11/01/05

10

ES51982

3 1/2 CAP AUTO DMM

2. Measurement Mode Switching

Measurement mode depends on the logic level of FC1, FC2, FC3, FC4, FC5, and KEY.

When FC5 is HIGH, the measurement modes are listed in the following table.

SLACDC FC1 FC2 FC3 FC4

Mode

Function of KEY

0

1

0

1

1

Voltage Measurement

DCV(initial) ↔ACV

0

1

1

0

1

Current Measurement(µA)

DCA(initial) ↔ACA

0

1

1

1

1

Current Measurement(mA)

DCA(initial) ↔ ACA

0

1

0

0

1

Manual Current Measurement(A)

DCA (initial) ↔ACA

0

0

0

0

0

Auto Current Measurement(A)

DCA(initial)

1

1

0

1

1

Voltage Measurement

ACV (initial) ↔DCV

1

1

1

0

1

Current Measurement(µA)

ACA(initial) ↔DCA

1

1

1

1

1

Current Measurement(mA)

ACA (initial) ↔DCA

1

1

0

0

1

Manual Current Measurement(A)

ACA (initial) ↔DCA

1

0

0

0

0

Auto Current Measurement(A)

ACA (initial)

X

0

0

1

1

Resistance Measurement

Ω ↔ Continuity

X

0

1

0

1

Resistance Measurement

Ω ↔ Diode

X

0

0

0

1

Continuity Check

Continuity Diode

X

0

1

1

1

Resistance Measurement

Ω ↔ Continuity ↔Diode

X

0

0

1

0

Frequency Measurement

—

X

0

1

1

0

Capacitance Measurement

—

X

0

1

0

0

Temperature(℃)

—

Ps. X means “don’t care”

When FC5 is LOW, KEY is disable. The corresponding measurement modes are list

below

SLACDC FC1 FC2 FC3 FC4

Mode

0

1

0

1

1

AC Voltage Measurement

0

1

1

0

1

AC Current Measurement(µA)

0

1

1

1

1

AC Current Measurement(mA)

0

1

0

0

1

Manual AC Current Measurement(A)

0

0

0

0

0

Auto AC Current Measurement(A)

1

1

0

1

1

DC Voltage Measurement

1

1

1

0

1

DC Current Measurement(µA)

1

1

1

1

1

DC Current Measurement(mA)

1

1

0

0

1

Manual DC Current Measurement(A)

1

0

0

0

0

Auto DC Current Measurement(A)

X

0

0

1

1

Resistance Measurement

X

0

1

0

1

Resistance Measurement

X

0

0

0

1

Continuity Check

X

0

1

1

1

Diode Measurement

X

0

0

1

0

Frequency Measurement

X

0

1

1

0

Capacitance Measurement

X

0

1

0

0

Temperature(℉)

Ps. X means “don’t care”