11/01/05

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ES51982

3 1/2 CAP AUTO DMM

OVSG

OR1

VR5

VR4

VR3

VR2

TEST5

ACVL

ACVH

ADI

ADO

1.111M

101K

10K

1K

100

ACV

1

2

3

4

5

6

7

14

13

12

11

10

9

8

2.2u

+

+Vs

+Vs

-Vs

500K

10K

150

-Vs

2.2u

+

1k

AGND

4.7u

22k

Figure 1. the ture RMS measurement using ES636

1.2 Resistance Measurement

A reconfigurable divider automatically provides a suitable full scale range in resistance

measurement mode. The following table summarizes the full scale ranges and the

reference resistors in each configuration.

Configuration

Full Scale Range

Divider Ratio

Resister Connection

OR1

200.0Ω

R6

100Ω

OR2

2.000KΩ

R5

1KΩ

OR3

20.00KΩ

R4

10KΩ

OR4

200.0KΩ

100KΩ

OR5

2.000MΩ

1MΩ

OR6

20.00MΩ

R1

10MΩ