Keithley 2303, Service Manual, Page: 37 / 104

2-12 Calibration
15. Disconnect the 4
Ω
resistor, then connect the characterized 30
Ω
resistor in its place. (See
Figure 2-5.)
Figure 2-5
Connections for 500mA range calibration
16. Make sure the DMM DC volts function and auto-ranging are still selected.
17. At this point, the unit will prompt to output approximately 500mA for 500mA range full-
scale calibration:
SOURCE 500 mA
ALL READY TO DO?
18. Press ENTER to output approximately 500mA. The unit will then prompt you for the
DMM reading:
SOURCE 500 mA
READ1 450.000 mA
19. Note the DMM voltage reading, then calculate the current from that voltage reading and
actual 30
Ω
resistance value. Adjust the Model 2303-PJ current display value to agree
with that value, and press ENTER.
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
STORE RECALL
CHAN SCAN
FILTER MATH
CONFIG MENU
HI
INPUT
LO
SENSE
Ω
4 WIRE
INPUTS
350V
PEAK
1100V
PEAK
AUTO
WARNING:
NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.
WARNING:
NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.
CAUTION:
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.
CAUTION:
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.
MADE IN
U.S.A.
LINE RATING
100-240VAC
50, 60 HZ
185VA MAX
LINE FUSE
SLOWBLOW
2.5A, 250V
IEEE-488
(CHANGE IEEE ADDRESS
WITH FRONT PANEL MENU)
REMOTE
DISPLAY
OPTION
ISOLATION FROM EARTH:
22 VOLTS MAX.
+ + +
_ _ _ _
+
SOURCE SENSE DVM IN SOURCE
OUTPUT
0-20V, 0-5A
Model 2001 DMM
Model 2303-PJ
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