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256 L4400 User’s Guide
A L4451A and L4452A Calibration Procedures
Voltage Output Verification
1 With the DMM disconnected from the L4451A, set the DMM to the
100V range or the lowest range that can measure 16V (do not use
autorange).
2 Short the inputs to the DMM. The DMM reading is the offset voltage
for the selected range. If the DMM has “null” capability, turn it on at
this time. Otherwise, record the offset which will be subtracted from
the subsequent voltage measurements.
3 Connect channel 1 of the L4451A as shown in Figure A-2. Configure
the L4451A to output the voltages listed in Table A- 2. For each
voltage level measured, subtract the offset voltage recorded in Step 2
as applicable. The results should be within the limits listed in Table
A- 2.
4 Repeat Step 3 for L4451A channels 2, 3, and 4.
Table A-2. L4451A Output Current and Voltage Levels.
NOTE
It is not necessary to test the voltage output at the full rated 10 mA load. If
you test the output using a load, connect the sense terminals.
Output Current
Error From Nominal
(90 day)
20 ma ± 23
µA
15 mA ± 18.5
µA
10 mA ± 14
µA
5 ma ± 9.5
µA
0 mA
[1]
± 5 µA
-5 mA ± 9.5
µA
-10 ma ± 14
µA
-15 mA ± 18.5
µA
-20 mA ± 23
µA
[1] Apply a measured “0” offset to this
measurement