WYLER ML NT 11 User manual

WYLER AG
Im Hölderli
CH-8405 WINTERTHUR
Switzerland
Tel. [phone]
Fax. [phone]
Homepage: http://www.wylerag.com
E-Mail: [email protected]
OPERATOR'S MANUAL
LEVELTRONIC „classic“ and “NT”
MINILEVEL “classic” and “NT”
LEVELMETER 25 / C25
LEVELMETER 2000
File: „nt_eng.doc“ 25.7.1999

Page 2 of 42 pages
Content
SUBJECT
Page
INDEX 3
1. BASICS 6
1.1. Instrument's overview 6
1.2. Measuring instruments / External display instruments 7
1.3. Measuring procedure / general use 8
1.3.1
Basic set-up of the inclination measuring instruments / plus - minus rule 8
1.3.2 Absolute measurement / Relative measurement / Differential measurement 9
1.3.3
General remarks about "ANGLES" 10
1.3.4
Height related to the step length 11
1.4. Zero setting by reversal measurement (Absolute ZERO) 12
1.5. Applications 12
1.5.1 Measuring absolute 12
1.5.2 Measuring relative 12
1.5.3 Differential respectively reference measurement using an engineer set 13
1.5.4 Angular measurements 15
1.5.5 Lines and flatness measurement (manual procedure) 16
1.6. WYLER software LEVELSOFT 17
2. DETAILED INFORMATION to the various instruments 19
2.1. MINILEVEL / LEVELTRONIC „classic“ 19
2.1.1 MINILEVEL “classic” A10 / LEVELMETER C25/DC (red cover) 19
2.1.2 LEVELMETER C25 / DC 20
2.1.3 LEVELTRONIC “classic” A40 / LEVELMETER 25 (blue cover) 22
2.1.4 LEVELMETER 25 22
2.2. MINILEVEL / LEVELTRONIC „NT“ 24
2.2.1 MINILEVEL “NT” 11 / LEVELMETER C25 (red cover) or
LEVELMETER 2000
24
2.2.2 LEVELMETER C25/DC 25
2.2.3 LEVELMETER 2000 26
2.2.4 LEVELTRONIC “NT” 41 with LEVELMETER C25/DC (red cover) or
LEVELMETER 2000
31
2.2.5 LEVELMETER C25/DC 32
2.2.6 LEVELMETER 2000 33
3. TECHNICAL DATA 38
3.1. LEVELTRONIC “classic” / A40 38
3.2. LEVELTRONIC “NT” / 41 38
3.3. MINILEVEL “classic” / A10 38
3.4. MINILEVEL “NT” / 11 39
4. MAINTENANCE 39
4.1. Easily cured difficulties 39
5. ACCESSORIES / SPARE PARTS 41
6. STORING Instruments / Care and handling of the batteries 41/42
7. REPAIR OF MEASURING INSTRUMENTS 42
Änderungen / Modifications:
Datum / Date Geändert durch
Modified by
Beschreibung der Änderung
Description of modifications
5.9.2000 HEH Fig. 9 / Seite 11 neu
27.3.2001 HEH Data collection using ENTER key
10.1.2003 HEH/MO Index included, Levelsoft PRO, deactivation autom. shut off
2.4.2003 HEH New:Express Repair Service

