WYLER BlueLEVEL-2D User manual

WYLER AG
Im Hölderli
CH-8405 WINTERTHUR
Switzerland
Tel. [phone]
Fax. [phone]
Homepage: http://www.wylerag.com
E-Mail: [email protected]
MANUAL
BlueLEVEL-2D

page 3of 65 pages
CONTENT
SUBJECT
PAGE
1. INTRODUCTION
7
1.1. DESCRIPTION OF THE BLUELEVEL-2D
7
1.2 PREPARATION AND START-UP
7
1.2.1 BATTERIES
7
1.2.2 POSSIBLE CONFIGURATIONS
8
2 STARTING
10
2.1 OPERATION/SHORT DESCRIPTION
10
2.1.1 OVERVIEWKEYBOARD AND DISPLAY
10
2.1.2 HOWTO SWITCH THE INSTRUMENT ONAND OFF
11
2.1.3 KEYS /FUNCTIONS /SHORT DESCRIPTIONS OF EACH SINGLE KEY
11
2.2 DISPLAY
13
2.2.1 SCALING OF THE DISPLAY
13
2.2.2 DISPLAYTYPES
14
2.2.3 BACKGROUND COLOUR
15
2.2.4 BRIGHTNESS
16
2.3 SHORT DESCRIPTION OF THE INDIVIDUALDISPLAYAREAS
17
3 OPERATING INSTRUCTIONS BLUELEVEL-2D
18
3.1 "ZERO-SETTING"/ABSOLUTE ZERO
18
3.1.1 SET ABSOLUTE ZERO (WITH AREVERSAL MEASUREMENT)
18
3.2 SELECTION OF THE MEASURING UNIT /UNIT
20
3.2.1 STANDARD-UNITS
20
3.2.2 UNITSWITH RELATIVE BASELENGTH
20
3.3 FUNCTION HOLD
21
3.4 SELECTION OF THE FILTER UNDER DIFFERENT MEASURING CONDITIONS /
FILTER
22
3.5 ABSOLUTE MEASUREMENT /RELATIVE MEASUREMENT
22
3.5.1 ABSOLUTE MEASUREMENT
22
3.5.2 RELATIVE MEASUREMENT /REL ZERO
23
3.6 MEASURING WITH LIMITS /LIMITS
24
3.7 GROUPING OF INSTRUMENTS TO A MEASURING GROUP IN THE WIRELESS MODE
26
3.7.1 GROUPING VIA CABLE CONNECTION /JOIN
26
3.7.2 GROUPING IN THE WIRELESS MODE /JOIN
26
3.8 TEACH-IN of the IR-trigger (Zapper)
27
4 OPTIONS
28
4.1 SET PIN-CODE
29
4.2 DISPLAY SETTINGS
29
4.3 LOGSCALE
30
4.4 PROGRAMMABLE KEYS
31
4.5 FUNCTIONS ON/OFF
32
4.6 HIDE DISABLED FUNCTIONS ON/OFF
32
4.7 RADIO ON/OFF
33
4.8 GRAVITATION
33
4.9 VERSION FIRMWARE
34
4.10 RESET QUICK CALIBRATION (ONLYPOSSIBLE WITH QUICK CALIBRATION
OPTION)
34
4.11 FACTORY RESET
35
4.12 FUNCTION CHECK
36
APPENDICES
37
A FLOAT CHARTS GENERAL
37
A1 START THE INSTRUMENT /ON/OFF
37
A2 KEY REL.ZERO
38
A3 KEY HOLD, FREEZING OF A MEASURING VALUE /HOLD
39
A4 MENU SELECTION
40
A5 ADJUSTMENT OF THEDISPLAY/DISPLAY
41
A6 MEASUREMENT ABSOLUTE /MODE ABSOLUTE
42

