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Rion VM-83 Instruction Manual

Manual is about: VIBRATION METER

Summary of VM-83

  • Page 1

    Instruction manual vibration meter vm-83 3-20-41 higashimotomachi, kokubunji, tokyo 185-8533, japan www.64817.Com www.64817.Com.

  • Page 3: Outline

    I organization of this manual this manual describes the features and operation of the vibration meter vm-83. To ensure safe use, the manual first lists important safety precautions. Be sure to read this section thoroughly. The manual contains the following sections. Outline gives basic information o...

  • Page 4

    Ii this item is classified as "a regulated product or regulated technol- ogy in the foreign exchange and foreign trade control act". Export of this item from japan requires an export license from the government of japan. The product described in this manual is in conformity with the following europe...

  • Page 5: Caution

    Iii for safety in this manual, important safety instructions are specially marked as shown below. To prevent the risk of death or injury to persons and severe damage to the unit or periph- eral equipment, make sure that all instructions are fully understood and observed. Caution important disregardi...

  • Page 6

    Iv www.64817.Com.

  • Page 7: Precautions

    V precautions z operate the unit only as described in this manual. Z take care not to drop the unit, and protect it from shocks and vibrations. Z do not store or use the unit in locations where the unit may be subject to - splashes of water or high levels of dust, - air with high salt or sulphur con...

  • Page 8: Contents

    Vi contents organization of this manual ....................................................... I for safety .......................................................................... Iii precautions .................................................................................V outline ............

  • Page 9

    Vii comparator ...............................................................................38 printer .......................................................................................43 serial interface .........................................................................47 transmission...

  • Page 10

    Viii www.64817.Com.

  • Page 11: Outline

    1 outline the vm-83 is a vibration meter designed for measurement and evaluation of vibrations, using a piezoelectric accelerometer or a servo accelerometer. It pro- vides four types of input connectors and allows selection of acceleration, veloc- ity, and displacement measurement. With the optional...

  • Page 12

    2 outline block diagram www.64817.Com.

  • Page 13: Controls and Features

    3 v i b r a t i o n m e t e r h p f l p f l e v e l r a n g e c a l l i g h t p o w e r p i c k u p s e n s a c c / v e l / d i s p h p f l p f m e n u c o m p o n / o f f h o l d r e s e t m a x h o l d o n / o f f r m s / e q p e a k / e q p - p o n p i c k u p v m - 8 3 l e v e l r a n g e k e y ...

  • Page 14: Menu Key

    4 controls and features menu key allows changing the menu by selecting a menu number. If this key is pressed in remote control mode, the remote mode is canceled and the unit returns to the local mode. Power switch serves to turn the unit on and off. Comp on/off key serves to turn the comparator func...

  • Page 15: Rear Panel

    5 controls and features rear panel battery holder four iec r14 (size c) batteries are inserted here. Battery holder button push this button to lock or unlock the battery holder. Ac output connector an ac signal corresponding to the measurement value is available at this connector (full-scale point: ...

  • Page 16: Comparator Output Terminals

    6 controls and features comparator output terminals the comparator signal is available at these terminals. The maximum applied voltage is 24 v, and the maximum drive current varies as follows depending on the impressed voltage. 50 ma (when the impressed voltage is 24 v) 25 ma (when the impressed vol...

  • Page 17: Side Panel

    7 controls and features side panel g r i p p r o p - u p f e e t f e e t.

  • Page 18: P C /

    8 controls and features c o m p r e m o t e o v e r u n d e r c a l p e a k m a x h o l d o v e r r m s e q p e a k e q p - p h z k h z p c / m m / s 2 2 4 6 8 1 2 3 0 c o m p i n d i c a t o r r e m o t e i n d i c a t o r o v e r i n d i c a t o r u n i t s i n d i c a t o r l o w - p a s s f i l ...

  • Page 19: Units Indicator

    9 controls and features units indicator the measurement unit applicable to the current measurement mode is shown here. M/s 2 when a piezoelectric accelerometer is used, this indicator ap- pears during acceleration measurement. Mm/s 2 when a servo accelerometer is used, this indicator appears during ...

