Fluke 522A/6, Руководство оператора

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Introduction and Specifications
Additional Specifications
1
1-21
VARs When the Power Factor approaches 0.0, the Watts output uncertainty becomes unrealistic because the dominant
characteristic is the VARs (volts-amps-reactive) output. In these cases, calculate the Total VARs Output Uncertainty, as
shown in example 3:
Example 3 Output: 100 V, 1 A, 60 Hz, Power Factor = 0.174 (
Φ
=80)
Voltage Uncertainty Uncertainty for 100 V at 400 Hz is, 150 ppm + 2 mV, totaling:
100 V x 190 x 10
-6
= 15 mV added to 2 mV = 17 mV. Expressed in percent:
17 mV/100V x 100 = 0.017 % (see “AC Voltage (Sine Wave) Specifications”).
Current Uncertainty Uncertainty for 1 A is 0.05 %  100
μ
A, totaling:
1 A x 0.0005 = 500
μ
A added to 100
μ
A = 0.6 mA. Expressed in percent:
0.6 mA/1 A x 100 = 0.06 % (see “AC Current (Sine Waves) Specifications”).
VARs Adder VARs Adder for
Φ
=80 at 60 Hz is 0.03 % (see “Phase Specifications”).
Total VARS Output Uncertainty =
% 069 . 0 03 . 0 06 . 0 017 . 0
2 2 = + + 2
= U
VARs
Additional Specifications
The following paragraphs provide additional specifications for the 5522A Calibrator ac voltage and ac current functions.
These specifications are valid after allowing a warm-up period of 30 minutes, or twice the time the 5522A has been turned
off. All extended range specifications are based on performing the internal zero-cal function at weekly intervals, or when
the ambient temperature changes by more than 5
°
C.
Frequency
Frequency Range Resolution
1-Year Absolute Uncertainty,
tcal
±
5
°
C
Jitter
0.01 to 119.99 Hz 0.01 Hz
120.0 to 1199.9 Hz 0.1 Hz
1.200 to 11.999 kHz 1.0 Hz
12.00 to 119.99 kHz 10 Hz
120.0 to 1199.9 kHz 100 Hz
1.200 to 2.000 MHz 1 kHz
2.5 ppm +5
μ
Hz
[1]
100 nS
[1] With REF CLK set to ext, the frequency uncertainty of the 5522A is the uncertainty of the external 10 MHz clock
±
5
μ
Hz. The
amplitude of the 10 MHz external reference clock signal should be between 1 V and 5 V p-p.
Harmonics (2
nd
to 50
th
)
Fundamental
Frequency
[1]
Voltages
NORMAL Terminals
Currents
Voltages
AUX Terminals
Amplitude
Uncertainty
10 to 45 Hz 33 mV to 32.9999 V 3.3 mA to 2.99999 A 10 mV to 5 V
45 to 65 Hz 33 mV to 1020 V 3.3 mA to 20.5 A 10 mV to 5 V
65 to 500 Hz 33 mV to 1020 V 33 mA to 20.5 A 100 mV to 5 V
500 Hz to 5 kHz 330 mV to 1020 V 33 mA to 20.5 A 100 mV to 5 V
5 to 10 kHz 3.3 to 1020 V
33 to
329.9999 mA
100 mV to 5 V
10 to 30 kHz 3.3 to 1020 V
33 to
329.9999 mA
100 mV to
3.29999 V
Same % of
output as the
equivalent single
output, but twice
the floor adder.
[1] The maximum frequency of the harmonic output is 30 kHz (10 kHz for 3 to 5 V on the Aux terminals). For example, if the
fundamental output is 5 kHz, the maximum selection is the 6th harmonic (30 kHz). All harmonic frequencies (2nd to 50th) are
available for fundamental outputs between 10 Hz and 600 Hz (200 Hz for 3 to 5 V on the Aux terminals).
Phase Uncertainty ................................................. Phase uncertainty for harmonic outputs is 1 degree or the phase
uncertainty shown in “Phase Specifications” for the particular output,
whichever is greater. For example, the phase uncertainty of a 400 Hz
fundamental output and 10 kHz harmonic output is 10
°
(from “Phase
Specifications”). Another example, the phase uncertainty of a 60 Hz
fundamental output and a 400 Hz harmonic output is 1 degree.
Example of determining Amplitude Uncertainty in a Dual Output Harmonic Mode
What are the amplitude uncertainties for the following dual outputs?
NORMAL (Fundamental) Output:
100V, 100 Hz .................................................. From “AC Voltage (Sine Wave) Specifications” the single output
specification for 100V, 100 Hz, is 0.015 % + 2 mV. For the dual output