ES51925
3000 Counts Smart DMM
Functional Description
1. Operation Modes
1.1 Voltage Measurement
A re-configurable voltage divider automatically provides a suitable range in
voltage measurement mode. The following table summarizes the full-scale ranges
in each configuration.
Configuration
VR1
Full Scale Range
300.0mV*
3.000V**
30.00V
Divider Ratio
1
Resister Connection
VR1 (10MΩ)
VR2 (1.111MΩ)
VR3 (101KΩ)
VR4 (10KΩ)
VR2
VR3
VR4
VR5
1/10
1/100
1/1000
1/10000
300.0V
1000V***
VR5 (1KΩ)
Note:
* Exists in manual mode only by RANGE key control
**This range is the default range for auto range & auto scan mode
*** Depends on CESEL selection
1.1.1 OL selection
ES51925 has a OL display selection feature archived by configuring a CESEL
pin. If pin CESEL is connected to V-, ES51925 will have a 600.0V overflow
level in DCV and ACV mode. If pin CESEL is connected to DGND, the
ES51925 will have a 1010V overflow level in DCV mode and have a 1010V
overflow level in ACV mode also. When CE is floating, a 1500V overflow level
in DCV mode but ACV is still 1010V overflow level. The meter will Show OL
when the measuring signal reaches the overflow level with beeper warning. The
configuration of CESEL is listed below.
CESEL
V-
DGND
Floating
DCV
600.0V
1010V
1500V
ACV
600.0V
1010V
1010V
Ver 2.9
6
10/06/25
CYRUSTEK [ Cyrustek corporation ]
