Fluke 189II/AN, Руководство по обслуживанию

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189II/AN
Service Manual
8
Frequency Counter Specifications
Function Range Resolution Accuracy
99.999 Hz 0.001 Hz 0.02 % + 5
999.99 Hz 0.01 Hz 0.005 % + 5
9.9999 kHz 0.0001 kHz 0.005 % + 5
99.999 kHz 0.001 kHz 0.005 % + 5
Frequency
(0.5 Hz to 999.99 kHz, pulse
width >0.5
μ
s)
999.99 kHz 0.01 kHz 0.005 % + 5
Duty Cycle
[1][2][3]
1.00 % to 99.00 % 0.01 % 0.2 % per kHz + 0.1 %
0.1000 ms 0.0001 ms 0.002 ms + 30 counts
1.000 ms 0.001 ms 0.002 ms + 3 counts
10.00 ms 0.01 ms 0.002 ms + 3 counts
Pulse Width
[1][2]
1999.9 ms 0.1 ms 0.002 ms + 3 counts
[1] For rise times <1
μ
s. Signals centered around trigger levels.
[2] 0.5 to 200 kHz, pulse width >2
μ
s. Pulse width range is determined by the frequency of the signal.
[3] For 10
μ
s < pulse width <25
μ
s add 1%. For 2
μ
s < pulse width
≤
10
μ
s add 3.5 %.
Frequency Counter Sensitivity
Approximate Voltage Sensitivity
(rms sine wave)
[1]
Input Range
15 Hz to 100 kHz
AC Bandwidth
[2]
Approximate DC
Trigger Levels
DC Bandwidth
[2]
50 mV 5 mV 1 MHz 5 mV & 20 mV 600 kHz
500 mV 25 mV 1 MHz 20 mV & 60 mV 1 MHz
5 V 0.25 V 700 kHz 1.4 V & 2.0 V 80 kHz
50 V 2.5 V 1 MHz 0.5 V & 6.5 V 1 MHz
500 V 25 V 300 kHz 5 V & 40 V 300 kHz
1000 V 50 V 300 kHz 5 V & 100 V 300 kHz
Approximate Current Sensitivity
(rms sine wave)
Input Range
15 Hz to 10 kHz
AC Bandwidth
Approximate DC
Trigger Levels
DC Bandwidth
500
μ
A 25
μ
A 100 kHz
5000
μ
A 250
μ
A
100 kHz
50 mA 2.5 mA 100 kHz
400 mA 25 mA 100 kHz
5 A 0.25 A 100 kHz
10 A 1.0 A 100 kHz
NA NA
[1] Maximum input = 10 x range (1000 V maximum, 2 x 10
7
V-Hz product maximum). Noise at low frequencies and amplitudes may
affect accuracy.
[2] Typical frequency bandwidth with full scale (or maximum 2 x 10
7
V-Hz product) rms sine wave.
MIN MAX, Recording, and Peak Specifications
Function Nominal Response Accuracy
200 ms to 80 % (dc function)
Specified accuracy ±12 counts for changes >425 ms in duration
in manual range.
MIN MAX, Recording
350 ms to 80 % (ac function)
Specified Accuracy ±40 counts for changes >1.5 s in duration in
manual range.
Peak 250
μ
S (peak)
[1]
Specified accuracy ±100 counts
[2]
up to 5,000 count (full range)
reading. For higher peak reading (to 12,000 counts), specified
accuracy ±2 %
[3]
of reading.
Crest Factor 350 ms to 80 % For periodic waveforms from 50 to 440 Hz ± (4 % + 1 count).
[1] For repetitive peaks; 2.5 ms for single events. Peak not specified for 500 µA DC, 50 mA DC, 5 A DC.
[2] 200 counts in 500 mV AC, 500
μ
A AC, 50 mA AC, 5 A AC.
[3] 3 % in 500 mV AC, 500
μ
A AC, 50 mA AC, 5 A AC.