TQ402 111-402-000-012 A1-B1-C042-D000-E010-F0-G000-H10

Product Overview

For the specific model TQ402 111-402-000-012 A1-B1-C042-D000-E010-F0-G000-H10, according to the coding rules in the document, we can decode it as follows.

A1            Environmental type - Standard environment non-explosion-proof

B1            Thread specification - Metric thread

C042         Probe diameter - 8mm Code 42 corresponds to an 8mm probe

D000        Probe length - Standard length

E010        Cable length - 10 meters Integral Cable

F0            Cable protection - No armor None

H10         Total system length TSL - 10-meter system

Problems encountered during use

Linear deviation

If the target material is not standard VCL 140 steel, the measurement results may be inaccurate. TQ402 111-402-000-012 A1-B1-C042-D000-E010-F0-G000-H10 is recommended that if a special alloy is used, samples should be provided for special calibration.

Temperature influence 

Although the probe is resistant to high temperatures, if the cable is exposed to an environment above 200℃ for a long time, the insulation layer of the cable may be damaged.

Abnormal gap voltage

Improper installation of the gap will cause the output voltage to exceed the linear range of -1.6V to -17.6V.

Applicable scenarios and experiences

Monitoring of bearing seizure in centrifugal compressors of large chemical plants Background

The core centrifugal compressor of a chemical plant was operating in summer. The surface temperature of the bearing housing reached as high as 150℃, and there was a small amount of flammable gas present on site. Challenge

It is necessary to monitor the radial vibration of the rotor with an accuracy of micrometer level. Ordinary sensors suffer from severe zero-point drift under high temperatures, and the 10-meter long-distance transmission is prone to introduce interference, resulting in false alarms. Application

The engineer chose TQ 402. A 10-meter integrated cable was directly connected to the distant control cabinet, avoiding oxidation and poor contact at intermediate joints. The Torlon probe tip worked stably at high temperatures, and a 20kHz bandwidth successfully captured the early tiny peeling signals of the bearing, preventing unplanned shutdowns.

Installation Guide

Threaded Installation

If it is a metric thread, use tape or high-temperature sealant

Cable Handling

Do not use a wrench to tighten the connector. TQ402 111-402-000-012 A1-B1-C042-D000-E010-F0-G000-H10 should be hand-tightened only. Over-tightening will damage the precision ceramic insulator

System Length Verification

This product is a 10-meter system. If additional extension cables are needed on-site, ensure that the total length of "probe cable + extension cable" is greater than 8.8 meters and complies with the electrical trimming standards for the 10-meter system. Otherwise, it will cause sensitivity deviation

Shielding Grounding

The shielding layer of the coaxial cable must be grounded at one end to prevent ground loop interference