  • Page 20: Under Indicator

    10 controls and features s u f f i c i e n t r e m a i n i n g c a p a c i t y b a t t e r i e s l o w f l a s h i n g r e p l a c e b a t t e r i e s under indicator this indicator appears when the input signal has fallen below the measure- ment threshold. Battery capacity indicator shows the remai...

  • Page 21: Preparations

    11 v m - 8 3 b a t t e r y h o l d e r preparations power supply this unit can be operated either on four iec r14 (size c) batteries or an ac adapter (option). Inserting batteries unlock the battery holder by pressing the battery holder button and pull out the battery holder. After replacing the bat...

  • Page 22: Battery Life

    12 preparations s u f f i c i e n t r e m a i n i n g c a p a c i t y b a t t e r i e s l o w f l a s h i n g r e p l a c e b a t t e r i e s battery life alkaline batteries lr14 approx. 20 hours manganese batteries r14p approx. 9 hours * the above values were determined under the following conditio...

  • Page 23: Using The Prop-Up Feet

    13 preparations d o n o t p u s h p r o p - u p f e e t using the prop-up feet the unit can be tilted by flipping out the prop-up feet. Tilt the feet until they snap in place. Important when using the prop-up feet, do not place ob- jects on top of the vm-83 and do not push down on the unit..

  • Page 24: Selecting An Accelerometer

    14 preparations selecting an accelerometer the vm-83 can use piezoelectric accelerometer or servo accelerometer. Select the type of accelerometer according to the intended measurement range vibra- tion frequency, environmental conditions, and other related factors. - some major piezoelectric acceler...

  • Page 25: Connecting The Accelerometer

    15 preparations p r e a m p 2 s e r v o ( l s - 1 0 c ) s e r i a l p r e a m p 1 p r e a m p 1 p i c k u p l o c k i n p u t c a b l e ( v p - 5 1 s e r i e s ) p r e a m p l i f i e r c a b l e ( e c - 0 2 s e r i e s ) v m - 8 3 r e a r p a n e l a c c e l e r o m e t e r a c c / v e l / d i s p ...

  • Page 26

    16 preparations p r e a m p 2 s e r v o ( l s - 1 0 c ) s e r i a l p r e a m p 1 p r e a m p 1 p i c k u p l o c k i n p u t p i c k u p c a b l e ( v p - 5 1 s e r i e s ) v m - 8 3 r e a r p a n e l a c c e l e r o m e t e r p r e a m p 2 s e r v o ( l s - 1 0 c ) s e r i a l p r e a m p 1 p i c ...

  • Page 27: Note

    17 preparations setting the input select switch set the input select switch as required for the type of input that is being used. Accelerometer : signal from accelerometer connector on front panel preamp1 : signal from preamp 1 connector on rear panel preamp2 : signal from preamp 2 connector on rear...

  • Page 28: Important

    18 preparations accelerometer sensitivity calibration important different accelerometers have different sensi- tivity. Be sure to perform sensitivity calibration. Sensitivity calibration 1. Set the input select switch as required. 2. Set the power switch to on. 3. Press the accelerometer sens key on...

  • Page 29

    19 preparations 4. Use the setting keys ( , ) to set the display indication to the value indi- cated as charge sensitivity on the calibration chart of the accelerometer. When an accelerometer with integrated preamplifier is used, enter the voltage sensitivity. For example, when the voltage sensitivi...

  • Page 30: Measurement

    20 measurement power-on when the unit is turned on, the same settings as used before the unit was turned off are reestablished (resume function), and measurement starts. The level range, high-pass filter setting, low-pass filter setting, and display characteristics are memorized for each measurement...

  • Page 31: Measurement Mode Setting

    21 measurement measurement mode setting select the measurement mode from acc (acceleration), vel (velocity), or disp (displacement). Setting procedure 1. Press the acc/vel/disp key. (the indicator above the key lights up.) 2. Use the setting keys ( , ) to select from acc → vel → disp. Acc (accelerat...

  • Page 32: Setting Procedure

    22 measurement display characteristics setting select the display (detection) characteristics from rms, eqpeak, or eqp-p. Setting procedure 1. Press the rms/peak/p-p key. (the indicator above the key lights up.) 2. Use the setting keys ( , ) to select from rms → eqpeak → eqp-p. Rms : effective value...

