration constants in RAM
Calibrating and entering realtime voltage calibration values (Agilent 6843A
only)
14.
Press Shift Calibration, scroll to CAL VOLT RTIM, and press Enter.
15.
Press Shift Calibration, scroll to CAL LEV P1, and press Enter.
16.
Press Shift Calibration, scroll to CAL DATA, and use the Entry keypad
to enter the voltage value displayed on the DVM. (Multiply the DVM
readings by the transformer ratio if a ratio transformer is used.)
CAL:VOLT:RTIM
CAL:LEV P1
CAL:DATA 0.00
Calibrating the OVP trip point
17.
Press Shift Calibration, scroll to CAL VOLT PROT, and press Enter.
18.
Wait for the ac source to compute the OVP calibration constant. The
display returns to Meter mode when the OVP calculation is complete.
The ac source is now holding the new OVP calibration constants in RAM
19.
64
If you are calibrating a 3-phase source, press Phase Select to select the
next phase and repeat steps 4 through 13 and 17 and 18 for phases 2 and 3.
The phase annunciators on the front panel indicate which phase is active.
CAL:VOLT:PROT
Verification and Calibration - B
Calibrating and Entering Current Calibration Values
Action
20.
Display
Connect the appropriate current shunt and load resistor as shown in figure B1. Connect the DVM (ac rms mode) across the current shunt.
If you are calibrating a 3-phase source, make sure that the default phase 1
(φ1) annunciator is lit. Press Phase Select to select a different phase.
21.
Press Shift Calibration, scroll to CAL CURR AC, and press Enter.
22.
Press Shift Calibration, scroll to CAL LEV P1, and press Enter.
23.
Press Shift Calibration and scroll to CAL DATA. Wait for the DVM
reading to stabilize. Read the DVM and calculate the first current value
(DVM ac rms voltage divided by the shunt resistance). Use the Entry keypad
to enter the rms current value.
24.
Press Shift Calibration, scroll to CAL LEV P1, use ° to scroll to the P2
parameter, and press Enter.
25.
Press Shift Calibration and scroll to CAL DATA. Wait for the DVM
reading to stabilize. Read the DVM and calculate the second current value
(DVM ac rms voltage divided by the shunt resistance). Use the Entry keypad
to enter the rms current value.
26.
If you are calibrating a 3-phase source, press Phase Select to select the
next phase and repeat steps 20 through 25 for phases 2 and 3.
The phase annunciators on the front panel indicate which phase is active.
CAL:CURR:AC
CAL:LEV P1
CAL:DATA 0.00
CAL:LEV P2
CAL:DATA 0.00
Calibrating and entering rms current measurement values (Agilent 6843A only)
27.
Press Shift Calibration, scroll to CAL CURR MEAS, and press Enter.
28.
Press Shift Calibration, scroll to CAL LEV P1, and press Enter.
29.
Press Shift Calibration and scroll to CAL DATA. Wait for the DVM
reading to stabilize. Read the DVM and calculate the first current value
(DVM ac rms voltage divided by the shunt resistance). Use the Entry keypad
to enter the rms current value.
CAL:DATA 0.00
30.
Press Shift Calibration, scroll to CAL LEV P1 command, use ° to scroll
to the P2 parameter, and press Enter.
CAL:LEV P2
31.
Press Shift Calibration and scroll to the CAL DATA. Wait for the DVM
reading to stabilize. Read the DVM and calculate the second current value
(DVM ac rms voltage divided by the shunt resistance). Use the Entry keypad
to enter the rms current value.
CAL:DATA 0.00
CAL:CURR:MEAS
CAL:LEV P1
The ac source is now holding the new current calibration constants in RAM
65
B - Verification and Calibration
Calibrating the Output Impedance (Agilent 6843A only)
NOTE:
The output voltage and output current must be calibrated before the output impedance
can be calibrated.
Action
Display
32.
Connect only the output impedance resistor across the output of the ac source.
Do not connect any other equipment.
33.
Press Shift Calibration, scroll to the CAL IMP command, and press Enter.
34.
Wait for the ac source to compute the output impedance calibration constant.
The display returns to Meter mode when the calculation is complete.
CAL:IMP
The ac source is now holding the new impedance calibration constants in RAM
Saving the Calibration Constants
CAUTION:
Storing calibration constants overwrites the existing ones in non-volatile memory. If you
are not sure you want to permanently store the new constants, omit this step. The ac
source calibration will then remain unchanged.
Action
Display
35.
Press Shift Calibration, scroll to CAL SAVE, and press Enter.