page 4of 65 pages
A7 MEASURING ABSOLUTE CONSIDERING THE ZERO OFFSET /MODE
ABSOLUTE ZERO
43
A8 MEASURING RELATIVE /MODE REL ZERO
44
A9 ADJUSTMENT OF THEMEASURING UNIT /UNIT
45
A10 SETTING OF LIMITS /LIMITS
46
A11 ADJUSTMENT OF FILTER TYPES /FILTER
47
A12 GROUPING OF INSTRUMENTS WITH WIRELESS TRANSMISSION /JOIN
48
A13 LEAVING A GROUP OF INSTRUMETNS /LEAVE
49
B FLOAT CHARTS OPTIONS
50
B1 PIN-CODE-QUERY FOR ACCESS TO THE OPTIONS
50
B2 SET PIN CODE
51
B3 DISPLAY SETTINGS
52
B4 LOGARITHMIC SCALE ON/OFF /LOGSCALE ON/OFF
53
B5 PROGRAMMABLE KEYS "REL ZERO" AND "ZERO/SELECT" /
PROGRAMMABLE KEYS
54
B6 SWITCHING FUNCTIONSON OR OFF /FUNCTIONS ON/OFF
55
B7 SWITCHING THE HIDING OF DISABLED FUNCTIONS ON OR OFF /
HIDE DISABLED FUNCTIONS ON/OFF
56
B8 SWITCH THE WIRELESS TRANSMISSION ON OR OFF /RADIO ON/OFF
57
B9 SWITCH THECOMPENSATION OF GRAVITYON OR OFF /GRAVITATION
COMPENSATION
58
B10 DISPLAY THE FIRMWARE-VERSION /VERSION FIRMWARE
59
B11 RESET TO FACTORY SETTINGS/FACTORY RESET
60
B12 FUNCTION CHECK /DEVICE CHECK
61
C Error Messages
62
D MAINTENANCE
62
D.1 GENERAL
62
D.2 STORAGE/CARE AND HANDLING OF THE BATTERIES
62
D.3 SPARE PARTS /ACCESSORIES
62
E CONFORMITY DECLARATIONS AND APPROVALS
63
F SERVICE AND REPAIR
63
F1 REPAIR OF MEASURING INSTRUMENTS AND DISPLAYUNITS
63
F2 SERVICE -AND MAINTENANCE CONTRACTS
64
Modifications / Änderungen:
Datum /
Date
Geändert durch /
Modified by
Beschreibung der Änderung /
Description of the modification
1.3.2014
HEH
Initial release
12.3.2014
MG
Some corrections
8.1.2015
HEH
New: CONFORMITY DECLARATIONS AND APPROVALS
In the link list below, you will find more information on different important topics:
•Important Product Information (e.g. Important Conformity Declarations and Approvals)
http://www.wylerag.com/en/support/certificates/
•Imagefilms, Instructional videos and Tutorials
https://www.youtube.com/user/wylerag
•Manuals und Compendium
http://www.wylerag.com/en/support/documentation/manuals/
•Representatives WYLERAG/ Product Training
http://www.wylerag.com/en/contact/representatives/

page 5of 65 pages
INDEX
Key word
Chapter
Page
A
ABSOLUTE MEASUREMENT /RELATIVE MEASUREMENT
3.5
22
ADJUSTMENT OF FILTER TYPES /FILTER
A11
47
ADJUSTMENT OF THE DISPLAY /DISPLAY
A5
41
ADJUSTMENT OF THE MEASURING UNIT /UNIT
A9
45
APPENDICES
A
37
B
BACKGROUND COLOUR
2.2.3
15
BATTERIES
1.2.1
7
BRIGHTNESS
2.2.4
16
C
CONFORMITY DECLARATIONS AND APPROVALS
E
63
D
DESCRIPTION OF THE BLUELEVEL-2D
1.1
7
DIRECTIVE ON WASTE ELECTRICAL&ELECTRONIC EQUIPMENT (WEEE)
D4
63
DISPLAY
2.2
13
DISPLAY SETTINGS
4.2
29
DISPLAY SETTINGS
B2
51
DISPLAY THE FIRMWARE-VERSION /VERSION FIRMWARE
B9
58
DISPLAY TYPES
2.2.2
14
E
Error Messages
C
62
F
FACTORY RESET
4.11
35
FLOAT CHARTS GENERAL
A
37
FLOAT CHARTS OPTIONS
B
50
FUNCTION CHECK
4.12
36
FUNCTION CHECK /DEVICE CHECK
B11
60
FUNCTION CHECK /DEVICE CHECK
B12
61
FUNCTION HOLD
3.3
21
FUNCTIONS ON/OFF
4.5
32
G
GENERAL
D1
62
GRAVITATION
4.8
33
GROUPING IN THE WIRELESS MODE /JOIN
3.7.2
26
GROUPING OF INSTRUMENTS TO A MEASURING GROUP IN THE WIRELESS MODE
3.7
26
GROUPING OF INSTRUMENTS WITH WIRELESS TRANSMISSION /JOIN
A12
48
GROUPING VIA CABLECONNECTION /JOIN
3.7.1
26
H
HIDE DISABLED FUNCTIONS ON/OFF
4.6
32
HOW TO SWITCH THE INSTRUMENT ONAND OFF
2.1.2
11
I
INTRODUCTION
1
7
K
KEY HOLD, FREEZING OF A MEASURING VALUE /HOLD
A3
39
KEY REL.ZERO
A2
38
KEYS /FUNCTIONS /SHORT DESCRIPTIONSOF EACH SINGLE KEY
2.1.3
11
L
LEAVING A GROUP OF INSTRUMETNS /LEAVE
A13
49
LOGARITHMIC SCALE ON/OFF /LOGSCALE ON/OFF
B3
52
LOGSCALE
4.3
30
M
MAINTENANCE
D
62
MEASUREMENT ABSOLUTE /MODE ABSOLUTE
A6
42
MEASURING ABSOLUTE CONSIDERING THE ZERO OFFSET /MODE ABSOLUTE
A7
43

