Use of cables dedicated for instruments
Thread Content
Cables dedicated for measuring instruments are used to establish connections between the sensors and transmitters of such instruments; in general, ordinary wires or cables cannot be used without the approval of the manufacturer’s technical staff； Colleagues should pay attention to the length of cables and their impact on signals: voltage, resistance, capacitive reactance, and current. If the power cable of an electro-hydraulic converter is too long, the voltage division provided by the converter will not meet the requirements ； The cable length between the Bentley vibration preamplifier and monitor is 305 meters ； Problems that arise when a pH meter uses ordinary wires to extend the sensor cable, resulting in signals that do not change with solution concentration, include: 1. Flow meters: electromagnetic, vortex, mass ； 2. Analytical instruments: pH meter, conductivity meter, dissolved oxygen meter, color and turbidity meter, etc. Conclusion: Generally, the cables provided by manufacturers should not be extended or shortened arbitrarily to avoid additional errors, interference, or even the inability to carry out measurements at all. 2023.9.19
Cables dedicated for instruments are used in measuring instruments, including the connections between sensors and transmitters in analytical instruments. The use of these cables must be approved by the manufacturer’s technical staff; ordinary wires or cables cannot be used arbitrarily. The length of the cable has an impact on the signal, and factors such as voltage, resistance, capacitive reactance, and current need to be taken into consideration. For example, if the power cable of the electro-hydraulic converter is too long, it may result in the voltage division provided by the converter not meeting the requirements ； Similarly, if the cable length between the Bentley vibration preamplifier and the monitor exceeds 305 meters, it will also have an impact ； For another example, if a pH meter uses ordinary wires to extend the sensor cable, it may cause the signal not to change with the solution concentration. In practical applications, cables specifically designed for instruments are widely used in various measuring instruments. For example: 1. Flow meters: such as electromagnetic flow meters, vortex flow meters, mass flow meters, etc. 2. Analytical instruments: such as pH meters, conductivity meters, dissolved oxygen meters, color and turbidity meters, etc. In general, when using cables designed for instruments, it is not advisable to arbitrarily extend or shorten the cables provided by the manufacturer, in order to avoid additional errors, interference, or even situations where measurement becomes impossible. .