CAL:SAVE
36.
Press Shift Calibration, select CAL OFF, and press Enter to exit Calibration
mode. *RST and *RCL will also set the calibration state to OFF.
CAL OFF
Changing the Calibration Password
The factory default password is 0. You can change the password when the ac source is in calibration
mode (which requires you to enter the existing password). Proceed as follows:
Action
Display
1.
Begin by pressing Shift Calibration and scrolling to the CAL ON command.
2.
Enter the existing password from Entry keypad and press Enter
3.
Press Shift Calibration and scroll to the CAL PASS command.
4.
Enter the new password from the keypad. You can use any number with up to
six digits and an optional decimal point. If you want the calibration function to
operate without requiring any password, change the password to 0 (zero).
NOTE:
66
CAL ON 0.0
CAL:PASS 0
If you want the calibration function to operate without requiring any password, change
the password to 0 (zero).
Verification and Calibration - B
Calibration Error Messages
Errors that can occur during calibration are shown in the following table.
Table B-3. GPIB Calibration Error Messages
Error
Meaning
401
402
403
404
405
406
CAL switch prevents calibration (This is a hardware disable, see the ac source Service Manual.)
CAL password is incorrect
CAL not enabled
Computed readback cal constants are incorrect
Computed programming cal constants are incorrect
Incorrect sequence of calibration commands
Calibration Over the GPIB
You can calibrate the ac source by using SCPI commands within your controller programming
statements. Be sure you are familiar with calibration from the front panel before you calibrate from a
controller. Each front panel calibration command has a corresponding SCPI command.
The SCPI calibration commands are explained in Chapter 3 of the ac source Programming Guide.
Calibration error messages that can occur during GPIB calibration are shown in table B-3.
Agilent Calibration Program Listing
Figure B-2 lists the calibration program. This program can be run on any controller operating under
Agilent BASIC. The assumed power supply address is 705 and calibration password is 0. If required,
change these parameters in the appropriate statements.
67
B - Verification and Calibration
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
200
210
220
230
240
250
260
270
280
290
300
310
320
330
340
350
360
370
380
390
400
410
420
430
440
450
460
470
480
490
500
510
520
530
540
550
560
570
580
590
600
610
620
630
640
650
660
670
680
690
!
! AC Source calibration program
Rev B.00.00
!
ASSIGN @Ac TO 705
!
PRINT TABXY(3,3),"This program will calibrate the 6814B/34B/43A AC Power Solutions."
PRINT TABXY(3,5),"Equipment requirements are: Agilent 3458A or equivalent DVM"
PRINT TABXY(35,6),"0.01 ohm <200ppm Current Shunt for 6814B/6834B"
PRINT TABXY(35,7),"0.001 ohm <200ppm Current Shunt for 6843A"
PRINT TABXY(35,8),"0 - 5 ohm > 4.8 kW power resistor for 6843A"
PRINT TABXY(35,9),"2 - 15 ohm > 1.5 kW power resistor for 6814B/6834B"
PRINT TABXY(35,10),"1 - 1 ohm > 100 watt impedance resistor for 6843A"
PRINT TABXY(35,11),"30:1 <50ppm Ratio Transformer"
PRINT TABXY(3,13),"Ratio Transformer is required when calibrating to MIL-STD-45662A. If the ratio"
PRINT TABXY(3,14),"transformer is not used, the measurement uncertainty must be recalculated."
PRINT TABXY(3,16),"IF YOU ARE CALIBRATING A 6843B, SELECT THE PHASE TO CALIBRATE USING THE FRONT"
PRINT TABXY(3,17),"PANEL KEYPAD.
*** NOTE: THIS PROGRAM WILL ONLY CALIBRATE 1 PHASE. ***"
PRINT TABXY(3,18),"YOU MUST RUN THIS PROGRAM 3 TIMES TO CALIBRATE ALL PHASES OF A 6843B."
DISP "Press CONT to continue"
PAUSE
CLEAR SCREEN
PRINT TABXY(10,5),"1. Turn the AC Source off"
PRINT TABXY(10,7),"2. Disconnect all loads"
PRINT TABXY(10,9),"3. Connect the 3458A to the rear terminal block"
PRINT TABXY(10,11),"4. Set the 3458A to AC VOLTS"
PRINT TABXY(10,13),"5. Turn on the AC Source"
!
