Bruel Kjaer Vibro IN-081 Non-Contacting Displacement Sensor with integrated Oscillator Instructions

: June 6, 2024
: Bruel Kjaer Vibro

Table of Contents

Instruction
Hints
Application
Dimensioned drawing
Connection
Sensitivity of the displacement sensor
Mounting the displacement sensor
Technical Data
Declaration of Conformity
Contact
Documents / Resources

IN-081 Non-Contacting Displacement Sensor
with integrated Oscillator
Instruction Manual

Instruction

IN-08x
Non-Contacting Displacement Sensor with integrated Oscillator

Keep accessible for future reference

Copyright © 2021 Brüel & Kjær Vibro GmbH
All rights to this technical documentation remain reserved.
Any corporeal or incorporeal reproduction or dissemination of this technical documentation or making this document available to the public without prior written approval from Brüel & Kjær Vibro GmbH shall be prohibited. This also applies to parts of this technical documentation.
Instruction Sensor IN-08x, C102976.002 / V13, en, date of issue: 15.11.2021

Brüel & Kjær Vibro GmbH
Leydheckerstrasse. 10
64293 Darmstadt
Germany
Phone: +49 6151 428 0
Fax: +49 6151 428 1000| Brüel & Kjær Vibro A/S
Lyngby Hovedgade 94, 5 sal
2800 Lyngby
Denmark
Phone: +45 69 89 03 00
Fax: +45 69 89 03 01| BK Vibro America Inc
1100 Mark Circle
Gardnerville NV 89410
USA
Phone: +1 (775) 552 3110
---|---|---
Hotline
Phone: +49 6151 428 1400
E-Mail: support@bkvibro.com| Homepage
www.bkvibro.com| Corporate E-Mail
info@bkvibro.com

Hints

NOTE!
This manual is a part of the product. Read the manual carefully before using the product and keep it accessible for future use.

Pictograms and their Meanings
This symbol warns of dangerous situations which can result from the misuse of the product.

User Qualification
Ensure that all work in conjunction with our systems is performed by a skilled, expert, and authorized workers. Among these works are:

Installation and Commissioning
Installation and commissioning primarily concern work on electrical equipment. These works may be performed exclusively by electricians or workers instructed and supervised by an electrician in accordance with electrotechnical regulations/directives.

Change of System Specification
Any change of system specification has its effects on the monitoring process with stationary systems and on the measuring sequence with portable measuring systems.

Intended Use
If sensors and the cables are used in a way not described in the relevant user manuals, function and protection may be impaired and serious personal damage, death or serious, irreversible injuries may result.

Exclusively use the sensor as specified in the datasheet. Any use other than specified is considered inappropriate. Brüel & Kjær Vibro does not assume any liability for damages resulting from inappropriate use. The user is solely responsible. For originally intended use, see system documentation.
Mounted sensors must not be used as steps.
Ensure that system is exposed only to admissible environmental influences specified in the technical system datasheet.
Handle the systems with care in order to prevent damage to the systems or personal damage due to falling.
Maintain electrical equipment in regular intervals. Remedy defects, e.g. loose wires, defective connectors, immediately.
Check cable and connectors in regular intervals.
Never use the cable to pull the plug out of the socket.

Hot surfaces

In line with the user manuals, sensors and cables can be operated in extensive ambient temperature ranges, whereby they can become hot through self-heating on housing walls and can produce burning.
When mounted at external heat or cold sources (e.g. machine parts), systems, sensors and cables can adopt dangerous temperatures, whereby burning, among other things, can occur in the event of contact.

Recommendations to User
If the use of the system in conjunction with machines or plant sections can produce risks outside of Brüel & Kjær Vibro’s responsibility, the user is expected to prepare and distribute safety technical instructions or warnings and to ensure that the person concerned has received and understood the same.

If the system is integrated into a machine or designed to be assembled, commissioning must not take place until the machine the system is to be integrated in conforms to the EC directives.

Prohibition of Unauthorized Modifications
System and accessories must not be changed either in construction or safety technology without the express consent of Brüel & Kjær Vibro. Any unauthorized modification excludes Brüel & Kjær Vibro’s liability for resulting damages.

Application

The non-contacting displacement sensors are used to measure relative shaft vibration, relative shaft displacement, rotor speeds ect. A prerequisite for measurement is a metallic measuring surface, preferably made o 42CrMo4.
The output voltage of the sensor is proportional to the distance between the probe tip and the measuring surface, within the displacement measuring range.
Extraneous disturbances, such as earth loops, temperature influences and dielectric influences like oil and gas can be neglected.
Direct connection of signal cables with a length up to 1000 m, is possible. More ever, the sensor can be replaced without recalibration.

Dimensioned drawing

IN-081 Bruel Kjaer Vibro IN 081 Non Contacting Displacement Sensor with
integrated Oscillator - figure 1

IN-085

Sensor length L1|
---|---
IN-081| 70 … 250 mm
IN-083| 70 mm
IN-084| 60 mm
IN-085| 70 … 150 mm
Thead G, diameter D1| M10 x 1 – 6 g, Ø 8,5 mm
3/8″ – 24 UNF -2 A, Ø 8 mm
Cable length K| approx. 5 m with pig-tails

Connection

Connection for IN-085

Figure 4-1) Socket assignment
1 = -DC
2 = SIG
3 = COM

Sensitivity of the displacement sensor

Dependent on measurement track material
The displacement sensor is calibrated for material no.: 1.7225 (42CrMo4) in accordance with DIN 17 200, corresponding to AISI/SAE 4140.
The sensitivity is -8mV/mil).
Further materials and their sensitivities are listed in the table below.
The sensitivity of a material can be determined by means of a material specimen with the help of a Brüel & Kjær Vibro calibration unit AC-126. Calibration to other materials is affected by the electronic at the measuring system.

