Frequency Counter Sensitivity; Burden Voltage (A, Ma, Μa); Input Characteristics - Fluke 187 Calibration Manual

Frequency Counter Sensitivity

Approximate VAC
Sensitivity (RMS Sine
Wave)
Input
15 Hz -
Range
2
100 kHz
50 mV 5 mV
500 mV 20 mV
3000 mV 500 mV
5 V 0.5 V
50 V 5 V
500 V 20 V
1000 V 100 V
1. Maximum input = 10 x Range (1000 V max). Noise at low frequencies and amplitudes may affect accuracy.
2. Useable at reduced sensitivity to 0.5 Hz and 1000 kHz.
3. Typical frequency bandwidth with full scale (or maximum 2 X 10
Burden Voltage (A, mA, µA)
Function
mA - µA
A

Input Characteristics

Function
Volts, mV
DC Volts, mV
AC Volts, mV
Ohms
Diode Test
500 Ω
Ohms 1 mA
Diode Test
1
VAC
Bandwidth
2
500 kHz
10 mV 1 MHz
20 mV 1 MHz
2000 mV 800 kHz
2.0 V 950 kHz
5.0 V 1 MHz
20 V 1 MHz
100 V > 400 kHz
Range
500.00 µA
5,000 µA
50.000 mA
400.00 mA
5.0000 A
10.000 A
Input Impedance (Nominal)
Common Mode Rejection Ratio
>100 dB at dc, 50 Hz or 60 Hz ±0.1%
> 90 dB dc to 60 Hz
Open Circuit Test Voltage
< 5 V
< 5 V
Typical Short-Circuit Current
5 kΩ 50 kΩ
100 µA 10 µA
Approximate
VDC Trigger
3 1
Levels
-5 mV & 5 mV
5 mV & 65 mV
140 mV & 200 mV
1.4 V & 2.0 V
0.5 V & 6.5 V
5 V & 65 V
5 V & 65 V
7
V-Hz product) RMS sine wave.
Burden Voltage (typical)
102 µV / µA
102 µV / µA
1.8 mV / mA
1.8 mV / mA
0.04 V / A
0.04 V / A
10 MΩ, < 100 pF
Normal Mode Rejection
>90 dB at 50 Hz or 60 Hz ± 0.1%
Full-Scale Voltage
To 5 MΩ
500 mV
500 kΩ 5 MΩ
1 µA 0.1 µA
1 mA typical
True RMS Multimeter
Frequency Counter Sensitivity
3
VDC Bandwidth
1 MHz
1 MHz
90 kHz
14 kHz
> 400 kHz
> 400 kHz
> 400 kHz
30 MΩ + nS
3.1 V
3.1000 V
30 MΩ
0.1 µA
9