DISP "Press CONT to begin AC PROGRAMMING and MEASUREMENT calibration"
PAUSE
CLEAR SCREEN
PRINT TABXY(18,5),"CALIBRATING AC POGRAMMING and MEASUREMENT"
PRINT TABXY(20,7),"There are 4 points to be calibrated"
OUTPUT @Ac;"CAL:STATE:ON"
OUTPUT @Ac;"CAL:VOLT:AC"
OUTPUT @Ac;"CAL:LEV P1"
WAIT 10
INPUT "Enter AC rms ( transformer ratio * DVM reading)",Ac_p1
PRINT TABXY(25,9),"Point 1 entered"
OUTPUT @Ac;"CAL:DATA";Ac_p1
OUTPUT @Ac;"CAL:LEV P2"
WAIT 10
INPUT "Enter AC rms ( transformer ratio * DVM reading)",Ac_p2
PRINT TABXY(25,11),"Point 2 entered"
OUTPUT @Ac;"CAL:DATA";Ac_p2
OUTPUT @Ac;"CAL:LEV P3"
WAIT 10
INPUT "Enter AC rms ( transformer ratio * DVM reading)",Ac_p3
PRINT TABXY(25,13),"Point 3 entered"
OUTPUT @Ac;"CAL:DATA";Ac_p3
OUTPUT @Ac;"CAL:LEV P4"
WAIT 10
INPUT "Enter AC rms ( transformer ratio * DVM reading)",Ac_p4
PRINT TABXY(25,15),"Point 4 entered"
OUTPUT @Ac;"CAL:DATA";Ac_p4
WAIT 3
CLEAR SCREEN
!
! Only include lines 580 - 690 if calibrating Agilent 6843
!
PRINT TABXY(18,5),"CALIBRATING REALTIME VOLTAGE (Agilent 6834A ONLY)"
PRINT TABXY(20,7),"There is 1 point to be calibrated"
OUTPUT @Ac;"CAL:VOLT:RTIM"
OUTPUT @Ac;"CAL:LEV P1"
WAIT 10
INPUT "Enter realtime rms ( transformer ratio * DVM reading)",Rt_p1
PRINT TABXY(25,9),"Point 1 entered"
OUTPUT @Ac;"CAL:DATA";Rt_p1
WAIT 3
CLEAR SCREEN
Figure B-2. Calibration Program Listing (Sheet 1 of 2)
68
Verification and Calibration - B
700
710
720
730
740
750
760
770
780
790
800
810
820
830
840
850
860
870
880
890
900
910
920
930
940
950
960
970
980
990
1000
1010
1020
1030
1040
1050
1060
1070
1080
1090
1100
1110
1120
1130
1140
1150
1160
1170
1180
1190
1200
1210
1220
1230
1240
1250
1260
1270
1280
1290
1300
1310
1320
1330
1340
1350
1360
1370
1380
1390
PRINT TABXY(15,10),"CALIBRATING OVERVOLTAGE PROTECTION"
OUTPUT @Ac;"CAL:VOLT:PROT"
PRINT TABXY(30,15),"WAIT"
WAIT 30
OUTPUT @Ac;"CAL:SAVE"
OUTPUT @Ac;"CAL:STATE OFF"
CLEAR SCREEN
PRINT TABXY(15,5),"1. Turn off the AC Source"
PRINT TABXY(15,7),"2. Connect the current shunt and load resistor, see fig.B-1"
PRINT TABXY(15,9),"3. Connect the 3458A across the current shunt"
PRINT TABXY(15,11),"4. Set the 3458A to AC rms VOLTS"
PRINT TABXY(15,13),"5. Turn on the AC Source"
!
DISP "Press CONT to begin Current Program and Measurement calibration"
PAUSE
CLEAR SCREEN
PRINT TABXY(22,5),"CALIBRATING CURRENT POGRAMMING"
PRINT TABXY(20,7),"There are 2 points to be calibrated"
OUTPUT @Ac;"CAL:STATE ON"
OUTPUT @Ac;"CAL:CURR:AC"
OUTPUT @Ac;"CAL:LEV P1"
WAIT 10
INPUT "Enter AC rms current ( DVM reading divided by shunt resistance )",Ai_p1
PRINT TABXY(25,9),"Point 1 entered"
OUTPUT @Ac;"CAL:DATA";Ai_p1
OUTPUT @Ac;"CAL:LEV P2"
WAIT 10
INPUT "Enter AC rms current ( DVM reading divided by shunt resistance )",Ai_p2
PRINT TABXY(25,11),"Point 2 entered"
OUTPUT @Ac;"CAL:DATA";Ai_p2
WAIT 3
CLEAR SCREEN
!
