Rion VM-83 User manual

INSTRUCTION MANUAL
Vibration Meter
VM-83
3-20-41 Higashimotomachi, Kokubunji, Tokyo 185-8533, Japan
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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 on the configuration and features of the unit, and con-
tains a block diagram.
Controls and Features
Briefly identifies and explains all parts of the unit.
Preparations
Describes installation, connections, inserting batteries, pre-use checks and other
steps.
Measurement
Describes the steps for measurement.
Comparator
Describes how to use the comparator function.
Printer
Gives information on a printer that can be connected to the unit.
Serial Interface
Describes how to use the serial interface for connection to a computer.
Technical Information
Provides additional information that is helpful for using the unit.
Specifications
Lists the technical specifications of the unit.
Index
Index to the contents of the manual.
All company names and product names mentioned in this manual are trademarks or registered
trademarks of their respective owners.
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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 European standards;
EN 61000-6-3:2001
EN 61000-6-1:2001
*EN 61000-6-2:2001
Note: CE requirements are met provided that a core filter is fitted
to every cable.
*The measurement result may be influenced when the instrument is
used in a radio-frequency electromagnetic (RFE) field.
To conform to the EU requirement of the Directive
2002/96/EC on Waste Electrical and Electronic
Equipment, the symbol mark on the right is shown
on the instrument.
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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 Disregarding instructions
printed here incurs the risk of
damage to the product.
Disregarding instructions
printed here incurs the risk of
injury to persons and/or dam-
age to peripheral equipment.
Mentioned about the tips to use
this unit properly. (This mes-
sages do not have to do with
safety.)
Note
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Precautions
zOperate the unit only as described in this manual.
zTake care not to drop the unit, and protect it from shocks and vibrations.
zDo 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 content, or other gases or chemicals,
- high temperature or humidity (above 50°C, 90% RH), or direct sun-
light,
- directly transmitted vibrations or shock.
zObserve the following precautions after using the unit:
- Always switch off the power.
- When the unit is not to be used for an extended period, remove the
batteries to prevent possible damage caused by battery leakage.
zDo not disassemble the unit or attempt internal alterations.
zHave the unit checked and serviced regularly. (Sensitivity calibration
can be performed at the factory for a fee.)
zWhen powering the unit externally, use only the specified AC adapter
(option). Using a different adapter may cause malfunction or damage.
zDo not tap the LCD panel for example with your finger or a pen, to
prevent possible malfunction or damage.
zIn case of malfunction, do not attempt any repairs. Note the condition of
the unit clearly and contact the supplier.
zWhen disconnecting cables, always hold the plug and do not pull the
cable. Do not apply excessive force.
zWhen disposing of the unit or the accessories, follow national and local
regulations regarding waste disposal.
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Contents
Organization of this manual ....................................................... i
FOR SAFETY .......................................................................... iii
Precautions .................................................................................v
Outline ........................................................................................ 1
Controls and Features ................................................................. 3
Front Panel ............................................................................3
Rear Panel..............................................................................5
Side Panel ..............................................................................7
Display ...................................................................................8
Preparations .............................................................................. 11
Power Supply....................................................................... 11
Inserting Batteries ................................................................ 11
AC Adapter..........................................................................12
Using the Prop-up Feet ........................................................13
Selecting an Accelerometer ................................................. 14
Connecting the Accelerometer ............................................15
Setting the INPUT SELECT Switch ...................................17
Accelerometer Sensitivity Calibration ................................ 18
Measurement ............................................................................20
Power-On.............................................................................20
Measurement Mode Setting.................................................21
Display Characteristics Setting............................................22
High-Pass Filter Setting ....................................................... 23
Low-Pass Filter Setting .......................................................24
Level Range Setting ............................................................25
Menu Settings ......................................................................27
Calibration ...........................................................................31
Maximum Value Hold ......................................................... 33
Peak Hold ............................................................................36
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Comparator ............................................................................... 38
Printer .......................................................................................43
Serial Interface .........................................................................47
Transmission Principle ........................................................47
Local Mode/Remote Mode ..................................................48
Transfer Protocol .................................................................51
Error Processing .................................................................. 53
Control Operation in Remote Mode .................................... 53
Command Format ................................................................54
Communication with Multiple Units using SC-31M/SC-31S ...... 66
Technical Information ..............................................................69
Noise Level and Measurement Range .................................69
Group Delay ........................................................................73
Rack Mounting ....................................................................73
Accelerometer Installation ................................................... 74
Display Range .....................................................................76
Aliasing Effect .....................................................................77
Filter Characteristics ............................................................ 78
VM-83PB1 Software ........................................................... 80
Specifications ...........................................................................81
Index ........................................................................................93
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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 servo accelerometer, even
very low frequency vibrations in the range of 0.1 to 1 Hz can be measured,
something that is very hard to achieve with conventional piezoelectric acceler-
ometers.
Display characteristics can be switched to rms, equivalent peak, and equivalent
peak-to-peak. Peak hold and max. hold functions are also available, and a com-
parator with level evaluation output is also available.
AC output, DC output, and a serial interface are provided as standard equip-
ment.
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Outline
Block Diagram
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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
PEAK
/ 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 s
D i s p l a y b a c k l i g h t k e y
C a l i b r a t i o n k e y
M E N U k e y
P o w e r s w i t c h
C O M P O N O F F k e y
H O L D R E S E T k e y
L o w - p a s s f i l t e r k e y
M A X H O L D O N O F F k e y
H i g h - p a s s f i l t e r k e y
S e t t i n g k e y s
M e a s u r e m e n t m o d e
s e l e c t o r k e y
D i s p l a y c h a r a c t e r i s t i c s
s e l e c t o r k e y
D i s p l a y
A c c e l e r o m e t e r
s e n s i t i v i t y k e y
A c c e l e r o m e t e r
i n p u t c o n n e c t o r
Controls and Features
Front Panel
LEVEL RANGE keys
Serve for switching the level range up ( ) or down ( ).
Display backlight key
Serves for turning the display backlight on and off.
When the unit is operating on batteries, the display automatically turns itself
off after 60 seconds. When the batteries are run down, the display will be
darker.
Calibration key (CAL key)
This key turns the calibration signal supplied at the AC and DC outputs on
and off. The signal is used to perform calibration of external equipment.
Accelerometer sensitivity key (PICKUP SENS key)
Serves for setting the accelerometer sensitivity. When the accelerometer sen-
sitivity setting mode is on, the indicator above the key lights.
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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 function on and off.
HOLD RESET key
Serves for resetting maximum hold data and peak hold data, as well as the
comparator output.
Low-pass filter key
Serves for activating the low-pass filter (indicator above the key lights).
MAX HOLD ON/OFF key
Serves to turn the maximum value hold function on and off.
High-pass filter key
Serves for activating the high-pass filter (indicator above the key lights).
Accelerometer input connector
The piezoelectric accelerometer is to be connected here.
Setting keys
Serve to set the measurement mode, display characteristics, low-pass filter,
high-pass filter, and accelerometer sensitivity. The keys will affect the func-
tion for which the key indicator is lit. The keys are also used for changing
menu settings.
Measurement mode selector key
Serves to change the measurement mode (indicator above the key lights).
Display characteristics selector key
Serves to change the display (detection) characteristics (indicator above the
key lights).
Display
Shows measurement values and various key settings.