Page 3 of 42 pages
INDEX
Key word Chapter Page
A
A
bsolute measurement / Relative measurement / Differential measurement 1.3.2 9
A
bsolute ZERO, Zero settin
g
b
y
reversal measurement 1.4 12
A
CCESSORIES / SPARE PARTS 5 41
A
nalo
g
ue data transmission 29
A
n
g
le / Inclination 1.3.3 10
A
n
g
les 90°, 1.5.4 15
A
n
g
ular error of the instrument 1.5.4 15
B
Basic set-up of the inclination measurin
g
instruments / plus - minus rule 1.3.1 8
Basics 1 6
Batter
y
chan
g
e / Batter
y
check LEVELMETER 25 2.1.4 22
Batter
y
/ Care and handlin
g
of the batteries 6.2 42
C
Chan
g
e of Measurin
g
Unit, LM 2000, with Leveltronic “NT” 2.2.6.7 34
Chan
g
e of Measurin
g
Unit, with Minilevel “NT” 2.2.3.7 27
Classic, Instruments 1.1 6
Collecting the data from a LM 2000 to a PC when using WYLER sw LEVELSOFT 2.2.3.8 28
Collectin
g
the data from a LM 2000 to a PC when usin
g
WYLER sw LEVELSOFT 2.2.6.8 35
Configurations possible with LEVELTRONIC „NT“ 41 36
Confi
g
urations with LEVELTRONIC „classic“ 2.1.3 22
Confi
g
urations with MINILEVEL „classic“ 2.1.2 20
D
Detailed information to the various instruments 2 19
Differences between LEVELMETER 25, C25 and LEVELMETER 2000,
g
eneral 1.2 7
Differences between Minilevel / Leveltronic concernin
g
the displa
y
1.2 7
Differential measurement 1.3.2 9
Differential Measurement with Levelmeter 2000 / Minilevel “NT” 2.2.3.3 26
Differential Measurement with relative Zero, LM 2000, with Leveltronic “NT” 2.2.6.6 34
Differential Measurement with Relative Zero, with Minilevel “NT” 2.2.3.6 27
Differential Measurement, LM 2000 with Leveltronic “NT” 2.2.6.3 33
Differential respectivel
y
reference measurement usin
g
an en
g
ineer set 1.5.3 13
Di
g
ital data transmission
(
RS485
)
29
Disablin
g
the automatic shut-off of the LEVELMETER 2000 2.2.3.9 28
Disablin
g
the automatic shut-off of the LEVELMETER 2000 2.2.6.9 35
E
En
g
ineer set 1.5.3 13
En
g
ineer set 2 Leveltronic NT 41 with LEVELMETER 2000 1.1 6
En
g
ineer set with 2 Leveltronic A40 „classic“ and LEVELMETER 25/AC 1.1 6
Examples for differential / reference measurement 1.5.3 13
Express Repair Service, ERS 7 42
External displa
y
unit./ Instruments 1.2 7
F
Flatness measurement
(
manual procedure
)
1.5.5 16
Flatness measurement of partial surfaces 1.6 17
Flatness measurement of surfaces 1.6 17
Flatness measurement software LEVELSOFT PRO of WYLER
A
G 1.2 7
Flatness of a surface plate 1.3.1 8
Function check of the MINILEVEL „classic“ combined with LEVELMETER C25 2.1.2 20
G
General remarks about "ANGLES" 1.3.3 10
General use / measurin
g
procedure 1.3 8
Guide wa
y
s of machine beds 1.5.3 13
H
Hei
g
ht related to the step len
g
th 1.3.4 11