! Only include lines 1030 - 1340 if calibrating Agilent 6843
!
PRINT TABXY(22,5),"CALIBRATING CURRENT MEASUREMENT (Agilent 6843A ONLY)"
PRINT TABXY(20,7),"There are 2 points to be calibrated"
OUTPUT @Ac;"CAL:CURR:MEAS"
OUTPUT @Ac;"CAL:LEV P1"
WAIT 10
INPUT "Enter AC rms current ( DVM reading divided by shunt resistance )",Am_p1
PRINT TABXY(25,9),"Point 1 entered"
OUTPUT @Ac;"CAL:DATA";Am_p1
OUTPUT @Ac;"CAL:LEV P2"
WAIT 10
INPUT "Enter AC rms current ( DVM reading divided by shunt resistance )",Am_p2
PRINT TABXY(25,11),"Point 2 entered"
OUTPUT @Ac;"CAL:DATA";Am_p2
WAIT 3
CLEAR SCREEN
OUTPUT @Ac;"CAL:SAVE"
OUTPUT @Ac;"CAL:STATE OFF"
PRINT TABXY(15,5),"1. Turn off the AC Source"
PRINT TABXY(15,7),"2. Disconnect all equipment from the AC Source"
PRINT TABXY(15,9),"3. Connect the 1 ohm impedance resistor, see fig.B-1"
PRINT TABXY(15,11),"4. Turn on the AC Source"
!
DISP "Press CONT to begin Output Impedance calibration"
PAUSE
PRINT TABXY(15,10),"CALIBRATING OUTPUT IMPEDANCE (Agilent 6843A ONLY)"
OUTPUT @Ac;"CAL:STATE ON"
OUTPUT @Ac;"CAL:IMP"
PRINT TABXY(30,15),"WAIT"
WAIT 30
!
OUTPUT @Ac;"CAL:SAVE"
OUTPUT @Ac;"CAL:STATE OFF"
CLEAR SCREEN
PRINT TABXY(25,10),"CALIBRATION COMPLETE"
END
Figure B-2. Calibration Program Listing (Sheet 2 of 2)
69
C
Error Messages
Error Number List
This appendix gives the error numbers and descriptions that are returned by the ac source. Error numbers
are returned in two ways:
♦
Error numbers are displayed on the front panel
♦
Error numbers and messages are read back with the SYSTem:ERRor? query. SYSTem:ERRor?
returns the error number into a variable and returns two parameters: an NR1 and a string.
The following table lists the errors that are associated with SCPI syntax errors and interface problems. It
also lists the device dependent errors. Information inside the brackets is not part of the standard error
message, but is included for clarification. When errors occur, the Standard Event Status register records
them in bit 2, 3, 4, or 5:
Table C-1. Error Numbers
Error Number
–100
–101
–102
–103
–104
–105
–108
–109
–112
–113
–121
–123
–124
–128
–131
–138
–141
–144
–148
–150
–151
–158
–160
–161
–168
–170
Error String [Description/Explanation/Examples]
Command Errors –100 through –199 (sets Standard Event Status Register bit #5)
Command error [generic]
Invalid character
Syntax error [unrecognized command or data type]
Invalid separator
Data type error [e.g., "numeric or string expected, got block data"]
GET not allowed
Parameter not allowed [too many parameters]
Missing parameter [too few parameters]
Program mnemonic too long [maximum 12 characters]
Undefined header [operation not allowed for this device]
Invalid character in number [includes "9" in octal data, etc.]