  • Page 33: High-Pass Filter Setting

    23 measurement high-pass filter setting setting procedure 1. Press the hpf key. (the indicator above the key lights up.) 2. Use the setting keys ( , ) to select the filter setting. The available set- tings are listed below. Piezoelectric accelerometer 1 hz, 3 hz, 10 hz, 20 hz, 50 hz, -- (off; acc on...

  • Page 34: Low-Pass Filter Setting

    24 measurement low-pass filter setting setting procedure 1. Press the lpf key. (the indicator above the key lights up.) 2. Use the setting keys ( , ) to select the filter setting. The available set- tings are listed below. Piezoelectric accelerometer 100 hz, 300 hz, 1 khz, 3 khz, 10 khz, -- (off; ac...

  • Page 35: Level Range Setting

    25 measurement level range setting set the level range as follows. Use the setting keys ( , ) to select an appropriate level range. The relationship between input select switch, accelerometer sensitiv- ity, measurement mode, and hpf is shown in the table on the next page. 2 4 6 8 1 2 3 0

  • Page 36

    26 measurement - when input select switch is set to accelerometer, preamp 1, or preamp 2 (*0 hpf: 1 hz; *1 hpf: 3 hz; *2 hpf: 10 hz) sensitivity measurement level range mode 0.030 acc 3 10 30 100 300 1000 3000 10000 vel 30 100 300 1000 3000 10000 - - 0.999 disp* 0 - 10 30 100 300 1000 3000 10000 pc/...

  • Page 37: Menu Settings

    27 measurement menu settings the settings for the serial interface, printer, peak hold function, and comparator function are made via menus. 1. Call up the menu screen. Note if one of the keys cal, comp on/off, or max hold on/off is set to on, the menu screen will not appear. V i b r a t i o n m e t...

  • Page 38: Note

    28 measurement 2. When the menu key is pressed, a menu screen as shown below appears. With each push of the menu key, the menu number cycles through 0 → 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → measurement screen. 3. Select the number of the desired menu, and use the setting keys ( , ) to change the displaye...

  • Page 39

    29 measurement menu 2 serial interface id number 2- choose a setting from 0 to 15. Menu 3 peak hold function on/off 3-0 peak hold function off 3-1 peak hold function on menu 4 comparator function and comparator level sets the comparator function and chooses a level between 0 and 98% of the full-scal...

  • Page 40: Note

    30 measurement menu 8 comparator output buzzer this controls buzzer use for the comparator function. When enabled, the buzzer sounds while the comparator output is active. When dis- abled, there is no buzzer sound also when the comparator output is active. 8-0 buzzer disabled 8-1 buzzer enabled note...

  • Page 41: Calibration

    31 measurement calibration when using external equipment to record the ac output signal or dc output signal of the vm-83, perform calibration as follows. In the cal (calibration) state, the range full-scale signal is output from the ac output and dc output. V i b r a t i o n m e t e r h p f l p f l ...

  • Page 42: Note

    32 measurement (1) when input select switch on rear panel is set to accelerom- eter, preamp 1, or preamp 2 ac output (ac out) : 80 hz, 2 v* dc output (dc out) : 2 v (2) when input select switch on rear panel is set to servo or servo ac output (ac out) : 1 hz, 2 v * dc output (dc out) : 2 v pressing ...

  • Page 43: Maximum Value Hold

    33 measurement maximum value hold this function serves for memorizing the maximum measured value. Setting procedure 1. Press the max hold on/off key to set the function to on. 2. When the maximum hold function is on, the indication max hold appears on the display, and the indicated numeric value is ...

  • Page 44

    34 measurement 3. When the maximum hold value is higher than the overload threshold, the indication max hold over is shown. 4. The hold reset key can be used to reset the maximum hold value at any time. M a x h o l d e q p e a k h z k h z m 2 4 6 8 o v e r v i b r a t i o n m e t e r h p f l p f l e...