Page 4 of 42 pages
I
Inclination / An
g
le 1.3.3 10
Insertin
g
the batter
y
in LEVELTRONIC “NT” 41 31
Instruments / external displa
y
1.2 7
Instrument's overview 1.1 6
ISO 1101 1.6 17
L
LEVELMETER 2000, with Leveltronic “NT” 2.2.6 33
LEVELMETER 25 and LEVELTRONIC “classic” A40 2.1.3 22
LEVELMETER C25 / DC with Minilevel “classic” 2.1.2 20
LEVELMETER C25/DC with Minilevel / Leveltronic “NT” 2.2.5 32
LEVELMETER C25/DC with Minilevel “ / Leveltronic NT” 2.2.2 25
LEVELMETER 2000 with Minilevel “NT” 2.2.3 26
LEVELMETER 2000, overview 1.2 7
LEVELSOFT PRO, WYLER software 1.6 17
LEVELTRONIC “classic” / A40 3.1 38
LEVELTRONIC “classic” A40 / LEVELMETER 25 2.1.4 22
LEVELTRONIC “NT” / 41 3.2 38
LEVELTRONIC “NT” 41 with LEVELMETER C25/DC (red cover) or LM2000 2.2.4 31
LEVELTRONIC „NT“ / MINILEVEL 2.2 24
Leveltronic NT 41 with LEVELMETER 2000 1.1 6
LEVELTRONIC NT 41 with LEVELMETER C25/DC 1.2 7
Lines and flatness measurement
(
manual procedure
)
1.5.5 16
Lines with twist 1.6 17
Lines, strai
g
htness 1.6 17
M
MAINTENANCE 4 39
Malfunctions, easil
y
cured difficulties 4.1 39
Measurement absolute with Levelmeter 2000 / Minilevel “NT” 2.2.3.2 26
Measurement absolute, LM 2000 with Leveltronic “NT” 2.2.6.2 33
Measurement on machine tools 1.6 17
Measurin
g
procedure /
g
eneral use 1.3 8
Measurin
g
with relative Zero, with Leveltronic “NT” 2.2.6.5 34
Measurin
g
with relative Zero, with Minilevel “NT” 2.2.3.5 27
MINILEVEL / LEVELTRONIC „NT“ 2.2 24
MINILEVEL “classic” / A10 3.3 38
MINILEVEL “classic” A10 / LEVELMETER C25/DC 2.1.1 19
MINILEVEL “NT” / 11 3.4 39
MINILEVEL “NT” 11 / LEVELMETER C25
(
red cover
)
or LEVELMETER 2000 2.2.1 24
MINILEVEL „NT“ 11, possible confi
g
urations 29
Minilevel A10 „classic“ 1.1 6
Minilevel A10 „classic“ 1.1 6
Minilevel NT 11 with inte
g
rated displa
y
1.1 6
mm/m and µm/m 1.3.3 10
N
NT Series, Instruments 1.1 6
P
Parallelism 1.6 17
Plus - minus rule 1.3.1 9
R
Rectan
g
ularit
y
1.6 17
Reference instrument 1.3.2 9
Reference, respectivel
y
differential measurement usin
g
an en
g
ineer set 1.5.3 13
Relative measurement 1.3.2 9
Repair of Measurin
g
Instruments 7 42
Reversal measurement 1.4 12

Page 5 of 42 pages
S
Sensitivit
y
of the instrument 1.5.5 16
Small an
g
les 1.5.4 15
SPARE PARTS / ACCESSORIES / 5 41
Square an
g
les 1.5.4 15
Start the LEVELMETER 2000 2.2.3.1 26
Start the LEVELMETER 2000, with Leveltronic “NT” 2.2.6.1 33
STORING 6.1 41
Switch off the Levelmeter 2000 2.2.6.9 35
Switch the Levelmeter 2000 off 2.2.3.9 28
T
TECHNICAL DATA 3 38
U
UNION JACK 1.6 17
Z
Zero setting (absolute ZERO) LEVELTRONIC „NT“ 41 with LEVELMETER C25/DC 36
Zero Setting (absolute) of LT „NT“ 41 with LM 2000 by reversal measurement 38
ZERO Settin
g
(
absolute
)
, reversal measurement, LM 2000 with Leveltronic “NT” 2.2.6.4 33
Zero settin
g
b
y
reversal measurement, Absolute ZERO 1.4 12
Zero settin
g
of MINILEVEL „NT“ 11 with LEVELMETER C25/DC 2.2.3 26
ZERO Settin
g
, absolute, reversal measurement with Levelmeter 2000/Minilevel “NT” 2.2.3.4 26

Page 6 of 42 pages
1. BASICS
The family of electronic inclination measuring instruments is very well suited for all kind of precision
measurement.
1.1 Instrument's overview
Series „classic“ Series „NT“
Minilevel A10 „classic“ with integrated display ML NT 11 with integrated display
Leveltronic A40 “classic” Leveltronic NT 41 with LEVELMETER 2000
Engineer set consisting of 2 Leveltronic A40 „classic“
and LEVELMETER 25/AC
2 Leveltronic NT 41 with LEVELMETER 2000
2 Minilevel NT 11 with LEVELMETER 2000
combined as engineer set

