Appendix B: Calibration
Series 2600B System SourceMeter® Instrument Reference Manual
B-4
2600BS-901-01 Rev. C / August 2016
Verification limits
The verification limits stated in this section have been calculated using only the Series 2600B one-
year accuracy specifications, and they do not include test equipment uncertainty. If a particular
measurement falls outside the allowable range, recalculate new limits based both on the Series
2600B specifications and corresponding test equipment specifications.
Source limit calculations
As an example of how verification limits are calculated, assume you are testing the Model
2601B/2602B/2604B 6 V DC output range using a 5.4 V output value. Using the Model
2601A/2602A/2604B one-year accuracy specification for 5.4 V DC output of ± (0.02% of 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
Similarly, assume you are testing the Model 2611B/2612B/2614B/2634B/2635B/2636B 20V DC
output range using an 18 V output value. Using the Model 2611B/2612B/2614B/2634B/2635B/2636B
one-year accuracy specification for 18 V DC output of ± (0.02% of 5 mV offset), the
calculated output limits are:
Output limits = 18 V ± [(18 V
×
0.02%) + 5 mV]
Output limits = 18 V ± (0.0036 V + 0.005 V)
Output limits = 18 V ± 0.0086 V
Output limits = 17.9914 V to 18.0086 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.
Restoring factory defaults
Before performing the verification procedures, restore the instrument to its factory front panel (bench)
defaults as follows:
1. Press the
MENU
key.
2. Scroll to the
SETUP
menu item (by turning the navigation wheel ), and then press the
ENTER
key.
3. Scroll to the
RECALL
menu item, and then press the
ENTER
key.
4. Scroll to the
INTERNAL
menu item, and then press the
ENTER
key.
5. Scroll to the
FACTORY
menu item.
6. Press the
ENTER
key to restore defaults.
