Table of Contents
Summary of Contents for CEMB TR-NC/8
- Page 1 Vibration equipment division TR-NC/8 CoNTaCT RaNsmiTTeR se aNd maiNTeNaNCe iNsTRUCTioN maNUal CEMB S.p.A. www.cemb.com Via Risorgimento, 9 23826 MANDELLO del LARIO (Lc) Italy *Translation of the original instructions...
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Page 3: Table Of Contents
4.8 d eviceS for SenSor inStallation nstallatIon 5.1 F inal poSitioning 5.2 g eneral ruleS for proper electrical inStallation 5.2.1 E lEctrical cabinEt 5.2.2 W iring 5.2.3 c ablE shiElding 5.2.4 E arthing 5.2.5 T roublEshooting TR-NC/8 - R .02/2013... - Page 4 TR-NC/8 - R .02/2013...
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Page 5: G Eneral Description
(speed measurement). ystem composItIon The TR-NC8 measuring system is made up of three parts: • T-NC8/API series no-contact sensor • T-NC/API series extension cable • TR-NC8 transmitter No-contact sensor Extension cable TR-NC/8 - R .02/2013... -
Page 6: O Perating Principle And Typical Applications
The total length of the cable between the sensor and the transmitter represents an “electrical length“, which means that each system is calibrated in the CEMB laboratory for a specific total cable length, consequently, any change in length on a pre-calibrated system will give rise to measurement errors. -
Page 7: S Pecifications
~ 1 Kg Sensor weight ~ 0,1 Kg Maintenance none ATEX certified version for applications in classified areas Special versions II 1 G Ex ia IIC T5 Ga II 1 G Ex ia IIC T6 Ga TR-NC/8 - R .02/2013... - Page 8 TR-NC/8 - GAP 10,00 5,000 Tensione [V] 9,00 4,800 Sensibilità [V/mm] 3.94V/mm ±5% 8,00 4,600 7,00 4,400 6,00 4,200 5,00 4,000 4,00 3,800 3,00 3,600 2,00 3,400 1,00 3,200 0,00 3,000 0,00 0,20 0,40 0,60 0,80 1,00...
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Page 9: R Ules For Proper Installation
In relatIon to the poWer supply voltaGe Power supply [V] onnectIon dIaGram +24Vdc LOOP SUPPLY MEASURE (PLC or DCS) CABLE LOAD RESISTANCE MEASURE LOAD TR-NC/8 - R .02/2013... -
Page 10: M Aterial Of The Area The Sensor Faces
Unless otherwise requested, the measuring system is calibrated in the CEMB laboratories using AISI 4140 stainless steel (42CrMo4) as reference material, which is normally used in the construction of machine shafts. -
Page 11: Q Uality Of The Surface The Sensor Faces
The RUNOUT is constant in phase and amplitude as the number of revolutions vary and might be added to or subtracted from the actual vibration, falsifying the measurement made. RUNOUT and vibration shifted 180° out of Measured vibration Actual RUNOUT vibration RUNOUT Measured vibration RUNOUT in phase with vibration Actual vibration TR-NC/8 - R .02/2013... -
Page 12: D Evices For Sensor Installation
Otherwise the sensors can be installed on brackets or rigid supports. In the latter case, be particularly careful to fasten the sensors as rigidly as possible in order to minimise vibrations due to installation. Example of fastening devices TR-NC/8 - R .02/2013... -
Page 13: I Nstallation
For sensors installed inside the bearing support, it is advisable to measure the total depth of the hole using a gauge and screw in the sensor so that the mechanical gap is approximately 1.5 mm • Recommended probe case torque 10 N x m. For the first 10 threads, maximum torque 3 N x m. TR-NC/8 - R .02/2013... - Page 14 TR-NC/8 - R .02/2013...
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Page 15: F Inal Positioning
5.2.1 lEctrical cabinEt A system should have a dedicated cabinet for the power devices and one for the control devices. If sharing the same cabinet, it is recommended to use a shielding wall connected to earth. TR-NC/8 - R .02/2013... -
Page 16: W Iring
Keep a distance of > 100mm from the conductors, which are a source of disturbance. If using a cable with a larger number of conductors than necessary, all the unused conductors must be connected to earth together with the shield. TR-NC/8 - R .02/2013... -
Page 17: C Able Shielding
The persons that work with the TR-NC8 monitoring system must have adequate technical training and qualifications. Recommended operations to check for system faults: TYPE OF FAULT 4-20mA LOOP READING Demodulator not connected or damaged Sensor not connected or damaged about 2mA TR-NC/8 - R .02/2013... - Page 18 TR-NC/8 - R .02/2013...