Keithley 705 User manual

InstructionManual
Model 705 Scanner
Contains OperatingandServicing Information
705-001-01 Rev. F/ 4-00

WARRANTY
Keithley Instruments, Inc. warrants this product to be free frqm defects in material and workmanship for a period of I year
from date of shipment.
Keithley Instruments, Inc. warrants the following items for 90 days from the date of shipment: probes, cables, rechargeable
batteries, diskettes, and documentation.
During the warranty period, we will, at our option, either repair or replace any product that proves to be defective.
To exercise this warranty, write or call your local Keithley representative, or contact Keithley headquarters in Cleveland, Ohio.
You will be given prompt assistance and return instructions. Send the product, transportation prepaid, to the indicated service
facility. Repairs will be made and the product returned, transportation prepaid. Repaired or replaced products are warranted for
the balance of the original warranty period, or at least 90 days.
LIMITATION OF WARRANTY
This warranty does not apply to defects resulting from product modification without Keithley’s express written consent, or
misuse of any product or part. This warranty also does not apply to fuses, software, non-rechargeable batteries, damage from
battery leakage, or problems arising from normal wear or failure to follow instructions.
THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIE S, EXPRESSED OR IMPLIED, INCLUDING ANY
IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. THE REMEDIES PRO-
VIDED HEREIN ARE BUYER’S SOLE AND EXCLUSIVE REMEDIES.
NEITHER KEITHLEY LNSTRUMENTS, INC. NOR ANY OF ITS EMPLOYEES SHALL BE LIABLE FOR ANY DIRECT,
INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF ITS
INSTRUMENTS AND SOFTWARE EVEN IF KEITHLEY INSTRUMENTS, INC.. HAS BEEN ADVISED IN ADVANCE
OF THE POSSIBILITY OF SUCH DAMAGES. SUCH EXCLUDED DAMAGES SHALL INCLUDE, BUT ARE NOT LIM-
ITED TO: COSTS OF REMOVAL AND INSTALLATION, LOSSES SUSTAINED AS THE RESULT OF INJURY TO ANY
PERSO.N, OR DAMAGE TO PROPERTY.
Keithley Instruments, Inc. l 28775 Aurora Road l Cleveland, OH 44139 l m-248-0400 l Fax: [phone] l http://www.keithley.com
BELGIUM:
CHINA
FRANCE:
GERMANY:
GREAT BRITAIN:
[NIXA:
ITALY:
NETHEHLANDS:
SWITZERLAND:
TAIWAN:
Keittdey lnshuments B.V. Bargensesteenweg 709 l B-1600 Sint-Pieters-Leeuw l OZ363 00 JO l Fax [phone]
Keitbley Instruments China Yuan Chen Xin Building. Room 705 * 12Yumin Road. Dew& Madian *Beijing loo029 *8610-62022886 *Fax: [phone]
Keithley Instruments Sari B.P. 60 l 3. all&e des Ganys *91122 Palaisuu CSdex l 01 64 53 20 20 * Fax: 01 60 1I 77 26
Keithley Instruments GmbH Landsberg.% Stnsse 65. D-821 IO ‘&rowing l 089/g-193 07-40 * Fax: 089/8J 93 07-34
Keitbley Instruments Ltd The Minster l 58 Portman Road * Reading. Berkshire RG30 IEA *0118-9 57 56 66. Fax: 01 IS-9 59 6-l 69
Keithley Instruments GmbH Rat 2B. WILGCRISSA l 14, Rest House Crescent l Bangalore 560 001 l 91sSC-509-1320~21 l Fax: [phone]
Keitbley Instruments s.r.1. Viale S. Gimignano, 38 l 2OlJ6 Milano l CY2/4830 30 08 . Fax: [phone]
Keithley Instruments B.V. Postbus 559 l 4200 AN Gorinchrm l 0183-635333 s Far;: 0183-630821
Keithley instruments SA Kriesbachstrasse~. 8M)o Diibendorf. 01-821 94 J4 l Fax: [phone]
Keithley Instruments Taiwan I Fl. 8.5 POAi Street * Hsinchu. Taiwan, R.O.C. * 886-3573-9077 * Fax [phone]

Model705 Scanner
InstructionManual
01982, Keithley Instruments, Inc.
All rights reserved.
Cleveland, Ohio, U.S.A.
Sixth Printing, April 2000
Document Number: 705-901-01 Rev. F

