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Time 7231 Instruction Manual

Vibration tester
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TIME
7231 Vibration Tester
R
Instruction Manual
（V20140428）
Beijing TIME High Technology Ltd.
37

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  • Page 1 ○ TIME 7231 Vibration Tester Instruction Manual （V20140428） Beijing TIME High Technology Ltd.

  • Page 2: Table Of Contents

    Contents General Descriptions ....................1 Technical terms ......................4 Configuration ....................... 6 Installation of Transducer ................... 8 How to use the accessories ..................27 Trouble shooting ....................... 28 Maintenance ....................... 29 Appendix 1: Vibration standard ..................30 Appendix 2 Vibration frequency and possible reason..........33...

  • Page 3: General Descriptions

    ○ TIME 7231 uses piezoelectric acceleration transducer to convert vibration signal into electric signal. Then by analyzing input signal, results including RMS of velocity values, peak-peak value of displacement, peak values of acceleration or real-time spectral charts are displayed or printed out.
  • Page 4 Acceleration:1.0m/s ~392.0 m/s (Peak) Measuring range Velocity:0.10cm/s~80.00cm/s(RMS) Displacement:0.01mm~18.10mm(Peak-Peak) Acceleration: 10Hz~10kHz Frequency range Velocity: 10Hz~1kHz Displacement10Hz~500Hz ±5% Accuracy Temperature 0℃~40℃ Relative humidity ≤80%RH 1.4. Other parameters  Display screen: 320× 240 dot matrix  Battery’s parameters: Li battery, work 20 hours continuously. ...
  • Page 5 Memory function: It can store 100× 100 measurement values and 100 spectral charts.  Li battery is used: The battery can charge at any time safely and it can work continuously for a long time after charging is finish. ...

  • Page 6: Technical Terms

    Vibration velocity: The rate of speed of vibration. Vibration acceleration: The rate of change of vibration velocity with respect to time. Vibration frequency: The number of complete cycles of vibration per unit time. Point number: One point number correspond to one testing point Patrol test: Test more than one point in a fixed routine.
  • Page 7 Figure 2-1...

  • Page 8: Configuration

    3 Configuration 3.1. Description of components According to different situations, the transducers maybe fixed in the probe groupware or connected to the magnetic base (see chapter 4 in detail.). Figure 3-1 1. Main body 2 .Probe groupware 3.Long needle 4.Vibration transducer 5.Bolt 6.Magnetic base...
  • Page 9 3.2. Appearance Figure 3-2 1. Obligate 2.Charger indicator 3.Display screen 4.Keyboard 5.Transducer socket 6.A sensitivity knob in the hole 7.Charging socket 8.Communication socket...

  • Page 10: Installation Of Transducer

    4 Installation of Transducer 4.1. Installation principle  The testing position should show the vibration characters of the object to be tested.  The main axis of the transducers should be consistent with the direction of the object to be tested. ...
  • Page 11 4.2.1. Installed with bolt Application range: Screw eye has no influence on the running of the object being tested. Usage: Drill a screw eye 5mm deep in the object being tested. Connect the transducer to the object by bolts (see Figure 4-1).
  • Page 12 Vibration transducer √ × × Bolt M5 Magnetic base Object being tested surface The surface is The surface The surface is rough. slick and flat. is uneven. Figure 4-2 Operation tips: Before measurement ,pay attention to : (1) The surface being tested should be flat and the roughness should be less than 1.6 (2) The iron wafer under magnetic base should be taken off.
  • Page 13 Hold Vibration transducer Needle √ × × × Object being tested surface The needle makes the The mass is Forming bevel between the Forming right angles between needle and the surface. surface distortion. too small. the needle and the surface. Figure 4-3 4.3.
  • Page 14 Press to cancel or return last menu, press to end measurement when in measuring status. ● Press for obligate ● Press to switch on/off buzzer. ● Press to switch on/off the point increment function. ● Menu in reverse video indicates the item is selected. For example is in being selected status, while ●...
  • Page 17 Figure 4-4 From the figure 4.4,the main menu comprise four basic function block: Measurement setting: the selection of measurement parameters ● Analysis: description in spectral chart and easy diagnosis of the vibration. ● View: view the stored measurement result. ● System: setting of the system parameters ●...
  • Page 18 (1) Battery: Display battery status. Operation tips: The gauge will shut down automatically when displays, please charge it in time to avoid the influence of “use” and “accuracy of measurement It will shorten charge time if the unit switch on and is shut down.
  • Page 19 （1） （2） （3） （4） （5） （6） （7） （8） （10） （9） （a） （b） Figure 4-5 Main interface （2）Point increment: Press to switch on/off the “point increment” function. , it is allowed to use “point increment” function. For example: when a testing operation of current Select point number is finished, the point number will increase automatically , and go into the waiting state of the next point number.
  • Page 20 ●Numerical value display comprise: measured value, measured time, preset parameters and histogram, and histogram is the description of relationship of “alarming value”, “warning value” and “measured value”. ●Spectrum display comprise: spectrum chart of measurement and the corresponding ending time of measurement.
  • Page 21 Operation tips: Switch between numerical value display mode and spectrum mode of measurement can be performed by pressing 4.4.1 Measuring settings The initial interface of measuring settings are displayed as figure 4.3.Mesuring setting contains: parameters, velocity, displacement. There is several parameters, tester can select proper parameters according to specific measurement requirement (see Table4.2): Table 4.2 Operation tips:...
  • Page 22 Acceleration Velocity Displacement Parameters 10Hz-200Hz 10Hz-200Hz 10Hz-200Hz Transmission 10Hz-500Hz 10Hz-500Hz 10Hz-500Hz Bands 10Hz-1kHz 10Hz-1kHz 10Hz-10kHz Default warning values 392 m/s 80 cm/s 18.1 mm Default alarming values 392 m/s 80 cm/s 18.1 mm Figure 4-6 Measuring setting interface...
  • Page 23 4.4.2 Analysis Analysis interface display as figure 4.4.It contains 1×spectrum: analysis spectral lines=200 2×spectrum: analysis spectral lines=400 4×spectrum: analysis spectral lines=800 The resolution of 1X spectrum,2X spectrum,4X spectrum in different transmission band see Table 4.3 Table 4.3 Transmission Band 1X spectrum 2Xspectrum 4X spectrum resolution...
  • Page 24 If you did not store the spectrum chart, when you enter “Analysis” function, submenu can not be entered. ○ TIME 7231 can print out spectrum chart via TA230; X0: the position of initial frequency Xmax: the position of ending frequency Xdiv: frequency division...
  • Page 25 Users can look through the measurement results stored in the memory by selecting “View”. The information of each measurement result comprises point number, testing time, measured values and prompt information (“!” indicates the measured results exceeds alarming value, “！” indicates the measured results exceeds warning value(see Figure 4.5).It contains:...
  • Page 26 ●Current: Press to print or delete selected measured results. ●Current page: press to print or delete all the measured results displayed in the page. ●All: press to print or delete all the measured results of the point.
  • Page 27 For each test point number, system can store 100 measured value and 1 spectrum chart. After each measurement is finished, the corresponding values and spectrum chart are stored in real time; when another measurement performed in the same point number, the former spectrum chart will be replaced by the latest one, and the measured value are stored in memory in sequence.
  • Page 28 System menu comprise: ●Time setting: Key in number to set the “Year”, “Month”, “Date”, “Hour” and “Minute”. ●Auto shut down: Key in the time of auto shut down, the range is 1 to 30 minutes. The default time is 30 minutes.

