2Flow RM130 User manual

Ultrasonic Thickness Gauge
Instruction Manual

Contents
Before use
Operation instructions
Measurement tips-------------------------------(14)
Precautions for accuracy---------------------(17)
Maintain and warranty-------------------------(19)
Table of sound velocity------------------------(21)
Before measurement---------------------------------(06)
--------(08)
--------------------------------(09)
-------------------------------(10)
-(11)
-----------------------------------(13)
Thickness measurement---------------------
Sound measurement
Thickness alarm set-up
Thickness data storage/record/delete------------
Other features-------
Check-up-----------------------------------------------(01)
--------------------------------------------(02)
S ------------------------------------------- (03)
Diagram of the unit ------------------------------------(04)
Introduction
pecification

-01-
1PCS
1PCS
1PCS
1PCS
1PCS
3PCS
1PCS
1PCS
1PCS
Ultrasonic Thickness Gauge
10 Transducer(5KHz)
6
Coupling agent (50ml)
4mm Sample block
1.5V AAA Alkaline battery
English Instruction Manual
Aluminium Packing Box
Optional accesseries transducer:
Transducer (5KHz)
10 Transducer(2.5KHz)
Check-up
1. Before use
Carefully unpack yourkit and ensurethat you have
the following items.In case thatany item ismissing or
if you findany mismatch ordamage, promptly contact
your dealer.

-02-
Introduction
1).Introduction
This unit is an intelligent handheld product, whichadopts
ultrasonic measuring principle,and is controlledby micro
processor, providesquick and precisemeasurement of
thickness for mostof industrial material.This unit is widely
used in variousprecise measurement fordifferent hardw-
are /parts inindustrial realm; oneof its importantapplica-
tion is tomonitor the levelof thickness-decreasing during
operation of variousand pressure container. Diffusely
applied in manufacturefields, metal processing,and
commercial inspection.
2).Scope of application
This unit is suitable formeasuring materials thatare good
ultrasonic conductor suchas metal, plastic,ceramic,
glass etc., aslong as themeasured part intwo parallel
surfaces for measurementof thickness. This unit isnot
suitable for castiron due toits big crystalloidcomposition.
3).Features and functions
Preset
Auto calibration toassure the accuracy
Sound velocity measurement:with a giventhickness to
measure the soundvelocity to improveaccuracy
12 sound velocitiesfor different material
Coupling status indication
12 thickness measurementdata store andrecall
Thickness alarm setup
Backlight display
Low battery indication
Auto power off
Metric / Imperialselection

Specification
-03-
. Measuring range:1.00 to 300.0mm(steel)
. Accuracy: (1%H+0.1mm)
denotes the measuredthickness
. Working frequency: 5MHz
. Resolution:0.01mm(1.00 to99.99mm)
0.1mm(100 to 300mm)
. Minimum limitfor tube measuring steel :
15*2.0mm( 6mm transducer)
20*3.0mm( 10mm transducer)
. Sound velocityrange:1000 to 9999m/s
Thickness 20mm, accuracy ofvelocity: 1mm/H 100%
Thickness 20mm , accuracy ofvelocity: 5%
. Operating environment:
Operation temperature: 0to 40
Temperature of workpiece: <60
Relative Humidity: <90%
Do not apply in violent vibration / erosive material
Avoid impact and humidity
. Power supply:1.5V AAA* 3 PCS
. Operation current: 35mA (withback light on)
. Size: 72*29*146mm
. Weight:223g

-04-
Ultrasonic Thickness Gauge
VEL
DEL
ALARM
RECALL
ENTER
CAL
GM130
INCH
. LCD display
. Keypad
. Sample block
. Battery compartement(rear case)
. Transducer
+ Receive socket. Trasimitsocket /
Diagram Of The Unit
1). Main Body:

Control Panel
VEL
DEL
ALARM
RECALL
ENTER
CAL
INCH
VEL
DEL
ALARM
RECALL
ENTER
CAL
INCH
3).LCD display
. Coupling indicator
. TransducerFrequency
. Back lighticon
. Battery power
. Thickness unit
. Sound velocityindicator
. Thickness alarm
. Sound velocityunit
. Sound velocityreading
. Velocitystored unit
. Thickness reading
-05-
2). Keypad
-- ON/OFF
-- Alarmset-up/Data recall
-- Velocityset-up/ Select /delete
Stored data
--Enter / Calibration
-- Velocity/ Thickness /Alarm adjust
-- Velocity/ Thickness /
Alarm adjust, Backlight ON/OFF

-06-
Before Measurement
Ready to use
VEL
DEL
ENTER
CAL
Velocity selection
2. Operation Instruction
1). Connectthe transducer withthe unit, thenpress to
turn on. LCDwith full screendisplay with backlight for
0.5 second, thenLCD display thelast applied sound
velocity. Now the unitis ready foruse.
2).Sound velocity selection
Press twice toentre sound velocityadjustment with
icon blinking, pressup or downkey to selectyour
desired velocity, to finishthe selection by press .