SPECIFICATIONS
CAPACITY: Two plug-in cards per mainframe.
EXPANSION CAPACITY: Daisy chain allows up to 4 SLAVE units with 1
MASTER unit.
SWITCHING RATE: 100 channels/second IlOms), programmable to 1
channel/l6 minutes 1999.999s).
RELAY DRIVE: 350mA minimum.
INTERNAL CLOCK: Displays hours/minutes/seconds or date/month; less
than 1 minute/month error (typical).
BATTERY BACKUP: Rechargeable 3.6V nickel-cadmium. 1 month reten-
tion of data (typical) with unit turned off.
IEEE-488 BUS IMPLEMENTATION
Multiline Commands: DCL, LLO, SDC, GET, GTL, UNT, UNL, SPE, SPD.
Uniline Commands: IFC, REN, EOI, SRQ, ATN.
Interface Functions: SHl, AHl, T6, TEO, L4, LEO, SRI, RLI, PPO, DCl,
DTI, CO, El.
Programmable Parameters: Display Mode, Output Format, EOI, SRQ,
First, Last, Open, Close, Display Channel, Alternate Output, Pole Mode,
Date Format, Save/Restore, Reset, l/O Port, Time, Date, Settling Time,
Interval Time, Alarm Time, Program Mode, Trigger Mode, Terminator, Self
Test.
Digital I/O Port: A separate I/O port consisting of eight input and eight out-
put lines as well as common (IEEE-488) and +SVDC. Outputs will drive
one TTL load. Inputs represent one TTL load. Mating connector supplied.
FRONT PANEL PROGRAMS
0 - Digital I/O
I* - Date Format
2’ -Settle Time
3” - IEEE Address
4* -Save Setup
5* - Restore Setup
6* - Poles
7 -Alarm Time
8 - Self Test
%I* - Stand Alone
91’ - Master
92’ - Slave
99 -Reset
*Battery backed up.
Read or change state on digital I/O port.
Changes date display between MM.DD and
DD.MM.
Time to output CHANNEL READY pulse after
closing relay.
Set bus address; cannot be programmed from bus.
Stores present relay setup in numbered (I - 5)
buffer.
Recalls relay setup in buffer 1 - 5.
1, 2 or 4-pole configuration for switching.
Set time for Alarm output pulse; repeats daily.
Check RAM, ROM, LEDs.
Single 705 configuration.
Daisy chain configuration.
Daisy chain configuration.
Reset battery backup parameters to factory values.
STORAGE ENVIRONMENT: -25O to 65°C.
CONNECTORS: Four BNC; External Trigger, Alarm Out/Serial-In, Channel
Ready, Serial Out (TTL compatible).
POWER: 105-125V or 210-250V (internal switch selected), 5OHzto4OOHz.25
V*A maximum. 90-IIOV and 180.220V version available.
DIMENSIONS, WEIGHT: 127mm high x 216mm wide x 359mm deep (5”
x 8%” x 14%“). Net weight 3kg (6% lbs.).
ACCESSORIES AVAILABLE:
Model 1019A: 5%” Universal Fixed Rack Mounting Kit
Model 1019s: 5%” Universal Slide Rack Mounting Kit
Model 4801: BNC-to-BNC Cable
Model 7008-3: IEEE-488 Cable, 0.9m I3 ft.)
Model 7008-6: IEEE-488 Cable, 1.8m (6 ft.)
Model 7010: IEEE-488 Adapter for Model 85 Computer
Model 7024-3: Triaxial Cable, 0.9m (3 ft.)
Model 7024-10:Triaxial Cable, 3.0m (IO ft.)
Model 7055: Quick Disconnect Card
Model 7056: General Purpose Scanner Card
Model 7057: Thermocouple Scanner Card
Model 7058: Low Current Scanner Card
Model 7059: Low Voltage Scanner Card
Specificationssubjectto changewithout notice.
GENERAL
DISPLAY: Six 0.5” LED digits with decimal point, function and IEEE status
annunciators.
OPERATING ENVIRONMENT: O” to 50°C, 0% to 80% relative humidity
up to 35oc.
SPECIFICATION ADDENDUM
1. Batten/ back-up time is for unit at 23OC. Operation or storage at higher
temperatures could reduce this time below 1 month. Even under extremes
a fully charged system should last a week.
2. Note that some plug-in card specifications may limit mainframe perfor-
mance when installed (e.g. Humidity).
3. Relay drive capability at 400Hz is limited to 200mA typical and a max-
imum ambient temperature of 35OC.

