MRC PVB-820 User manual

Acceleration, Velocity
RMS measurement, Metric & Imperial unit
PEN VIBRATION METER
Model : PVB-820
Your purchase of this PEN
VIBRATION METER marks
a step forward for you into
the field of precision
measurement. Although
this METER is a complex
and delicate instrument, its
durable structure will allow
many years of use if
proper operating
techniques are developed.
Please read the following
instructions carefully and
always keep this manual
within easy reach.
OPERATION MANUAL
3, Hagavish st. Israel 58817 Tel: [phone], Fax: [phone]
[email protected]
MRC.7.20

TABLE OF CONTENTS
1 FEATURES................................................................
.
1
2 SPECIFICATIONS......................................................
.
2
2-1 General Specifications..........................................2
2-2 Electrical Specifications........................................3
3 FRONT PANEL DESCRIPTION.....................................5
3-1 Display...............................................................
.
5
3-2 Power Button...................................................... 5
3-3 Hold Button .......................................................
.
5
3-4 Function Button ..................................................5
3-5 Battery Cover/Compartment.................................5
3-6 Vibration Sensor..................................................5
3-7 Sensin
g
head......................................................
.
5
3-8 Ma
g
netic base.....................................................5
4.MEASURING PROCEDURE.......................................... 6
5.ZERO ADJUSTMENT PROCEDURE...............................9
6. BATTERY REPLACEMENT...........................................10
7. CARRYING CASE ( included ).....................................10
8. CLASSIFICATION RANGES.........................................11
9. SENSITIVITY RELATIVE TABLE ACCORDING
ISO 2954..................................................................12

1. FEATURES
*Applications for industrial vibration monitoring :
All industrial machinery vibrates. The level of vibration is
a useful guide to machine condition. Poor balance,
misalignment & looseness of the structure will cause the
vibration level increase, it is a sure sign that the
maintenance is needed.
* Pen type digital vibration meter, vibration sensor is built
in, all in one.
* Acceleration, Velocity measurement, RMS measurement
value.
* Metric & Imperial display unit
* Frequency range 10 Hz - 1 kHz, sensitivity relative meet
ISO 2954.
* Microcomputer circuit, intelligent function, high accuracy.
* LCD display, easy read out.
* Complete set with the Test pin and the Magnetic base
are the standard accessories.
* Built-in low battery indicator.
* Heavy duty & compact housing case.
* IP65 protection.
* Compact size, light weight.
* Soft carrying case is the optional accessory
1

2. SPECIFICATIONS
2-1 General Specifications
Display LCD, size : 20 mm x 28 mm.
Measurement Velocity, Acceleration.
* RMS value.
Function Acceleration
, g,
Velocity mm/s, cm/s, inch/s
Frequency 10 Hz to 1 KHz
range
* Sensitivity relative during the
the frequency range meet ISO 2954
Refer to table 1, page. 12.
Circuit Exclusive microcomputer circuit.
Zero adjust Build in the Zero adjustment VR,
easy to make adjustment.
Sampling time Approx. 1 second.
Operating 0 to 50 ( 32 to 122 ).℃℉
temperature
Operating Less than 80% RH.
humidity
Power supply DC 1.5V battery ( UM-4/AAA ) x 4 PCs.
Power Approx. DC 12 mA.
consumption
Weight 240 g ( 0.53 lb ).
Dimension Meter :
175 x 40 x 32 mm
( 6.9 x 1.6 x 1.3 inch ).
*Meter without sensing head,
Sensing head :
Round 9 mm Dia. x 30 mm.
Accessories Instruction manual.................. 1 PC.
included Meter with sensin
g
head.......... 1 Set
Ma
g
netic base......................... 1 PC.
Soft carryin
g
case, CA-52A......
.
1 PC.
2

2-2 Electrical Specifications
Acceleration ( RMS )
Unit
Range 0.5 to 199.9
Resolution 0.1
Accuracy ± ( 5 % + 2 d ) reading
@ 160 Hz, 80 Hz, 23 ± 5 ℃
Calibration
50 ( 160 Hz )
Point
Unit g @ 1 g = 9.8
Range 0.05 to 20.39 g
Resolution 0.01 g
Accuracy ± ( 5 % + 2 d ) reading
@ 160 Hz, 80 Hz, 23 ± 5 ℃
Calibration
50 ( 160 Hz )
Point
Unit
Range 2 to 656
Resolution 1
Accuracy ± ( 5 % + 2 d ) reading
@ 160 Hz, 80 Hz, 23 ± 5 ℃
Calibration
50 ( 160 Hz )
Point
3

Velocity ( RMS )
Unit mm/s
Range 0.5 to 199.9 mm/s
Resolution 0. 1 mm/s
Accuracy ± ( 5 % + 2 d ) reading
@ 160 Hz, 80 Hz, 23 ± 5 ℃
Calibration 50 mm/s ( 160 Hz )
Point
Unit cm/s
Range 0.05 to 19.99 cm/s
Resolution 0. 01 cm/s
Accuracy ± ( 5 % + 2 d ) reading
@ 160 Hz, 80 Hz, 23 ± 5 ℃
Calibration 50 mm/s ( 160 Hz )
Point
Unit inch/s
Range 0.02 to 7.87 inch/s
Resolution 0.01 inch/s
Accuracy ± ( 5 % + 2 d ) reading
@ 160 Hz, 80 Hz, 23 ± 5 ℃
Calibration 50 mm/s ( 160 Hz )
Point
4

