Fault symptoms and troubleshooting methods of the Rosemount 475 handheld transmitter

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　　The Rosemount 475 handheld communicator (field communicator), as the new standard for handheld devices, is now widely used by users in various industrial fields. It supports the HART communication protocol as well as the Fieldbus Foundation communication protocol, and features versatility, reliability, portability, intrinsically safety, and ease of upgrading. No matter how good a product is, it will develop some problems after being used for a long time; similarly, the Rosemount 475 handheld transmitter is also prone to various types of faults. Today, the technical editor from Shaanxi HuiBo Electromechanical will summarize for you the common troubleshooting issues that can arise with the Rosemount 475 handheld transmitter after long-term use, along with the methods to address them. 　　1. Method to shut down when it freezes 　 If the 475 freezes, it cannot be shut down using the normal shutdown method; in such cases, press Fn + the bulb key simultaneously for a few seconds to shut it down. Please do not remove the battery directly. 　　2. The touch pen cannot be used to operate the handheld device. If the touch pen fails to function with the 475, follow these steps to recalibrate the touchscreen:
a. Enter the 475 Main Menu;
b. Use the direction keys to select Settings, then press the Delete key to proceed to the next menu level ； 　　c. Use the direction keys to select Touch Screen Alignment, then press the Delete key to enter the re-calibration interface ； 　　d. A cross will appear in the center of the screen; use the touch pen to tap the location where the cross is. (The cross will appear in 5 locations: the center and the 4 corners.) e. Once this operation is completed, the touchscreen will return to normal. (If this situation occurs again in the future, please recalibrate following the steps above.) 3. Solutions for frequent crashes and errors when accessing the Hart or FF functions – Perform RE-FLASH or RE-IMAGE operations (try RE-FLASH first; if the problem persists, then try RE-IMAGE). If the 475 device experiences frequent crashes or errors when using the Hart Application, RE-FLASH or RE-IMAGE operations can resolve most of such issues. The specific steps are as follows: a. Enter the 475 Main Menu ； 　　b. Select to go to Settings ； 　　c. Select to go to About 475; 　　d. Select Re-Flash (or Re-Image). 　　e. Select Yes to confirm this operation, and make sure the charger is plugged in at this time; since the Re-Flash (or Re-Image) process is very power-intensive, it is essential to carry out this operation while the device is charged, otherwise it may lead to serious consequences that cannot be reversed. 　　f. If the handheld device is already confirmed to be charged, press OK to start Re-Flash (or Re-Image). Please be patient; the Re-Flash process takes about 20 minutes, while the Re-Image process takes around 50 minutes. 　　g. A prompt will appear on the screen after the operation is completed. Please follow the instructions. 　　4. Regarding the ATTENTION screen: For the 475 handheld device, if it does not shut down or start up properly – for example, due to a low battery or insufficient power – the following screen will appear:
Attention
The 475 did not boot up properly. Please select one of the following:
Retry – To restart the 475
Reflash – To reload the application software
Recover – To reload the operating system (Note: Select this option only under the guidance of the service center)
Retry/Reflash/Recover
If you encounter this situation, please note that it is not a fault. Simply click the Retry or Reflash button at the bottom left. Generally, try clicking Retry first; sometimes it is necessary to connect the device to a charger for about 20 minutes in order to refresh the software. 　　If the battery has insufficient power, clicking Retry or Reflash will cause repeated restarts. In this case, it is necessary to plug in the charger to charge the battery first, then click Retry or Reflash. Wait for a moment and follow the instructions on the screen. Please continue using it after the controller is fully charged; when the battery level is low, the above screen will appear upon turning it on.