Fluke 187 user manual Input Characteristics

Model 187 & 189

Users Manual

Input Characteristics

Function

Volts, mV

Input Impedance (Nominal)

10 MΩ , < 100 pF

DC Volts, mV

AC Volts, mV

Common Mode Rejection Ratio

>100 dB at dc, 50 Hz or 60 Hz ±0.1%

> 90 dB dc to 60 Hz

Normal Mode Rejection

>90 dB at 50 Hz or 60 Hz ± 0.1%

Ohms

Diode Test

Open Circuit Test Voltage

<5 V

<5 V

Full-Scale Voltage

To 5 MΩ		30 MΩ + nS
500 mV		3.1 V
	3.1000 V

Typical Short-Circuit Current

Ohms

Diode Test

500Ω

1 mA

5 kΩ

100 ∝ A

50 kΩ	500 kΩ
10 ∝ A	1 ∝ A
1 mA	typical

5MΩ

0.1∝ A

30MΩ

0.1∝ A

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