Ver. 3.2

10/06/23

10

ES51921

22,000 Counts Auto DMM

1.4 Current measurement for clampmeter

ES51921 has 2 automatic and 4 manual current measurement modes for clampmeter.

The following table summarizes the full-scale range of each mode. When ES51921

operate in the automatic mode1&2, it takes high input from IVSH/IVSL (higher

range/lower range), low input from SGND and reference voltage from VR. When

ES51921 operates in the manual mode1~4, It takes high input from ADP, low input

from SGND and reference voltage from VA+ and VA-.

Mode

FC1~4

VBAR

Full Scale

Input Terminal

Automatic1

1,1,0,1

0

220.00A / 2200.0A

IVSL/IVSH V.S. SGND

Automatic2

1,1,1,1

0

22.000A / 220.00A

IVSL/IVSH V.S. SGND

Manual1

1,1,0,0

X

22.000A

ADP V.S. SGND

Manual2

1,0,0,0

X

220.00A

ADP V.S. SGND

Manual3

1,0,1,0

X

2200.0A

ADP V.S. SGND

Manual4

1,0,0,1

X

22000A

ADP V.S. SGND

Note:

2. In DC current modes for clampmeter, ES51921 provides Zero function for offset removing.

3. The typical connection of input terminal for automatic1&2 is as the schematic below:

IVSL

IVSH

9R

R