11/01/05

6

ES51984

3 3/4 CAP AUTO DMM

Capacitance

Measurement accuracy

4nF range

-1.5

—

1.5

%F.S

-2

—

2

counts

40nF – 4µF

-0.8

—

0.8

%F.S

-2

—

2

counts

4µF~4mF

-1.1*

—

1.1*

%F.S

-2

—

2

counts

*The accuracy of 40uF range is 1.5%F.S

Function Description

1.Operating Modes

1.1 Voltage Measurement

A reconfigurable voltage divider automatically provides a suitable range in voltage

measurement mode. The following table summarizes the full scale ranges in each

configuration.

Configuration

Full Scale Range

Divider Ratio

Resister Connection

VR1

400.0mV

1

-

VR2

4.000V

1/10

R2 / (R1+R2)

VR3

40.00V

1/100

R3 / (R1+R3)

VR3

400.0V

1/1000

R4 / (R1+R4)

VR5

4000V

1/10000

R5 / (R1+R5)

1. 400.0 mV range only exists in manual mode.

2. In the 4000V range, if the digit number is larger than 1000V, LCD will display

“OL”.

The measurement of true RMS using ES636

If ES636 (or other true RMS-to-DC converter chip) is used for true RMS measurement,

the suggested application circuit is shown in Figure 1. When ES636 is used for true

RMS, make ADO and ADI pin short, keep TEST5 pin float, and connect ACVL pin to

SGND. And connect OVSG pin to AGND through a switch in ACV mode.