Unit UT311 User manual

P/N:110401103774X
DATE:2018.06.26
REV.2

I. Introduction to UT311Product------------------------------------------------------------------------------1
II. Unpacking Inspection-----------------------------------------------------------------------------------------2
III. Safety Notices--------------------------------------------------------------------------------------------------2
IV. Instrument Structure------------------------------------------------------------------------------------------3
V. Instrument Setup and Operation--------------------------------------------------------------------------4
VI. Technical Indicators-------------------------------------------------------------------------------------------5
VII. Maintenance----------------------------------------------------------------------------------------------------7
CONTENTS

UT-311 vibration meter is a split portable vibration measurer which consists of acceleration
sensor and digital measurement display circuit. It is mainly used to measure vibration
displacement, speed (or intensity) and acceleration of mechanical equipment. Current status
(such as excellence, notice or danger) can be determined for equipment (such as fan, pump,
compressor and motor, etc) by above measuring data according to enterprise & machine
standards by comparing with national metrological verification regulations of JJG 676-2000
working vibration meter.
Such instrument has measuring value locking, low-voltage prompt and automatic shutdown
functions. With advantages such as wide measurement scope, simple operation and convenient
carrying, it can be used for patrol detection of equipment vibration in power, metallurgic and
petrochemical industries widely so it is an ideal tally instrument.
I.INTRODUCTION TO UT311 PRODUCT
Working principle:
Acceleration sensor
Wave filter Integer I Adjustment I
Integer II Adjustment II
AC/DC A/D LCD
II.UNPACKING INSPECTION
Please unpack and check if following items are deficient or damaged or not. Please contact
the nearest sales service agent of our company if there is any deficiency or damage.
1.Host------------------------------------------------------------------1 set
2.Stainless steel measurement rod----------------------------1 (standard) wire assembled to host
3.Hanging rope----------------------------------------------------- 1 (standard) wire assembled to host
4.9V battery----------------------------------------------------------1 section
5.Manual--------------------------------------------------------------1 book
6.Certificate----------------------------------------------------------1 sheet
III.SAFETY NOTICES
Warning: Please pay attention to possible danger and conditions for user or damage
factors for vibration meter!
Please use vibration meter according to steps shown in the manual or it may be damaged.
Please abide by following guidelines to avoid instrument damage.
To check if shell is ruptured or lacks of plastic pieces or not before using vibration meter.
Please do not use vibration meter with damaged shell.
Please replace battery as soon as possible to avoid error of measuring data if battery
symbol of appears.
Please do not continue to use vibration meter which operates abnormally. Please send it to
fixed repair agent of our company for repair.
Please do not use vibration meter in wet environment with combustible and explosive gas.
Please do not detach shell of vibration meter to avoid damage.
Please do not try to charge battery to avoid personal injury due to battery explosion.

Please pay attention to + and - poles during battery installation.
Please pay attention to protect LCD of vibration meter to avoid scratch or crush.
IV.INSTRUMENT STRUCTURE
1. Instrument structure (shown in Figure 1 and Form 1)
UNI T
Sensor Shell
LCD Measurement key
Three-gear toggle switch Measurement rod
1.Sensor 2.LCD 3.Three-gear toggle switch
4.Shell
5.Measurement key
6.Measurement rod
2. Symbol (shown in Figure 2 and Form 2)
Vibration acceleration
Vibration speed
Vibration displacement
1.
2.
3.
Vibration acceleration
Vibration speed
Vibration displacement
3. Key instructions (shown in Figure 1)
The 5 element shown in Figure 1: Measurement key button
th
V.INSTRUMENT SETUP AND OPERATION
1.Battery installation
Please open cell box on the instrument back and then install 6F22 type 9V laminated cell
into cell box. Please pay attention to polarity then cover it.
2.Power Inspection
Please press measurement key and observe display. Battery replacement mark in the left
end of display shows low battery voltage and prompt of battery replacement. No mark refers
to normal voltage for measurement. (Machine will power off automatically 1 minute after
loosening the key.)

3.Selection of measurement mode
Please toggle measurement selection switch of vibration meter to select measurement
acceleration, speed or displacement. Right arrow on display will point to selected
measurement unit.
4.Measurement
Please connect signal wires connected to sensor to input connector of left sensor then
absorb sensor with magnetic base to vertical cross section of measured article during use
for the first time. Instrument can enter into measurement status instantly by pressing
measurement key by thumb. Measuring value will be maintained after loosening the key.
Measurement also can be continued by pressing measurement key again. Data will be
maintained for 1 minute after loosening the key and instrument will power off automatically
at the same time. (Note: Please tighten clasp when connecting signal wires and hold
instrument and sensor in hands after measurement. It is not allowed to hoist sensor by
signal wires to avoid influence to service life of such wires.)
VI.TECHNICAL INDICATORS
1.General Specification
LCD display: 3 1/2-bit display; The maximum display: 1999
Under-voltage display:
Sensor type: Acceleration sensor
Power demand: 1 6F22 9V carbon or alkali battery
Service life: To operate for more than 20 hours continuously
Outline dimension: 185 (H) * 68 (W) * 30 (D) mm (for host)
Weight: About 230g (including battery)
2.Environment Limitation
Indoor use
Safety standard: GB 4793, 1-2007
Pollution level: Grade 2
Operation temperature & humidity: 0 ~40 (not more than 90%RH)
Storage temperature & humidity: 0 ~+40 (not more than 80%RH)
3.Technical Specification
Accuracy: 5% of 1 word (% of reading + word quantity); Correction period is 1 year;
Ambient temperature: 0 ~40
Ambient humidity: 80% RH
Temperature coefficient: 0.1*(accuracy)/
Vibration measurement scope
~~~
Measurement unit
Range
Frequency response
scope and amplitude error
Linear error of amplitude
Vibration
acceleration (O-P)
Vibration speed
(RMS)
Vibration
displacement (P-P)

VII. MAINTENANCE
Warning: It is not allowed to scratch LCD of vibration meter during battery replacement and
measurement to avoid damage or influence to measurement precision. It is also not allowed to
charge replaced battery to avoid personal injury due to explosion!
1.Battery installation and replacement
Be sure to replace battery in a timely manner when symbol of appears for vibration
meter. Battery replacement method is as follows:
Removing cell cover: Please replace 6F22 9V battery by the same model. Please do not in
stall improper battery.
Please pay attention to + and - polarity during battery installation.
Please install cell cover after installation.
2.General Maintenance
Please clean dirty instrument shell by wet cloth and neutral detergent. Please do not use
abrasive or solvent.
Please send damaged vibration meter to fixed repair agent or professional repair personnel
of our company if required. Please do not try to repair it individually.
Please do not scratch or contaminate LCD of vibration meter during use to avoid oil stain,
water leakage, damage or influence to it.
Please take battery out if it will not be used for a long time.
Please do not store instruments in wet environment and strong magnetic field under high
temperature.
3.Common Troubleshooting
Common troubles
No bootstrap
Tripping display or system halted
Possible reason
Poor battery contact
Broken toggle switch or poor toggle