Appendix B: Verification and adjustment
Series 3700A System Switch/Multimeter Reference Manual
B-4
3700AS-901-01 Rev. D/June 2018
Calculating resistance reading limits
Resistance reading limits must be recalculated based on the actual calibration resistance values
supplied by the equipment manufacturer. Calculations are performed in the same manner as shown
in the preceding example. Use the actual calibration resistance values instead of the nominal values
in the example when performing your calculations.
For example, assume that you are testing the 10
kΩ range using an actual 10.03 kΩ calibration
resistance value. Using Series 3700A one-year 10
kΩ range accuracy of
(30 ppm of r
3 ppm of range), the calculated reading limits are:
Reading limits = 10.03
kΩ ± [(10.03 kΩ x 30 ppm) + (10 kΩ x 3 ppm)]
Reading limits = 10.03
kΩ ± [(0.3009) + (0.03)] Ω
Reading limits = 10.03
kΩ ± 0.3309 Ω
Reading limits = 10.029669
kΩ to 10.030331 kΩ
Restoring factory defaults
To restore the instrument to its factory front-panel (bench) defaults before performing the verification
procedures:
1. Press the
MENU
key.
2. Turn the navigation wheel to highlight
SETUP
and then press the
ENTER
key.
3. Turn the navigation wheel to highlight
RESET
and then press the
ENTER
key.
Performing the verification test procedures
The following topics provide a summary of calibration verification test procedures and items to
consider before performing any calibration verification test.
Test summary
•
(on page B-5)
•
(on page B-7)
•
Verifying DC current 10 µA to 100 µA ranges
(on page B-9)
•
Verifying DC current 1 mA to 3 A ranges
(on page B-10)
•
Verifying AC current 1 mA to 3 A ranges
(on page B-12)
•
(on page B-13)
•
(on page B-14)
•
(on page B-15)
•
Verifying dry circuit resistance
(on page B-16)
•
Verifying 1 Ω and 10 Ω resistance ranges
(on page B-18)
•
Verifying zeros using a 4-wire short
(on page B-19)
If the Series 3700A is not within specifications and not under warranty, adjust the instrument.