Can we implement our company logo with address in the protocol header?


First please make sure you have the latest update of the software LEVELSOFT PRO installed. It can be downloaded for free from our homepage.

If done so you could also have a look into the LEVELSOFT  PRO manual, chapter "printing the measurement" (please also use the latest update for the manuals from our homepage).

First please make sure you have the latest update of the software LEVELSOFT PRO installed. It can be downloaded for free from our homepage

>>products >> software updates >> LEVELSOFT PRO

Please proceed for the update installation according to the detailed explanations.

If done so you could also have a look into the LEVELSOFT PRO manual, chapter 4.7.3  "printing the measurement" (please also use the latest update for the manuals from our homepage).

The letter head of the protocol may be changed according to your requirement.

Attention must be paid to a few things:
The size of your letter head logo should be 2400x220 pixels, (printer quality possibly 300dpi). The logo should be saved as a "*.png" file (Portable network graphic), best is with a transparent background. It should preferably be saved in the subdirectory "LOGOS".

You should now open a measuring pattern or an already measured data sheet.
Then you go to print where you will find an icon at lower left side that says
"Load standard text/logo".
When you click to this icon a box opens, there you have to find your directory with your companies logo and say "open"

This logo in "png" format will then be transmitted to your open data sheet where you can check if OK. From now on all the future printouts will be with the new letter head of yours until you change again.


LEVELMETER 2000 / On the Levelmeter 2000

  • a number of units can not be selected
  • The unit “relative base” (mm/REL; “/REL) can not be selected
  • After a few selected units an error message appears on the display

This situation is possible when a new Reset of the Levelmeter 2000 is required.

A reset must be done in the following procedure:

  • No sensor is connected to the Levelmeter 2000
  • The Levelmeter is turned ON
  • Press the two keys ON/MODE and ENTER simultaneously until on the display a small dot appears. Then release the keys.
  • A number of small dots will show up on the display now and at the end a message "Error" is displayed.

The reset is now successfully finished and the Levelmeter must be working properly. It must be possible to select any of the installed units inclusive the relative base selection.

Can the WYLER AG instruments be used together with the software LabView of National Instruments?



on our homepage under the section „SW Download" a few so called VI's used for running the WYLER AG instruments with Labview are ready to download

What is the difference between an angle and an inclination?


In the section "Technologies / Basics" the required information is available.

Where are the WYLER AG instruments available in Europe and worldwide?


WYLER AG has a net of competent partners all over the world. The required information is found in section „Representatives"

How can I get the latest WYLER AG software updates?


All software updates of the WYLER AG products are available free of charge on the homepage in section "Software / SW Download"

The display of an object measured with WYLER AG Levelsoft shows a convex form whereas the object is supposed to have a concave shape


Most likely a mix-up of the two instruments or the two measuring channels are the cause:

  1. Check the status line on the screen for correct instruments identification
  2. Check if you really have moved the measuring instrument during the measurement and not the reference instrument
  3. Check if the instrument is placed correctly (cable, respectively connector in measuring direction)

The display on the Clinotronic plus always shows OVER


The most common cause for this is the incorrect selection of the measuring unit.

E.g. the measurement is „absolute" but the unit chosen is mm/m. In this case the measured value is quite often out of range because the maximum measurable range under these conditions is only 99.99 mm/m. Quite often the surface on which the instrument is sitting is tilted more than that.

The display on my Clinotronic using the unit mm/m is only about 1/10 of the expected angle


Check the display. If you see two cursors below the figures and one of them is sitting below „REL BAS".If this is the case you have chosen the unit mm/m but with a relative base length. Use ON/MODE and SELECT to change to the correct unit.

What is the allowable zero point deviation of my new spirit level?


All WYLER AG spirit levels are tested and adjusted according to DIN 877, the following requirements are applicable:

up to 50 mm/m, respectively 10 Arcsec.

horizontal: 10 µm/m
vertical: 20 µm/m

above 50 µm/m, respectively 10 Arcsec.

horizontal: L < 100 mm 2/5 of a division
horizontal: L > 100 mm 1/5 of a division
vertical: L < 100 mm 1/1 of a division
vertical: L > 100 mm 1/2 of a division

What type of spirit level is required to measure on a shaft with a diameter of 130mm?