At room temperature

Mat. no.: acc. to
DIN 17 200| Abbreviated| Sensitivity -mV/mm
---|---|---
1.005| St 50-2| 7,90
1.0062| St 60| 7,90
1.0501| C 35| 7,95
1.0503| C 45G| 7,80
1.1181| CK 35| 7,85
1.1191| C 45| 7,90
1.2241| 51CrV4| 8,20
1.2841| 90MnCrV4| 7,80
1.4006| X10Cr13| 7,40
1.4028| X30Cr13| 7,50
1.4057| X22CrNi17| 7,25
1.4104| X12CrMoS17| 7,50
1.4313| G-X5CrNi13 4| 7,35
1.4406| X5CrNiMoN18 12| 10,45
1.4449| X5CrNiMo17 13| 7,65
1.45| G-X7NiCrMoCaNb2520| 10,35
1.4541| X10CrNiTi18 9| 7,80
1.4571| X6CrNiMoTi17 12(2)| 10,40
1.4922| X22CrMoV12 1| 7,45
1.6562| 40NiMoCr7.3| 7,50
1.658| 30CrNiMo8| 7,80
1.6587| 17CrNiMo6| 7,80
1.7219| 27CrMo5| 8,05
1.7225| 42CrMo4| 8,00
1.807| 21CrMoV5 11| 7,80

Mounting the displacement sensor

Mounting advice
The installation of the displacement sensor must be result accordingly at the „Mounting instructions for displacement sensors„ !
Sensors for non-contacting displacement measurement are pre-ferrably to be mounted onto such machine components whose natural vibration does not falsify the measured result.
The sensor mounting torque is 4,5 Nm.

Free space and minimum distances for non-contacting displacement sensors
Non-contacting displacement sensors operating according to the eddy-current principle create a high-frequency electromagnetic field.
If any electrically-conducting material apart from the measured object enters this field, the measurement results will be falsified; therefore during the installation of non-contacting displacement sensors, the following free space, and minimum distances must be maintained:

Bruel Kjaer Vibro IN 081 Non Contacting Displacement Sensor with integrated
Oscillator - figure 4

HINT!
If the free space and minimum distances cannot be observed due to constructional restrictions, the manufacturer must be consulted.

Technical Data

Measured parameter| relative shaft vibration
relative shaft displacement
---|---
Measuring principle| eddy-current principle
Frequency range
Sensitivity| 0 … 2 600 Hz (-3 dB)
-8 mV/mm (material 42CrMo4)
For other material refer to table page 8
Displacement measuring range, linear| 1,5 mm
Sensitivity error| < ± 5 % at room temperature (+ 22 °C)
< ± 10 % in operating temperature range
Deviatation from reference line| ± 2 % at room temperature (+ 22 °C)
± 10 % in operating temperature range
Displacement measuring range with an additional deviation of 5 %| 2,4 mm
Average working position| Gap voltage -9 V

HINT!
The tip of the IN-084 sensor is sealed with lacquer for protection against humidity (water).
This is also available as an option for other sensors of the type IN-08x.

Temperatures

Connection for IN-081, IN-083 and IN-084

Cable	3 cores, shielded, pig tails
Shielding	not connected to sensor housing
Protection class acc. to EN 60 529	IP 54
Core colour	red = -DC

white = COM
yellow = SIG
yellow/black = Shield
Admissible cable length| 1000 m
Weight| approx. 120 g

Characteristic curve of displacement sensor

Bruel Kjaer Vibro IN 081 Non Contacting Displacement Sensor with integrated
Oscillator - figure 5

Sensor temperature, constant (t = 25° C). Supply voltage -24 V.
Test material 42CrMo4 AISI 4140
Typical transmission characteristics curve (Pos. 1)
Typical sensitivity characteristics curve (Pos. 2)

The characteristic curve of sensitivity

This describes the incremental gradient (sensitivity factor) as a function of the gap between the sensor tip and the measurement surface.

Nominal measuring sensitivity
-8 mV/µm (-200 mV/mil) (with standard shaft material Material no.: 1.7225 acc. to DIN 17 200 with composition 42CrMo4).

EMC
see EMV-Datasheet: EMC data of displacement sensors Type IN – …

Calibration
The sensor can be exchanged without requiring re-calibration of the instrumentation.
The sensor complies with the essential accuracy requirements of standards API 670 and DIN 45670.

Disposal

After use, dispose of the systems, cables, and sensors in an environmentally friendly manner, in accordance with the applicable national provisions.
WEEE-Reg.-No. DE 69572330

Declaration of Conformity

Bruel Kjaer Vibro IN 081 Non Contacting Displacement Sensor with integrated
Oscillator - figure 7

Contact

Brüel & Kjær GmbH
Leydheckerstrasse 10
64293 Darmstadt
Germany
Phone: +49 6151 428 0
Fax: +49 6151 428 1000| Brüel & Kjær Vibro A/S
Lyngby Hovedgade 94, 5 sal
2800 Lyngby
Denmark
Phone: +45 69 89 03 00
Fax: +45 69 89 03 01| BK Vibro America Inc
1100 Mark Circle
Gardnerville NV 89410
USA
Phone: +1 (775) 552 3110
---|---|---

Corporate E-Mail: info@bkvibro.com
Homepage: www.bkvibro.com
Sensor IN-08x ● © Brüel & Kjær Vibro ● 11/2021 ● C102976.002 / V13 ●
Technical alterations reserved!