6. Verify that the reading is 50 counts or less. Enable zero
6. Using the AMPS V/R (passive) current source, repeat
check.
steps 1 through 4 for the 2OOpA through 2pA ranges.
7. Remove the jumper connected between the COM and
chassis ground connectors.
Coulombs Verification
Amps Verification
Connect the Model 617 to the Model 263 as shown in
Figure 1 and perform amps verification as follows:
1. On the Model 617, enable zero check and select the
2OmA range. Do not use autorange.
2. Check that the display reads 0.000 *l count. If not,
enable zero correct.
3. Using the AMPS (active) current source, program the
Model 263 to output 19.OOOOmA to the Model 6l7.
4. Disable zero check and verify that the reading on the
Model 617 is within the limits in the table.
5. Using Table 1 as a guide, repeat steps 1 through 4 for
the 2mA through 2nA current ranges.
617
Range
2omA
2mA
200 pA
20 @A
2k4
2oon.A
20 nA
2nA
2OOpA,
Connect the Model 617 to the Model 263 as shown in
Figure 1 and perform coulombs verification as follows:
1. Using the COUL (ahive) charge source of the Model 263,
select the 2nC range.
2. Place the Model 263 in the coulombs function, and per-
form zero correction by enabling zero check and zero
correct in that order.
3. Release zero check on the Model 617.
4. Program the Model 263 for 1.9OOOOnC and press
OPERATE to source charge to the Model 617.
5. Verify that the Model 617 reads between 1.8943 and
1.9057nC.
Table 1. Limits for Amps Verification
263
Function
AMPS
AMPS
2%
AMPS
ZE
AMPS
AMPS V/R
*Includes Model 263 Error
263 Output
19.oOOOmA
1.9oooomA
19O.ooO fiA
19.0000 /LA
1.90000 pA
190.ooo IL4
19.cmO IL4
1.90000 IL4
190.000 pA
19.CNKl pA
1.9OQOO pA
l-
t
Allowable Reading’
(WC to 28°C)
18,978 to 19.022
1.8973 to 1.9027
189.76 to 190.24
18.976 to 19.024
1.8973 to 1.9027
189.59 to 190.41
18.965 to 19.035
1.8962 to 1.9038
18745 to 192.55
18.770 to 19.230
1.8811 to 1.9189
MODEL 617
,
Figure 1. Amps Verification Setup
A-3
To Next Page
Loading...
