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PCE Instruments PCE-VM 25, Руководство пользователя

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Address:East Room 306,3th Floor,1st Building,Shenhua Industrial Park,Meihua Road, Futian District,Shenzhen City

Tel:0755-32978297

Email:[email protected]

Figure 6: Frequency response curves for displacement

The following formula applies to sinusoidal signals which have been formed through double integration:

In the case of constant acceleration (a) it is visible that the displacement value (d) decreases quadratically with increasing frequency (f). As a consequence the
measuring range limits of displacement measurements are strongly frequency dependent. The next Figure 7 shows the measurement range limits depending on
frequency.

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ng
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Figure 7: Frequency response curves for displacement (RMS)

The maximum displacement of the PCE-VM 25 that can be measured is around 60 mm (RMS). It yields a frequency independent modulation range of up to 10
Hz. At higher frequencies the measuring range limits for acceleration of around 240 m/s² take effect.

EN - 8

Содержание PCE-VM 25

Страница 1: ...Room 306 3th Floor 1st Building Shenhua Industrial Park Meihua Road Futian District Shenzhen City Tel 0755 32978297 Email hj pce instruments cn User Manual VIBRATION TESTER PCE VM 25 EN Version 1 0 PC...

Страница 2: ...us www pce instruments com english Spain Chile PCE Ib rica S L PCE Instruments Chile SPA Calle Mayor 53 RUT 76 423 459 6 02500 Tobarra Albacete Badajoz 100 oficina 1010 Las Condes Espa a Santiago de...

Страница 3: ...tions 12 5 3 VMID Measurement Point 13 5 3 1 How the VMID Measurement Point Functions 13 5 3 2 Mounting the VMID Measurement Point 13 6 Measurement 13 6 1 Measurement Value Display 13 6 2 Selecting th...

Страница 4: ...n electronic measurement point detector VMID which enables it to take routine measurements of a large number of measurement points very effectively A software package for transferring the measurement...

Страница 5: ...Velocity and displacement are generated by single or double integration of the sensor acceleration signal Furthermore various frequency ranges can be selected The display rate adjusts itself accordin...

Страница 6: ...veral factors have a mutually reinforcing effect Besides rotating machines the measurement procedure is also suitable for reciprocating machines The specifications of vibration velocity measuring inst...

Страница 7: ...n is further restricted 3 4 Vibration Displacement The vibration quantity most easily observed is displacement also known as the deflection of the vibration It is formed by double integration of the a...

Страница 8: ...displacement value d decreases quadratically with increasing frequency f As a consequence the measuring range limits of displacement measurements are strongly frequency dependent The next Figure 7 sh...

Страница 9: ...tion the K t value may also increase at a low rate In this way the condition of the rolling bearing can be classified K t Rolling Bearing Condition 1 Improvement 1 0 5 Good condition 0 5 0 2 Damage pr...

Страница 10: ...ies remove the two screws from the back cover of the device and open the battery compartment Figure 8 When inserting the batteries please ensure that their polarity is correct see the engraved marking...

Страница 11: ...echargeable 1 5 V or NiMH accu rechargeable 1 2 V Confirm your choice by pressing OK and exit the menu by pressing F3 repeatedly If the power supply drops below 3 3 V when using alkaline batteries or...

Страница 12: ...5 2 ISO 10816 1 Recommendations The standard ISO 10816 1 recommends bearing housings or their immediate surroundings as preferred measuring location points for the measurement of machine vibrations F...

Страница 13: ...issible operating temperature for the VMID is 80 C 5 3 2 Mounting the VMID Measurement Point A VMID measurement point is mounted onto the machine using two component epoxy adhesive For an accurate vib...

Страница 14: ...layed value The crest factor is the relation between crest value and RMS It is used to describe the curve form For a sinusoidal signal it amounts to 2 1 41 The more impulsive the signal the higher the...

Страница 15: ...ers each is assigned for each measurement point text The text is entered using keys By pressing keys you can change the character position Both capital letters A to Z and numbers 0 to 9 are available...

