ES51932
22,000 Counts Auto DMM
1.1.5 Low-pass filter feature
ES51932 provides a 3-order low-pass filter to reduce the influence of high frequency
noise. This LPF feature is available in ACV or ACA modes. Set FC5 to low in these
modes, the KEY button is used to activate the LPF feature. Press KEY button for less
than 1 second to select the 3dB bandwidth of LPF sequentially (Full/10kHz/1kHz) and
the relative LCD segment on LCD panel will be active also. When peak mode is active,
the LPF mode will be disabled temporarily.
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 220.00MΩ, if SHIFT pin connects to V-,
the least digit will not be displayed and the other digits and decimal point will shift
right away. So the full scale becomes 220.0MΩ instead of 220.00MΩ.
Configuration
OR1
Full Scale Range
220.00Ω
Divider Ratio
Resister Connection
R6
R5
100Ω
1KΩ
OR2
2.2000KΩ
OR3
22.000KΩ
10KΩ
R1∥ R4
OR4
OR5
OR6
OR7
220.00KΩ
2.2000MΩ
22.000MΩ
220.00MΩ
100KΩ
1MΩ
10MΩ
10MΩ
R1∥ R3
R1∥ R2
R1
R1
1.3 Current measurement for multimeter
ES51932 has 2 automatic and 1 manual current measurement modes for multimeter.
The following table summarizes the full-scale range of each mode. When ES51932
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
VBAR
Full Scale
Input Terminal
Automatic1
Automatic2
Manual
1
1
X
220.00µA / 2200.0µA IVSL/IVSH V.S. SGND
22.000mA / 220.00mA IVSL/IVSH V.S. SGND
22.000A
IVSH V.S. SGND
Note:
1. The typical connection of input terminal is as the schematic below:
Vin*
9R
IVSL
IVSH
100K
100K
R
Ver. 1.2
8
10/05/27
CYRUSTEK [ Cyrustek corporation ]