Page 7 of 42 pages
1.2 Measuring instruments / External display instruments
Differences between Minilevel / Leveltronic concerning display.
The MINILEVEL is equipped with an integrated display and can be used as
a stand-alone instrument. It is however possible to connect it to a Levelmeter
to receive remote display or to use it together with another instrument for
differential measurement.
MINILEVEL „classic“ for use with LEVELMETER C25/DC (red cover) /
Art.-no. WYLER: 025-005
MINILEVEL „NT“ with LEVELMETER 2000 / Art.-no. WYLER: 065-004-001 or
LEVELMETER C25/DC (red cover) / Art.-no. WYLER: 025-005
MINILEVEL NT 11
The LEVELTRONIC instruments are not equipped with an internal display and
require therefore the connection to an external display unit.
LEVELTRONIC „classic“ to a LEVELMETER 25/AC (blue cover) /
Art.-no. WYLER: 025-001
LEVELTRONIC „NT“ to
a LEVELMETER 2000 / Art.-no. WYLER: 065-004-001 or LEVELMETER
C25/DC (red cover) / Art.-no. WYLER: 025-005
LEVELTRONIC NT 41 with
LEVELMETER C25/DC
Differences between LEVELMETER 25, C25 and LEVELMETER 2000
LEVELMETER 25/AC LEVELMETER C25/DC
The LEVELMETER 25, respectively C25 is very simple
in using.
Possible connections:
•LM 25/AC to Leveltronic “classic”
•LM C25/DC to Minilevel “classic” as well as
Leveltronic “NT” and Minilevel “NT”
LEVELMETER 2000
The LEVELMETER 2000 has a number of built-in
sophisticated options, which can be used by the skilled
user.
The LEVELMETER is especially well suited for use with the above-mentioned instruments, especially when
differential measurement is applied in precision measurements. (Engineer set)
All the mentioned instruments are optimally used together with the flatness measurement software Levelsoft
PRO of WYLER AG

Page 8 of 42 pages
1.3 Measuring procedure / general use
1.3.1 Basic set-up of the inclination measuring instruments / plus - minus rule
The instrument should always be placed in a way that the cable output is on the right hand side.
Inclined to the right: positive
Declined to the right: negative
(Practical remark: positive values
indicate that some material may be
removed on the measured piece)
Before starting the measurement enough acclimatization time must be allowed for the instruments.
Place the instrument (LEVELTRONIC or MINILEVEL) carefully to the required measuring spot. (Surface) and
read the value on the LEVELMETER or on the integrated display.
It is important to measure always in the direction of the cable connector, respectively the cable.
Example: Flatness measurement of a surface plate
IMPORTANT:
•Touch the instruments only at
the handle (Temperature!!!)
•Measuring from left to right and
from close to far.
•Cable in measuring
direction

Page 9 of 42 pages
1.3.2 Absolute measurement / Relative measurement / Differential measurement
Absolute measurement
(Absolute ZERO) Condition for the absolute measurement is the performing of a
reversal measurement for determining the absolute zero (to the centre of
the earth)
After this procedure the instrument will display the effective deviation from
the centre of gravity. This means the value is an absolute angle of the
measured surface.
Example: if the object to be measured is absolutely level, the display is "0"
Relative measurement
(Relative ZERO) A number of measurements do not require the absolute ZERO as described above.
Example: Angular deviation between two objects. (Lines, surfaces, guide ways) The
measurement instrument is placed on an object and the displayed value is
changed to "0". Then the instrument is relocated to a second object and the
displayed value of the angle is the angular difference between the two
surfaces. If the display is also "0", then both surfaces are parallel.
Most important is that always the instrument is placed on both positions in
the same direction.
Differential measurement
A differential measurement is a measurement with two instruments Measuring
instrument (A) and Reference instrument (B), measuring the angular difference
between the two. This means e.g. if the angular change in both instruments is the
same the displayed value (Difference A - B) does not change. In principle this is a
special relative measurement.
I the following measuring tasks the differential measurement is especially used
•Measurement on object with vibrations imposed.
•Measurements on unstable systems or objects
Example: Measuring the flatness of a machine bed. The reference instrument is
placed on a stable part of the machine where the measurement is not
interfered. With the measuring instrument the measurement is taking place
without removing the reference instrument.