1
2
Tableof Contents
General Information
Introduction. ........................................................................................................................................................ l-l
Features................................................................................................................................................................ 1-l
Warranty Information .......................................................................................................................................... 1-l
Manual Addenda ................................................................................................................................................. l-1
Safety Symbols and Tenns.. ................................................................................................................................ l-1
Unpacking and Inspection ................................................................................................................................... l-l
Specifications.. .................................................................................................................................................... l-1
Accessories.. ................................................................................................................................................. 1-I
.....
. .
Repacking for Shipment ...................................................................................................................................... l-2
Operation
Introduction ......................................................................................................................................................... 2-1
Preparation for Use ............................................................................................................................................. 2-1
Correct Line Voltage. .................................................................................................................................. 2-1
Plug-In Card (Scanner) Installation ............................................................................................................ 2- 1
Power-up ....... ...................................................................................................................................................... 2-l
Environmental Conditions .................................................................................................................................. 2-3
Operating Instructions ......................................................................................................................................... 2-3
Front Panel Controls ................................................................................................................................... 2-3
Rear Panel Description ................................................................................................................................ 2-5
Basic Front Panel Operation ....................................................................... 2-7
................................................
Front Panel Programs.. ........................................................................................................................ 2-13
..............
Program 0 Digital I/O .................................................................................................................... 2-13
.......... ,
Program 1 Date Format ............................................................................................................................. 2-13
Program 2 Settle Time .............................................................................................................................. 2- 1-l
Program 3 Primary Address.. .................................................................................................................... 2-14
Program 4 Save Present Relay Set Up.. .................................................................................................... 2- 15
Program 5 Recall Stored Relay Set Up.. ................................................................................................... 2- 15
Program 6 Pole Modes.. ............................................................................................................................ 2-16
Program 7 Set Alarm Time ....................................................................................................................... 2-17
Program 8 Self Test ................................................................................................................................... 2-18
Program 90 Stand Alone.. ......................................................................................................................... 2-18
Program 9 1 Master.. .................................................................................................................................. 2- 18
Program 92 Slave ...................................................................................................................................... 2-19
Program 99 Reset.. .................................................................................................................................... 2- 19

3
5 Maintenance
IEEEBusOperation
Introduction ......................................................................................................................................................... 3-I
Soltwarc Considcrstions .............................................................................................................................. 3- !
HP-85 BASIC Statements ........................................................................................................................... .3-I
Interface Function Codes ............................................................................................................................. 3-2
Model 705 Interface Commands.. ............................................................................................................... i-.3
IEEE-388 Bus Lines ............................................................................................................................................ .3-?
Bus Management Lines.. ............................................................................................................................. 3-3
Handshake Lines ......................................................................................................................................... 3-J
Data Lines.. .................................................................................................................................................. .3-J
System Set up Procedure.. ................................................................................................................................... 3-4
Bus Commands .................................................................................................................................................... j-5
Uniline Commands.. .................................................................................................................................... .3-5
Universal Commands .................................................................................................................................. 3-6
Addressed Commands.. ........................................................................................................... 3-7
-
....................
Device-Dependent Commands ................................... ......................................................................................... 3-8
-
Display Mode .............................................................................................................................................. 1-8
-
Program (Scan) hlode.. .............................................................................................................................. 3- 12
Prefix ......................................................................................................................................................... 3-12
.
EOI ............................................................................................................................................................ 3-12
-
Bus Response hlodc (SRQ I
....................................................................................................................... .?-13
Trigger Modes .......................................................................................................................................... 3-35
.
Programmable Terminator IY). ................................................................................................................. 3-15
Inputs ......................................................................................................................................................... i-15
-
Status Byte Format ............................................................................................................................................ 3-23
Status Word (UO). ............................................................................................................................................. 3-23
.
Front Panel Programs ........................................................................................................................................ 3.24
_
Front Panel Error Messages ............................................................................................................................... 3-24
.
IDDC Error ................................................................................................................................ ................ 1-25
.
No Remote Error.. ..................................................................................................................................... 3-25
.
Scanning Program ............................................................................................................................................. 3-25
-
Theory of Operation
Introduction ......................................................................................................................................................... 4- I
Power Supply.. ..................................................................................................................................................... 4 I
Microcomputer .................................................................................................................................................... 4- I
Display Circuit.. ................................................................................................................................................... 4-3
IEEE-488 Interface Circuitry .............................................................................................................................. 4-3
Introduction 5-l
-
...................... ...................................................................................................................................
Fuse Replacement 4-I
.................................................................................................................................................
Lint Voltage Selection ........................................................................................................................................ S-l
Disassembly ............................................................................................................ :............................................ 5-1
Troubleshooting.. ................................................................................................................................................. 5-3
Digital Self Test.. ............................................................. .................................................................................... 5-3
_
Battery Charge ..................................................................................................................................................... 5-3

