Published: 2025-09-01 Article source:
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In this guide, we will explain how to use the Loss-in-Weight Dosing Mode of the GMC-X3 weighing controller. Loss-in-weight Dosing Mode refers to the selection of the analog control mode to control the flow rate and achieve the target flow rate value.
The GMC-X3 controller provides three working modes:
1. Constant Analog Output Mode
2. Loss-in-Weight Dosing Mode
3. External Setpoint Mode
In this section, we will focus on the operation and troubleshooting of Loss-in-weight Dosing Mode when the X3 is connected with a touch screen.
(Note: Before using this mode, please make sure weight calibration and flow calibration are completed.)
Step 1. Set Working Mode
On the main screen, log in as the Administrator, enter the password 000000, and tap Login. Tap Menu, go to System Parameters, then select Mode Setting. Tap the button next to Working Mode, and in the pop-up window, choose Loss-in-weight Mode. In general, using the default values of the parameters is fine. But if the following problems occur on site, refer to the below troubleshooting steps.
Step 2. Troubleshooting
1. Unstable Flow
On the main interface, click Menu → User Parameters → Flow Parameters. Adjust two parameters: Sampling Interval and Sampling Quantity. The larger the sampling interval, the fewer weight samples are collected, resulting in more stable flow. The smaller the sampling quantity, the fewer weight samples are collected, resulting in more stable flow.
(The larger the sampling interval, the fewer weight samples; The smaller the sampling quantity, the fewer weight samples; Resulting in more stable flow.)
2. Adjustment of Real-Time Analog Output is Slower
First, confirm the current analog control mode: on the main interface, click Menu → System Parameters → Mode Setting. In the mode setting interface. Click the box on the right side of the analog control mode, and select either PID Control or Proportional Control.
2.1. If the control mode is PID Control:
Go to Menu → User Parameters → PID. In the PID interface, reduce the values of Fine PID Control Period and Coarse PID Control Period. The smaller these cycle times are, the faster the adjustment of real-time analog output is.
(The smaller the Fine PID Control Period and Coarse PID Control Period, the faster the adjustment of real-time analog output.)
2.2. If the control mode is Proportional Control:
Go to Menu → User Parameters → Proportional Control. In the proportional control interface, reduce the value of Single Analog Adjustment Time. The smaller it is, the faster the adjustment of real-time analog output is.
(The smaller the value of Single Analog Adjustment Time is, the faster the adjustment of real-time analog output is.)
This concludes the troubleshooting of Loss-in-weight mode. If you'd like to learn more details about this instrument, feel free to contact General Measure. In the next session, we will demonstrate the External Setpoint Mode of the GMC-X3.