User`s guide

Characteristics and Specifications 5
Electrical Specifications
U1273A/U1273AX User’s Guide 139
Table 5- 2 Resistance specifications
Function Range Resolution Accuracy Test current
Resistance
[5]
30 Ω
[4]
0.001 Ω 0.2% + 10 0.65 mA
300 Ω
[4]
0.01 Ω 0.2% + 5 0.65 mA
3 kΩ
[4]
0.0001 kΩ 0.2% + 5 65 μA
30 kΩ 0.001 kΩ 0.2% + 5 6.5 μA
300 kΩ 0.01 kΩ 0.2% + 5 0.65 μA
3 MΩ 0.0001 MΩ 0.6% + 5 93 nA/10 MΩ
30 MΩ
[6]
0.001 MΩ 1.2% + 5 93 nA//10 MΩ
100 MΩ
[6][8]
0.01 MΩ - 93 nA//10 MΩ
300 MΩ
[8]
0.01 MΩ
2.0% +10 @ <100 MΩ
8.0% +10 @ >100 MΩ
93 nA//10 MΩ
300 nS
[7]
0.01 nS 1% + 10 93 nA//10 MΩ
Notes for resistance specifications:
1 Overload protection: 1000 VRMS for short circuits with <0.3 A current
2 Maximum open voltage is <+3.3 V.
3 Built-in buzzer beeps when the resistance measured is less than 25 Ω ± 10 Ω. The multimeter can capture intermittent
measurements longer than 1 ms.
4 The accuracy of the 30 Ω to 3 kΩ range is specified after the Null function is used to subtract the test lead resistance and
thermal effect (by shorting the test leads).
5 U1273AX only: The accuracy for all resistance ranges is specified after the Null function is used when measuring at
temperatures below –20 °C. The Null function is used to subtract the test lead resistance and thermal effect (by shorting
the test leads).
6 For the ranges of 30 MΩ and 100 MΩ, the RH is specified for <60%.
7 The accuracy for ranges <50 nS is specified after the Null function is used on an open test lead.
8 The temperature coefficient of the 100 MΩ and 300 MΩ ranges is 0.1 × (specified accuracy)/°C (from –40 °C to 18 °C or
28 °C to 55 °C).