11/01/05

13

ES51981

3 1/2 AUTO DMM

4.1 FUNCTUON

This packet indicates the measurement mode of the meter. The following table

summarizes the transmitted code for each mode. Note that the encoding of this packet is

different from the encoding of FC1-FC4 switch.

Code

Measurement Mode

0111011

Voltage

0111101

µA Current

0111111

mA Current

0110000

Auto A current

0111001

Manual A Current

0110011

Ω

0110101

Continuity

0110001

Diode

0110100

1*Temperature

0111110

ADP0

0111100

ADP1

0111000

ADP2

0111010

ADP3

Note: 1*.The judge bit in the Status packet determines whether the unit is Celcius or

Fahrenheit.

4.2 RANGE

This packet indicates the full scale range of the meter. When the meter operates in

continuity mode, diode mode, or current (A) mode, this packet is always 0110000 since

the full scale range in these modes are fixed. The following table lists the code for each

range in each measurement mode.

Code

V

mA

µA

Auto A

Ω

0110000

2.000V

20.00mA

200.0µA

2.000 A

200.0Ω

0110001

20.00V

200.0mA

2000µA

20.00 A

2.000KΩ

0110010

200.0V

20.00KΩ

0110011

2000V

200.0KΩ

0110100

200.0mV

2.000MΩ

0110101

20.00MΩ

0110110

4.3 DIGIT 3 – DIGIT 0

Digit 3 is the most significant digit on the LCD panel, and digit 0 is the least significant

digit. When the LCD panel shows OL, the serial port outputs 2000.