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1. Should the ultrasonic flowmeter in the fire pump room be wired? The handheld ultrasonic flowmeter used in the fire pump room does not require wiring. It adopts an external clamp installation, with the probe directly attached to the outer wall of the pipeline, powered by batteries, and can measure flow by inputting parameters such as pipe diameter and material when turned on. The entire process does not require pipe breakage, continuous water supply, or power cord connection. Fixed ultrasonic flow meters (such as pipe section or flange type) require wiring, including power lines, 4-20mA signal lines, or RS485 communication lines, for long-term online monitoring and data remote transmission. However, these devices are mostly used for new construction or renovation projects and are not for inspection scenarios. According to the spot parameters of Shanghai Fire Ultrasonic Flow Meter (DN50-DN500, Mingyu brand), portable models are commonly used for on-site testing, emphasizing "instant clamping and testing, instant testing and travel". The 15 hour battery life supports full day inspection, completely avoiding the difficulties of wiring construction.

2. Wiring diagram for ultrasonic flowmeter

Ultrasonic flowmeter wiring is mainly divided into two parts: host wiring and probe wiring. There are differences between different brands and models, so it is necessary to follow the product manual for accuracy.

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2. Terminal 3 (GND, DN -, DN+), usually only need to be connected to DN - and DN+(terminals 2 and 3) - Upstream probe connected

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5. Terminal 6 (GND, UP -, UP+), usually only need to be connected to UP - and UP+(terminals 5 and 6) 4-20mA output: AO terminal connected to signal positive pole, 24V - terminal connected to signal negative pole 485 communication: connect 485 OUT A and 485 OUT B terminals Heat meter function: - Water supply terminal connected to TX

1. T

1. GND - Return terminal TX

2. T

2. GND (supply and return GND are connected together) Relay output: Connect RELAY+and RELAY - terminals 2. Probe wiring Probe cables usually include shielded wires, signal positive (+) and signal negative (-) terminals. Conventional connections only require connecting the+and - terminals, and shielded wires can be omitted. Due to possible differences in terminal definitions and wiring methods among different manufacturers, please make sure to check the wiring diagram provided in the instruction manual before actual wiring.

3. Doppler method ultrasonic flowmeter manufacturer

4. Are there any requirements for the insertion depth when installing Cologne ultrasonic flowmeter?

There are clear requirements for the insertion depth of the probe when installing the Cologne ultrasonic flowmeter, and it must be strictly operated according to the specifications. 1 The determination of insertion depth is mainly determined by the diameter of the pipeline, and the larger the diameter, the deeper the insertion depth. Small pipe diameters (such as below DN100) are usually inserted by a few centimeters, while large pipe diameters (such as above DN1000) may need to be inserted by more than ten centimeters or even deeper.

2. Core installation requires that the probe must reach a stable flow veloci

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