MANUAL
SURFACE ROUGHNESS TESTER
PCE-RT 10
This Surface Roughness Tester is small in
size, light in weight, easy to carry. Although
complex and advanced, it is convenient to
use and operate. Its ruggedness will allow
many years of use if proper operating
techniques are followed. Please read the
following instructions carefully and always
PCE Americas Inc.
711 Commerce Way
Suite 8
Jupiter
FL-33458
USA
From outside US: +1
Tel: (561) 320-9162
Fax: (561) 320-9176
info@pce-americas.com
www.pce-instruments.com/english
www.pce-instruments.com
PCE Instruments UK Ltd.
Unit 11
Southpoint Business Park
Ensign way
Hampshire / Southampton
United Kingdom, SO31 4RF
From outside UK: +44
Tel: (0) 2380 98703 0
Fax: (0) 2380 98703 9
info@pce-instruments.co.uk
TABLE OF CONTENTS
1. FEATURES....................................................1
2. SPECIFICATIONS..........................................2
3. FRONT PANEL DESCRIPTIONS AND
NAMES OF EACH PARTS ...............................4
4. MEASURING PROCEDURE........................... . 5
5. HOW TO SET THE EVALUATION LENGTH........7
6. HOW TO CALIBRATE THE TESTER................. 8
7.COMMUNICATE WITH PC................................8
8.GENERAL MAINTENANCE.............................. 8
9.REFERENCES............................................... 9
10.BATTERY REPLACEMENT ...........................10
1. FEATURES
This instrument is compatible with four standard
f ISO, DIN, ANSI and JIS and is widely used i
o
p
roduction site to measure surface roughness o
v
arious machinery-processed parts, calculat
orresponding parameters according to selecte
c
m
easuring conditions and clearly display al
easurement parameters. When meas uring th
m
oughness of a surface, the sensor is pla ced o
r
t
he surface and then uniformly slides along th
urface by driving the mechanism inside th
s
ester. The sensor gets the surface roughness b
t
t
he sharp built-in probe. This roughness cause
isplacement of the probe which results in chang
d
o
f inductive amount of induction coils so as t
g
enerate analogue signal, which is in proportio
o the surface roughness at output end of phase-
t
sensitive rectifier. The exclusive DSP processe
a
nd calculates and then outputs the measuremen
esults on LCD
r
ultiple parameter measurement: Ra, Rz
* M
ighly sophisticated inductance sensor.
* H
mall in size, light in weight and easy to use.
* S
* C
an communicate with PC computer fo
tatistics, printing and analysing by the optiona
s
cable and the software for RS232C interface.
*Manual or automatic shut down. The tester ca
e switched off by pressing the Power key at any
b
time. On the other hand, the tester will powe
1
.
n
e
l
n
e
e
o
r
r.
s
operation.
*Metric /Imperial Conversion
Itself off about 5 minutes after the last key
f
2. SPECIFICATIONS
Display: 4 digits, 10mm LCD, with blue backlight
d
e
Parameters: Ra, Rz
Display Range
Ra: 0.05-10.00um
Rz: 0.1-50.0um
Accuracy: Not more than ±15%
y
s
e
n
s
t
Fluctuation of display value: Not more than 10%
Sensor :
Test Principle: Inductance type
Radius of Probe Pin: 10µm
Material of Probe Pin: Diamond
Measurement Force of Probe: 16mN(1.6gf)
Probe Angle: 90°
Vertical Radius of Guiding Head: 48mm
Maximum driving stroke: 12.5mm/0.5inch
Cutoff length : 0.25mm / 0.8mm / 2.5mm optional
Driving speed:
sampling length = 0.25mm Vt=0.135mm/s
sampling length = 0.8mm Vt=0.5mm/s
l
sampling length = 2.5mm Vt=1mm/s
returning Vt=1mm/s
n
Resolution : 0.001um if reading＜10um
0.01um if 10um≤reading＜100um
0.1um if reading ≥100um
2
Evaluation length: 1~2 cut off optional
Power battery: 4x1.5vAA/UM 3
Operating conditions: Temp. 0~40℃
Humidity <80%
Size：128×8 0×30mm
Weight: about 280 g
Standard Accessories：
Carrying case
Main unit
Standard sensor
Standard sample plate
Operation manual
Screwdriver
Optional Accessories
Cable & software for RS232C
3. FRONT PANE L DESCRIPTIONS AND NAMES
OF EACH PARTS
Fig. 3-1
3
4
1
2
3
4
5
6
7
8
9
10
11
12
Calibration
Measurement
Position pointer
Parameters
Parameter Key & Up Key
CAL Key
Power Key
Battery
Unit
Cutoff
Start Key
Cutoff Key
D. To check if the cutoff length selected is right. if not,
CUT
depress the ke y
cut-off length, please see the table on page 11.
OF F
to select. For the recommende d
E. To check if the measurement unit selected i s
right. If not, just press the key to switch betwee
Um/Uin
the metric system and the British system.
F. To clear the surface of the part to be measured.
G. Refer to Figure 4-1 and Figure 4-2 to place th
instrument correctly, stably and reliably on th
e
e
surface to be measured.
