Fluke 187 user manual Measuring Resistance, Capacitors before measuring resistance

Model 187 & 189
Users Manual
							Measuring Resistance
		189 LOGGING MULTIMETER					Caution
							To avoid possible damage to the meter or to
							the equipment under test, disconnect circuit
							power and discharge all high-voltage
AutoHOLD		FAST MN MX		LOGGING	YES		capacitors before measuring resistance.
HOLD		MIN MAX		REL
		CANCEL		SAVE	NO		Resistance is an opposition to current flow. The unit of
		Hz % ms		RANGE
SETUP		nS					resistance is the ohm (Ω ). The meter measures resistance
	ac+dc mV				F
				C			by sending a small current through the circuit.
ac+dc V					mA
ac+dc V					A
dB mV					A
	V				A		The meter’s resistance ranges are 500.00 Ω , 5.0000 kΩ	,
					ac+dc
dB					mA
	OFF				A		50.000 kΩ , 500.00 kΩ , 5.0000 MΩ , 30.000 MΩ , and
				VIEW
					ac+dc
				CLEAR MEM			500.0 MΩ .
					TEMPERATURE
A		mA		COM	V
		A
							To measure resistance, set up the meter as shown in
	10A MAX		400mA		CAT
	FUSED
			FUSED		1000V
							Figure 3-5.
							All pushbutton functions are available with resistance
							measurements. The blue key cycles to continuity and
							conductance measurement, which are described later in
					+		this chapter.
							Note
							In the Ohms Mode, a negative sign (-) on the
						ach002f.eps	display indicates the presence of voltage. This
							will cause reading errors.
Figure 3-4. DC Voltage Measurement

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