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HS-620 Vibration Meter Kit
Operating Manual
Hansford Sensors Ltd.
August 2009
The HS-620 Vibration Meter Kit is an ideal low cost entry level vibration
monitoring instrument, designed for Maintenance Technicians to use on site,
helping to give protection to important plant machinery
This document may not be reproduced in any way without the prior written permission of
the company.
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Summary of Contents for Hansford sensors HS-620
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Page 1: Operating Manual
Operating Manual Hansford Sensors Ltd. August 2009 The HS-620 Vibration Meter Kit is an ideal low cost entry level vibration monitoring instrument, designed for Maintenance Technicians to use on site, helping to give protection to important plant machinery This document may not be reproduced in any way without the prior written permission of... -
Page 2: Table Of Contents
Contents ． Overview _______________________________________3 1.1 HS-620 Kit Contents ___________________________________3 1.2 Overall Vibration Mode _________________________________3 1.3 Bearing Status Mode ___________________________________3 ． Operating Instructions____________________________4 2.1 Sensor Connection _____________________________________4 2.2 Power On/Off_________________________________________4 2.3 Key Functions ________________________________________5 2.4 Overall Vibration Measurement & Assessment _______________6 2.5 ISO Machine Groups: __________________________________6... -
Page 3: Overview
The meter enables plant maintenance technicians to monitor machines, find potential problems in advance of failure, and to ensure machine reliability. 1.1 HS-620 Kit Contents VBA 20 meter unit with lithium battery fitted Hand Held Accelerometer with TNC Connector... -
Page 4: Operating Instructions
2．Operating Instructions BNC connector Integrated Cable LCD screen Sensor Magnetic BRG key Base SEL key VIB key Figure 1. The VBA20 2.1 Sensor Connection Fit the vibration sensor to the machine measurement position via a magnetic base or stud. Connect the sensor cable to the BNC connector on the meter. -
Page 5: Key Functions
2.3 Key Functions SEL key- Press SEL to switch-on the meter In the Overall Vibration mode press SEL to toggle through the measurement parameter options:- ‘Vel’ vibration velocity in mm/s RMS ‘Acc ’ acceleration in g pk ‘Disp’ displacement in µm pk-pk In the Overall Vibration Hold mode press SEL to toggle through the machine groups. -
Page 6: Overall Vibration Measurement & Assessment
2.4 Overall Vibration Measurement & Assessment At switch-on the meter defaults to the Velocity measurement mode, with the units ‘mm/s rms’ indicated at the bottom right of the display. If required, press SEL to select acceleration or displacement. Note that no vibration assessment is available on these ranges. -
Page 7: Bearing Status Check
2.6 Bearing Status Check Fix the sensor directly to the bearing housing as close to the bearing as possible. Note that valid high frequency readings are unlikely to be achieved using hand pressure and the spike. Press the BRG key to enter the Bearing Status mode. Press the SEL key to select either Bg (g RMS) or Bv (mm/s RMS). -
Page 8: The Iso10816-3 Machine Vibration Standard
3．The ISO10816-3 Machine Vibration Standard Industrial machines covered by the ISO10816-3 standard include :- Steam turbines with nominal power less than 50MW Steam turbines with nominal power above 50MW with speeds less than 1500rpm or above 3600rpm (ie. excludes machines included in ISO10816-2 Rotating compressors Industry gas turbines with nominal power less than 3MW... - Page 9 The machine mountings affect the resonances related to the basic running speed of the machine. Machines with rubber or spring mountings often vibrate at low speeds following start-up, and as the speed increases the vibration level is reduced. Such a machine is considered flexible mounted.
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Page 10: Bearing Status Assessment
4．Bearing Status Assessment When the rolling elements move inside a bearing, broadband noise and vibration is generated. This increases if the bearing is not properly greased, or overloaded due to misalignment or damaged surfaces. The bearing vibration Bg or Bv measured by the meter is the RMS value of all high frequency vibrations from a bearing between 1kHz and 12KHz. -
Page 11: Bv Values
Bg Max. Alert Warning Danger 1000 10000 Shaft Speed RPM 4.2 BV Values Bv measurement is a long established method for detecting bearing faults which gives reliable indication of bearing condition in 80-90% of cases. The rule-of-thumb assessment used in the meter is as follows:- BV ≤... -
Page 12: Specification
5．Specification Input ...... IEPE Accelerometer 100mV/g Vibration ....Acceleration: 0-20gPk, Frequency Range 5Hz-12kHz Velocity:0-200mm/s RMS, Freq. Range 10Hz-1kHz Automatic Alarm Check: ISO10816-3. Displacement: 0-2000µm Peak-Peak, Freq. Range 5Hz-1kHz Bearing: ....Bg: 0-20 g RMS Freq. Range 1kHz-12 kHz Bv: 0-200 mm/s RMS, Freq. Range 1kHz-12 kHz Automatic Alarm Check for BG and BV: Rule-of- thumb Accuracy:.... - Page 13 Model No. HS-620 Serial No. ___________ Calibrated By ______ Date of Calibration _________ Hansford Sensors Ltd, Artisan, Hillbottom Road, Sands Industrial Estate, High Wycombe, Bucks, HP12 4HJ. tel. +44 (0)845 680 1957 fax. +44 (0)845 680 1958 - 13 –...
- Page 14 Hansford Sensors Ltd Artisan, Hillbottom Road, Sands Industrial Estate, High Wycombe, Bucks, HP12 4HJ. UK. Tel: +44 (0)845 6801957, Fax: +44 (0)845 6801958 Web site: www.hansfordsensors.com - 14 –...
- Page 15 Ref: HS-620 Manual 2009 QM014 Issue 2 - 15 –...
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