Numeric overflow [exponent too large; exponent magnitude >32 k]
Too many digits [number too long; more than 255 digits received]
Numeric data not allowed
Invalid suffix [unrecognized units, or units not appropriate]
Suffix not allowed
Invalid character data [bad character, or unrecognized]
Character data too long
Character data not allowed
String data error
Invalid string data [e.g., END received before close quote]
String data not allowed
Block data error
Invalid block data [e.g., END received before length satisfied]
Block data not allowed
Expression error
71
C - Error Messages
–171
–178
Invalid expression
Expression data not allowed
–200
–221
–222
–223
–224
–225
–270
–272
–273
–276
–277
Execution Errors –200 through –299 (sets Standard Event Status Register bit #4)
Execution error [generic]
Settings conflict [check current device state]
Data out of range [e.g., too large for this device]
Too much data [out of memory; block, string, or expression too long]
Illegal parameter value [device-specific]
Out of memory
Macro error
Macro execution error
Illegal macro label
Macro recursion error
Macro redefinition not allowed
–310
–350
System Errors –300 through –399 (sets Standard Event Status Register bit #3)
System error [generic]
Too many errors [errors beyond 9 lost due to queue overflow]
–400
–410
–420
–430
–440
Query Errors –400 through –499 (sets Standard Event Status Register bit #2)
Query error [generic]
Query INTERRUPTED [query followed by DAB or GET before response complete]
Query UNTERMINATED [addressed to talk, incomplete programming message received]
Query DEADLOCKED [too many queries in command string]
Query UNTERMINATED [after indefinite response]
0
1
2
3
4
5
6
7
10
11 - 31
40
72
Selftest Errors 0 through 99 (sets Standard Event Status Register bit #3)
No error
Non-volatile RAM RD0 section checksum failed
Non-volatile RAM CONFIG section checksum failed
Non-volatile RAM CAL section checksum failed
Non-volatile RAM WAVEFORM section checksum failed
Non-volatile RAM STATE section checksum failed
Non-volatile RAM LIST section checksum failed
Non-volatile RAM RST section checksum failed
RAM selftest
DAC selftest error, expected <n>, read <reading>
Errors 11, 12, 13, 14, 15 apply to DAC12 1A and 1B
Errors 16, 17, 18 apply to DAC12 2A
Errors 19, 20, 21 apply to DAC12 2B
Errors 22, 23 apply to DAC12 4A
Errors 24, 25 apply to DAC12 4B
Errors 26, 27, 28 apply to DAC12 3A and 3B
Errors 29, 30, 31 apply to DAC12 5A and 5B
Voltage selftest error, output 1
Error Messages - C
41
42
43
44
45
70
80
200
201
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
401
402
403
404
405
406
600
601
602
603
604
605
606
607
608
609
610
Voltage selftest error, output 2
Voltage selftest error, output 3
Current selftest error, output 1
Current selftest error, output 2
Current selftest error, output 3
Fan voltage failure
Digital I/O selftest error
Device-Dependent Errors 100 through 32767 (sets Standard Event Status Register bit #3)
Outgrd not responding
Front panel not responding
Ingrd receiver framing error
Ingrd uart overrun status
Ingrd received bad token
Ingrd receiver buffer overrun
Ingrd input buffer overrun
Outgrd output buffer overrun
RS-232 receiver framing error
RS-232 receiver parity error
RS-232 receiver overrun error
Ingrd inbuf count sync error
Front panel uart overrun
Front panel uart framing
Front panel uart parity
Front panel buffer overrun
Front panel timeout
CAL switch prevents calibration
CAL password is incorrect
CAL not enabled
Computed readback cal constants are incorrect
Computed programming cal constants are incorrect
Incorrect sequence of calibration commands
Systems in mode:list have different list lengths
Requested voltage and waveform exceeds peak voltage capability
Requested voltage and waveform exceeds transformer volt-second rating
Command only applies to RS-232 interface
Trigger received before requested number of pre-trigger readings
Requested RMS current too high for voltage range
Waveform data not defined
VOLT, VOLT:SLEW, and FUNC:SHAP modes incompatible
Measurement overrange
Output buffer overrun
Command cannot be given with present SYST:CONF setting
73
Index
—A—
accessories, 10
airflow, 16
annunciators
φ1, 32
Addr, 32
Cal, 32
CC, 32
CV, 32
Dis, 32
Err, 32
OCP, 32
Prot, 32
Rmt, 32
Shift, 32
SRQ, 32
Tran, 32
Unr, 32
AWG ratings, 19
error numbers, 71
—F—
—C—
cables, 10
calibration, 62
enable, 63
equipment, 59
error messages, 67
menu, 63
output impedance, 66
password, 66
