User`s guide

5 Characteristics and Specifications
Electrical Specifications
138 U1273A/U1273AX User’s Guide
Electrical Specifications
DC specifications
NOTE
Specification assumptions are given on page 136.
Table 5- 1 DC voltage specifications
Function Range Resolution Accuracy Input impedance
Voltage
30 mV
[1]
0.001 mV 0.05% + 20 10 MΩ
300 mV
[1]
0.01 mV 0.05% + 5 10 MΩ
3 V 0.0001 V 0.05% + 5 11.11 MΩ
30 V 0.001 V 0.05% + 2 10.1 MΩ
300 V 0.01 V 0.05% + 2 10 MΩ
1000 V 0.1 V 0.05% + 2 10 MΩ
Z
LOW
(low input impedance)
enabled, applicable for 1000 V
range and resolution only
[2]
1% + 20 2 kΩ
Notes for DC voltage specifications:
1 The accuracy of the 30 mV to 300 mV range is specified after the Null function is used to subtract the thermal effect (by
shorting the test leads).
2 For Z
LOW
measurements, autoranging is disabled and the multimeter’s range is set to 1000 V in the manual ranging
mode.