Page 10 of 42 pages
1.3.3 General remarks about "ANGLES"
Every angle may be defined in different
ways. The most popular way is a definition
in Degrees / Minutes / Seconds.
This is shown in the graph.
Such a definition is especially useful for
larger angles.
With an angular measuring instrument not only an
angle may be measured but also the height of a
certain point over a defined base length can be
calculated. for a profile of a line or a surface) Due to
this simple and reliable method a number of tasks
are possible, especially for measuring guide ways
and surface plates definition.
Angle α= Height of the measuring point related to a
defined base.
Height of the measuring point = tan αx length of base
Example:
Angle = Height related to a defined base.
e.g.. 22 µm/m
Example:
Because the relation µm/m is 1/1'000'000 the same
relation can also be applied to micro inch/inch
Angle = Height related to a defined base.
e.g. 22 µm/m are equal to 22 micro inch/inch or
0,000022 Inch / Inch

Page 11 of 42 pages
1.3.4 Height related to the step length
Height Hx in [µm] related to
step length
Height Hx [µm] = ]mm[LLength
]mm[LxSteplength]µm[HHeight ×
Height Hx in [micro Inch] related
to step length
1 micro Inch = 0,000001 Inch
Height Hx [micro Inch] = ]Inch[LLength
]Inch[LxSteplength]mikroINCH[HHeight ×
because Length L = 1 Inch →
Height Hx [micro Inch] = = Height H [micro Inch] x Step length Lx in
[Inch]
Height Hx in [µm] related to
step length
Height Hx [µm] = ]mm[LxLength
3600
sec]arc[
tan ×
α
Height Hx in [micro Inch] related
to step length
1 micro Inch = 0,000001 Inch
Height Hx [micro Inch] = = 000'000'1]Inch[LxLength
3600
sec]arc[
tan ××
α

Page 12 of 42 pages
1.4 Zero setting by reversal measurement (Absolute ZERO)
Using the reversal measurement is a simple way to determine the exact zero offset of the instrument as well as
the exact inclination of the surface the instrument is placed.
Procedure:
Prior to adjusting the zero point, the instrument should be allowed time to acquire the ambient, respectively the
work-piece temperature. Also the measuring system should have been switched on for about 1 min. (for
sensitivity of 1 mm/m about 3 minutes).
- Slide the instrument onto a flat, horizontally levelled surface (e.g. engineer's surface plate).
- The position of the MINILEVEL NT is to be marked on the surface.
- Set the display on the instrument or on the LEVELMETER to zero.
- The instrument must be turned 180 degrees and slid exactly onto the previously marked position.
- Read the value and divide by two
- Set the display on the instrument or on the LEVELMETER to the so calculated value
- Now reverse the instrument once more. The display should now show the same value as before
but with reversed indication.
1.5 Applications
The following examples are displayed by using LEVELTRONIC and LEVELMETER. Naturally the same
measurements are possible by using MINILEVEL
1.5.1 Measuring absolute
Zero point is to be set by reversal measurement. Now the LEVELTRONIC/LEVELMETER will read deviations
from absolute horizontal position.
Using MINILEVEL NT and LEVELTRONIC NT with a LEVELMETER 2000 the value of the display is shown in
Arcsec or in µm/m.
Using one of the analogue instruments MINILEVEL „classic“ / „NT“ and LEVELTRONIC „classic“ / „NT“ with
connected LEVELMETER (25 or C25/DC) then the values displayed are "digits".
The digits must be multiplied by the value stated on the handle of the LEVELTRONIC and below the LCD on the
LEVELMETER to calculate the correct inclination.
The MINILEVEL „classic“ has two measuring ranges.
Range II is the fine range. The displayed digits must be calculated by multiplying with the correct sensitivity.
Range I is the coarse range. The displayed digits must be calculated by multiplying with the correct sensitivity
and the factor 10.
1.5.2 Measuring relative
It is not always required to set the instrument to zero by reversal measurement (absolute ZERO). If e.g. the
straightness of a line is measured only the relative most of the time the relative straightness is only required.
The same applies when lines, parallels, flatness is measured with the WYLER LEVELSOFT. These are relative
measurements.