program listing, 67
rms current, 65
saving, 66
setup, 60
voltage offset, 64
capabilities, 11
cleaning, 15
features, 11
Fixed, 44
FLT connections, 21
frequency control, 12
front panel, 31
annuncuiators, 32
controls and indicators, 12, 31
keys, 32
function keys, 34
, 34, 35
Index, 34
immediate action, 34
Output On/Off, 34
Phase Select, 34
Trigger, 34
fuses, 17
—G—
general information, 9
ground, earth, 10
guide, programming, 9
guide, user’s, 9
—H—
hazardous voltages, 59
history, 6
HP-IB, 53
address, 53
connections, 22
—I—
—D—
damage, 15
digital connections, 21
digital connector, 15
dimensions, 16
INH connections, 21
input
connections, 17
power, 10
inspection, 15
—E—
entry keys, 40
, 40
0 ... 9, 40
Clear Entry, 40
E, 40
Enter, 40
error messages, 29
­
—L—
lethal voltages, 59
line fuse
replacing, 29
List, 44, 46
load voltage drops, 19
location, 16
75
Index
—M—
manuals, 9, 15
Meter AC+DC, 32
meter display keys
Harmonic, 35
Input, 35
Meter, 35
—S—
—N—
non-volatile memory
clearing, 53
storing, 33
—O—
operating features, 11
options, 10
output
characteristic, 12
connections, 19
connector, 15
rating, 12
setting output protection, 43
setting the amplitude, 41, 54
setting the frequency, 43
Output AC+DC, 32
output checkout, 26
output control keys
Current, 36
Freq, 36
Voltage, 36
OVLD, 29
—P—
Peak Inrush current
measuring, 52
Phase synchronization, 47
power cord, 15
installation, 17
power receptacle, 10
preliminary checkout, 25
print date, 6
program listing
calibration, 67
protection/status keys
Protect, 38
Status, 38
Pulse, 45
—R—
rack mount kit, 10
rack mounting, 16
recalling operating states, 53
remote programming, 12
remote sensing, 20
OVP considerations, 21
repacking, 15
76
RS-232, 53
connections
interface commands, 23
data format, 23
handshake, 24
pinouts, 23
safety class, 10
safety summary, 3
safety warning, 10
saving operating states, 53
self-test, 25
selftest errors, 29
sense connections, 20
service guide, 10
shift annunciator, 26
shift key, 26
Slew rates
programming, 50
specifications, 55
Step, 44
supplemental characteristics, 56
SYSTem
LOCal, 23
REMote, 23
RWLock, 23
system errors, 71
system keys, 33
Address, 33
Error, 33
Interface, 33
Local, 33
RCL, 33
Save, 33
Shift, 33
—T—
transient voltage
fixed, 44
list, 44, 46
pulse, 45
step, 44
transient voltage mode, 44
trigger connections, 21
Trigger delays, 47
trigger IN, 21
trigger OUT, 21
trigger/list keys
List, 39
Trigger Control, 39
turn-on checkout, 25, 60
—V—
verification, 26
ac measurement accuracy, 61
ac voltage programming, 61
equipment, 59
Index
rms current accuracy, 61
setup, 60
test record, 62
verification tests, 25
voltage control, 12
—W—
warranty, 2
Waveform
generation, 50
wire
current ratings, 19
wiring considerations, 19
77
Agilent Sales and Support Offices
For more information about Agilent Technologies test and measurement products, applications,
services, and for a current sales office listing, visit our web site:
http://www.agilent.com/find/tmdir
You can also contact one of the following centers and ask for a test and measurement sales
representative.
United States:
Agilent Technologies
Test and Measurement Call Center
P.O. Box 4026
Englewood, CO 80155-4026
(tel) 1 800 452 4844
Latin America:
Agilent Technologies
Latin American Region Headquarters
5200 Blue Lagoon Drive, Suite #950
Miami, Florida 33126
U.S.A.
(tel) (305) 267 4245
(fax) (305) 267 4286
Canada:
Agilent Technologies Canada Inc.
5150 Spectrum Way
Mississauga, Ontario
L4W 5G1
(tel) 1 877 894 4414
Australia/New Zealand:
Agilent Technologies Australia Pty Ltd
347 Burwood Highway
Forest Hill, Victoria 3131
(tel) 1-800 629 485 (Australia)
(fax) (61 3) 9272 0749
(tel) 0 800 738 378 (New Zealand)
(fax) (64 4) 802 6881
Europe:
Agilent Technologies
Test & Measurement European Marketing Organisation
P.O. Box 999
1180 AZ Amstelveen
The Netherlands
(tel) (31 20) 547 9999
Asia Pacific:
Agilent Technologies
24/F, Cityplaza One, 1111 King’s Road,
Taikoo Shing, Hong Kong
tel: (852)-3197-7777
fax: (852)-2506-9284
Japan:
Agilent Technologies Japan Ltd.
Measurement Assistance Center
9-1, Takakura-Cho, Hachioji-Shi,
Tokyo 192-8510, Japan
(tel) (81) 426 56 7832
(fax) (81) 426 56 7840
Technical data is subject to change.
78
Manual Updates
The following updates have been made to this manual since the print revision indicated on the
title page.
4/15/00
All references to HP have been changed to Agilent.
All references to HP-IB have been changed to GPIB.
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