Zero Offset Verification

This procedure checks the instrument’s zero offset performance. Verification checks are only performed for those functions and ranges with unique offset calibration constants. Measurements are checked for each function and range as described below.

  1. Make sure you have read Test Considerations.
  2. Install the 34172B Calibration Short (or equivalent) on the front panel input terminals. Select the Front input terminals with the Front/Rear switch.
  3. Configure each function and range in the order shown in the table below corresponding to the DMM model number. Make a measurement and return the result. Compare measurement results to the test limits shown below.
  4. Install the 34172B Calibration Short (or equivalent) on the rear-panel input terminals. Select the Rear input terminals with the Front/Rear switch.
  5. Configure each function and range in the order shown in the table below corresponding to the DMM model number. Make a measurement and return the result. Compare measurement results to the test limits shown below.

Values for 34460A DMM
Error from Nominal
Input Function[1] Range Quick
Check		 24 hours 90 days 1 year 2 years
Open DC Current 100 µA Q ± 0.02 µA ± 0.025 µA
1 mA ± 0.060 µA
10 mA ± 2 µA
100 mA ± 4 µA ± 5 µA
1 A ± 60 µA ± 100 µA
3 A ± 600 µA
Short DC Volts 100 mV Q ± 6 µV ± 6.5 µV
1 V ± 9 µV ± 10 µV
10 V ± 40 µV ± 50 µV
100 V ± 600 µV
1000 V ± 6 mV ± 10 mV
Short 4-wire Ohms 100 Ω ± 6 mΩ ± 7 mΩ
1 kΩ ± 8 mΩ ± 10 mΩ
10 kΩ Q ± 50 mΩ ± 100 mΩ
100 kΩ ± 500 mΩ ± 1 Ω
1 MΩ ± 10 Ω
10 MΩ ± 100 Ω

[1]Select 10 PLC.
Q: Quick performance verification test point.

Values for 34461A DMM
Error from Nominal
Input Function[1] Range Quick
Check		 24 hours 90 days 1 year 2 years
Open DC Current 100 µA Q ± 0.02 µA ± 0.025 µA
1 mA ± 0.060 µA
10 mA ± 2 µA
100 mA ± 4 µA ± 5 µA
1 A ± 60 µA ± 100 µA
3 A ± 600 µA
10 A ± 1 mA
Short DC Volts 100 mV Q ± 3 µV ± 3.5 µV
1 V ± 6 µV ± 7 µV
10 V ± 40 µV ± 50 µV
100 V ± 600 µV
1000 V ± 6 mV ± 10 mV
Short 4-wire Ohms 100 Ω ± 3 mΩ ± 4 mΩ
1 kΩ ± 5 mΩ ± 10 mΩ
10 kΩ Q ± 50 mΩ ± 100 mΩ
100 kΩ ± 500 mΩ ± 1 Ω
1 MΩ ± 10 Ω
10 MΩ ± 100 Ω

[1]Select 10 PLC.
Q: Quick performance verification test point.

Values for 34465A DMM
Error from Nominal
Input Function[1] Range Quick
Check		 24 hours 90 days 1 year 2 years
Open DC Current 1 µA   ± 50 pA (50E-12 A)[2]
10 µA   ± 200 pA (± 200.0E-12 A)[2]
100 µA Q ± 0.001 µA[2]
1 mA ± 0.030 µA ± 0.050 µA
10 mA ± 2 µA
100 mA ± 4 µA ± 5 µA
1 A ± 60 µA ± 100 µA
3 A ± 600 µA
10 A ± 1 ma
Short DC Volts 100 mV Q ± 3 µV ± 3.5 µV
1 V   ± 4 µV
10 V ± 30 µV ± 40 µV
100 V ± 600 µV
1000 V ± 6 mV
Short 4-wire Ohms 100 Ω ± 3 mΩ ± 4 mΩ
1 kΩ ± 5 mΩ
10 kΩ Q ± 50 mΩ
100 kΩ ± 500 mΩ
1 MΩ ± 5 Ω
10 MΩ ± 100 Ω
Short 2-wire Ohms 100 MΩ   1 kΩ

[1]Select 10 PLC.

[2]These values are typical and these ranges are calibrated internally.
Q: Quick performance verification test point.

Values for 34470A DMM
Error from Nominal
Input Function[1] Range Quick
Check		 24 hours 90 days 1 year 2 years
Open DC Current 1 µA   ± 50 pA (50E-12 A)[2]
10 µA   ± 200 pA (± 200.0E-12 A)[2]
100 µA Q ± 0.001 µA[2]
1 mA ± 0.030 µA ± 0.050 µA
10 mA ± 2 µA
100 mA ± 4 µA ± 5 µA
1 A ± 60 µA ± 100 µA
3 A ± 600 µA
10 A ± 1 ma
Short DC Volts 100 mV Q ± 3 µV ± 3.5 µV
1 V   ± 4 µV
10 V ± 20 µV
100 V ± 600 µV
1000 V ± 6 mV
Short 4-wire Ohms 100 Ω ± 3 mΩ ± 4 mΩ
1 kΩ ± 5 mΩ
10 kΩ Q ± 50 mΩ
100 kΩ ± 500 mΩ
1 MΩ ± 5 Ω
10 MΩ ± 100 Ω
Short 2-wire Ohms 100 MΩ   1 kΩ

[1]Select 10 PLC.

[2]These values are typical and these ranges are calibrated internally.
Q: Quick performance verification test point.