Standard dimensions of prismatic bases
for measurements on shafts

Length of base L B P Possible shaft diameter
100mm 30mm 21mm 17...80mm
100mm 32mm 22mm 17...84mm
150mm 35mm 24.5mm 17...94mm
200mm 40mm 28mm 19...108mm
250mm 45mm 31.5mm 19...120mm
300mm 50mm 35mm 22...135mm
500mm 60mm 42mm 22...160mm


Additional information and hints are found in the brochure "Inclination measurement "YESTERDAY-TODAY-TOMORROW". This brochure can be downloaded, it is found in the section „Manuals"


  • Where can I get batteries type TR164 / 5,4 Volts for MINILEVEL A10?
  • Where can I get a replacement battery 4924/987 - 4.05 Volts for NIVELTRONIC?

How to read actual inclination from precision spirit level?


The sensitivity marked on a spirit level defines the change of inclination, which makes the bubble travel the distance of one graduation.

There is a basic difference between European spirit levels and US spirit levels. US spirit levels define inclination in inch per foot or in inch per 10 or 12 inch. Often, the length of the spirit level is accordingly 12 inch or 10 inch.

European spirit levels define inclination in mm/m, regardless of the levels length. For accurate measurements of actual inclination the spirit level should be reversed on each measurement. Place the spirit level on the surface to be measured. Wait! Note the position of the bubble on the high end. Turn the level by 180° and place the same in precisely the same spot as before. Wait! Note the position of the bubble on the high end. Calculate the average of the two readings, which represents the actual inclination.

Simplified version:
First make sure, that the zero of the spirit levels is correct. To do this, place the level on a levelled surface. Wait! Note the bubble position. Rotate the level by 180° and place in precisely the same spot as before. Wait! Note the bubble position. As the levelled surface may not be accurately level, the bubble may be off-centred. If the spirit level indicates in both positions the same end of the surface being high by the same amount, zero of the level is correct. If the amount differs or the inclination of the surface is indicated in the opposite direction, the spirit level needs correction. If the level is considered to be correct, actual inclination may be read by comparing the distance between both ends of the bubble and the respective zero graduation.

Why always wait?
Be aware that the bubble of a level with high sensitivity may require ½ minute to settle in the final position!

Using precision spirit levels, it is important, that spirit level and measuring objects are at the same temperature. Place the spirit level on the measuring object prior to measurements and allow sufficient time for acclimatisation. Avoid excessive handling or wear gloves.


Using the unit mm/m for a measurement the shown difference is smaller than in reality?


The reason for this effect is the deviation between  inclinations show in mm/m and Radian[Rad] with increasing  inclinations. For small  inclinations the difference is very small. With  inclinations >5° the difference between mm/m and [Rad] (tangent of the angle) is increasing rapidly. For a diffential measurement for  inclinations and an expected difference in the same range the error can not be disregarded. The error for an angle of 10° is approx. 1% and for an angle of 30° it's already 10%.

Therefore for differential measurements >5° the unit [mRad] have to be used.

  • How long do we have to wait prior to measuring?
  • How do we know that the instruments have the same temperature as the object to be measured?

Basically the following points are important:

  • precision measurements are only possible if the instruments and the object to be measured have the same temperature
  • the larger the temperature difference, the longer you have to wait: Examples:

    • The instruments were kept during wintertime at temperatures below 0°C in the car and the object to be measured has 20°C. Waiting time:
      4 ... 6 hours.
    • The instruments were kept during summertime at temperatures above 30°C in a car exposed to the sun and the object to be measured has
      20°C. Waiting time: 3 ... 5 hours

  • When measuring large objects we recommend to place the instruments onto the object already the evening before

To ensure that the instruments and the object have the same temperature, we recommend to carry out the following test-measurement:

  • connect the instruments to the PC
  • start Levelsoft and define a measurement of a line with 20 steps (e.g. steplength 130mm in case of a baselength of 150mm)
  • conduct the 20 measurements WITHOUT moving the instruments
  • the instruments have the same temperature as the object and you can start with the actual measurement IF

    • the variation of the values displayed at the instruments remain within one digit. For a 1μm/m instrument the displayed values should remain within 1μm/m. Calculated for a typical baselength of 150mm the maximum variation of the values should remain within 0.15μm (see also 2nd column of the display of the measuring values of Levelsoft). Therewith the straightness of the “line” should remain within these 0.15μm as well
    • if the graph neither has a concave nor a convex curve

What is the difference between „steplength“ and „baselength“?


