KM-F Series Coulomb Meter

Introduction

This quick start guide introduces the essential knowledge and basic operations for the KM-F Series Coulomb Meter (Shunt Sampling). For detailed instructions, please refer to the "User Manual" (electronic version). Product images in this guide are for reference only; the actual product may differ.

User Manual (electronic version): http://68.168.132.244/km/manual_en_zx.pdf

APP (Android Download): http://68.168.132.244/JunceHome/JunceHome.apk

APP (iOS Download): Search for "Junce Home" in the Apple App Store.

Appearance Introduction

1. Panel Description

The KM-F Series Coulomb Meter features a display screen and several control buttons.

Figure 1-1-1: KM-F Series Display Diagram Description: The diagram shows the front panel of the coulometer with a screen displaying "Coulometer", date and time, voltage (024.00V), current (001.00A), power (024.00W), charge status (CHG), remaining capacity percentage (50%), estimated time (010h:00m), and total capacity (10.000Ah). Control buttons [SET], [OK], [Up Arrow], and [Down Arrow] are also visible.

Sampler Diagrams

The sampler is the component that connects to the battery and load.

Example: 50A Sampler

Figure 1-1-2: KM-F Series Sampler Diagram (Example: 50A Sampler) Description: This diagram shows the 50A sampler unit. It highlights the connection points: "B-" for battery negative, "P-" for charger/load negative, and "V+" for positive terminal. A data cable interface is also shown.

Example: 100A Sampler

Figure 1-1-3: KM-F Series Sampler Diagram (Example: 100A Sampler) Description: This diagram shows the 100A sampler unit. It highlights connection points: "BATT-" for battery negative, "LOAD-" for charger/load negative, and "V+" for positive terminal. A data cable interface is also shown.

Display Interface Description

The coulometer's display shows various real-time parameters.

Figure 1-2-1: KM-F Series Display Interface Diagram Description: The diagram illustrates the coulometer's main display, showing the "Coulometer" title, actual time, and various readings including Voltage, Current, Power, Estimated Time, and Remaining Capacity. It also indicates connection statuses (WiFi, Bluetooth) and charge/discharge status.

APP Interface Description

The mobile application provides remote monitoring and control.

Figure 1-3-1: KM-F Series APP Interface Diagram Description: The diagram shows the mobile app interface, displaying the instrument model, connection status, battery level (50%), voltage, current, power, estimated time, and capacity. It also shows icons for settings, connection, and charge/discharge status.

Basic Instrument Operations

1. Main Interface Settings

In the main interface:

• Press and hold the [OK] button for 5 seconds to lock the buttons. Press and hold again for 5 seconds to unlock.
• In remote connection mode, press and hold the [SET] button for 10 seconds to enter firmware upgrade mode.
• Short press the [OK] button to view the coulometer's information and access the QR code for connecting with the mobile app.

2. System Settings

Users can access system settings by short-pressing the [SET] button from the main interface. Use the [Up Arrow] and [Down Arrow] buttons to navigate options. Short-press [OK] to select or confirm.

(1) Language & Time Zone

Navigate to "Language & Time zone" using the [Up Arrow] and [Down Arrow] buttons. Short-press [OK] to enter the language selection. Select "Chinese" or "English" using the navigation buttons and confirm with [OK]. The system then proceeds to time zone selection. Select a time zone and confirm with [OK] to save changes.

(2) Network Reset

In system settings, navigate to "Network reset" and short-press [OK]. A confirmation dialog will appear. Select "Yes" or "No" using the navigation buttons and confirm with [OK]. Resetting the network requires reconfiguring the connection in the JUNCE HOME mobile app.

(3) System Reboot

Navigate to "System reboot" in system settings and short-press [OK] to restart the device.

(4) Battery Level

Navigate to "Battery level" and short-press [OK]. Adjust the tens and units digits for the battery level (0-100%) using the [Up Arrow] and [Down Arrow] buttons, confirming each digit with [OK]. For first-time use, it is recommended to set the battery level to 100% after fully charging.

(5) Battery Capacity

Navigate to "Battery capacity" and short-press [OK]. Adjust the battery capacity value (0.1-9999.9 Ah) digit by digit using the [Up Arrow], [Down Arrow], and [OK] buttons. For first-time use, set according to the battery's nominal capacity, or after full charge and discharge, set the released capacity as the actual battery capacity.

