Frequency Counter Specifications; Frequency Counter Sensitivity; Min Max, Recording, And Peak Specifications - Fluke 189II/AN Service Manual

189II/AN
Service Manual

Frequency Counter Specifications

Function
Frequency
(0.5 Hz to 999.99 kHz, pulse
width >0.5 μs)
[1][2][3]
Duty Cycle
[1][2]
Pulse Width
For rise times <1 μs. Signals centered around trigger levels.
[1]
0.5 to 200 kHz, pulse width >2 μs. Pulse width range is determined by the frequency of the signal.
[2]
For 10 μs < pulse width <25 μs add 1%. For 2 μs < pulse width ≤10 μs add 3.5 %.
[3]

Frequency Counter Sensitivity

Input Range
50 mV
500 mV
5 V
50 V
500 V
1000 V
Input Range
500 μA
5000 μA
50 mA
400 mA
5 A
10 A
[1] Maximum input = 10 x range (1000 V maximum, 2 x 10
affect accuracy.
[2] Typical frequency bandwidth with full scale (or maximum 2 x 10

MIN MAX, Recording, and Peak Specifications

Function
MIN MAX, Recording
Peak
Crest Factor
[1] For repetitive peaks; 2.5 ms for single events. Peak not specified for 500 µA DC, 50 mA DC, 5 A DC.
200 counts in 500 mV AC, 500 μA AC, 50 mA AC, 5 A AC.
[2]
3 % in 500 mV AC, 500 μA AC, 50 mA AC, 5 A AC.
[3]
8
Range
99.999 Hz
999.99 Hz
9.9999 kHz
99.999 kHz
999.99 kHz
1.00 % to 99.00 %
0.1000 ms
1.000 ms
10.00 ms
1999.9 ms
Approximate Voltage Sensitivity
[1]
(rms sine wave)
15 Hz to 100 kHz
5 mV
25 mV
0.25 V
2.5 V
25 V
50 V
Approximate Current Sensitivity
(rms sine wave)
15 Hz to 10 kHz
25 μA
250 μA
2.5 mA
25 mA
0.25 A
1.0 A
Nominal Response
200 ms to 80 % (dc function)
350 ms to 80 % (ac function)
[1]
250 μS (peak)
350 ms to 80 %
Resolution
0.001 Hz
0.01 Hz
0.0001 kHz
0.001 kHz
0.01 kHz
0.01 %
0.0001 ms
0.001 ms
0.01 ms
0.1 ms
Approximate DC
[2]
AC Bandwidth
Trigger Levels
1 MHz 5 mV & 20 mV
1 MHz 20 mV & 60 mV
700 kHz
1 MHz
300 kHz
300 kHz
Approximate DC
AC Bandwidth
Trigger Levels
100 kHz
100 kHz
100 kHz
100 kHz
100 kHz
100 kHz
7
V-Hz product maximum). Noise at low frequencies and amplitudes may
7
V-Hz product) rms sine wave.
Specified accuracy ±12 counts for changes >425 ms in duration
in manual range.
Specified Accuracy ±40 counts for changes >1.5 s in duration in
manual range.
Specified accuracy ±100 counts
reading. For higher peak reading (to 12,000 counts), specified
[3]
accuracy ±2 % of reading.
For periodic waveforms from 50 to 440 Hz ± (4 % + 1 count).
Accuracy
0.02 % + 5
0.005 % + 5
0.005 % + 5
0.005 % + 5
0.005 % + 5
0.2 % per kHz + 0.1 %
0.002 ms + 30 counts
0.002 ms + 3 counts
0.002 ms + 3 counts
0.002 ms + 3 counts
DC Bandwidth
600 kHz
1 MHz
1.4 V & 2.0 V 80 kHz
0.5 V & 6.5 V 1 MHz
5 V & 40 V 300 kHz
5 V & 100 V 300 kHz
DC Bandwidth
NA NA
Accuracy
[2]
up to 5,000 count (full range)
[2]