Page 13 of 42 pages
1.5.3 Differential respectively reference measurement using an engineer set
Such a measurement is useful or necessary if some of the following cases:
•Measurement on object with vibrations imposed.
•The inclination of the object to be measured will change by the weight of the instrument
•The floor is unstable (heavy loads in the close surroundings
•The relative pitch and roll on a machine must be measured.
The Engineer set usually consists of:
Two LEVELTRONIC „classic“ and a LEVELMETER 25/AC
Picture:
Two LEVELTRONIC „classic“ and a
LEVELMETER 25 (blue cover)
Two LEVELTRONIC „NT“ and a LEVELMETER C25/DC or a
LEVELMETER 2000
Picture:
Two LEVELTRONIC „NT“ and a
LEVELMETER 2000 connected to
laptop equipped with the WYLER
software LEVELSOFT
Remarks concerning NT instruments:
It makes sense to combine a LEVELTRONIC NT and a MINILEVEL NT to an engineer set. With such a
combination a great variety of other measuring tasks requiring a stand-alone instrument may be fulfilled.
Connecting the instruments performing a differential measurement
•One of the instruments is used a measuring instrument and the other as reference instrument.
•The measuring instrument is connected to port "A" the reference instrument to port "B".
•When analogue values are transmitted (LEVELMETER 25 or C25/DC) the sensitivity of the two
instruments must be identical.
•Both instruments must be placed looking the same direction.

Page 14 of 42 pages
Examples for differential / reference measurement:
R= Reference instrument, connected to port „-B“
M= Measuring instrument, connected to port „A“
Fig.7
Rectangularity resp. parallelism of machine spindle in resp. to work table.
For precise square measurements an angular model fitted with magnets in the vertical face should be used.
(Elimination of deformation due to manual pressure).
Fig. 8
Straightness of table motion in relation to the machine’s base. The table must be moved step by step and the
measured value at each step should be noted/recorded after stabilization only.
Fig. 9
Inspection of perpendicularity and parallelism on large structures. Suitable instrument for outdoor applications.
Parallelism, Fig. 10
To conduct high precision measurements of parallelism (e.g. guide way rails), measure each rail step by step
thereby following the procedure described in 3.5.
The reference LEVELTRONIC (R) will compensate for all changes in the objects orientation while
measurements are made. Using this method the instrument (sensitivities up to 1 µm/m) allows determination of
the exact shape of the guide ways.

Page 15 of 42 pages
Torsion, Fig. 11
Torsion in guide ways and workpiece surfaces. The instrument (M) is moved step by step in direction of X,
noting the reading at each step after allowing sufficient time for the instrument to settle. (Attention: Measuring
axis have to be parallel!)
1.5.4 Angular measurements
a) Small angles
The measuring instruments MINILEVEL and LEVELTRONIC are especially well suited for measuring small
angles. It is however to be considered that the larger the angle is getting the larger the linearity error of the
instrument is. It is therefore important to level the object to be measured (e.g. surface plate) as good as possible
in both axis.
b) 90°-angle (squareness)
For measuring 90° angles (square angles) instruments with an angular base can best be used. Before starting a
precision measurement the angular error of the instrument must be determined by reversal measurement on a
suitable object.
After the reversal measurement precision measurement with measuring uncertainty of 3 to 5 µm/m is possible.
The determination of the instrument's angular error is done as follows:
In the WYLER LEVELSOFT 99 a new set-up allows the easy measurement of squareness of rectangular
objects.

Page 16 of 42 pages
Principal procedure of a 90° measurement with WYLER LEVELSOFT
The angular error of the instrument must be determined (optional)
The measurement follows the required set-up (Step length, number of measurements etc.)
After the measurement the respective lines may be adjusted according to different methods. For the following
three methods the angular errors are computed and displayed:
•Method Endpoints
•Method ISO1101
•Method Linear regression (least square)
Ask your local WYLER representative for further information of the software LEVELSOFT
1.5.5 Lines and flatness measurement (manual procedure)
A principal procedure of a measurement of a line with WYLER instruments is described below:
Example:
- Sensitivity of the instrument 1 µm/m
- Length of measuring base 200 mm/ step length 180 mm
- The line to be measured must be divided in equal sizes according to the base available (calculated step
length) Overlapping of the steps is important, otherwise measuring errors are inevitable.
- Place the instrument at the begin of the line measurement
- Slide the instrument step by step along the line to be measured. Note all the measuring results after
allowing enough settling time. Then the line can be drawn as shown below considering the base length
and the sensitivity of the instrument.
This shows the measurement of a line using
LEVELTRONIC „classic“ and a
LEVELMETER 25/AC (blue cover)
This shows the measurement of a line using
LEVELTRONIC „NT“ and a LEVELMETER 2000
Measurements on granite surface plates are done with instruments equipped with hardened steel bases with
dust groves. The sharp edges prohibit dust particles to get between the plate and the base when sliding the
instrument.
The manual measuring and the computing effort is quite big if possible at all and the source of errors large.
Such a task is best done with the WYLER LEVELSOFT 99.