Страница 16: ...section 6 3 2 the measurement point texts and the operating mode allocated to the measuring point can be changed In the sub menu Edit Point ID press or hold down until the text you wish to edit is dis...

Страница 17: ...en the first and last saved measurement Below the diagram there is a red marker This can be moved horizontally to read the magnitude using the keys The marker only skips forward to time points which a...

Страница 18: ...ng the total number of records 6 8 K t Measurement The basics of rolling bearing parameters K t can be found in section 3 5 First use keys to select the operation mode Roll bearing Figure 26 Figure 26...

Страница 19: ...MS 0 and Peak 0 Figure 28 Figure 28 Saving K t start values When the sensor is newly placed on the VMID measuring point the instrument automatically switches to the K t display It then reads the start...

Страница 20: ...base memory you can scroll through the saved start values using the keys Press F1 to delete an entry In the sub menu Erase K t memory all saved K t start values can be deleted as a whole Figure 30 K t...

Страница 21: ...locity spectra can be distinguished by the headline and a different color of the cursor line The left end of the frequency axis always represents 0 Hz However the 0 Hz line and for velocity also the n...

Страница 22: ...ou see a record number and the total number of records in the memory In the second line you find a VMID text if a VMID measuring point was used and a text entered see section 6 3 2 If no text was ente...

Страница 23: ...t needs to be marked with a piece of reflective film Self adhesive reflective film can be purchased from Sick for example the material REF PLUS Press the or key until rotation speed and temperature ar...

Страница 24: ...emperature Measurement The temperature measurement is carried out together with the rotational speed measurement Figure 35 The PCE VM 25 contains an infrared temperature sensor inside the upper part a...

Страница 25: ...s are defined which can provide an initial evaluation of a machines maintenance condition The four zone boundary limits characterize the machine in categories according to vibration severity A New con...

Страница 26: ...ised in 2009 the zone borders are specified for vibration severity of machines with a power of 15 kW to 50 MW Table 2 Table 2 Vibration Severity classification in accordance with ISO 10816 3 Part 7 of...

Страница 27: ...The sign changes to minus at 254 ppm Example The clock is 5 seconds slow There are 24 60 60 s 86400 seconds in a day The difference amounts to 5 s 86400 s 58 10 6 58 ppm The adjustable value is 58 ppm...

Страница 28: ...ne or more vibration amplitudes and frequencies with defined accuracy For the calibration of the PCE VM 25 a sufficient acceleration would be 10 m s at 159 2 Hz radian frequency 1000 s 1 Figure 39 Vib...

Страница 29: ...made of the sensor s operating condition The PCE VM 25 detects three operational conditions 0 1 V short circuit 0 1 11 V in working order 11 V open input e g broken cable If a short circuit occurs or...

Страница 30: ...the other end of the cable to a USB port of the computer and switch the PCE VM 25 on again If the instrument is being connected with a particular computer for the first time a driver installation wil...

Страница 31: ...n Load in the Firmware Updater and enter the path to the file where the downloaded firmware file pce vm2x hex is located Figure 48 Firmware Updater 5 Connect the PCE VM 25 to the PC using the USB cabl...

Страница 32: ...utterworth filter Overload indication at 200 m s vibration acceleration on the sensor or 1000 mm s or 60 mm after the integrator Frequency analysis 125 lines peak value of vibration acceleration or ve...

Страница 33: ...ial number and text Mounting the VMID Mounting the VMID Mount with two part adhesive e g LOCTITE Hysol 3430 or 3450 Maximum temperature 80 C Limited Warranty Metra warrants for a period of 24 months t...

Страница 34: ...Address East Room 306 3th Floor 1st Building Shenhua Industrial Park Meihua Road Futian District Shenzhen City Tel 0755 32978297 Email hj pce instruments cn Declaration of conformity EN 34...

Страница 35: ...ess East Room 306 3th Floor 1st Building Shenhua Industrial Park Meihua Road Futian District Shenzhen City Tel 0755 32978297 Email hj pce instruments cn Specifications are subject to change without no...

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