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: 2 V, output impedance approx. 600 ohms).
DC output connector
A DC signal corresponding to the measurement value is available at this
connector (full-scale point: 2 V, output impedance approx. 600 ohms).
External power supply connector
The AC adapter (option) can be connected here.

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 voltage is 12 V)
10 mA (when the impressed voltage is 5 V)
Input select switch
Serves to select the input source. Available settings are ACCELEROMETER /
PREAMP 1 / PREAMP 2 / SERVO / SERVO .
Serial interface connector
Serves for connection of a computer or printer.
Servo input connector
The servo accelerometer (LS-10C or LS-20C) can be connected here.
Preamplifier 2 input connector
A piezoelectric accelerometer with integrated preamplifier can be connected
here.
Preamplifier 1 input connector
A piezoelectric accelerometer can be connected here via a preamplifier.

7
Controls and Features
Side Panel
G r i p
P r o p - u p f e e t
F e e t

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
268
12
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 t e r i n d i c a t o r
H i g h - p a s s f i l t e r
i n d i c a t o r
R M S E Q P E A K
E Q P - P i n d i c a t o r s
M e a s u r e m e n t v a l u e
P E A K
M A X H O L D
O V E R i n d i c a t o r s
B a r g r a p h
U N D E R i n d i c a t o r
B a t t e r y c a p a c i t y
i n d i c a t o r
C A L i n d i c a t o r
L e v e l r a n g e
i n d i c a t o r
Display
For explanation purposes, the illustration below shows all display elements.
In actual use, not all elements will be seen together.
COMP indicator
This indicator appears when the comparator function is used.
REMOTE
This indicator appears when the unit is being controlled remotely over the
serial link.
OVER indicator
This indicator appears when the input signal has caused overload.

9
Controls and Features
Units indicator
The measurement unit applicable to the current measurement mode is shown
here.
m/s2When a piezoelectric accelerometer is used, this indicator ap-
pears during acceleration measurement.
mm/s2When a servo accelerometer is used, this indicator appears
during acceleration measurement.
mm/s This indicator appears during velocity measurement.
mm This indicator appears during displacement measurement.
pC/(m/s2) This indicator appears during sensitivity setting for the pi-
ezoelectric accelerometer.
Low-pass filter indicator
Shows the low-pass filter setting.
High-pass filter indicator
Shows the high-pass filter setting.
RMS/EQ PEAK/EQ P-P indicators
Shows the display (detection) characteristics setting.
Measurement value
Shows the current measurement value, maximum hold value, peak hold value,
menu settings, etc.
PEAK/MAX HOLD/OVER indicators
When the maximum hold function has been activated, the MAX HOLD in-
dicator is displayed.
When the peak hold function has been activated, the PEAK HOLD indicator
is displayed.
When the hold value has exceeded the measurement maximum, the OVER
indicator is displayed.
Bar graph
When the level range setting is 10000, 1000, 100, 10, 1, 0.1, or 0.01, the
indication follows the upper scale: 0, 2, 4, 6, 8, 10.
When the level range setting is 3000, 300, 30, 3, 0.3, 0.03, or 0.003, the
indication follows the lower scale: 0, 1, 2, 3.
The bar graph indication corresponds to the input level.

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 remaining capacity of the batteries.
CAL indicator
This indicator appears during calibration.
Level range indicator
Shows which level range has been selected.