  • Page 45: Note

    35 measurement 5. Pressing the max hold key again turns the maximum hold mode off. The unit returns to normal measurement. Note while the maximum hold function is on, all con- trols except the light key, max hold on/off key, hold reset key, and power switch are inac- tive. The maximum hold function ...

  • Page 46: Peak Hold

    36 measurement peak hold the peak hold function uses 51.2 khz sampling on the vibration input signal to determine the peak value. Setting procedure 1. Use the menu key to call up menu 3. 2. Use the setting keys to select the setting 3-1 (peak hold on). 3. Return to the measurement screen. 4. When th...

  • Page 47: Note

    37 measurement note the peak hold function applies only to the numeric display. The bar graph indication continues to func- tion as during normal measurement. While the peak hold function is on, all controls ex- cept the light key, menu key, hold reset key, and power switch are inactive. Turning the...

  • Page 48: Comparator

    38 comparator comparator operation the comparator works by constantly monitoring the measured vibration level and comparing it to a preset reference level (comparator level). If the compara- tor level is exceeded, the comparator output becomes active (open collector circuit, lcd flashing, buzzer sou...

  • Page 49: Comparator Level

    39 comparator while comparator function is operating, the comp indicator is shown. In the bar graph indication, the bar corresponding to the comparator reference level remains constantly on. Comparator level the comparator level is the threshold where the comparator output becomes active. This setti...

  • Page 50: Auto Reset Function

    40 comparator auto reset function the auto reset function is controlled with menu screen 6 (see "menu settings" on page 27). When the function is set to on and the vibration level has fallen again below the comparator level, the comparator output will automatically be reset (turned off) after the au...

  • Page 51: Operation

    41 comparator operation reset operation when the comparator output was activated, it can be reset in three ways. (1) auto reset as described above, when auto reset is on, the comparator output will be turned off automatically after activation when the auto reset time has elapsed. (2) hold reset key ...

  • Page 52: Comparator Output

    42 comparator comparator output the comparator output has three elements. (1) buzzer is heard (long intermittent beeps). This applies only if the buzzer function has been set to on with menu 8. (2) lcd display flashes. Measurement value indicator section flashes in 0.5 second intervals. (3) open col...

  • Page 53: Activating Printer Operation

    43 you can connect an optional printer to produce hard copy of measurement re- sults. The following printers are compatible with the vm-83: cp-10, cp-11, dpu-414 activating printer operation 1. Turn power to the vm-83 and the printer off. 2. Use a separately purchased cable to connect the serial int...

  • Page 54: Stopping Printer Operation

    44 printer stopping printer operation 1. Using the menu screens, select the menu setting 0-0. 2. Disconnect the cable. Note printer operation is paused during calibration, com- parator operation, sensitivity setting, and while us- ing the menu screens. Dip switch settings for printers cp-11, cp-10 s...

  • Page 55

    45 printer dip switch settings for printer dpu-414 when connecting the printer dpu-414, set the dip switches 1 to 3 for the printer software as follows. For more information on making these settings, please refer to the instruction manual and the guide sheet of the dpu-414. Vibration meter vm-83 (96...

  • Page 56: Printout Sample

    46 printer printout sample a set of five measurement values for every 2 seconds is printed out every 10 seconds as one line. " " is used to indicate an over occurrence and "#" an under occurrence. A c c m / s s r m s f s 1 0 0 0 h p f 1 h z l p f 3 k h z = o v # = u n 2 4 3 1 3 0 1 6 2 # 2 # 1 2 7 1...

  • Page 57: Serial Interface

    47 serial interface the vm-83 incorporates a serial interface that can be used to set measurement parameters and control measurement using commands sent from a computer. Measurement results can also be sent to the computer. Using sc-31m or sc-31s adapters (option), a single computer can be used to c...

  • Page 58: Local Mode/remote Mode

    48 serial interface local mode/remote mode z local mode in this mode, the controls on the panel of the vm-83 are used to operate the unit. Immediately after being turned on, the unit is always in local mode. Z remote mode in this mode, the vm-83 operates in response to commands sent from a computer....

