ES51967
6,600 Counts Auto DMM
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
Full Scale Range
660.0Ω
Relative Resistor
OR1
Equivalent value
100Ω
OR2
6.600KΩ
VR5
1KΩ
OR3
66.00KΩ
VR4
10KΩ
OR4
660.0KΩ
100KΩ
VR3∥VR1
OR5
OR6
6.600MΩ
66.00MΩ
1MΩ
10MΩ
VR2∥VR1
VR1
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.
Mode
FC1~4
1,1,0,1
1,1,1,1
0,0,0,0
1VASEL 2VBAR
Full Scale
Input Terminal
Automatic1
Automatic2
Manual
1
1
1
1
1
X
660.0µA / 6600µA 3IVSL/IVSH V.S. SGND
66.00mA / 660.0mA 3IVSL/IVSH V.S. SGND
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 “µ2” / ”m2” 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
IVSL
IVSH
100K
100K
R
*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
08/10/06
CYRUSTEK [ Cyrustek corporation ]
