Process Equipment Maintenance Series (Part II)

The previous article describes how to perform weighing verification, this article will describe how to perform calibration.

calibration usually includes: zero calibration and full-scale calibration.Before calibration, it is recommended to contact the weighing system supplier, prepare the corresponding software and hardware, and understand the function of the transmitter button. Some equipment manufacturers will set the transmitter management password to prevent misoperation. It is necessary to know the transmitter management password in advance.

Keep the tank empty, install the components of the tank, such as motor, inlet and outlet hose, jacket pressure hose, to obtain the appropriate zero value, enter the calibration zero point in the transmitter calibration menu for calibration. Examples of several transmitters are as follows:

IND131/331/360 series can enter the setting mode by pressing the print key for a long time, and flip the menu to find "Calibration"-"Set Zero". at this time, the transmitter will prompt "Empty Scale". after pressing confirm, the zero calibration will display "Capture Zero OK" for success and "Capture Zero Failed" for failure. if the zero calibration fails, the weighing system will shake, and multiple failures are likely to cause faults of weighing components.

ACT350 supports network communication. The transmitter can be connected to the computer through the network cable. The IP address of the computer is set to the same network segment as the transmitter, such as 192.168.0.3. Enter the transmitter address in the browser, such as 192.168.0.2 (default). After entering, select "Calibration Setting"-"Set Zero" for zero calibration.

& rarr; Official software eNodView need to be installed, which can be downloaded from its official website. The computer connects the transmitter through USB type A- B. After successful communication, it enters "Calibration"-"Zero Adjustment":

Note: The full scale value of the weighing system is generally 110-120% of the tank volume. The full-scale calibration can use one of three methods:

I. Directly calibrate the weight, perform similar operations as described in the above zero calibration, enter the corresponding menu, select "Calibration-", "Set Span" or "Span Adjustment", put the weight or reference object, enter the reference value or slope value in the transmitter or computer calibration interface, and then the weighing system will calculate and save the calibration result after confirmation.

ii. weight step-by-step substitution method, when the jar is too large to be filled with the weight, the weight step-by-step substitution method can also be used. repeat the following steps:

iii. Calibration-free method: The factory calibration certificate or label of each weighing sensor contains its factory calibration signal value. Calculate the average value of the signal values of all sensors and input them into the transmitter to directly complete the calibration.

re-verification: the same as verification, please refer to "4 verification" in the previous article ".

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