Joy-it JT-UM25C, Manual

This menu displays the voltage measurement over time in the range of  

4 - 24 V, as well as the current measurement in the range of 0 - 5 A and  

automatically adjusts the displayed range in real time to account the  

voltage and current fluctuations.

Press    

and hold to switch D+ / D- graph. This interface  

displays the D+ / D- voltage measurement over time in the range of  

0 - 3.3 V and automatically adjusts the displayed range in real time to  

account the D+ / D- voltage fluctuations.

System settings

Time until automatic 

screen shutdown 

(default 1 minute)

Screen brightness  

(default level 4)

Display temperature 

(default Celsius)

Background color  

scheme (default 2, blue)

Foreground color  

scheme ( default 6, white)

Press and hold the button   

 to enter the setting mode, 

press     

again to navigate through the options. Then press   

to change a setting and press 

again to 

cycle through the setting options. At each setting state, press and hold    

to exit the system settings.

4. PC - SOFTWARE

1. Connection

First download the software installation file 

here

. 

Additionally, you need the font package 

Arial Unicode MS.ttf

,  

which you can download 

here

. Please install the font package first, before 

you continue with the installation of the software.

Now, install the software and follow the instructions there during the 

installation process.

After the installation process is completed, activate 

first of all the BT function on the UM25C measuring device with the 

BT switch. 

Then use the BT search in the settings of your computer to search for new 

BT devices. Add the 

UM25C

 device when it is found. If you are asked for a 

PIN during connection setup, please use the pin 

1234

 or 

0000

.