ES51985
6000 Count AUTO DMM
Note
:
1.Full Scale
Function Description
1. Operating Modes
1.1 Voltage Measurement
A reconfigurable voltage divider automatically provides a suitable range in voltage
measurement mode. The following table summarizes the full scale ranges in each
configuration.
Configuration
VR1
VR2
VR3
VR3
VR5
Full Scale Range
600.0mV
6.000V
60.00V
600.0V
6000V
Divider Ratio
1
1/10
1/100
1/1000
1/10000
Resister Connection
-
R2 / (R1+R2)
R3 / (R1+R3)
R4 / (R1+R4)
R5 / (R1+R5)
1.
2.
600.0mV range only exists in manual mode.
In the 6000V range, if the digit number is larger than 1000V, LCD will display
“OL”.
The measurement of true RMS using ES636
If ES636 (or other true RMS-to-DC converter chip) is used for true RMS measurement,
the suggested application circuit is shown below. When ES636 is used for true RMS,
ADO and ADI pin short together, TEST5 pin keeps floating, and ACVL pin connects to
SGND. And OVSG pin shorts to AGND through a switch.
100
1K
10K
101K
1.111M
OVSG
OR1
VR5
VR4
VR3
VR2
TEST5
ACVL
ACVH
ACV
2.2u
+
1
2
3
4
5
6
7
+Vs
14
13
12
11
10 150
9
8
10K +Vs
500K
2.2u
+
-Vs
ES51985
ES636
4.7u
-Vs
ADI
ADO
AGND
22k
1k
6
07/01/02
CYRUSTEK [ Cyrustek corporation ]
