Brand Name: RD
DIY Supplies: ELECTRICAL
Operating Temperature: -10--100
Accuracy Class: no
Display Type: Digital Only
Power Supply: DC
Model Number: UM25/UM25C
Voltage measurement range: 4-24.000V
Current measurement range: 0-5.0000A
Voltage measurement resolution: 0.001V
Current measurement resolution: 0.0001A
Product weight: 23.74g
Time measurement range: 0-99h59min59s
Screen brightness setting: 0-5 level
Delay closing screen time: 0-9 mins
Display screen: 1.44 Inch color LCD display
Update rate: 2Hz
Display screen:1.44 Inch color LCD display
Voltage measurement range:4-24.000V
Voltage measurement resolution:0.001V
Current measurement range:0-5.0000A
Current measurement resolution:0.0001A
Capacity accumulation range:0-99999mAh
Voltage measurement accuracy:±（0.5‰+2digits）
Energy accumulation range:0-99999mWh
Current measurement accuracy:±（1‰ +4 digits）
Load impedance range:0.8Ω-9999.9Ω
Time measurement range:0-99h59min59s
Temperature measurement error:±3℃/±6℉
Screen brightness setting:0-5 levels
Auto screen off time:0-9mins
Voltage graphing range:0-24.00V
Current graphing range:-5.0000A
Product weight:23.74g(UM25C)/19.26g (UM25)(No packaging)；54.56g(UM25C)/50.08g (UM25)( With packaging)
Quick charge recognition mode:QC2.0、QC3.0、APPLE 2.4A/2.1A/ 1A/0.5A、Android DCP、SAMSUNG
User manual, PC software installation instruction and PC software and Android APP download link:
use the meter in the correct way, USB2.0 support Huawei quick charge. there is type-c in and type-c ouput port, it can measure type-c cable , support type-c charge , but not tuype-c charger identify resistance , no trigger function. When you use USB-C in , you must use USB-C out, and if you want want fast charge by type-c port , you must use PD charger too, if you just connect USB-C in to the PD charger, the meter will not light, you need to connect a load which also supports PD charging, the meter will light
For Android and IOS APP :
A: APP only support android 8.0 and above; IOS 8 and above .
B: Allow APP to do in the background, not be cleaned.
C: Allow APP self-starting.
D: Allow APP stay after screen locked, not be cleaned.
E: For desktop, when you use the bluetooth adapter to make bluetooth connection, Please don’t use the adapter own driver, and use the windows system bluetooth driver, otherwise the module can’t make SSP series port communication. If you have installed the adaptor driver, you can uninstall it and unplug the adaptor, then plug in again, the system will install it automatically.
3, Actual Test Video
B: cable resistance measurement video : https://www.youtube.com/watch?v=-kNJVNPbGvc
1. Q:What is the differences between UM25 and UM25C?
A: UM25 is no communication version, UM25C is conmmunication version by Bluetooth connection
1. Q: what is the software crash problem?
USB 2.0 Full-Color LCD Display Tester
APP test and other function introduction :APP test and other function introduction :
1:Measurement Main Interface
2:Quick Charge Recognition Interface
3:Charging Recording Interface
4:Data Connection Cable Impedance Measurement Interface
5:Measurement Graphing Interface
6:Ststem Parameter Setting Interface
The Core Function:
PC Bluetooth Communication
Android Phone APP Control
Quick Charge Recognition
Data Record and Store
Differential Voltage Method Measurement Data Connection Cable Impedance
Load connecting detection function (screen auto off, plug the load, screen auto lighting)
Interface Prompt Repre
1:Press and hold the key to rotate the Screen Left
Interface 2: Quick Charge Recognition Interface
Press ‘NEXT’ to switch to the Charging Recording Interface.
Interface 3: Charging Recording Interface
Interface 4: Data Connection Cable Impedance Measurement Interface.
Interface 5: Measurement Graphing Interface
This interface displays the voltage measurement over time in the 4-24V range and will automatically adjust the displayed range in real time to account for voltage fluctuations. And the current measurement over time in the 0-5.000A range and will automatically adjust the display range in real time to account for current fluctuations.
Interface 6: System Parameter Setting Interface
The PC Control Software Installation Instruction
Note: This product only supports Windows 7 and above.
1 Unzip the installation package
2 Click setup to install
3 Bluetooth connection
3.1 open the bluetooth switch on the UM25C.
3.2 Use the compute to search bluetooth device.
3.3 View bluetooth setting
Select the device connected with bluetooth, view the bluetooth series port COM what PC was using. Efferent direction COM (UM25C’Port’) is bluetooth connection port. (note: at win7 system, select bluetooth device, right-click to view properties, display the following widows, view COM port of bluetooth setting, select efferent direction series port to connect. At win10 system, select bluetooth device, click “more bluetooth option”, view COM port of bluetooth setting, select efferent direction series port to connect.)
3.4 Connect bluetooth:
3.5 When the Bluetooth indicator changes from blinking to static, click “Connect”
4. Function Introduction
4.1 Program interface overview:
1: Basic functions: Previous page, Next pages, Rotate screen,
2: Corresponding data group: data group switch (click the corresponding number to switch directly into this data group ), data group data clear
3: Corresponding the main display interface 1: main measurement interface
4: Corresponding the main display interface 3: Data recording interface
5: Corresponding the main display interface 2: Quick Charge Recognition interface
6: Corresponding the main display interface 6: temperature unite switch, dual format temperature display
7: Corresponding the main display interface 6: screen brightness, auto screen off time.
8: Corresponding the main display interface 5: Voltage-Current Graphing Interface.
4.2 Graphing and Data Export:
Move mouse over the Voltage / Time measurement graph then right-click and select the following options:
4.2.1: Automatically adjust the X axis:
4.2.2: Export data to the clipboard:
Format : Reference point number on X Axis, Voltage value at that reference point.
Read times - Voltage graph Voltage(V) - Voltage graph Read times - Current graph Current(A) - Current graph
0 23.998 0 0.0002
1 23.998 1 0.0002
2 23.998 2 0.0001
3 23.998 3 0.0001
4 23.998 4 0.0002
5 23.998 5 0.0002
6 23.998 6 0.0021
7 23.998 7 0.0021
8 23.998 8 0.0018
9 24.084 9 0.0018
4.2.3: Export data to Excel:
Export data to Excel. If you want export all data, remember to click auto scale X. otherwise only the current record data group is exported. Please note, the exported data is only for Microsoft Office Excel.
4.2.4: Export simplified images:
4.2.5: Clear chart:
1. for desktop, when you use the bluetooth adapter to make bluetooth connection, Please don’t use the adapter own driver, and use the windows system bluetooth driver, otherwise the module can’t make SSP series port communication. If you have installed the adaptor driver, you can uninstall it and unplug the adaptor, then plug in again, the system will install it automatically.
2. after power off, when power on again, you need to select the COM port again. When the bluetooth indicator is lighting, you can connect the PC with module
3, please use windows official version, simple version may lose some part.
4, when communicating, don’t press the button on tester, otherwise there will be some error data
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