-07-
ENTER
CAL
VEL
DEL
ENTER
CAL
3).Sound velocity adjustment
Press onece to entre velocity adjustment with stored
velocity unit blinking, press up or down key to adjust the
velocity to obtain desired value, then press to finish
the adjustment. The revised velocity will be saved into the
unit.
4).Calibration
On normal status,press for 3second, then CAL
symbol shows inLCD with 5900 m/s velocity and 4.00 mm
display.
Use the standardsample block forcalibration, until CAL
symbol disappeared, pressup or downkey to entremea-
surement mode.
Ready to calibration Ready to use
After adjustmentBefore adjustment

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Thickness Measurement
Put few couplingagent on thearea to bemeasured to
couple the transducerwith the hardware/workpiece. LCD
will display thethickness reading. Duringmeasurement,
indicates a wellcoupling, if theicon flashed ornot shows
means a poorcoupling, after removetransducer, thereading
will hold without .
Well coupling
measurement
REMARK:
1).Toselect / adjustthe velocity asthe table ofsound velocity
for thickness measurement.But the actualvelocity in the
hardware / workpiecewill slightly different, in this case the
reading of thicknessnot very accurate.
2).Select a sampleblock with samematerial to thehardware
or workpiece tobe measured toread out thevelocity. Then
apply this velocityfor thickness measurement.In this way
the reading ofthickness much moreaccurately.
Measurement
accomplished

-09-
Thickness
measurement
Velocity
measurement
Velocity Measurement
ENTER
CAL
With a giventhickness to readout velocity ofmaterial:
Obtains the thicknessof material byusing vernier caliper/
micrometer. Then couple thetransducer with thatsample
material until athickness displays, pressup or downto adjust
the reading matchthe thickness bycaliper/micrometer, then
press to displaythe velocity andsave in currentvelocity
memory unit.

Thickness Alarm Set-up
ALARM
RECALL
ENTER
CAL
-10-
Press will entreLOW thickness alarmset-up, press
up or downkey to adjustthe limit, thenpress to confirmed.
Then it willturn into HIGHthickness alarm set-up,press
to save thesetting as defaultalarm. During measurement, if
the thickness over/under the settinglimit, BIBI soundsand
HIGH/LOW will indicates for alarming.
Low Limit set-up High Limit set-up
ENTER
CAL

ENTER
CAL
Thickness Data Storage/record/delete
ENTER
CAL
ALARM
RECALL
ENTER
CAL
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Memory full
Data store
Data recall
Vacant Memory
1). Thickness data storage
During measurement, press once to savethe thick-
ness reading, ifa FUL symbol show in the LCD thatindicates
the memory isfull.
2). Store thickness data record
Press for 3 seconds to entre data record mode, press
up or down key to review M01 to M12 stored data.
If the memory unit is vacant, LCD will display ----, press
again turn to normal status.

VEL
DEL
VEL
DEL
-12-
3).Data delete
(1). Press for3 second toclear all storeddata,
symbol will showon LCD.
(2). In datarecall mode, press to delete current
stored data.After delete data,the vacant memorywill
display---- on theLCD.
Clear all data Delete current data

Other Features
INCH
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1). Low batteryindication
When battery powerdown to 3.3V 0.2V, the low battery
icon will display, please replacethe batteries for
further measurement.
2). Back lightselection
Keep pressing the to turn on(not release), press
to chose backlightON/OFF.Then release .
If backlight ONis Chosed, anyoperation will active the
backlight. The backlight will beturned off in 10 seconds
without operation.
The backlight status will bememorized, until youchange
it.
3) Metric / Impetricselection
Keep pressing the to turn on(not release), press
to close yourdesired unit. Then release .
The chosen unit will bememorized until youchange it!
4). Turnoff:
Press to turnoff/on the unit. The unit will be turned
off in 1 minute withoutany operation.
Remark:
Press up ordown key toadjust/select different velocity or
thickness.

-14-
3. Measurement tips
1). Cleaning surface
Before measuring, thedust, dirt, rustingand grease etc
that adheres onthe hardware/workpiece mustbe removed
off and cleaned.
2). Decreasing theroughness of surface
Too rough surfacemay result inmeasure error/ fault
reading. Please tryto make thesurface smooth bymilling,
polishing, filling orusing high viscositycoupling agent.
3). Rough machiningsurface
The regular tiny texture/slots resultingform rough mach-
ining process maycause error,and the compensation
method is thesame as in3.2, adjusting theangle between
the crosstalk segregatingboard of thetransducer a metal
membrane crossing thedetector bottom centreand linear
texture/slots (parallel orvertically) may alsoget a better
result.
4). Measuring pipeand tubing
When measuring cylindricalparts to determinethe thick-
ness of thepipe wall, orientationof the transducersis
important. If thediameter of thepipe is large than appro-
ximately 4 inches,measurements should bemade with
the transducer orientedso that thegap in thewearface is
perpendicular (at rightangle) to longaxis of thepipe. For
smaller pipe diameters,two measurements shouldbe
performed, one withthe wearface gapperpendicular,
another with thegap parallel tothe long axisof the pipe.
The smaller of the twodisplayed values shouldthen be
taken as thethickness at thatpoint.
5). Complex shapematerial
For complex shapematerial measurement, pleaserefer
to the 3.4,the smaller ofthe two reading should then be