  • Page 29: How To Use The Accessories

    ○ ○ TIME 7230 connects to printer or PC through a communication cable. One end is connected to TIME 7230 through RS232 serial port, and the other end is connected to printer or PC through a 9-pin connector. How to use the software can refer to the specifications of the corresponding software.

  • Page 30: Trouble Shooting

    1. Make sure the printer is in “Ready” status. 2 .Make sure the printer is connected well to the power. 3. Make sure the printer is connected well to the meter. If some trouble can not be overcome, please contact to TIME Group Inc.

  • Page 31: Maintenance

    ○ body of TIME 7230, especial the display window, little water can be used to clean to meter smoothly. How to use the connector: Don’t plug the connector of the transducers, printer or PC, when TIME ○ 7231 is power on.

  • Page 32: Appendix 1: Vibration Standard

    Appendix 1: Vibration standard a. Rank of machine vibration (ISO2372) Vibration amplitude Machine sort Vibration Velocity Ⅰ Ⅱ Ⅲ Ⅳ (mm/s) 0.28 0.45 0.71 1.12 11.2 Note: (1) ClassⅠ is small motor (power less than 15kW). Class Ⅱ is medium motor (power between...
  • Page 33 15kW~75kW). Class Ⅲ is high power motor (hard base); Class Ⅳ is high power motor (stretch base). (2) A, B, C, D are vibration rank. “A” means good, “B” means satisfying, “C” means not satisfying, “D” means forbidden. Vibration velocity should be taken from the three perpendicular axes on the motor shell. b.
  • Page 34 (rpm) Stretch base Hard base 720~1499 50.8 63.6 1500~2999 38.1 50.8 ≥3000 25.4 25.4 *American Petroleum Institute (API) established this standard. e. ISO/IS2373 Motor quality standard according as vibration velocity. H: High of shaft (mm) Quality rank Rev (rpm) Maximum vibration velocity (rms)(mm/s) 80<H<132 132<H<225 225<H<400...

  • Page 35: Appendix 2 Vibration Frequency And Possible Reason

    Appendix 2 Vibration frequency and possible reason Most Vibration possible Other possible reason Note frequency reason 1) Eccentric of gear, belt sheave and bush 2) Shaft is not in the middle or curving (if vibration Synchronous on the shaft direction is high), Imbalance with 3) Belt fault...
  • Page 36 mechanical 2× N× (N is the paddle number of the fault pump loose, reciprocating or fan) force 1) Drive belt fault Oil film eddy < 2) Interferential vibration turbulence 3) Beat frequency Synchronous Electric fault such as rotor broken, rotor eccentric, Armature with power three phase imbalance and air clearance not...
  • Page 37 ○ TIME VIBRATION TESTER TIME 7231 PACKING LIST Description Note Description Main unit Probe Leather wrap Power adapter Magnetic base Instruction manual Warranty card...
  • Page 38 TIME certificate...

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