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User's Manual
Voltage Selector Turnplate
UT8806E supports 100V~240V frequency of 50Hz, 60Hz, 400Hz industrial AC mains, please
confirm the AC power specification you are using, and dial the voltage turnplate according
to the label on the left side of the jack to select the correct voltage scale.
2：RS-232 Communication Port
RS-232 serial communication port of UT8806E is 9-pin male socket, which on the rear
panel. The pin definition is as follow.
3：RJ45 Internet Communication Port
The UT8806E is equipped with a RJ45 interface on the rear panel, which supports VXI-11
protocol. Through this interface, the multimeter can connect to the LAN for remote
control. For the specific settings, please refer to Chapter 2 Panel Operation-Auxiliary
System Functions-I/O Port Configuration.
4：USB-DEVICE Port
The UT8806E is equipped with a D-type USB 2.0 port on the rear panel, which supports
USB-TMC protocol for communication with a PC. Using the upper computer software to
control the multimeter.
5：GPIB Port
For the specific settings, please refer to Chapter 2 Panel Operation-Auxiliary System
Functions-I/O Port Configuration.
6：VMC Signal Output Port
The UT8806E outputs a pulse with a width of about 1μs and an amplitude of 5V from this
port every time it completes a sampling.
7：Ext TRIG Signal Input Port
The UT8806E supports external trigger switching, including the rising edge, falling edge
and level trigger.
8：Signal Input
There are 5 input terminal in total, arranged in the same order and the same electrical
parameters as the previous input terminal.
9：Lock Hole
Instruments.uni-trend.com
Pin2-----RXD
Pin3-----TXD
Pin5-----GND
UT8806E Desktop Digital Multimeter
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