2-10
14. Press the Model 6517A ENTER key. The unit will
prompt for the exact calibration value:
19.000000 µA
Use
▲
,
▼
, , ,ENTER,EXIT,
or
INFO
15. Set the calibrator output to e19.000000µA DC,
make certain that the displayed value agrees with the
applied current, then press the ENTER key. During this
calibration phase, the unit will display the following:
Performing 20 µA cal
Table 2-4
Amps calibration summary (20pA–2µA ranges)
6517A
range
Calibrator
voltage
Resistance
1
standard
Nominal
2
current
—
20pA
20pA
200pA
200pA
2nA
2nA
20nA
20nA
200nA
200nA
2µA
2µA
0.00000V
1.900000V
-1.900000V
1.900000V
-1.900000V
1.900000V
-1.900000V
1.900000V
-1.900000V
19.00000V
-19.00000V
190.0000V
-190.0000V
100G
Ω
100G
Ω
100G
Ω
10G
Ω
10G
Ω
1G
Ω
1G
Ω
100M
Ω
100M
Ω
100M
Ω
100M
Ω
100M
Ω
100M
Ω
0pA
19pA
-19pA
190pA
-190pA
1.9nA
-1.9nA
19nA
-19nA
190nA
-190nA
1.9µA
-1.9µA
1
Actual resistance standard value determined from calibration data sup-
plied with standard.
2
Actual calibration current : I = V/R, where is the calibration voltage,
and R is the actual resistance standard value. When using the Model
5156 Electrometer Calibration Standard, the Model 6517A automati-
cally calculates the actual current from the actual standard value and the
calibrator voltage.
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.
INPUT
250V PEAK
!
LINE RATING
50-60HZ
50VA MAX
AC ONLY
LINE FUSE
SLOWBLOW
1/2A 90-125V
1/4A 180-250V
IEEE-488
(CHANGE IEEE ADDRESS
WITH FRONT PANEL MENU)
DIGITAL
I/O
TRIG LINK
115V
LO
HI
RS232
!
MADE
IN
U.S.A.
PREAMP OUT
250 PEAK
COMMON
2V ANALOG
OUTPUT
TEMP
TYPE K
HUMIDITY
OPTION SLOT
V SOURCE
EXT TRIG
IN
MTR COMP
OUT
INTERLOCK
SELECTED
LINE VOLTAGE
90-110V
105-125V
180-220V
210-250V
1010V
PEAK
750V
PEAK
Low-noise Coax BNC Cable
Triax-to-BNC Adapter
Model 6517 Electrometer
BNC-to-dual
Banana Plug
Adapter (Connect
Cable Shield to
Output LO)
DC Current Calibrator
Figure 2-4
Connections for 20µA–20mA range calibration
16. After this step has been completed, the instrument will
prompt for the next calibration value:
CONNECT -20.00000 µA
ENTER to continue; EXIT to abort
17. Set the calibrator output to exactly -19.00000µA DC,
then press the Model 6517A ENTER key. The unit will
then display the actual calibration value:
-19.000000 µA
Use
▲
,
▼
, , ,ENTER,EXIT,
or
INFO
18. If necessary, adjust the displayed value to agree with the
calibrator current, then press the ENTER key. During
this calibration step, the unit will display the following
message:
Performing -20 µA cal
19. Repeat steps 13 through 18 for the 200µA through
20mA ranges using the calibrator current values sum-
marized in Table 2-5.
Table 2-5
Amps calibration summary (20µA-20mA ranges)
6517A range
Calibration current
20µA
20µA
200µA
200µA
2mA
2mA
20mA
20mA
19.00000µA
-19.00000µA
190.0000µA
-190.0000µA
1.900000mA
-1.900000mA
19.00000mA
-19.00000mA