  • Page 59: Preparation

    49 serial interface v m - 8 3 s c - 3 1 s v m - 8 3 s c - 3 1 s v m - 8 3 s c - 3 1 s v m - 8 3 s c - 3 1 s s c - 3 1 m c o m p u t e r v m - 8 3 s e r i a l c o m p u t e r s e r i a l i n t e r f a c e c o n n e c t o r 9 - p i n d - s u b p l u g , f e m a l e c r o s s - w i r e d s e r i a l c ...

  • Page 60: Note

    50 serial interface 3. Set the power switch of the vm-83 to on. 4. Make the required menu settings at the vm-83. For details, please refer to "menu settings" on page 27. Menu 0-1 menu 1-96 or 1-19 set transfer rate. Menu 2- set id number. Note id number the id number serves to identify the vm-83 uni...

  • Page 61: Transfer Protocol

    51 serial interface transfer protocol sending of commands in order to control the vm-83 from a computer or to retrieve measurement data, certain commands must be sent to the vm-83. The data exchange must be per- formed according to certain rules, to ensure that both the vm-83 and the com- puter reco...

  • Page 62

    52 serial interface ** is the id number. Ack> : control code 06 h (acknowledge) cr> : control code 0d h (carriage return) lf> : control code 0a h (line feed) eot> : control code 04 h (end of transfer) ready : ascii string (command) : ascii string (command and parameters) (data) : ascii string (data ...

  • Page 63: Error Processing

    53 serial interface error processing in order to ensure correct data exchange between the vm-83 and the computer, the rules described above must be observed. If an error occurs, the following steps should be taken. - the computer has sent rmt1**cr>lf> but the remote indicator on the vm-83 does not l...

  • Page 64: Command Format

    54 serial interface command format commands that can be used by the vm-83 consist of 3 characters (3 bytes), usually followed by a parameter which specifies the action range of the com- mand. There are two types of parameters: - parameters for changing function settings - parameter for requesting da...

  • Page 65: Command List

    55 serial interface command list command function see page rmt n1 n2 n3 select local mode/remote mode 56 rmt? Get id number and remote mode status 56 rng n set level range 56 unt n set measurement mode 57 det n set display characteristics 58 sns n1 n2 n3 n4 set sensitivity 58 lpf n set low-pass filt...

  • Page 66: Commands

    56 serial interface commands rmt n1 n2 n3 select local mode/remote mode n1 = 0 local mode n1 = 1 remote mode n2 n3 = 00 to 15, ff sets id number. Vm-83 specified by id number receives the command. Ff specifies all connected vm-83. Rmt? Get id number and remote mode status output data format p1 p2 p3...

  • Page 67

    57 serial interface - when input select is set to accelerometer, preamp1, preamp2 (*0 = hpf 1 hz, *1 = hpf 3 hz, *2 = hpf 10 hz and higher) sensitivity measurement n =0 n = 1 n = 2 n = 3 n = 4 n = 5 n = 6 n = 7 mode 0.030 acc 3 10 30 100 300 1000 3000 10000 vel 30 100 300 1000 3000 10000 - - 0.999 d...

  • Page 68

    58 serial interface det n set display characteristics n = 0 rms n = 1 eqpeak n = 2 eqp-p sns n1 n2 n3 n4 set sensitivity n1 to n3 : set sensitivity to 030 to 999 n4 = 0 : set sensitivity to 1/10 of value specified with n1 to n3 n4 = 1 : set sensitivity to 1/100 of value specified with n1 to n3 n4 = ...

  • Page 69

    59 serial interface lpf n set low-pass filter setting command action depends in input select switch setting. Piezoelectric accelerometer : accelerometer, preamp1, preamp2 servo accelerometer : servo , servo piezoelectric servo n = 0 100 50 n = 1 300 100 n = 2 1 k 100 n = 3 3 k 100 n = 4 10 k 100 n =...

  • Page 70

    60 serial interface cal n set calibration mode. N = 0 calibration off n = 1 calibration on cal? Get calibration mode status output data format peot>cr>lf> p = 0 calibration off p = 1 calibration on bat? Get battery capacity status output corresponds to status of battery capacity indicator on display...