3. FRONT PANEL & LAYOUT
DESCRIPTION
Fig. 1
3-1 Display
3-2 Power Button
3-3 Hold Button
3-4 Function Button
3-5 Battery Cover/Compartment
3-6 Vibration Sensor
3-7 Sensing Head
3-8 Magnetic Base
5

4. MEASURING PROCEDURE
1)Attaching Meter Body with the Sensing head
a. Connect (Screw )the " Sensing Head " ( 3-7, Fig. 1 to
the bottom of the " Vibration Sensor " ( 3-6, Fig. 1 ).
b. Hold the meter's body by hand loosely. Touch
the front pin of the "Sensing head " to the area
that you intend to measure the vibration value.
For best results: The Meter body
should be perpendicular with the
measurement surface area.
Measurement area
6

2)Cooperate with the Magnetic base
a. If the measuring surface is a ferrous material, you
may consider using the " Magnetic base " ( 3-8,
Fig. 1 )on the " Measurement area ", screw the "
Magnetic base " (3-8, Fig. 1) to the bottom of "
Vibration sensor " ( 3-6, Fig. 1 ).
For best results: The Meter body
should be perpendicular with the
measurement surface area.
Magnetic base
Measurement area
7

3)Function Selection
Select the desired function by pressing the " Function
Button " ( 3-4, Fig. 1 ) once the measurement
Function will be present in sequence.
Measurement Metric unit Imperial unit
Acceleration , g
Velocity mm/s, cm/s inch/s
The Display will show the indicator :
ACC ACC : Acceleration
ACC g VEL : Velocity
ACC
VEL mm/s
VEL cm/s
VEL inch/s
4)Power ON :
Power on the meter by pressing the " Power Button
" ( 3-2, Fig. 1 ) once, the LCD Display ( 3-1, Fig. 1 ) will
light up, the meter is ready for the measurement.
5)Data Hold :
During the measurement, push the "Hold button"
( 3-3, Fig. 1 ) to hold the measured value,
the LCD will indicate the " HOLD " symbol.
Push the " Data hold button " again to release the data
hold function and the " HOLD " symbol will be
removed.
8

5. ZERO ADJUSTMENT PROCEDURE
1)Open the " Battery Cover " ( 3-5. Fig. 1 ).
Use one finger to press the " Battery holder " to the
battery snap can contact the batteries completely.
2)Power on the meter by pressing the " Power Button "
( 3-2, Fig. 1 ) once.
3)There is an " Zero Adjust VR " near the battery
compartment,. Use the crew driver to adjust the " Zero
VR " until the Display show zero value ( not show the
minus symbol ), refer Fig, 2
Fig. 2
Zero adjust VR
9

6. BATTERY REPLACEMENT
1)When the LCD display shows
It is necessary to replace the battery. However, some
measurementsmay still be made for several hours after
Low Battery Indicator first appears,before the
instrument can become less accurate.
2)To replace the battery, rotate and remove the " Battery
Cover " ( 3-5, Fig. 1 ), take out the old batteries,
install new batteries, watching polarity.
DC 1.5V alkaline battery (UM-4/AAA) x 4 PCs.
7. CARRYING CASE ( included )
Soft carrying Size : 200 x 80 x 50 mm.
case
CA-52A
10

8. CLASSIFICATION RANGES
For the valuation of machines and equipment in the ISO
2372 and VDI 2056, four different kinds of machine groups
with four classification ranges and their limits for vibration
severity ( mm/s ) are determined.
The classifications for each machine group are specified as
follows :
Small machines, especially production electrical
motors of up to 15 KW ( Group K )
Good 0 to 0.71 mm/s
Acceptable 0.72 to 1.80 mm/s
Still permissible 1.81 to 4.5 mm/s
Dangerous > 4.5 mm/s
Medium sized machines, especially electrical
motors with 15 up to 75 KW output, without
special foundations ( Group M )
Good 0 to 1.12 mm/s
Acceptable 1.13 to 2.80 mm/s
Still permissible 2.81 to 7.1 mm/s
Dangerous > 7.1 mm/s
11

Large machines on heavy foundations ( Group G )
Good 0 to 1.80 mm/s
Acceptable 1.81 to 4.50 mm/s
Still permissible 4.51 to 11.2 mm/s
Dangerous > 11.2 mm/s
Largest machines and turbo machines with a
special foundations ( Group T ).
Good 0 to 2.80 mm/s
Acceptable 2.81 to 7.10 mm/s
Still permissible 7.11 to 18.0 mm/s
Dangerous > 18 mm/s
9. SENSITIVITY RELATIVE to the
reference sensitivity at 80 Hz ,
according ISO 2954
Frequency Normal Relative sensitivity
value Minimum Maximum
value value
10 Hz 1.0 0.8 1.1
20 Hz 1.0 0.9 1.1
40 Hz 1.0 0.9 1.1
80 Hz 1.0 1.0 1.0
160 Hz 1.0 0.9 1.1
500 Hz 1.0 0.9 1.1
1000 Hz 1.0 0.8 1.1
Table 1
12