Section 13: Calibration Model 2601B-PULSE System SourceMeter Instrument Reference Manual
13-4 2601B-PULSE-901-01A April 2020
Figure 149: Pulse load schematic
Calibration limits
The calibration limits stated in this section have been calculated using only the 2601B-PULSE
one-year accuracy specifications. They do not include test equipment uncertainty. If a particular
measurement falls outside the allowable range, recalculate new limits based both on the
2601B-PULSE specifications and corresponding test equipment specifications.
Source limit calculations
As an example of how calibration limits are calculated, assume you are testing the 2601B-PULSE
6 V dc output range using a 5.4 V output value. Using the one-year accuracy specification for 5.4
V dc output of ± (0.02% of output + 1.8 mV offset), the calculated output limits are:
Output limits = 5.4 V ± [(5.4 V  0.02%) + 1.8 mV]
Output limits = 5.4 V ± (0.00108 V + 0.0018 V)
Output limits = 5.4 V ± 0.00288 V
Output limits = 5.39712 V to 5.40288 V
Measurement limit calculations
Measurement limits are calculated in the same way as the source limits, except that the limits are
calculated with respect to the measurement of the external reference instrument.
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