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 66MΩ range, the resolution is 0.1MΩ, if
SHIFT is floating or connected to DGND. It will be changed to 0.01MΩ, if DSHIFT is
pulled to V-.
Configuration
OR1
OR2
OR3
OR4
OR5
OR6
Full Scale Range
660.0Ω
6.600KΩ
66.00KΩ
660.0KΩ
6.600MΩ
66.00MΩ
Relative Resistor
OR1
VR5
VR4
VR3
‖
VR1
VR2
‖
VR1
VR1
Equivalent value
100Ω
1KΩ
10KΩ
100KΩ
1MΩ
10MΩ
1.3 Current measurement for multimeter
ES51967 has 2 automatic and 1 manual current measurement modes for multimeter.
The following table summarizes the full-scale range of each mode. When ES51967
operates 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.
1
2
VASEL
VBAR
Mode
FC1~4
Full Scale
Input Terminal
3
Automatic1
1,1,0,1
1
1
660.0µA / 6600µA
IVSL/IVSH V.S. SGND
3
Automatic2
1,1,1,1
1
1
66.00mA / 660.0mA IVSL/IVSH V.S. SGND
Manual
0,0,0,0
1
X
66.00A
IVSH V.S. SGND
Note:
1. Connect VASEL to V- will disable “A” and enable “V” units on LCD panel, so in other modes, this pin
must keep floating.
2. Connect VBAR to V- will disable the “µ
2
” / ”m
2
” symbol on LCD panel, so in the mV range of voltage
measurement, this pin must keep floating.
3. The typical connection of input terminal is as the schematic below:
Vin*
9R
R
100K
100K
IVSL
IVSH
*The
voltage results from the current flows through resistors R and 9R. Its input range is up to 3.3Vrms.
1.4 Current measurement for clampmeter
ES51967 has 2 automatic and 4 manual current measurement modes for Clampmeter.
The following table summarizes full-scale range of each mode. When ES51967
operates in automatic mode1&2, it takes high input from IVSH/IVSL (higher
range/lower range), low input from SGND and reference voltage from VR. When
ES51967 operates in the manual mode1~4, It takes high input from ADP, low input
from SGND and reference voltage from VA+ and VA-.
V2.6
9
10/09/27
CYRUSTEK [ Cyrustek corporation ]