The Software Levelsoft uses the expression steplength

When measuring straightness and flatness the measurements may not be carried out base end to base end but have to be overlapping in order to achieve high precision and reproducable results

As an example a picture of the base type 122 which is perfectly suited for high precision flatness measurement (horizontal flat base made of hardened steel with dust grooves, contact surfaces flat, precision lapped, remaining surfaces chromium plated, without magnetic inserts, with two holes Ø 7 mm) :

A measuring base type122 with a length of L = 150mm has a cut-out with length of
L1 = 100mm. Using overlapping, this base has an optimal step length of 126mm. With a very small reduction in accuracy, steplengths of 120 to 145mm can be used as well.

How can the flatness of a circle be measured ?


The Software MT-Soft already contains a standard-function, which solves this measuring task in an optimal way.

Besides the flatness of a single circular surface even double circles can be measured. Furthermore there is the option to measure the flatness of wide circular surfaces by measuring the twist as well.

The software does not only measure the absolute position of the circle in space but also the flatness according to ISO 1101.

How can the flatness of a partial surface be measured?


In the submenu flatness of the software Levelsoft Pro the function „Partial“ can be found. This function allows to adapt a rectangular surface to the object to be measured.

By clicking on single connections of the grid those areas of the surface which should not be measured can be eliminated. Typically these are areas which are damaged or where the surface has holes or where objects are mounted fixed to the surface.

The following points have to be observed:

  • the measuring uncertainty increases with an increased number of deleted connections and crossing points
  • the object to be measured should be turned in such a way that the lower left corner remains as intact as possible in order to minimise the measuring uncertainty

What is the difference between ZEROTRONIC and BlueLEVEL / MINILEVEL NT?


In respect of applications:

BlueLEVEL / MINILEVEL NT are specially designed if measurements of geometrical properties should be performed on different objects and in various places. Thereby the excellent damping, which allows a stable display value even when considerable disturbances (vibrations) are present, is a particular advantage. The inclination measuring instruments are available with a wide variety of precise measuring bases, so that the instruments can be used for most flatness and geometrical measurements without any additional accessories. These instruments are less suitable for outdoor applications under extreme environmental conditions.

The ZEROTRONIC-sensor is particularly appropriate for applications with increased sampling speed. ZEROTRONIC are also specially useful for outdoor applications under difficult conditions. For applications in a differential operation mode on moving objects (e.g. floating objects) the precise synchronisation which is possible with ZEROTRONIC is a precondition for excellent results. ZEROTRONIC allow the adjustment of operating states, sampling rate and the respective integration of measurements according to the requirements in the sensor itself by bus commands. Therefore ZEROTRONIC are also suitable for monitoring geostatic objects (movements in the underground, inclination of parts of buildings, etc.). BlueMETER or LEVELMETER 2000 can put ZEROTRONIC in an operation mode which creates together with the firmware in the display instruments similar results as BlueLEVEL / MINILEVEL NT. Due to the small size and the low weight ZEROTRONIC can be applied under certain circumstances in the place of BlueLEVEL / MINILEVEL NT.

In respect of the generation of the measuring values:


The measuring values are basically generated in an analogue way. Digital components serve for the upgrading of the signal and provide memory for the calibration values, etc. The position of the pendulum is recorded differentially at the same time und is treated in an analogue way. The inclinations determined are passed on digitally.
Advantage: The simultaneous differential recording of the pendulum position and the respective filters render these instruments insensitive against a wide range of vibrations. These instruments are therefore particularly suitable for applications on different objects and in different environments.

The measuring values are generated in digital technology. The digital recording of the pendulum position follows a precise, very fast time sequence. The frequencies created are recorded by counting and are processed mathematically. One and the same oscillator is used for the differential recording of the pendulum position.

