58 U1241A/U1242A User’s and Service Guide
6 Specifications and Characteristics
DC Specifications
Table 6 - 17 DC specifications with accuracy of ± (% of reading + No. of Least Significant
Digit)
[1] Input impedance: 10 MΩ (nominal).
[2] Current can be measured up to 440 mA continuously. An additional 0.2% needs to be added to the
specified accuracy if the signal measured is in the range of 440 mA to 1100 mA for 30 seconds
maximum. After measuring current of > 440 mA, leave the meter to cool down for twice the
measuring time used before application of low current measurement.
[3] Current can be measured up to 10 A continuously with the maximum operating temperature of
50 °C. An additional 0.3% needs to be added to the specified accuracy if the signal measured is in
the range of 10 A to 19.999 A for 15 seconds maximum. After measuring a current of > 10 A, leave
the meter to cool down for 60 seconds before applying low current measurement.
Function Range Resolution
Test Current/
Burden Voltage
Accuracy
U1241A U1242A
Voltage
[1]
1000.0 mV 0.1 mV - 0.09% + 5
10.000 V 0.001 V - 0.09% + 2
100.00 V 0.01 V -
1000.0 V 0.1 V - 0.15% + 5
Current 1000.0 μA0.1 μA < 0.06 V 0.1%+3
10000 μA1 μA < 0.55 V 0.1%+3
100.00 mA 0.01 mA < 0.18 V 0.2%+3
440.0 mA
[2]
0.1 mA < 0.8 V
0.5%+3
10.000 A
[3]
0.001 A < 0.4 V
0.6%+5
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