Cologne flowmeter from Germany

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Can the Cologne flowmeter be changed from 4-20mA to 5-20mA?

The 4-20mA output of the Cologne flowmeter can be changed to 5-20mA, but this is a modification of the range and usually requires the use of the flowmeters own configuration software or flushing controller to complete, which cannot be achieved through external simple wiring.. 1. Modifying feasibility is essentially changing the correspondence between the flow measurement range and the output current. For example, changing the output corresponding to 0 flow from 4mA to 5mA, and maintaining the output corresponding to full range flow at 20mA. This needs to be achieved through device configuration. • Use HART controller: If the flowmeter supports the HART protocol, it can be connected using a universal or branded controller, enter the "Analog Output Settings" menu, and modify the output lower limit value. • Parameter modification path: In the device configuration menu, usually find options such as "Analog Output", "Output Setting", or "Signal Condition" to change the Lower Range Value (LRV) from 4mA to 5mA

3. Important precautions • Device compatibility: First, confirm whether your Cologne flowmeter model (such as OPTIFLUX, Waterflux, etc.) supports software configuration for output signal types. The vast majority of intelligent electromagnetic and ultrasonic flow meters support it, but older or simplified models may not be supported. System compatibility: After modification, the range of downstream receiving devices (such as PLC, DCS, display instruments) must also be synchronously modified to 5-20mA corresponding to the flow rate, otherwise it will cause flow display and control errors. • Zero point cutoff function: Flow meters usually have

4. Alternative solution: If the flowmeter itself cannot be modified, an external signal converter/isolator can be added to convert 4-20mA input to 5-20mA output. This is a hardware solution that does not require the use of the flow meter itself.

2. Is the Krohne 7300 ultrasonic flowmeter from Cologne, Germany easy to use? The Krohne OPTISONIC 7300 ultrasonic flowmeter from Cologne, Germany performs well in natural gas, process gas, and utility gas applications, especially suitable for standard volume flowmeters. This device is not affected by the characteristics of the medium, does not require maintenance, has no pressure loss, and has a large dynamic range. Its flange connection covers a wide range, from DN50 to 1000, and also has 2 to 40 "options. The maximum pressure can reach PN450/ASME Cl 2500, or welding connection can be used. Equipment equipped with 3 channels of 4... 20mA, HART, Modbus, FF ® Interface to meet various communication needs. As a universal 2-channel code ear front diameter ultrasonic gas flowmeter, the OPTISONIC 7300 is suitable for process and utility gas measurement in oil and gas refineries, chemical or petrochemical industries, as well as for non metering natural gas applications or various applications of compressed air, mixed or flue gas (up to+180 ° C/+356 ° F). The device adopts the principle of transmission time difference measurem

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