FNB38 manual (V1.
Tips: The FNB38 user manual (V1.2) is applicable to firmware V1.3 and above. Firmware version description 2019.12.24：v1.00 Original firmware. 2020.02.29：v1.10 Fix some known issues. 2020.03.20：v1.20 Fix restart issue when PD protocol is triggered. 2020.05.29：v1.30 1、Add the setting to close the startup screen; 2、Add the setting to turn off the CC pulldown; 3、Changed the judgment logic during fast charge identification; 4、In v1.
table of Contents 一、Overview.................................................................................................................................................... 4 二、Pay attention to safety matters.................................................................................................................4 三、Appearance structure diagram................................................................................................................4 四、Technical index........................
一、 Overview FNB38 USB tester is a high-reliability, high-security USB voltage and current detection meter and mobile communication terminal fast charge trigger. With a 1.44-inch TFT LCD display and integrated USB-A, Micro-USB, Type-C interfaces. Use an external 16-bit ADC, PD protocol physical chip. It can be used to measure the power supply or power consumption of products such as USB interfaces, mobile phone chargers, U disks, etc .
8.OK key, function key 9.HID-USB data transmission figure 1 四、 Technical index Accuracy: ± (a% (‰) reading + word count) index Range Resolution Accuracy Input voltage 4～24V 0.1mV ±(0.2‰+2) Input Current 0～5A 0.1mA ±(0.5‰+2) input power 0～120W 0.1mW ±(0.5‰+2) 0～9999.9Ω 0.1mΩ ±(0.5‰+2) 0～3.3V 0.01V ±(1.0%+2) ℃ 1℃ ±(1.2%+3) ℉ 1℉ ±(1.2%+4) capacity 0～99999mAh 0.0001mAh for reference energy used 0～9999.99Wh 0.00001Wh for reference Cable internal resistance 0～9999.9Ω 0.
五、 Function page operation instructions 1、 Close-up page (see Figure 2) Figure 2 description Only the three key parameters of voltage, current and power are displayed. → indicates the current direction. This page changes the display orientation. Instructions (1) << >> key Short press: Turn the page. (2) OK key Long press: Switch the screen display direction.
Run:XXX:XX:XX Represents the tester's startup time, without saving, restarts the timer after restart. Rec:XXX:XX:XX It indicates the valid time of the tester's recording capacity / power consumption. It is saved offline and will not be lost after power failure. Time It shows the voltage and current offline curve recording time.
(5) OK key Short press: When set to manual recording, recording can be paused / started, and it is invalid when set to automatic recording; Long press: Clear the current group record data, including capacity, power consumption, and record valid time. 3.Capacity / power consumption list (see Figure 4) Figure 4 description To facilitate the comparative analysis of multiple sets of capacity / power consumption data, you can switch to the capacity / power consumption list (Figure 4).
(2) Offline record curve page (as shown in Figure 8), click OK, pop-up clear confirmation window, you can clear the offline record curve separately. (3) Select Clear all Records in the settings to clear all records (5 sets of capacity / power consumption / recording time and voltage and current offline recording curves). (Enter the follow-up instructions of the setting method) 4.
Figure 6 Figure 7 Figure 8 description Figure 6 is the real-time curve of voltage and current. Figure 7 shows the data D + and D- real-time curves. Figure 8 shows the offline recording curve of voltage and current. Instructions (1) << >>key Short press: page turning; (2) Long press: Decrease / increase time base. (Only pages in Figures 6 and 7). (3) OK key Short press: screenshot curve; (Figures 6 and 7 are valid); The curve clear window pops up; (Figure 8 is valid); Long press: switch display curve.
FNB38 uses the voltage drop method to measure the internal resistance of the cable. It needs to be used with a constant current load. Instructions (1) << >>key (2) Short press: page turning; (3) OK key Short press: Record the reference value. Long press: switch display curve. Measurement steps (1) Connection method: charger + FNB38 + constant current load (current adjusted to about 1A), record the reference value.
number of PDOs may be small. Complete PDO please trigger with PD Time shall prevail. If this problem is solved, the firmware will be updated in the future.
7.3 QC3.0 trigger Select QC3.0, press OK shortly to enter the QC3.0 trigger page (as shown in Figure 13), Fail Failure will display Trigger Failure! Figure 13 Instructions (1) << >>key Short press: Decrease / increase QC3.0 trigger voltage. (2) OK key Long press: Exit the current page. (Still triggering). 7.4 Huawei FCP trigger Select Huawei FCP and press OK to enter the Huawei FCP trigger page (see Figure 14). If the entry fails, Trigger Failure! Will be displayed.
(2) OK key Long press: Exit the current page. (Still triggering). 7.5 Huawei SCP trigger Select Huawei SCP and press OK key to enter the Huawei SCP trigger page (as shown in Figure 15). Trigger Failure will display Trigger Failure! Figure 15 Instructions (1) << >>key Short press: Decrease / increase SCP trigger voltage. (2) OK key Long press: Exit the current page. (At the same time exit the SCP trigger state). 7.
the voltage will return to 5V) (2) OK key Long press: Exit the current page. (Still triggering). 7.7 PD protocol trigger (requires connection to Type-C interface) Select PD trigger, short press OK to enter the PD protocol trigger page (as shown in Figure 17). When entering, it will detect whether PD detects the CC pull-up. If not, return to the selection page. If there is a CC pull-up but no Caps are received, the voltage option will not be displayed. Figure 17 PD2.
