Keysight Technologies DAQ970A Service Manual page 72

3 Performance Verification
Ohms gain verification test
Input
Function
100 Ω
1 kΩ
4-wire
10 kΩ
ohms
100 kΩ
1 MΩ
10 MΩ
10 MΩ
2-wire
[d][e]
ohms
100 MΩ
[a] Q: Quick performance verification test points.
[b] For Channel 321, select NPLC 10.
[c] Fluke 5720A/5730A calibrator: Enable [EX SNS] (external sense) for 4-wire ohms measurement.
[d] For 2-wire ohms, use Math NULL, otherwise an additional 2 Ω error must be added.
[e] Fluke 5720A/5730A calibrator: Enable 2-wire ohms compensation (for 2-Wire ohms measurement ≤110 kΩ).
[f] The 100 MΩ range is for 2-wire ohms only.
DC current gain verification test
Input
Function
1 A
DC current
100 mA
10 mA
1 mA
[a] Q: Quick performance verification test points.
[b] For Channel 321, select NPLC 10.
72
Channel 302
[b]
Range
100 Ω
1 kΩ
10 kΩ
[c]
100 kΩ
1 MΩ
10 MΩ
10 MΩ
[f]
100 MΩ
Channel 321
[b]
Range
1 A
100 mA
10 mA
1 mA
Quick
[a]
check
24 hours
±8 mΩ
Q ±27 mΩ
±250 mΩ
±2.5 Ω
±25 Ω
±1.1 kΩ
Q ±1.1 kΩ
±101 kΩ
Quick
[a]
check
24 hours
Q ±560 μA
±14 μA
Q ±2.7 μA
±100 nA
Keysight DAQ970A/DAQ973A Service Guide
Error from nominal
90 days 1 year
±11 mΩ ±12 mΩ
±37 mΩ ±47 mΩ
±350 mΩ ±450 mΩ
±3.5 Ω ±4.5 Ω
±65 Ω ±75 Ω
±2.1 kΩ ±2.60 kΩ
±2.1 kΩ ±2.60 kΩ
±251 kΩ ±351 kΩ
Error from nominal
90 days 1 year
±800 μA ±900 μA
±35 μA ±55 μA
±5 μA ±7 μA
±350 nA ±550 nA
2 years
±13 mΩ
±57 mΩ
±550 mΩ
±5.5 Ω
±85 Ω
±3.1 kΩ
±3.1 kΩ
±401 kΩ
2 years
±1.1 mA
±65 μA
±8 μA
±650 nA