Fluke 2635A Maximum Crest Factor, Crest Factor Error Input at Upper Frequency, Maximum AC Input

HYDRA

Service Manual

Table 1-3. 2620A/2625A Specifications (cont)

AC Voltage Inputs (True RMS AC Voltage, AC-Coupled Inputs) (cont)

Maximum Frequency

20 Hz - 50 Hz

50 Hz - 100 Hz

100 Hz - 10 kHz

10 kHz - 20 kHz

20 kHz - 50 kHz

50 kHz - 100 kHz

Input Impedance

1 MΩ in parallel with 100 pF maximum

Maximum Crest Factor

3.0 maximum

2.0 for rated accuracy

Crest Factor Error

Input at Upper Frequency

300V rms

300V rms

200V rms

100V rms

40V rms

20V rms

Non-sinusoidal input signals with crest factors between 2 and 3 and pulse widths 100 μs and longer add 0.2% to the accuracy specifications.

Common Mode Rejection

80 dB minimum at 50 or 60 Hz ±0.1%, 1 kΩ imbalance, slow rate

Maximum AC Input

300V rms or 424V peak on channels 0, 1, and 11

150V rms or 212V peak on channels 2 to 10 and 12 to 20 Voltage ratings between channels must not be exceeded

2x 106 Volt-Hertz product on any range, normal mode input

1x 106 Volt-Hertz product on any range, common mode input

DC Component Error

SCAN and first MONitor measurements will be incorrect if the dc signal component exceeds 60 counts in slow rate or 10 counts in fast rate. To measure ac with a dc component present, MONitor the input and wait 5 seconds before recording the measurement.

Using Channel 0

When measuring voltages above 100V rms, the rear Input Module must be installed to obtain the rated accuracy.

Crosstalk Rejection

Refer to "Crosstalk Rejection" at the end of this table.

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