  • Page 71: Note

    61 serial interface * when operating in maximum hold mode, returned value corresponds to max hold value. Same applies to peak hold mode. When this command is received while there is no display indication, output will be p1 to p4 = 0000. Dof n output instantaneous value every 0.1 seconds in non-pro- ...

  • Page 72

    62 serial interface max n set maximum hold function to on/off n = 0 maximum hold off n = 1 maximum hold on max? Get maximum hold function status output data format peot>cr>lf> p = 0 maximum hold off p = 1 maximum hold on pek n set peak hold function to on/off n = 0 peak hold off n = 1 peak hold on p...

  • Page 73

    63 serial interface cms n1 n2 n3 n4 n5 n6 n7 make comparator function settings n1 to n2 : comparator level 00 to 98 (steps of 2) n3 : delay time 0 to 9 n4 = 0 : auto reset off n4 = 1 : auto reset on n5 to n6 : auto reset time 00 to 90 (steps of 10) n7 = 0 : buzzer off n7 = 1 : buzzer on for items th...

  • Page 74

    64 serial interface sts? Get setting information output data format p1 p2 p3 p4 p5 p6 p7 p8 p9 p10eot>cr>lf> p1 : input select 0 to 4 p1 = 0 : accelerometer in- put p1 = 1 : preamp 1 input p1 = 2 : preamp 2 input p1 = 3 : servo input p1 = 4 : servo input p2 : level range 0 to 7 (rng n) p3 : measurem...

  • Page 75

    65 serial interface allowable remote mode commands in various operation conditions  indicates that command is allowed (valid). × indicates that command is not allowed (invalid). Command normal calibration comparator maximum peak dof explanation measurement hold hold operation rmt n1n2n3 cancel remo...

  • Page 76: Note

    66 serial interface v m - 8 3 s c - 3 1 s v m - 8 3 s c - 3 1 s v m - 8 3 s c - 3 1 s v m - 8 3 s c - 3 1 s s c - 3 1 m c o m p u t e r communication with multiple units using sc-31m/sc-31s using the optional sc-31m/sc-31s adapters, it is possible to connect up to 16 vm-83 units to a single computer...

  • Page 77: Note

    67 serial interface sending a command to a single unit to send a command to a single unit when multiple units are connected, the same procedure as for one-on-one communication is used. 1. Verify that all connected vm-83 units are set to local mode. 2. Send the rmt1**cr>lf> command, where ** is the i...

  • Page 78: Note

    68 serial interface sending a command to all connected units when sending commands to all connected units, only commands for changing settings are allowed. To address a command to all units, set all units to remote mode by sending the rmt1ff command. Note that a vm-83 that has received the rmt1ff co...

  • Page 79: Technical Information

    69 technical information noise level and measurement range (1) noise level using accelerometer input and sensitivity 5.00 pc/(m/s 2 ) measurement measurement hpf lpf display noise level mode range characteristics acceleration 0.3 --- --- rms 0.004 m/s 2 velocity 3 1 hz --- rms 0.1 mm/s displacement ...

  • Page 80

    70 technical information (3) measurement range with servo accelerometer ls-10c acceleration measurement range 0 . 1 0 . 2 0 . 5 1 2 5 1 0 2 0 5 0 1 0 0 2 0 0 5 0 0 1 0 0 0 2 0 0 0 5 0 0 0 0 . 0 1 0 . 0 2 0 . 0 5 0 . 1 0 . 2 0 . 5 1 2 5 1 0 0 . 0 1 0 . 0 2 0 . 0 5 2 0 5 0 1 0 0 2 0 0 5 0 0 1 0 0 0 1 ...

  • Page 81

    71 technical information velocity measurement range.

  • Page 82

    72 technical information displacement measurement range 0 . 1 0 . 2 0 . 5 1 2 5 1 0 0 . 0 1 0 . 0 2 0 . 0 5 2 0 5 0 1 0 0 2 0 0 5 0 0 1 0 0 0 1 0 0 5 0 2 0 1 0 5 2 1 0 . 5 0 . 2 0 . 1 0 . 0 5 0 . 0 2 0 . 0 1 0 . 0 0 5 0 . 0 0 2 0 . 0 0 1 0 . 0 0 0 5 0 . 0 0 0 2 0 . 0 0 0 1 0 . 2 5 3 m m 1 . 5 9 h z ...