ReplaceableParts
Introduction.. ....................................................................................................................................................... h-l
Parts List ............................................................................................................................................................. 6-I
Ordering In~orniation .......................................................................................................................................... h- I
Factory Service.. .................................................................................................................................................. 6- I
Schematic Diagrams and Component Location Drawings ................................................................................. 6- I
III

2
Figure 2- 1
Figure 2-2
Figure 2-3
3 IEEEBusOperation
Bus Structure.... . ........ 3-3
. ...............................................................................................................................
Handshake Sequence... ....................................................................................................~.................. . . ...I. 3-4
Contact Assignment . ..........................................................................
....................................................... 3-5
_
Model 705 IEEE Bus Connector ................................................................................................................. 3-5
Digital I/O Port Pin Assignments.. ............................................................................................................ 1-19
-
LJand G Modes Sequence .. .......
............................................................................................................... 3-23
Status B) te Format ...................
................................................................................................................. 7-23
-
U4 Status Word (Reset conditions shown) .. . ......................................................................................... 1-24
-
IEEE Display Error Messages ............
....................................................................................................... 3-25
Figure 3- 1
Figure 3-2
Figure 3-3
Figure 3-4
Figure 3-5
Figure 3-6
Figure 3-7
Figure 3-8
Figure 3-9
4 Theory of Operation
Figure 4-l Model 705 Block Diagram .......................................................................................................................... 4-2
Figure 4-2 Memory Map ............................................................................................................................................... 4-l
5
Figure 5- 1
6 ReplaceableParts
Figure 6- 1 Interconnect Board, Component Location Drawing, Dwg. No. 705- 160.. ................................................. 6-7
Figure 6-2 Display Board, Component Location Drawin,.u Dwg. No. 705-I 10........................................................... 6-9
Figure 6-3 I/O Board, Component Location Drawing, Dwg. No. 705-173 ................................................................ 6-11
Figure 6-4 Mother Board. Component Location Drawing, Dwg. No. 705-100 ......................................................... 6-13
Figure 6-5 Mother Board, Schetnatic Diagram, Dwg. No, 7OS- 106.. ......................................................................... 6- 17
Figure 6-6 Display Board, Schematic Diagram, Dwg. No. 705-I 16.......................................................................... 6-23
Figure 6-7 I/O Board, Schematic Diagram, Dwg. No. 705-176 ................................................................................. 6-25
Figure 6-8 Interconnect Board, Schematic Diagram, Dwg. No. 705- 166 .................................................................. 6-27
Listof Illustrations
Operation
Scanner Card Installation 1-7
............................................................................................................................ i -
Model 705 Front and Rear Panels.. ............................................................................................................. 2-6
Daisy Chaining Three Model 705’s.. .......................................................................................................... 2-9
Maintenance
Model 705 Exploded View ,,.................,.,......,............................................................................................ 5-2

2
Table 2-l Line Voltage Setting ................................................................................................................................... 2- I
Table 2-2 Power Up Default Conditions (Front Panel Operation). ............................................................................. 2-3
Table 2-3 Summary of Front Panel Programs ........................................................................................................... 2- I.3
Table 2-4 Switchins Card Pole Modes ...................................................................................................................... 2- 16
Table 2-S Program 99 Reset Conditions ................................................................................................................... 2-20
3 IEEEBusOperation
Table I- 1
Table i-2
Table 3-3
Table i-4
Table 3-5
Table 3-6
Table 3-7
Table 3-8
Table 3-9
Table 3-10
5 Maintenance
Table 5-l Fuse Replacement. 3AG size.. .................................................................................................................... 5- I
Table 5-2 Fuse Replacement. 5mm size.. .................................................................................................................... 5-I
Table 5-3 Line Voltage Selection.. .............................................................................................................................. 5-I
6 ReplaceableParts
Table 6- 1 Index of ~Modcl 705 Schematics and Component Layouts.. ....................................................................... 6- 1
Table 6-2 Display Board 705-I IO. Parts List.. ............................................................................................................ 6-2
Table 6-3 Mother Board 705- 103. Parts List.. ............................................................................................................. 6-3
Table 6-4 Digital I/O Board 705 173. Parts List.. ....................................................................................................... 6-5
Table 6-5 k/lode1 705 Mechanical Parts List ............................................................................................................... 6-6
Listof Tables
Operation
HP-85 IEEE-488 BASIC Statements.. ........................................................................................................ 3-2
Model 705 Interface Function Codes.. ........................................................................................................ 3-3
IEEE Command Groups.. ............................................................................................................................ 3-3
IEEE Bus Connector Contact Designations.. .............................................................................................. 3-5
Power-Up Default Values 1-6
............................................................................................................................
SDC Set Conditions ............. ....................................................................................................................... 1-7
-
Device-Dependent Comtnands ................................................................................................................... 3-9
_
Hierarchy of Command Execution Z-10
............................................................................................................
SRQ Commands and Conditions .......... .................................................................................................... 3-13
-
Digital I/O Port Contact Pin Assignments. ............................................................................................... 3-20
vii

