Keithley 2303, Service Manual, Page: 32 / 104

Calibration 2-7
6. Using the edit keys, adjust the display to agree with the new DMM voltage reading, then
press ENTER. The unit will then will then prompt for DVM full-scale calibration:
FULL SCALE DVM
ALL READY TO DO?
7. Press ENTER to complete DVM full-scale calibration.
8. Connect the digital multimeter volts input and characterized 4
Ω
resistor to the Model
2303 OUTPUT SOURCE terminals, as shown in Figure 2-3. Be sure to observe proper
polarity ( to DMM INPUT HI; SOURCE - to INPUT LO).
9. Be sure the digital multimeter DC volts function and auto-ranging are still selected.
Figure 2-3
Connections for 5A current calibration
10. At this point, the unit will prompt for 5A full-scale calibration output:
SOURCE 5 AMPS
SET 1.90000 A
11. Using the edit keys, adjust the set value to 1.9000A, then press ENTER. The unit will
then prompt you for the DMM reading, which calibrates the 5A current limit:
SOURCE 5 AMPS
READ1 1.90000 A
12. Note the DMM voltage reading, then calculate the current from that reading and the
actual 4
Ω
resistance value: I = V/R. Adjust the Model 2303 current display value to agree
with the calculated current 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
Input LO
Input HI
Source -
4
Ω
Resistor
Note: Use 4-wire connections
to resistor terminals.
Sense -
Sense +
深圳德标仪器
135-1095-0799