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Keithley 6487 Reference Manual

Keithley 6487
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C-12 DDC Emulation Commands Model 6487 Reference Manual
Figure C-1
U0 machine status word
TERMINATOR
0 = CR LF*
1 = LF CR
2 = CR
3 = LF
4 = None
PREFIX
READING SOURCE
0 = Picoammeter*
1 = One buffer reading
2 = All buffer readings
3 = Max. buffer reading
4 = Min. buffer reading
RANGE
0 = Auto Off
1 = Auto On*
1 = 2nA
2 = 20nA
3 = 200nA
4 = 2μA
5 = 20μA
6 = 200μA
7 = 2mA
8 = 20mA
DATA STORE SIZE
000 = Disabled*
nnn = 001 to 512 (size)
CAL LOCK
0 = Locked*
1 = Unlocked
SRQ MASK**
000 = SRQ Disabled*
001 = Reading Overflow
002 = Data Store Full
004 = Data Store 1/2 Full
008 = Reading Done
016 = Ready
032 = Error
128 = V-source Error
TRIGGER
0 = Continuous on Talk
1 = One-shot on Talk
2 = Continuous on Get
3 = One-shot on Get
4 = Continuous on “X”
5 = One-shot on “X”
6 = Continuous on Ext Trig*
7 = One-shot on Ext Trig
8 = Contiuous on Operate
9 = One-shot on Operate
*Default settings
Status Word
DISPLAY INTENSITY
0 = Normal*
1 = Dim (Characters)
2 = Off
ZERO CHECK
0 = Disabled*
1 = Enabled
V/I OHMS
0 = Disabled*
1 = Enabled
DATA FORMAT
0 = Rdg with prefix (ASCII)*
1 = Rdg without prefix (ASCII)
2 = Rdg, buffer location with prefix
3 = Rdg, buffer location without prefix
4 = Binary rdg, byte reversed
5 = Binary rdg, normal byte order
HIT BUTTON
01 = CONFIG
02 = I | Ω
03 = MATH
04 = FILT
05 = ZCHK
06 = REL
07 = OPER
08 = SOURCE Up
11 = RANGE Up
12 = AUTO
13 = RANGE Down
14 = ENTER
15 = Cursor Right
16 = SOURCE Down
17 = MENU
18 = COMM
19 = DISP
20 = TRIG
21 = LIMIT
22 = DIGITS
23 = RATE
24 = Cursor Left
26 = SAVE
27 = SETUP
28 = STORE
29 = RECALL
30 = AZERO
31 = DAMP
32 = EXIT
SELF TEST
0 = No error*
1 = ROM error
EOI, HOLD-OFF
0 = EOI & hold-off*
1 = No EOI, hold-off
2 = EOI, no hold-off
3 = No EOI, no hold-off
**Add up values for multiple SRQ conditions
RELATIVE
0 = Off*
1 = On
V-SOURCE
00 = 50V rg, 25μA lim
01 = 50V rg, 2.5mA lim*
10 = 500V rg, 25μA lim
11 = 500V rg, 2.5mA lim
OPERATE
0 = Off*
1 = On
FILTERS
0 = Both off
1 = A off, D on
2 = A on, D off
3 = Both on*
INTEGRATION
0 = Fast
1 = Line cycle*
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Keithley 6487 Specifications

General IconGeneral
TypePicoammeter/Voltage Source
Current Measurement Range20 fA to 20 mA
InterfacesGPIB, RS-232
Voltage Burden< 200 µV
Input Impedance>10^14 Ω
Power100 V / 120 V / 220 V / 240 V
Basic Current Measurement Accuracy0.4%

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