Integrative three-parameter combined probe is widely used in the research of cooling tower fan safety monitoring system. It is a general-purpose combined probe with non-bus structure.
The combined probe used for monitoring the safe operation of cooling tower fans integrates the sensing, conversion and transmission circuits for measuring the oil temperature, oil level of the reducer and the mechanical vibration signals of the fans. The probe directly outputs 4-20mA standard current signals corresponding to these safety parameters.
The probe can be directly connected with DCS and PLC computer measurement and control system.
Main functions and technical parameters
The integrated three-parameter combination probe is installed in the screw hole of the upper part of the fan reducer (or other equipment under test) in the form of external threads, and the probe rod is inserted into the reducer to obtain the lubricating oil temperature, lubricating oil level and vibration signals of the reducer and complete the transmission and output.
Temperature Measurement Characteristics: Lubricant Temperature Measurement Range: 0-100 C, Temperature Measurement Comprehensive Error: +3 C
Characteristic of oil level measurement: measuring range of lubricating oil level: -10-40, comprehensive error of oil level measurement: +5(0_is the lower oil limit position of normal oil level of reducer, and the medium to be measured must be non-conductive medium)
Vibration measurement characteristics: Vibration measurement range: 0-20/s, measurement output is proportional to the true effective value of vibration velocity (RMS), vibration measurement frequency range: 10-1000HZ, comprehensive error of vibration measurement: +1/s
Signal output characteristics: current mode output: DC/4~20mA, maximum load resistance measurement (including transmission line internal resistance) Rmax=(V-15)/0.02 (where V is the supply voltage)
Power Supply Characteristics: Recommended operating voltage: DC/24V+2V, no-load operating voltage: DC/15V, maximum overload voltage: DC/36V, maximum instantaneous operating current: 200mA, built-in voltage polarity reversal protection
Environmental characteristics: ambient temperature range: -20-80 C, ambient humidity range: 0-100% (port sealed with 704 silicone rubber), ambient vibration conditions: not less than 3 times the upper limit of vibration range.