  • Page 83: Group Delay

    73 technical information 8 0 70 78 .5 61 .5 4 - m 3 f r o n t u n i t : m m v m - 8 3 b o t t o m group delay the vm-83 directly converts the vibration input signal from analog into digital form and performs signal processing in the digital domain, using a dsp. The signal is then reconverted to anal...

  • Page 84: Accelerometer Installation

    74 technical information accelerometer installation the accelerometer can be mounted to the measurement object in one of the four general ways outlined below. The accelerometer mounting method greatly af- fects the contact resonance frequency *. The advantages and disadvantages of various methods ar...

  • Page 85

    75 technical information * contact resonance frequency contact resonance occurs when the area the mounted accelerometer con- tacts the measurement object becomes temporarily deformed, causing it to act like a spring. This spring and the accelerometer mass then form a system that vibrates at a certai...

  • Page 86: Display Range

    76 technical information display range this section provides information on the numeric range of the digital display used in the vm-83. For simplification, the range is assumed to be "100" and "30", and the display characteristics setting eq peak. Because the overload point of this unit is approxima...

  • Page 87: Aliasing Effect

    77 technical information aliasing effect the vm-83 directly converts the vibration input signal from analog into digital form and performs signal processing in the digital domain, using a dsp. This principle is subject to the so-called aliasing effect. An anti-aliasing filter (ana- log low-pass filt...

  • Page 88: Filter Characteristics

    78 technical information filter characteristics piezoelectric accelerometer high-pass filter low-pass filter the above specifications are a representative example for ac output. 1 2 5 1 0 2 0 5 0 1 0 0 1 0 0 - 1 0 - 2 0 - 3 0 - 4 0 - 5 0 0 . 0 1 0 . 0 2 0 . 0 5 0 . 1 0 . 2 0 . 5 o f f 1 h z 3 h z 1 ...

  • Page 89: Servo Accelerometer Ls-10C

    79 technical information servo accelerometer ls-10c high-pass filter low-pass filter the above specifications are a representative example for ac output. 1 2 5 1 0 1 0 0 - 1 0 - 2 0 - 3 0 - 4 0 - 5 0 0 . 0 1 0 . 0 2 0 . 0 5 0 . 1 0 . 2 0 . 5 0 . 3 h z 1 h z 0 . 1 h z r es po ns e (d b ) f r e q u e ...

  • Page 90: Vm-83Pb1 Software

    80 technical information vm-83pb1 software vm-83pb1 is a software package for microsoft windows 95, 98, 98se, me, 2000, xp and microsoft windows nt4.0 which allows controlling settings and measurement operation of the vm-83 from the computer, via the serial port. Measurement data downloaded from the...

  • Page 91: Specifications

    81 specifications input section (1) accelerometer input for piezoelectric accelerometer (microdot connector) maximum input charge 30000 pc (2) preamp 1 input for piezoelectric accelerometer via preamplifier vp-26a (7-pin female connector prc-03) (3) preamp 2 input for piezoelectric accelerometer wit...

  • Page 92

    82 specifications - accelerometer sensitivity 1.00 to 9.99 pc/(m/s 2 ) acceleration 0.3, 1, 3, 10, 30, 100, 300, 1000 m/s 2 velocity 3, 10, 30, 100, 300, 1000 mm/s displacement 1, 3, 10, 30, 100, 300, 1000 mm (hpf 1 hz) displacement 0.3, 1, 3, 10, 30, 100, 300, 1000 mm (hpf 3 hz) displacement 0.03, ...

  • Page 93

    83 specifications filters piezoelectric accelerometer hpf off, 1, 3, 10, 20, 50 hz (-10% point), selectable lpf off, 100, 300, 1 k, 3 k, 10 khz (-10% point), selectable servo accelerometer hpf 0.1, 0.3, 1 hz, selectable lpf 50, 100 hz, selectable display (detection) characteristics effective value (...

