Synchronization And Sampling; Voltage And Current Measurements; Voltage And Current Measurement Accuracy; Transient Voltage (Impulse) - Fluke 1750 Calibration Manual

1750
Calibration Manual

Synchronization and Sampling

PLL-Synchronization Source........................... The PLL synchronizes to the A-N voltage for wye power types, and to
PLL Lock Range................................................ 42.5 to 69 Hz
Sampling Frequency ........................................ Voltage and current: 256 samples/cycle
A/D Resolution .................................................. Voltage and current: 24 bits

Voltage and Current Measurements

Voltage Measurement Range........................... AC voltage: 1000 V rms
Voltage Crest Factor......................................... 3 or less
Voltage Input Impedance ................................. 2 M
Current Measurement Range........................... Depends on current probe used
Current Crest Factor......................................... 4 or less
Current Input Characteristics .......................... 2 V rms = full scale, 1 M Input Impedance for ferro CTs, low

Voltage and Current Measurement Accuracy

RMS Voltage
Measurement Type ............................................. True rms calculated continuously: every cycle, every 1/2 cycle, and
Measurement Uncertainty................................... AC:
RMS Current
Measurement Type ............................................. True rms calculated continuously: every cycle, every 1/2 cycle, and
Measurement Uncertainty................................... (0.1 % full scale + 0.5 % reading + current sensor accuracy, valid for
Current Accuracy ................................................ Ferromagnetic Clamps

Transient Voltage (Impulse)

Measurement Type ............................................. Waveshape sampling, not peak detect
Full Scale ............................................................ 8000 V pk
Sample Resolution.............................................. 200 nS
Measurement Uncertainty................................... 5 % reading

Dip (Sag) and Swell Measurements

Voltage Swell (rms swell)
Measurement Type ............................................. True rms (one cycle calculation by overlapping each half cycle)
Displayed Data ................................................... Amplitude and duration of swell
4
the A-B voltage for delta power types. All listed power types can be
characterized as either wye or delta.
Inter-harmonics per IEC61000-4-7: 2560 samples / 10 cycles (50 Hz),
3072 samples/12 cycles (60 Hz)
Transient Voltage: 5 MHz
Transient voltage: 14 bits
10 % Overrange
DC voltage: 1000 V + 10 % Overrange
impedance for Flexi-CTs
every 10 or 12 cycles at 50 or 60 Hz respectively, as required by IEC
61000-4-30.
0.2 % reading 0.1 % full scale above 50 V rms
DC: 0.5 % reading 0.2 % full scale above 50 V dc
If the ac component of a dc signal is below 40 V rms, the dc
uncertainty specification may have an offset.
every 10 or 12 cycles at 50 or 60 Hz respectively, as required by
standards
5 % to 100 % of current sensor range
(0.1 % full scale + 0.2 % reading + current sensor accuracy), valid for
5 % to 100 % of current sensor range
Flexible Current Probes
(0.1 % full scale + 0.5 % reading + current sensor accuracy), valid for
5 % to 100 % of current sensor range
20 V (test parameters: 1000 V dc, 1000 V rms,
100 kHz)
(voltage between lines is measured for 3P3W lines and phase voltage
is measured for 3P4W lines)