6.5 PERFORMANCE VERIFICATION RECORD
Appendix G of this manual contains a performance
verification record for organizations that need to keep track
of verification results. The tables in this record are struc-
tured so that they can be used in place of the verification
tables in this section. If using the verification record, make
copies of the original form. The originsl form should not
be written on or removed from this manual. If using the
tables in thii section, use a pencil for recording data. This
allows the data to be errased so that the tables can be us-
ed again in the future.
6.6 VERIFICATION PROCEDURES
The following paragraphs contain procedures for verify-
ing instrument accuracy, These procedures are intended
for use only by qualified personnel using accurate and
reliable test equipment. If the instrument is out of specifica-
tion, refer to Section 8 for calibration procedures, unless
the unit is still under warranty.
6.6.1 VOLTS Accuracy Verification
Using Table 6-2, perform the following steps to verify the
accuracy of the Model 263 voltage source:
1. ,Zero correct the Model 196 as follows:
A. Set the Model 1% to the 3CQmV range and short
the input.
B. If the display does not read oOO.OOOOmV, press the
ZERO button to zero out the offset.
C. Remove the short from the input.
NOTE
If using a DMM that does not have zero correction
capability, record the zero offset and subtract it from
the subsequent voltage measurements to determine
the actual output of the Model 263.
2. Connect the Model 263 to the Model 196 as shown in
Figure 6-1.
3. Set the Model 263 to the 2OOmV range and the Model
196
to the 3OOmV range.
4. Program the Model 263 to output OO.OOOmV.
5. Verify that the reading on the Model 196 is OO.OOOOmV
fl%V.
6. Program the Model 263 to output 2O.OOOmV (1110 full
scale) and verify that the reading on the Model 196 is
2o.oooomv m5fiv
7.
Program the Model 263 to output -2O.CCOmV (by press-
ing the * button) and verify that the reading on the
Model 196 is -2O.OCQnV *l%5~V.
8. Program the Model 263 to output lOO.OOOmV (112 full
scale) and verify that the reading is lOO.OOOmV f27.5~V.
9. Program the Model 263 to output -1OO.C0OmV and
verify that the reading is -1OO.OOOmV &27.5pV.
10. Program the Model 263 to output 19O.OOOmV (near full
scale) and then -19O.OOOmV and verify that the
readings are ~19O.M)OmV *38.7pV.
11. Using Table 6-2 as a guide, repeat the basic procedure
in steps 3 through 10 to verify the 2V and 20V ranges
of the Model 263.
,- VOLTS OHMS
MODEL 263
MODEL 196 (
ADAPTERS REWIRED :
Figure
6-1. VOLTS Accuracy Checks
6-2
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