V 1.2

10

2016/04/27

ES251

2000 Counts DMM

1.3.

Current Measurement For Multi-meter

ES251 has 3 automatic current measurement modes for multi-meter. The following table

summarizes the full-scale range of each mode. When ES251 operates in the current measurement

modes for multi-meter, it takes high input from pin IVS, low input from pin SGND and reference

voltage from calibration scheme.

Mode

FC1~4

Full Scale

Input Terminal

CAL

Automatic1

1,1,0,1

200.0µA / 2000µA

IVS V.S. SGND

AC 200uA

3

Automatic2

1,1,1,1

20.00mA / 200.0mA

IVS V.S. SGND

AC 20mA

3

Automatic3

0,0,0,0

2.000A /20.00A

2

IVS V.S. SGND

Yes

Note:

2. Connect ASEL (pin43) to V- will set maximum readings of input for Automatic3 mode to 10.00A.

3. DCuA/DCmA use the same configuration as DCV mode. AC higher range use the same configuration as ACV mode.

1.4.

Current Measurement For Clamp-meter

ES251 has 2 automatic and 4 manual current measurement modes for Clampmeter. The following

table summarizes the Full-Scale range of each mode. When ES251 operate in the automatic modes

and the manual mode1~4, it takes high input from IVS pin, low input from SGND and reference

voltage from VR_CLAMP.

Mode

FC1~4

Range

Max full scale

Input Terminal

CAL

Automatic1

1,1,0,1

0

200.0A / 2000A

2

20/200 mV

IVS V.S. SGND

Yes

4

Automatic2

1,1,1,1

0

20.00A / 999.9A

20/1000 mV

IVS V.S. SGND

Yes

4

Manual1

1,1,0,0

X

2.000A

600 mV

IVS V.S. SGND

Yes

Manual2

1,0,0,0

X

20.00A

600 mV

IVS V.S. SGND

Yes

Manual3

1,0,1,0

X

200.0A

600 mV

IVS V.S. SGND

Yes

Manual4

1,0,0,1

X

1000A or 2000A

2

100 or 200 mV

IVS V.S. SGND

Yes

Note:

2. Connect ASEL to V- will set maximum of input for Automatic1 & Manual4 modes to 1000A.

3. In DC current modes for clamp-meter, ES251 provides Zero Function (pin70) for offset removing.

4. AC Lower range calibration use the same configuration as Manual3 ACA mode. AC Higher range calibration use the

same configuration as Manual4 ACA mode.