Keithley 617 User manual

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MODEL 617
PROGRAMMABLE ELECTROMETER
QUICK REFERENCE GUIDE
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INTRODUCTION
This reference and programming guide contains condensed specifica-
tions, descriptions of the various features and information for using the
Model 617.
Included with descriptions of each feature are brief operating instruc-
tions and some examples of typical uses.
Included with the programming information are several example pro-
grams utilizing some commonh, used controllers to get the Model 617
“up and running” on the IEEE-488 bus.
0 1984, Keithlay Instruments, Inc.
Cleveland, Ohio, U.S.A.
Document Number 617903-N Rev. A
1
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CONTENTS
CONDENSED SPECIFICATIONS ........................... 3
MODEL617FEATURES ................................... 7
IEEE-488 PROGRAMMING ............................... 35
PROGRAMS. ........................................... 41
DATA STORE OPERATION .............................. 42
USING HP-85
IBM PC orXT Personal Computer. ......................... 43
[Using Keiffiley Model 8573 Interface)
APPLE II {Using Apple Interface). .......................... 45
HP-s5...............-.--------~-.-*..-~---..........- . 46
HP-9825A _........~..........._.._.........__...~.__~ _ 47
HP.9816..........-.......-....-.~......~...--.....-.~. 48
DECLSIll ............................................ 49
PETlCBM 2001 ......................................... 51
2
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CONDENSED SPECIFICATIONS
I VOLTS I
INPUT IMPEDANCE: >2OOTG in parallelwith 2OpF (~2pF guarded).
AMPS
Range Resolution
2PJ4 O.lfA
20 PA 1 fA
200 pA 10 fA
2nA 1oofA
20 nA 1 PA
2oanA 10 pA
2fi loopA
2:: 110 nAnA
2mA
20mA
Accurecy
1 year, 18-28X
f(%rdg + counts)
1.6 % + 66
1.6 % + 7
1.6 % + 1
0.25% + 5
0.25% + 1
0.25% + 1
0.15% + 4
0.15%0.15% ++ 11
0.15% + 4
0.15% t 1
INPUT VOLTAGE BURDEN: <lmV except 3mV on 2OmA mnge.
3
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OHMS
Accuracy Test
1 year, 18-W??. Current
Range Resolution f (%rdg t counts) fl.576
2kn 0.1 n 0.2 % t 4 1fJW
20 kn 1 n 0.15% + 1 l@W
aokn 10 n 0.25% + 1 IOd
2;: loo n 0.25% t 1 Ifi IkQ 0.25% + 1 IOOIIA
200Mn 10 kn 0.3 % t 1 IonA
2Gn loo kn 1.5 % t 1 1flA
2cGn IMn 1.5 % + 1 IllA
2ooGn IOMQ 1.5 % + 1 lti
MAXIMUM OPEN CIRCUIT VOLTAGE: 300VDC.
VOLTAGE SOURCE
OUTFWT: - 102V to t 102V in 50mV steps.
ACCURACY: 1 year, 18+.WC; f(0.2% t 5&W)
MAXIMUM OUTPUTCURRENT: &2mA, active current limit at <4mA
with annunciation.
4
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GENERAL
CONVERSION TIME: 33omsec.
MAXIMUM INPUT: 25W peak, DC to 80Hz sinewave, 10s per
minute max on m4 range.
ELECTROMETER MAX COMMON-MODE VOLTAGE: 5OOVpeak.
V-SOURCE MAX COMMON-MODE VOLTAGE: IOOVpsak.
ENVIRONMENT:
Operating: O°C to 50°C. 70% relative humidity up to 35OC.
storage: -2FPc to t65oc.
WARMUP: 1 hour to rated accuracy.
ENGINEERING UNITS CONVERSION
PREFIX 1 EXPONENT
femto-
pico-
nano-
micro-
milli-
kilo-
mega-
giga-
tera-
oeta-
IO- ‘6
lo- ‘2
10-s
10-e
10-3
103
106
109
10’2
10’5
5
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SAFETY PRECAUTIONS
1. Before operation, ground the instrument through a properly earth
grounded power receptacle.
2. Before servicing, disconnect the instrument from the power line, all
other equipment and consult the Model 617 instruction Manual.
3. Do not touch any terminals while the instrument is turned on or con-
nected to any other test equipment.
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DISPLAY ANNUNCIATORS
Readings can be displayed with either alpha exponents or numeric ax-
ponents. A front panel program toggles the exponent mode (see PRO-
GRAM FEATURES).
ALPHA EXPONENTS
mV or V: millivolts or volts.
kfl, MQ, Gg, M or PG: kilohms, megohms, gigohms, teraohms or
petaohms.
pA, nA, fl or mA: picoamps, nanoamps, microamps or milliamps.
nC or PC: nanocoulombs or picocoulombs.
NUMERIC EXPONENTS
Positive Exponents: 0 through 18.
Negative Exponente: -01 through - 12.
Example: A displayed exponent of - 12 = lo- 12.
Display Status-Three indicator lights define what is being read on the
display.
METER Indicator Light-Indicates that electrometer readings are be-
ing displayed.
SOURCE Indicator Light-Indicates that the voltage source
W-SOURCE) value is being displayed.
DATA Indicator Light-Indicates that the data store is in the recall
mode end a previously stored reading is being displayed. A flashing
DATA light indicates that the data store is full.
NOTE:
The DISPLAY button toggles the display between source and the cur-
rent mode (METER or DATA).
IEEE Status Indicators-The TALK, LISTEN and REMOTE indicators
are used when programming the instrument over the IEEE-488 bus.
These status lights are not operational during front panel instrument
operation.
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DISPLAY MESSAGES
The following massages will be displayed to flag errors or conditions as
they occur:
MESSAGE
OL
r.r.
n Err
b Err
t EN
. .
DESCRIPTION
Overrange input applied.
Displayed briefly on power up;
RAM test passed. Displayed con-
stantly; RAM test failed.
Number Error. Calibration or
voltage source value exceeds
limits.
Bus Error. Instrument pro-
grammed while not in remote or
an illegal command (IDDC) sent or
an illegal command option
UDDCO) sent.
Trigger Overrun Error. Instrument
triggered while processing reading
from previous trigger.
flashing decimal points on expo-
nent LEDs; not using stored cal
constants. Constant decimal
points; instrument in calibration
male
IEEE “address” Program message; in IEEE ad-
dress program.
dlSP Program message; in display
mode program.
CAL Program massage; in cal constant
program.
31inking AMPS light In V/I current overload.
3linking ZERO CHECK light In V/I zero check.
8
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