7.8 PD protocol monitoring On the hardware, you need to use two CC lines, the connection method is: PD charger-CC line-FNB38-CC line-PD electrical appliances In order to avoid losing data, you can use the HID interface to provide power. When connecting, first connect the charger, FNB38 will automatically judge the communication CC line and switch to the corresponding interface to monitor. On the software, select PD monitor and short press OK button.
(3) >> key Only valid on the monitoring page 2 (Figure 19), short press: switch to view the detailed information of the message package; long press to hold to quickly browse down the information. (4) OK key Short press: You can switch between page 1 (Figure 18) and page 2 (Figure 19). Long press: exit the current page. 7.
7.10 PD protocol conversion This function can convert QC2.0 charging head to PD2.0 charging head for PD electrical appliances. When entering the page, the system detects whether the charging head supports QC2.0, if it does not support, it cannot enter. This function automatically finds power-using equipment and supports 2-60W broadcasting. You only need to change the power as needed. Be careful not to exceed the power of the charger to avoid unnecessary damage.
Send：Send Caps broadcast; Wait：Waiting for voltage request; Ready：The agreement is complete. 8.System information and setting page (see Figure 18) Figure 18 description Press and hold << to power on, FNB38 enters the system information and settings page. VX.X Indicates the current firmware version. SN:XXXXXX Indicates the unique serial number of the device. Run:XXXXXX Represents the number of device runs. Instructions (1) << >>key Short press: switch setting items.
<< >> key: short press: when the green dot is at the maximum grid (20Level, not explained later), change the parameter. Standby screen display brightness setting, the range is 0-20 level, when it is 0, the backlight is turned off. OK key: short press: switch green dot position. Where is the green dot, which corresponds to which operational block. Long press: Effective when the green dots are NO / YES. << >> key: short press: when the green dot is on the largest grid, change the parameter.
dot, which corresponds to which operational block. Long press: Effective when the green dots are NO / YES. << >> key: short press: when the green dot is on the largest grid, change the parameter. Recording time: curve recording time, no recording when NO, range is 0-9 hours, recording time interval is calculated automatically. (Such as one hour, one point every 10 seconds) OK key: short press: switch green dot position. Where is the green dot, which corresponds to which operational block.
Temperature display symbol: ° C / ° F. OK key: short press: switch green dot position. Where is the green dot, which corresponds to which operational block. Long press: Effective when the green dots are NO / YES. << >> key: short press: when the green dot is on the largest grid, change the parameter. System language: Chinese / English. OK key: short press: switch green dot position. Where is the green dot, which corresponds to which operational block. Long press: Effective when the green dots are NO / YES.
Turn on/off the startup page OK key：Short press: switch the green dot position. Where is the green dot, which corresponds to which operable block. Long press: Valid when the green dots are NO/YES. << >> key：Short press: change the parameter. Clear all records: including voltage and current curve, 5 sets of capacity/power consumption record value. OK key：Short press: switch the green dot position. Where is the green dot, which corresponds to which operable block.
2. When FNB38 is off, press and hold the OK key to access the HID-USB interface. Shows connected, device model, device firmware version. 3. Click OPEN and select Upgrade Firmware.
4.Click START to start upgrading the firmware. After the upgrade is completed, FNB38 will restart automatically.
Common problem analysis 1. Why can't the power reach the maximum power of the charger? 答：The PD protocol has a feature, if the current needs to exceed 3A. First: The charger needs to support protocols exceeding 3A; Second: The CC line connected to the charger needs to support a current of more than 3A. This CC line usually has an e-marker chip; Third: The mobile phone also needs to support the agreement.
3.Use the tester to trigger fast charge, it cannot be charged, nor can it be charged without the tester Answer: Many people use the tester to trigger the quick charge to charge the mobile phone. This is not recommended. It is easy to break the phone without knowing the performance of the phone. Moreover, if the mobile phone supports fast charging, the mobile phone itself will trigger fast charging, and there is no need for additional triggering by the tester.
CC pull-down, so the PD charger will not supply power. After the power is not supplied, the physical chip of the PD is pulled down by default, and it is powered again, and it does not supply power after it is turned on. . Therefore, connecting the PD charger to the TYPE-C interface for power supply will cause the tester to restart. Please use the USB port and the micro interface for power supply. 6.
8.Why does the fast charge protocol automatically detect and display all red? Answer: During the test, please do not connect the load. If possible, test several charging heads. If all the charging heads are all red, and confirm that these charging heads support fast charging (QC2.0/QC3.0/FCP/SCP/ Any protocol in AFC/PD), then it is suspected to be a PCB circuit problem, please check whether the D+D- part is short-circuited, soldered, etc.