  • Page 94: P C /

    84 specifications display functions (1) bar graph, linear scale, 100 ms sampled value 0 to 3.16 0 to 10 (2) 4-digit numeric display; arithmetic average of 20 instantaneous values taken at 100 ms intervals, updated every 2 seconds (3) measurement mode, display characteristics, filter (4) battery stat...

  • Page 95

    85 specifications outputs (1) ac output; full-scale 2 v, output impedance 600 Ω, bnc connector load impedance: 10 k Ω or higher output voltage accuracy piezoelectric (unit electrical characteristics, 80 hz) velocity: range full-scale ±2% acceleration: range full-scale ±3% displacement: range full-sc...

  • Page 96

    86 specifications noise level (1) noise level with accelerometer input, sensitivity 5.00 pc/(m/s 2 ) measurement measurement hpf lpf display noise level mode range characteristics acceleration 0.3 --- --- rms 0.004 m/s 2 velocity 3 1 hz --- rms 0.1 mm/s displacement 1 1 hz --- rms 0.015 mm displacem...

  • Page 97

    87 specifications (3) measurement range with servo accelerometer ls-10c acceleration measurement range 0 . 1 0 . 2 0 . 5 1 2 5 1 0 2 0 5 0 1 0 0 2 0 0 5 0 0 1 0 0 0 2 0 0 0 5 0 0 0 0 . 0 1 0 . 0 2 0 . 0 5 0 . 1 0 . 2 0 . 5 1 2 5 1 0 0 . 0 1 0 . 0 2 0 . 0 5 2 0 5 0 1 0 0 2 0 0 5 0 0 1 0 0 0 1 0 0 0 0...

  • Page 98

    88 specifications velocity measurement range.

  • Page 99

    89 specifications displacement measurement range 0 . 1 0 . 2 0 . 5 1 2 5 1 0 0 . 0 1 0 . 0 2 0 . 0 5 2 0 5 0 1 0 0 2 0 0 5 0 0 1 0 0 0 1 0 0 5 0 2 0 1 0 5 2 1 0 . 5 0 . 2 0 . 1 0 . 0 5 0 . 0 2 0 . 0 1 0 . 0 0 5 0 . 0 0 2 0 . 0 0 1 0 . 0 0 0 5 0 . 0 0 0 2 0 . 0 0 0 1 0 . 2 5 3 m m 1 . 5 9 h z 0 . 0 0...

  • Page 100

    90 specifications ambient conditions for operation -10 to +50°c, 20 to 90% rh (no condensation) power requirements iec r14 (size c) batteries(×4) or ac adapter (option) current consumption approx. 190 ma (6 v dc) (*1) approx. 60 ma (using ac adapter) (*1, *2) battery life for continuousoperation alk...

  • Page 101

    91 specifications supplied accessories carrying case 1 iec r14 (size c) batteries 4 instruction manual 1 inspection certificate 1 optional accessories ac adapter nc-98 (100 to 240 v) piezoelectric accelerometer vibration meter preamplifier vp-26a vibration level meter accelerometer cable ec-02 serie...

  • Page 102

    92 specifications unit: mm dimensional drawing v i b r a t i o n m e t e r h p f l p f l e v e l r a n g e 15 0 1 2 0 2 1 0 2 3 4 17 1 c a l l i g h t p o w e r p i c k u p s e n s a c c / v e l / d i s p h p f l p f m e n u c o m p o n / o f f h o l d r e s e t m a x h o l d o n / o f f r h s / e q...

  • Page 103: Index

    93 index a ac adapter ........................................ 12 ac output connector .......................... 5 acceleration measurement range .................................................. 70, 87 accelerometer ............................ 14, 74 accelerometer input ............. 81 accelerom...

  • Page 104

    94 index e equivalent peak ............................ 8, 22 equivalent peak-to-peak ............... 8, 22 error processing .............................. 53 external power supply connector .................................................... 5, 12 f feet ..............................................

  • Page 105

    95 index power requirements ......................... 90 power switch...................................... 4 preamp 1 input ............................. 81 preamp 2 input ............................. 81 preamplifier ..................................... 15 preamplifier 1 input connector ............

  • Page 106

    No. 31185 06-06 printed in japan.