Fluke 189II/AN - Frequency Counter Specifications; MIN MAX, Recording, and Peak Specifications

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 μs)
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 μs. Signals centered around trigger levels.
[2] 0.5 to 200 kHz, pulse width >2 μs. Pulse width range is determined by the frequency of the signal.
[3] For 10 μs < pulse width <25 μs add 1%. For 2 μs < pulse width ≤10 μs 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 μA 25 μA
100 kHz
5000 μA 250 μA
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 μS (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 μA AC, 50 mA AC, 5 A AC.
[3] 3 % in 500 mV AC, 500 μA AC, 50 mA AC, 5 A AC.