Advantage: The precise time sequence as well as the mathematical processing allow a fast data acquisition and a precise synchronisation. The use of one single oscillator for the recording of both frequencies allows a reduction of temperature-dependent errors over a wide temperature range.


Limits of error in compliance with DIN 2276 Part 2 / Electronic inclination measuring devices



Meas. Value = The measured inclination
Full scale = The maximum inclination which the instrument can measure.
Units = The smallest increment (1;5;10 µm/m oder 0.2;1;2 arc. secs.)


Limits of error:
For inclinations smaller than ½ full scale , the limit is 1 % of the measuring value,
or 0.05 % full scale, whichever is larger.

  • For BlueLEVEL the WYLER designated limit is 0.005 % full scale.

  • For BlueLEVEL BASIC the WYLER designated limit is 0.01 % full scale.
    The limit for inclinations > ½ full scale is: 0.01 X (2 X Meas. value – 0.5 X full scale) Measuring range I of MINILEVEL NT is ± 500 units, larger inclinations are informative only.

Do I really need a Granit-Master to measure accurate squareness with an angular instrument?


The horizontal and vertical bases of an angular instrument – e.g. of a BlueLEVEL with a base type 243 – are hand-scraped to an angular error of within ±15 mm/m (with magnets within ±20 mm/m) (valid for a 1 mm/m instrument). The exact value is shown in the respective (optional) SCS test protocoll. This value is of course only correct at the temperature shown in the protocoll! If the temperature changes, then also the angular error changes.

In order to measure squareness accurately at a specific day with a specific temperature, the exact angular error of the instrument that day has to be defined. This requires an accurate Granit Master. With the help of this master and the following formula, the exact angular error can be calculated:

Will magnetic measuring bases allow more precise measurements?

  • For angular measuring bases with built-in magnets the manufacturers tolerance for perpendicularity is 30% larger compared to standard angular bases.  With measurements where the level is supported by magnets and measurements on non ferrous material, where the level is supported by the handle, different geometrical deformations to the measuring base will occur.

  • It is self-explanatory, that measurements with a magnetic measuring base do not depend on the operators sturdy hands. For adjustments, this may be of great advantage. For measurements like flatness or perpendicularity of guide ways demanding the instrument to be moved by several steps, the substantial friction, due to magnetic force, may be a nuisance and may be detrimental to precision.

  • After one single careless application by bringing the level frontally in contact with the object to be measured, the perpendicularity of the measuring base is no longer assured. A substantial shock occurs when the base is contacting the surface!  Always slide magnetic bases sideways onto the measuring object.

  • Magnetic measuring bases are excellent for rotational inspections (pitch and roll), this especially, if only vertical surfaces are available to apply the instrument.

CLINOTRONIC PLUS (Limits of error)

  • How must I interpret the tolerance 2 arc. min. + 1 digit?
  • How much is 1 digit?
  • The limit of error is based on the total measuring range and is 2 arc. min. plus
    1 digit. If the display is set to XX°XX’, this amounts to 2 arc. min. plus 1 arc. min. Total 3 arc. min.

  • If the display is set to XX.XX mm/m, this amounts to 2 arc. min. + 0.02 mm/m or nearly precise 2 arc. min. and 4 arc. sec.

What is the reason for the difference?

  • If units selected are XX.XX mm/m the maximum value which may be displayed is 99.99 mm/m (nearly 5.7°).

  • As errors are present mainly at the maximum inclination, care of of the smaller range is taken.


  • Which is the resolution of CLINOTRONIC Plus?
  • What is the meaning of “max. 0.02 mm/m” or “approximately 0.025 mm/m?

The resolution of the CLINOTRONIC Plus display is limited by the firm ware. This, to avoid clients having expectations, which can't be met by the quality of the measuring bases.

The limitation is 5 arc. sec. or, if different units are set, the next finer value which fits to the least significant digit of the display. (If XX.XX  mm/m are set this is 0.02 mm/m if XX.XX° is set this is 0.01° etc.)

I have an electronic level which reads in µm/m. How can I convert to inch per 12 inch?