H. Refer to Figure 4-2, the sliding trail of the
ensor must be vertical to the direction of process
s
line of the measured surface.
I. Adjustable leg and sheath of sensor
n
13
um/uinch Key & Down Key
4. MEASURING PROCEDURES
4.1 Preparations for measurement
A. Switch on to test if the battery voltage is normal.
B. The instrument automatically restores conditions
of the last measurement before it is turned off since
these conditions are automatically stored. Before
taking measurement, preparations have to be made
and checked.
C. To check if the parameter selected is right. If not,
depress the key to select.
Ra/R z
Fig.4-1
5
6
4.2 Measuring
Fig.4-2
After preparations is done, just press Start key to
measureIf measuring conditions are not to be changed.
Firstly,you will see the “—” on the display and the probe
ismoving forward and sampling. Then you will see the
probe stop sliding and move backward. The
measurement result shows on the display after the
probe stop moving. You can browse measurement
.
values of different parameters once depressing the key
.
Ra/R z
5. H OW TO SET T HE EVALUATI ON LENG TH
To set or browse the evaluation length, just depress the
CAL
key and not release it until showing on the 'LEN'
display. It takes about 6 seconds from starting pressing
7
the key CAL. Then change the evaluationlength to the
desired length among 1~2Lby the key or . To save
or quit, just press any key except the key or .
Ra/R z
Ra/R z Um/ Uin
Um/U in
6. HOW TO CA LIB RAT E THE TES TER
6.1 To enter the calibration state, just depressing the
CAL
key , The calibration state is marked by CAL“ ”.
6.2Take a measurement based on the Standard sample.
Contrast the measuring value with the value of standard
sample plate based on the same parameter.
6.3Depress the key or to adjust the reading to the
Ra/R z Um/U in
standard value.
6.4Just repeat 6.2 to 6.3 till the accuracy is ok.
6.5To quit, just press any key other than “START” key.
6.6 The instrument has been thoroughly tested before
delivery to ensure that the display value error is less
than 10%. The user is recommended not to use the
calibration function too often.
7. COMMUNICATE WITH PC
This tester can communicate with PC computer by use
of the optional communicating cable and software. For
detailed information, please see the instructions with
the optional software.
8. GENERAL MAINTENANCE
8.1 Avoid crashes, intensive vibration, heavy dust,
humidity, grease stains and strong magnetic fields.
8.2 The sensor is a precise part and should be protected
carefully. It is recommended to put it back in the box
after each operation.
8.3 Protect the standard sample plate belonging to the
instrument carefully to avoid calibration faults caused
8
by scratches.
9. REFERENCES
9.1 Central line
This tester adopts minim um central line of Least
Square Algorithm.
9.2 Definition of roughness parameter
9.2.1 Ra arithmetical mean deviation of profile
Arithmetic value of mean deviation of profile
within sampling length.
1
( )
dxxY
x
Y(x )
Ral=
l
0
Sam pl ing L eng th( l)
9.2.2 Rz maximum height of profile
Sum of height of the largest profile peak height
Ypmax and the largest profile valley depth Yvm ax
within a sampling length.
9
9.3 Code Standard Name
ISO 4287 Internati onal St andard
DIN 4768(2010-07-00) German St andar d
JIS B601 Japanese Industr ial Standard
ANSI B46.1 American Standard
9.4 Traversing length
L=sampling length
n=number of sampling length
l x n=evaluation length
App roach
len gth
Ori gin
ll
Pre -trav el
len gth
Traversing length
l×n
Eva luati on leng th
Nor mal mea surin g
pos ition
10. BATTERY REPLACEMENT
10.1 When it is necessary to replace t he battery,
i.e battery voltage less th en appr ox 5v, the battery
symbol ‘ ’ will appear on the Display.
10.2 Slide the Battery cove r(3-6 )away
from the instrument and remove the
10
batteries.
10.3 Install the batter ies (4x1.5v AA/UM 3)
correctly into the case.
Cutoff length recommende d
Ra
(μm)
＞5~10
＞2.5~5
＞1.25~2 .5
＞0.63~1 .2 5
＞0.32~0 .6 3
＞0.25~0 .3 2
＞0.20~0 .2 5
＞0.16~0 .2 0
＞0.125~ 0. 16
＞0.1~0. 12 5
＞0.08~0 .1
＞0.063~ 0. 08
＞0.05~0 .0 63
＞0.04~0 .0 5
＞0.032~ 0. 04
＞0.025~ 0. 03 2
＞0.02~0 .0 25
Rz
(μm)
＞20~40
＞10~2 0
＞6.3~10
＞3.2~ 6. 3
＞1.6~ 3. 2
＞1.25 ~1 .6
＞1.0~1. 25
＞0.8~ 1. 0
＞0.63 ~0 .8
＞0.5~0. 63
＞0.4~ 0. 5
＞0.32 ~0 .4
＞0.25 ~0 .32
＞0.2~ 0. 25
＞0.16 ~0 .2
＞0.12 5~ 0.16
＞0.1~ 0. 125
Cutoff l ength
(mm)
2.5
0.8
0.25
11
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