1.2 Resistance Measurement
A re-configurable 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. In 110.0MΩ, the maximum counting number
is 1100 counts and the resolution is 0.1MΩ. So the full scale becomes 110.0MΩ.
Configuration
OR1
Full Scale Range
110.00Ω
Divider Ratio
Resister Connection
R6
R5
100Ω
1KΩ
OR2
1.1000KΩ
OR3
OR4
11.000KΩ
110.00KΩ
R4
R1‖ R3
10KΩ
100KΩ
OR5
1.1000MΩ
1MΩ
R1‖ R2
R1
OR6
OR7
11.000MΩ
110.0MΩ
10MΩ
10MΩ
R1
1.3 Current measurement
ES51916 has 2 automatic and 1 manual current measurement modes for multimeter and
5 manual current measurement modes for clampmeter. The following table summarizes
the full-scale range of each mode. When ES51916 operate in the current measurement
modes for multimeter, It takes high input from pin IVSH or IVSL, low input from pin
SGND and reference voltage from pin VR. When ES51916 operate in the current
measurement modes for Clampmeter, It takes high input from pin ADP, low input from
pin SGND and reference voltage from pins VA+ and VA-. The test circuits are shown in
page 27-28.
Mode
Range Selection
Full Scale
110.00µA / 1100.0µA
11.000mA / 110.00mA
11.000A
Designed for
Multimeter
Multimeter
Multimeter
Automatic Mode 1
Automatic Mode 2
Manual Mode 1
µA
mA
A
Manual Mode 2
Manual Mode 3
Manual Mode 4
Manual Mode 5
Manual Mode 6
A
A
A
A
A
1.1000A
11.000A
110.00A
1100.0A
11000A
Clampmeter
Clampmeter
Clampmeter
Clampmeter
Clampmeter
Note:
1. In Manual DC current measurement modes for clampmeter, ES51916 provides Zero function for offset
removing.
2. In Automatic mode1 and Automatic mode2, the pin VBAR is used to control the display of “µ” and
“m” sign on the LCD panel. If pin VBAR is floating or connected to DGND, the “µ” and “m” sign will
be displayed. If pin VBAR is connected to V-, the “µ” and “m” sign will not be displayed.
v1.2
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11/09/06
CYRUSTEK [ Cyrustek corporation ]
