Fluke 725Ex - Ohms Measurement; Ohms Source; Frequency Measurement; Frequency Source

725Ex
Calibration Manual
6
Ohms Measurement
Accuracy ± Ω*
Ohms Range
4-Wire 2- and 3-Wire
0 to 400 Ω 0.1 0.15
400 to 1.5 kΩ 0.5 1.0
1.5 to 3.2 kΩ 1 1.5
Temperature coefficient -10 °C to 18 °C, +28 °C to 55 °C: ±0.005 % of range per °C
Excitation Current: 0.2 mA
Maximum input voltage: 30 V
* 2-wire: Does not include lead resistance.
3-wire: Assumes matched leads with a total resistance not exceeding 100 Ω.
Ohms Source
Ohms Range
Excitation Current from
Measurement Device
Accuracy
± Ω
15 to 400 Ω 0.15 to 0.5 mA 0.15
15 to 400 Ω 0.5 to 2 mA 0.1
400 to 1.5 kΩ 0.05 to 0.8 mA 0.5
1.5 to 3.2 kΩ 0.05 to 0.4 mA 1
Temperature coefficient -10 °C to 18 °C, +28 °C to 55 °C: ± 0.005 % of resistance range per °C
Resolution
15 to 400 Ω 0.1 Ω
400 to 3.2 kΩ 1 Ω
Frequency Measurement
Range Resolution Accuracy
2.0 to 1000.0 CPM 0.1 CPM ± (0.05 % + 1 count)
1 to 1000 Hz 1.0 Hz ± (0.05 % + 1 count)
1.0 to 10.0 kHz 0.1 kHz ± (0.05 % + 1 count)
Sensitivity: 1V peak-to-peak minimum
Waveform: squarewave
Frequency Source
Range Resolution
Accuracy
(% of output frequency)
2.0 to 1000.0 CPM 0.1 CPM ± 0.05 %
1 to 1000 Hz 1 Hz ± 0.05 %
1.0 to 10.0 kHz 0.1 kHz ± 0.25 %
Waveform: 5 V p-p squarewave, -0.1 V offset