SECTION 1
GENERAL INFORMATION
1.1 INTRODUCTION
The Model 705 is a low cost IEEE compatible scanner. The
basic mainframe can accomodate two plug-in scanner cards.
Each card can have different pole configurations. In the l-pole
configuration the card has 20 channels, The 4-pole configura-
tion allows 10 channels with two cards (for four-wire ohms).
Using the “daisy chain” method the Model 705, along with
four additional Model 705’s, can provide up to 100 2-pole
channels. The time and the date are kept internally with a bat-
tery backed up clock allowing time dependent procedures to
be performed,
The controls on the front panel allow opening a selected chan-
nel, closing the channel, scanning between a selectable first
and last channel, selectable scan rate and mode. There are 13
internal programs that are accessible from the front panel. The
programs can select primary address, dwell time, store a relay
set up, recall the stored relay set up, control the digital l/O
port, switch from International to American date format, con-
trol interval stop/start and select I-, 2- or 4 pole measurement
modes.
The Model 705 Scanner adheres to standard IEEE-488 inter-
face bus protocol. This enables the Model 705 to be incor-
porated into any measurement system that uses programmed
control through the IEEE-488 bus.
1.2 FEATURES
The Model 705 Scanner includes the following features:
*IEEE-488 bus operation.
*Selectable scan rate from IOms to 999.999sec.
*Selectable scan modes that allow the operator to scan the
first channel to the last channel once, continuously or
manually.
*Thirteen internal programs that are available through the front
panel.
*Model 705 mainframe can accomodate two scanner plug-in
cards.
aSeveral different scanner relay cards are available as options.
They include: a general purpose relay card; a thermocouple
relay card; a low voltage relay card; and a low current relay
card.
*Time and date are kept with a battery backed up clock.
*Digital I/O port with eight lines as inputs and eight lines as
outputs.
1.3 WARRANTY INFORMATION
Warranty information is provided on the inside front cover of
this manual. If there is a need to exercise the warranty, contact
the Keithley representative in your area to determine the proper
action to be taken. Keithley maintains complete repair and
calibration facilities in the United States, West Germany, Great
Britain, France, the Netherlands, Switzerland and Austria. In-
formation concerning the application, operation or service of
your instrument may be directed to the applications engineer at
any of the above locations. Check the inside front cover of this
manual for addresses.
l’.4 MANUAL ADDENDA
Improvements or changes to this manual will be explained on
an addendum included with this manual,
1.5 SAFETY SYMBOLS AND TERMS
Safety symbols used in this manual are as follows:
The symbol A on the instrument denotes that the user
should refer to the operating instructions.
The symbol /v on the instrument denotes that IOOOV or
more may be present on the terminal(s).
The WARNING used in this manual explains dangers that
could result in personal injury or death.
The CAUTION used in this manual explains hazards that
could damage the instrument.
1.6 UNPACKING AND INSPECTION
The Model 705 is inspected both mechanically and electrically
before shipment. Upon receiving the Model 705 unpack all
items from the shipping container and check for any obvious
damage that may have occurred during transit. Report any
damage to the shipping agent. Retain and use the original
packaging materials if reshipment is necessary. The following
items are shipped with all Model 705 orders:
*Model 705 Scanner
*Model 705 Instruction Manual
*Optional accessories per request.
1.7 SPECIFICATIONS
For Model 705 detailed specifications, refer to the specifica-
tions that precede this section.
1.8 ACCESSORIES
Model 1019A Rack Mounting Kit-The Model 1019A rack’
mounting kit can accomodate one or two Model 705’s. The’
dimensions are 133mm x 483mm (5% x 19in).
Model 1019s Slide Rack Mounting Kit-Enables one or
two half rack size instruments to be rack mounted with the
added feature of sliding the instrument(s) for easy access.
The dimensions are 133mm x 483mm (5% x Igin.).
l-l