-15-
taken as thethickness.
6). Non-parallel surface
To get asatisfying ultrasonic response,the surface must
have its onemeasuring side parallelwith another,other-
wise will obtainwrong result.
7). Influence ofthe material temperature
The size & sound velocityof material willchange with the
temperature, when theprecision is critical,please make
measurement in 2samples of thematerial under thesame
temperature to determinethe proper readingresulting
from the temperature.When taking measurementfor st-
eel parts inhigh temperature, thismethod may beadop-
ted to obtainthe correct reading.
8). High acousticreduction material
For materials infiber, poriferousor big granular, acoustic
dispersion will causethe energy attenuationthat may
result in abnormalreadings(practically the readingless
than the actualthickness), in thiscase the materialis not
suitable for theunit.
9). Reference sampleblock
For calibration forthe gauge, agiven thickness orsound
velocity of thematerial is veryimport. Calibration needs
at lest onereferring standard sampleblock. This gauge
is provided witha 4.0mm sampleblock, please checkfor
calibration operations.
In different material & situation,only one sampleblock
may not satisfyevery calibration. The more similarsample
block, the moreexact reading obtained.Ideally, referring
block is agroup of different thickness andsame material,

-16-
by calibrating tothe referring block,the effect of variation
of sound velocitywill be minimized.To get the most exact
measure, a setof referring blockis very important.
When measuring thinmaterial which thicknessclose to
the minimum limitrange of thisunit, please use a referring
block to defineexact limit ofthis material. Do not measu-
ring the materialthat the thicknessunder the minimum limit.
11). Selection of transducer
ITEM Characteristic Range Operation
temperature
10). The wear of thetransducer will effect the measurement,
when below situationhappen, please replace the
transducer:
A. onlydisplay one readingwhen measured different
thickness;
B. reading displaywithout take measurement.
General-purpose
Thin workpeice
General-purpose
1.00mm to 300.0mm(steel)
1.00mm to 50.0mm(steel)
1.00mm to 300.0mm(steel)
-10 to 60
-10 to 60
-10 to 60
10mm
6mm
10mm

4. Precautions for accuracy
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1). For verythin material
Any ultrasonicthickness gauge, whenthe thickness of
the material tobe measured isless than the minimum limit
the fault readingwill occurs. Usingsample block compare
method to geta minimum limitof this material.
2). For stained,rusting surface
The stained/rusting surface on the contra side will occurs
the ruleless wrongreadings. Sometimes asmall stained
spot is hardto find out.Take care for measurement while
measuring the knownrusting spot/suspicious area.
Or using soundinsulation boardcelotex tolocates the
spot in different testing angles.
3). Identify different velocity withvary material
Afault reading wouldobtains, when measuring the hard-
ware with thevelocity calibrated byprior material. So a
correct velocity shouldbe adopted. The fault reading may
also result formthe difference between the actual velocity
with the calibratedvalue.
4). Abrasionfo the transducer
Because the transduceris made of propylene, long period
use will causethe surface oftransducer became more
rough which willdecline the sensitivitylead to the wrong
reading. Please polishthe surface withsand paper or
whetstone to assurethe smoothness and parallel. If the
reading still unsteady, the transducershould be replaced
with new one.
5). ZERO function
ZERO(calibration) is usedto calibrate the unit with the
standard block onthe panel, dopress this key for calibr-
ation with othermaterials or willthe wrong measuring
will take place.
6). Multilayer /composite material
It is impossibleto read outthe thickness of the uncoupled
multilayer for theultrasonic wave can not go through the
uncoupled space. Furthermore, the sonic wave cannot
travel in thecomposite material atan even speed, so ult-

-18-
rasonic reflect principlecannot be appliedto measure
the multilayer/composite material.
7). Influence fromthe oxidized surface
For some metals,such as aluminuma layer of oxide being
generated on theirsurface. The oxidized layer combined
with the substratetightly, but the sonic wave travel within
2 different material which willlead to errorreading, the
more oxidized layerthe reading willbe more tolerant.
Please calibrated theunit with thesample block thatpick
up along thehardware to bemeasured, and obtainthe
thick of sampleblock by usingmicrometer.
8). Abnormal reading
Aseasoned operator shouldbe capable todistinguish the
abnormal reading, practicallyresult from rusting,erosive
recess surface /incorrect calibrate sampleblock/ the
inner flaw ofmaterial.
9). Choose andusing coupling agent
Coupling agent serves the high frequencyultrasonic
wave transmitting betweenthe transducer tothe hardware.
Choose incorrect agentor wrong operationman cause
error or poorcoupling which leadto failure ofmeasuring.
The coupling agent should beused in properway, typic-
cally, a single dropletof agent issufficient.
It is importantto use propercoupling agent, low viscosity
agent(the provided agent/ machining oil)is suitable for
smooth surface. Forrough / veritcal/ aluminum surface,
high viscosity agentlike glycerin andlubrication grease
is applicable.All kinds ofcoupling agent isavailable in
local market, youcan buy itform local distributoras well.