Page 17 of 42 pages
1.6 WYLER software LEVELSOFT PRO
The WYLER software LEVELSOFT PRO well proven package based on the ISO 1101 for measuring lines and
surface flatness constantly upgraded to the demands of the user.
The following measurements can be done with the
WYLER LEVELSOFT PRO in combination with the
correct measuring instruments:
•Lines (Straightness)
•Lines with twist (torsion)
•Parallelism
•Rectangularity
•Surface flatness
•Surface flatness, partial
•Measurement on machine tools
Measurement of line according to ISO1101
with and without twist (torsion)
Measurement of parallel lines according
to ISO1101 with and without twist (torsion)
Surface flatness according to ISO 1101
as well as "U-Jack" method

Page 18 of 42 pages
Rectangularity according to ISO1101
In order to connect the measuring instruments with a PC or Laptop an adapter is required
•LEVELADAPTER SET 2000 (No. 24, for all type of instruments) or
•the special connecting set (Levelsoft no. 24A) to be used with instruments of the NT family together with
a LEVELMETER 2000 and the respective cable set.

Page 19 of 42 pages
2. DETAILED INFORMATION to the various instruments
2.1 MINILEVEL / LEVELTRONIC „classic“
2.1.1 MINILEVEL “classic” A10 / LEVELMETER C25/DC (red cover)
The MINILEVEL "classic" has an integrated display and can be used
as a stand-alone instrument.
Two of the instruments can also be used for differential
measurements in combination with a LEVELMETER C25/DC (red
cover) / Art. no. WYLER: 025-005
IMPORTANT:
The batteries must be removed in the MINILEVEL "classic"
when connected to a LEVELMETER C25/DC (red cover)
MINILEVEL „classic“ A10
Knob
The knob has four positions:
Pos. „0“ Off position
Pos. „B“ Battery check.
Minimum 700 Digit are needed
Pos. „I“ Range I
Value effective = display in digits x factor 10 x sensitivity
Pos. „2“ Range II
Value effective = display in digits x sensitivity
Knob B
(Potentiometer)
Fine adjustment of the zero point

Page 20 of 42 pages
2.1.2 LEVELMETER C25 / DC
Switch (Backside)
"On" / "Off"
Switch for LEVELMETER. The low battery indication
(XX:XX colon) is appearing automatically during
operation if battery power is insufficient.
Top view
LEVELMETER C25 / DC
Potentiometer:
"ZERO" (1)
Enables adjustment of the zero point. The regulating
range is min. +/- 400 digits.
Socket A (2) Input for measuring with one
MINILEVEL „classic“
Socket -B (3) Input for the reference level in differential mode. In
order to prevent interference voltage to channel A ,
input B is switched off when no instrument is
connected.
Socket:
"POWER/OUT (4)
Analogue output 1 mV per digit.
External power supply input.
Important:
All batteries must be removed from the
MINILEVEL “classic” A10 and the
LEVELMETER C25/DC when external
powered (e.g. with Leveladapter 2000)!!
Battery change / Battery check LEVELMETER C25
In case low battery indication (XX:XX colon) is appearing the batteries have to be exchanged.
For exchanging batteries press the cam in arrow's direction as shown in Fig. 4 (use screwdriver) and remove
the cover. Take out batteries by shaking the LEVELMETER C25 and check all contacts for corrosion. Install
new leak proof batteries with a voltage of 1,5V in the battery case as shown on the diagram (see Fig. 5)