Fluke 87 - Frequency Counter Sensitivity; Burden Voltage (A, Ma, Μa)

Specifications
Frequency Counter Sensitivity
7
7-11
Frequency Counter Sensitivity
Minimum Sensitivity (RMS Sine Wave)
1
Approximate Trigger Levels
Input Range 40 Hz to 20 kHz
2
15 to 40 Hz
3
20 to 500 kHz
3
(DC Voltage Function)
50 mV (dB only) 15 mV to 3 mV 15 mV 15 mV ± 25 mV
500 mV 50 mV to 30 mV 50 mV 30 mV 35 mV ± 6 mV
3000 mV 1500 mV to 300 mV 2000 mV 2000 mV 170 mV ± 6 mV
5 V 1.5 V to 0.3 V 2 V 2.2 V 1.7 V ± 0.25 V
50 V 15 V to 3 V 15 V 5 V 3.5 V ± 2.5 V
500 V 50 V to 20 V 50 V 50 V 35 V ± 25 V
1000 V 250 V to 100 V 250 V 50 V 35 V ± 25 V
1. Maximum input for specified accuracy = 10 x Range or 1000 V, ac-coupled only. Accuracy: add 1 count.
2. Sensitivity improves linearly from 40 Hz to 20 kHz.
3. Useable at reduced sensitivity to 0.5 Hz and 1000 kHz.
Burden Voltage (A, mA, µA)
Function Range Burden Voltage (typical)
mA - µA 500.00 µA
102 µV / µA
5,000 µA 102 µV / µA
50.000 mA 1.8 mV / mA
400.00 mA 1.8 mV / mA
A 5.0000 A 0.04 V / A
10.000 A 0.04 V / A