(6) Alarm

Navigate to "Alarm" and short-press [OK]. Adjust the low capacity alarm threshold (01%-99%) and low voltage alarm threshold (10.0V-99.9V) using the [Up Arrow] and [Down Arrow] buttons. Set to "OFF" to disable an alarm. Confirm settings with [OK].

When battery voltage or capacity falls below thresholds, an alarm window appears with a continuous buzzer for 10 seconds. Press [OK] to acknowledge. If the condition persists, the alarm reactivates. Low voltage alarms may not dismiss if voltage remains low during charging, while low capacity alarms dismiss in charging state.

(7) Color Scheme

Navigate to "Color scheme" and short-press [OK]. Select "Light" or "Dark" using the [Up Arrow] and [Down Arrow] buttons. Press [OK] to apply the selected scheme.

(8) Display

Navigate to "Display" and short-press [OK]. Adjust "Brightness" (01%-100%) using the [Up Arrow] and [Down Arrow] buttons. Press [OK] to confirm brightness and proceed to "Auto Screen Off" settings. Select screen-off time (OFF, 10s-60s) or "Auto" mode. "Auto" mode adjusts brightness based on discharge current (e.g., 15mA threshold for KM105F, 30mA for others).

(9) Password

Navigate to "Password" and short-press [OK]. Adjust the password digits using the [Up Arrow], [Down Arrow], and [OK] buttons. The initial password is 11223344. Changing the password is required for the device-sharing feature in the mobile app.

(10) Factory Reset

Navigate to "Factory reset" and short-press [OK]. Select "Yes" or "No" using the navigation buttons and confirm with [OK]. A factory reset restores all settings to default, requiring reconfiguration.

Wiring Method

KM105F Wiring Steps:

1. Use a negative wire to connect the battery's negative terminal to the screw marked "B-" on the sampler.
2. Use a negative wire to connect both the charger's negative terminal and the load's negative terminal to the screw marked "P-" on the sampler.
3. Use a positive wire to connect the battery's positive terminal to the small screw marked "V+" on the sampler.

KM110F, KM140F, KM160F Wiring Steps:

1. Use a negative wire to connect the battery's negative terminal to the screw marked "BATT-" on the sampler.
2. Use a negative wire to connect both the charger's negative terminal and the load's negative terminal to the screw marked "LOAD-" on the sampler.
3. Use a positive wire to connect the battery's positive terminal to the small screw marked "V+" on the sampler.

Precautions:

• The wire from the battery positive to the sampler's "V+" should be 13-16AWG.
• Ensure negative wires are connected correctly to B-, P- (BATT-, LOAD-) terminals to avoid reversed charging/discharging directions.
• Copper terminals are recommended for secure connections.
• The wire diameter from the battery negative to the sampler's negative must be equal to or greater than the total diameter of all load wires.
• Wiring must be done in a power-off state. Ensure the battery's positive connection is disconnected to prevent electric shock.
• Connect the sampler section first, then the battery's positive terminal.

Display Interface After Wiring Completion: During charging, the current direction symbol is green "+" and the remaining capacity increases. During discharging, the symbol is sky blue "-" and the remaining capacity decreases.

Figure 2-3-1: 50A Sampler Wiring Diagram Description: Illustrates the connection of battery, charger, and load to the 50A sampler. Shows positive and negative terminals for each component and the sampler.

Figure 2-3-2: 100A/400A/600A Sampler Wiring Diagram Description: Illustrates the connection of battery, charger, and load to the 100A sampler (shown with 400A rating). Shows positive and negative terminals for each component and the sampler.

Getting Started with the Mobile App

1. App Download

Android: Download the app from http://68.168.132.244/JunceHome/JunceHome.apk. For installation and operation videos, scan the provided QR code (not included in text). Contact customer service if download issues occur.

iOS: Search for "Junce Home" in the Apple App Store.

2. Mobile App Installation and Device Connection

The software supports Android 9.0+ and iOS 9.0+. It requires location access and Bluetooth permissions. For Android, enable GPS location services to search and connect to Bluetooth devices. The app does not track location.

3. Software Update

The app automatically checks for updates upon startup. A popup will notify you if a new version is available.

4. App Interface Display

Main Interface: Displays instrument model, connection status, battery level, voltage, current, power, estimated time, and capacity.

Settings Interface: Allows adjustment of battery full capacity, current battery level, brightness, color scheme, auto screen off, low capacity/voltage reminders, and device key lock.

Interface English Names and Abbreviations