Keithley 2303, Service Manual, Page: 21 / 104

1-10 Performance Verification
Table 1-5
5A range current readback accuracy limits
* As determined from digital multimeter and 1
Ω
resistor. See procedure.
Models 2303 and 2303B 5mA range readback accuracy
The following test applies only to the Models 2303 and 2303B:
1. With the power off, connect the digital multimeter and characterized 3k
Ω
resistor to the
Model 2303 or 2303B OUTPUT SOURCE terminals, as shown in Figure 1-4. Be sure
to observe proper polarity and connections (3k
Ω
resistor between and DMM
INPUT HI; SOURCE - to DMM INPUT LO).
Figure 1-4
Connections for Model 2303 and 2303B 5mA current verification tests
Nominal output
Voltage Model 2303
Output current* Current readback limits
(1 Year, 18°C-28°C)
1V 1.000A 0.9976 to 1.0024A
2V 2.000A 1.9956 to 2.0044A
3V 3.000A 2.9936 to 3.0064A
4V 4.000A 3.9916 to 4.0084A
4.9V 4.900A 4.8898 to 4.9102A
NEXT
PREV
POWER
DISPLAY
2001 MULTIMETER
DCV ACV DCI ACI
Ω
2
Ω
4
FREQ TEMP
REL TRIG
INFO LOCAL EXIT ENTER
RANGE
RANGE
!
F R
500V
PEAK
FRONT/REAR
2A 250V
AMPS
CAL
ST ORE RECALL
CHAN SCAN
FILTER MATH
CONFIGMENU
HI
INPUT
LO
SENSE
Ω
4 WIRE
INPUTS
350V
PEAK 1100V
PEAK
AUTO
W ARNING:
NO INTERNAL OPERAT OR SERVICABLE PAR TS,SERVICE BY QU ALIFIED PERSONNEL ONLY.
WARNING:
NO INTERNAL OPERAT OR SERVICABLE PARTS,SER VICE BY QU ALIFIED PERSONNEL ONL Y.
CAUTION:
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RA TING.
CAUTION:
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.
MADE IN
U.S.A.
LINE RATING
100-240V AC
50, 60 HZ
185VA MAX
LINE FUSE
SLOWBLO W
2.5A, 250V
IEEE-488
(CHANGE IEEE ADDRESS
WITH FR ONT PANEL MENU)
REMO TE
DISPLAY
OPTION
ISOLATION FROM EARTH:
22 VOL TS MAX.
+ + +
_ _ _ _
+
SOURCE SENSE D VM IN SOURCE
OUTPUT
0-20V, 0-5A
Model 2001 DMM
Model 2303
Input LO
Input HI
Source -
3k
Ω
Resistor
Note: Use 4-wire connections
to resistor terminals.
Sense -
Sense +
深圳德标仪器
135-1095-0799