Datasheet
3
AC specifications
Function Range Resolution
Test current/
burden voltage
Accuracy ± (% of reading + counts of
least significant digit)
40 to 500 Hz 500 Hz to 1 kHz 1 to 2 kHz
AC voltage
8, 12
True RMS
1000.0 mV 0.1 mV –
1% + 5
2% + 5 –
10.000 V 0.001 V –
1% + 5
2% + 5
100.00 V 0.01 V –
1000.0 V 0.1 V – –
AC current
9, 12
True RMS
1000.0 µA 0.1 µA < 0.06 V (50 Ω)
1% + 5 1.5% + 5 –
10000 µA 1 µA < 0.55 V (50 Ω)
100.00 mA 0.01 mA < 0.18 V (0.5 Ω)
440.0 mA
10
0.1 mA < 0.8 V (0.5 Ω)
10.000 A
11
0.001 A < 0.4 V (0.01 Ω)
8. Input impedance: 10 MΩ (nominal) in parallel with < 100 pF, with overload protection of 1000 V RMS
9. Crest factor ≤ 3. For non-sinusoidal waveforms with crest factor up to 3, add 2% reading + 2% full scale typical.
10. Current can be measured from 50 mA 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 a current of > 440 mA, leave the meter to cool down for
twice the measuring time used before application of low current measurement.
11. Current can be measured from 0.5 A up to 10 A continuously with a 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 a low current measurement.
12. AC voltage and AC current specifications are AC coupled. True RMS measurement is valid from 5 % of range to 100 % of range.
Temperature specifications
Thermocouple type Range Resolution
Accuracy ± (% of reading +
offset error)
K (for U1241B and U1242B) –40 to 1000 ºC/–48 to 1832 ºF 0.1 °C /0.1 °F 1% + 1 ºC/1% + 1.8 °F
J (for U1242B only) –40 to 1000 ºC/–48 to 1832 ºF 0.1 ºC/0.1 ºF 1% + 1 ºC/1% + 1.8 °F
Capacitance specifications
Range Resolution Accuracy ± (% of reading + counts of least significant digit)
1000.0 nF 0.1 nF
1.2% + 410.000 µF 0.001 µF
100.00 µF 0.01 µF
1000.0 µF 0.1 µF
2% + 4
10.000 mF 0.001 mF
Harmonic ratio specifications
Range Frequency Voltage
0.0% to 99.9% 40 to 500 Hz 100 mVAC to 1000 VAC
Electrical Specifications