PERFORMANCE VERIFICATION
1
6.6.5 AMPS (20~ A-
Table 6-5. AMPS (200pA-2mA) Accuracy Checks
5450A
196
Resistor setup
Calculated Output
Current
Range
(Nominal) (Figure) 196 Reading + 5450A Reading = Current
3V
IOOkQ
6-4
+
3v I OOkc2 6-4
~-
3v
I OOkR
6-4
+
3V lOOkS1
6-4
3V
IOkn
6-3
.t
3v Ikcl 6-3
+
Allowable Calculated
Current
(18°C to 28°C)
9.9965pA to 10.0035pA
-9.9965pA to -10.0035pA
18.9943pA to -19.0057pA
-18.9943pA to -19.0057pA
lR9.943pA to 190.057pA
1.89943mA to l.YO057mA
,2pA)
Accuracy Checks
10. To determine the actual current output by the Model
Using Table 6-6, perform the following steps to verify the
accuracy of the 20pA through 2pA ranges of the active cur-
rent source:
1. Connect the Model 263 to the Model 196 and Fluke
Model 54SOA as shown in Figure 6.4.
2.
On
the Model 196, enable the FILTER using a filter
value of 60.
3. Set the Model 263 to the 20pA range, the Model 196 to
the 300mV range, and the Model 5450A to output
IOOMQ (nominal).
4. Program the Model 263 to output 19.0000pA and allow
the reading on the Model 196 to settle (approximately
one minute).
5. Record the settled positive voltage reading in Table 6.6.
6. On the Model 263, press the *button to source negative
current.
7. After allowing the reading to settle, record the negative
voltage reading in the table.
8. Add the absolute values of the two readings and divide
by two. Record this average voltage reading in
Table 6-6 in the column titled “196 Avg”.
9. Record the resistance reading of the Model 54SOA in
263, divide the average voltage reading of the Model
196 by the resistance reading on the Model 54SOA.
Il. Verify that the calculated current is within the limits
listed in the table.
12. Using Table 6-6 as a guide, repeat the basic procedure
in steps 3 through 11 to verify the 200pA through 2pA
ranges.
6.6.6 AMPS V/R Functional Checks
Using Table 6-7, perform the following steps to verify that
the passive current (AMPS V/R) source is functional:
1. Connect the Model 263 to the Model 617 as shown in
Figure 6-2.
2. Set the Model 263 and Model 617 to the 200pA range,
3. Program the Model 263 to output OO.OOOpA.
4. On the Model 617 press the SUPPRESS button to zero
the display.
5. Program the Model 263 to output 190.000pA and verify
that the reading on the Model 617 is 190.00GpA
f3.0SpA.
6. On the Model 617, disable SUPPRESS.
7. Using Table as a etude, reneat steos 2 throueh 5 for the
the table.
200pA range.
ADAPTERS REoUlREo :
MODEL 186 MODEL 263
FLUKE 545oA
RESISTANCE CAUBRATOR
Figure 6-4. AMPS (20pA-2pA Ranges) Accuracy Checks
6-7
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