ES235 Datasheet, PDF (8/37 Pages) Cyrustek corporation – 4000 Counts DMM / Peak

ES235
4000 Counts DMM / Peak
1.2. Voltage Measurement
A re-configurable voltage divider automatically provides a suitable range in voltage measurement
mode. 400.0mV range is independent and manual mode. It takes input signal from mVin pin. The
following table summarizes the Full-Scale ranges in each configuration.
Configuration
VR1
VR2
VR3
VR4
VR5
Full Scale Range
400.0mV
4.000V
40.00V
400.0V
1000V
Divider Ratio
1
1/10
1/100
1/1000
1/10000
Resister Connection
-
VR2 (1.111MΩ)
VR3 (101KΩ)
VR4 (10KΩ)
VR5 (1KΩ)
Input Pin
mVin V.S. SGND
VR1 V.S. SGND
VR1 V.S. SGND
VR1 V.S. SGND
VR1 V.S. SGND
The VST pin is used to control the voltage start range from 4.000V or 400.0V, refer to the table.
Initial state
V+
400.0V
VST
DGND Floating
4.000V 400.0V
V-
4.000V
The ES235 provide two types of the hazardous live voltage warning by different condition.
DCV
ACV
PEAK
SEL2
V+
DGND Floating
V-
35V
70V
16V
33V
22.6V
46.7V
When the voltage measured exceeds the level defined, the buzzer generates 2KHz beep and
ALARM (pin 57) drive high output (V+ level) periodically. It can remind the user to notice the
hazardous voltage. The buzzer sound warning could be cancelled by DIS (pin94).
Buzzer
DIS
V+
DGND Floating
V-
Disable
Enable
V 2.2
8
2015/12/15