page 6of 65 pages
ZERO
MEASURING RELATIVE /MODE REL ZERO
A8
44
MEASURING WITH LIMITS /LIMITS
3.6
24
MENU SELECTION
A4
40
O
OPERATING INSTRUCTIONS BLUELEVEL-2D
3
18
OPERATION/SHORT DESCRIPTION
2.1
10
OPTIONS
4
28
OVERVIEWKEYBOARD AND DISPLAY
2.1.1
10
P
PIN-CODE-QUERY FOR ACCESS TO THE OPTIONS
B1
50
POSSIBLE CONFIGURATIONS
1.2.2
8
PREPARATION AND START-UP
1.2
7
PROGRAMMABLE KEYS
4.4
31
PROGRAMMABLE KEYS "REL ZERO" AND "ZERO/SELECT" /PROGRAMMABLE
KEYS
B4
53
R
RADIO ON/OFF
4.7
33
RELATIVE MEASUREMENT /REL ZERO
3.5.2
23
RESET QUICK CALIBRATION (ONLYPOSSIBLEWITH QUICK CALIBRATION OPTION)
4.10
34
RESET TO FACTORY SETTINGS /FACTORY RESET
B10
59
S
SCALING OF THE DISPLAY
2.2.1
13
SELECTION OF THE FILTER UNDER DIFFERENT MEASURING CONDITIONS /FILTER
3.4
22
SELECTION OF THE MEASURING UNIT /UNIT
3.2
20
SERVICE AND REPAIR
F
63
SET ABSOLUTE ZERO (WITH A REVERSAL MEASUREMENT)
3.1.1
18
SET PIN-CODE
4.1
29
SETTING OF LIMITS /LIMITS
A10
46
SHORT DESCRIPTION OF THE INDIVIDUALDISPLAYAREAS
2.3
17
SPARE PARTS /ACCESSORIES
D3
62
STANDARD-UNITS
3.2.1
20
START THEINSTRUMENT /ON/OFF
A1
37
STARTING
2
10
STORAGE/CARE AND HANDLING OF THE BATTERIES
D2
62
SWITCH THE COMPENSATION OF GRAVITY ON OR OFF /GRAVITATION COMPENSATION
B8
57
SWITCH THE WIRELESS TRANSMISSION ON OR OFF /RADIO ON/OFF
B7
56
SWITCHING FUNCTIONS ON OR OFF /FUNCTIONS ON/OFF
B5
54
SWITCHING THE HIDING OF DISABLED FUNCTIONSON OR OFF /HIDE DISABLED
FUNCTIONS ON/OFF
B6
55
T
TEACH-IN of the IR-trigger (Zapper)
3.8
27
U
UNITSWITH RELATIVE BASELENGTH
3.2.2
20
V
VERSION FIRMWARE
4.9
34
Z
ZERO-SETTING /ABSOLUTE ZERO
3.1
18

page 7of 65 pages
1 INTRODUCTION
1.1 DESCRIPTION OF BLUELEVEL-2D
The BlueLEVEL-2D is a high precision and compact inclination measuring instrument for 2 axes. In
spite of its small outer dimensions the instrument contains 2 inclination sensorsone in X- and one in Y-
direction together with a full graphical and color 2D-display.
Thanksto itsprecision and its size the BlueLEVEL-2D isperfectly suited for the alignment of machines
and machine parts. It can be used as stand-alone unit but can also be used in combination with a
WYLER measuring software.
The Blue Level-2D is designed as a high-precision measuring instrument
The following parameters(among others) can be
set and changed at the BlueLEVEL-2D:
Units
Display of measuring range
Type of display
Filter settings
It is possible to send the measured data via an RS232 port to a PC/laptop and therewith to the WYLER
software LEVELSOFT PRO, MT-SOFT and LabEXCEL software.
The BlueLEVEL-2D containstwo sensors based on the analog measuring principle. The analog
measuring principle isoptimized for the measurement of straightness, flatness, etc. with handheld
instruments because thismeasurement principle providesa stable value very quickly, which is very
important for precise measurements and an efficient measurement process. Furthermore it is very
insensitive to low-frequency interference, ascan sometimes occur in machine tools.
1.2 PREPARATION AND START-UP
PRIOR TO STARTING
Please read thismanual prior to working with the BlueLEVEL-2D. You will get an overview on all the
functions and possibilitiesof thisinstrument. At the same time you get familiar with the handling of the
instrument and wrong handling and specifically the unintentional erasing of the calibration data can
be avoided.
1.2.1 BATTERIES
The batteriesare not inserted in the instrument during shipment. It isstrongly recommended to remove
the batteries during transport.
The battery voltage isshown in the display e.g. 27(2.7 Volt)
Lowest possible battery voltage is 1.7 Volt. If the voltage dropsbelow thisvalue a blinking battery
symbol is shown: The batteriesshould then be exchanged rather soon.
2 pieces 1.5V, Size “C” ALKALINE

page 8of 65 pages
Asan end user you are forced by law to return all used batteriesand accumulators, a disposal through
household waste is prohibited.
Batteries/accumulatorscontaining contaminants are marked with the symbol shown, which clearly
indicates the prohibition of disposal through household waste.
You can dispose of your used batteries/accumulatorsfree of charge at the collecting pointsof your
community, our distribution partnersor at each location selling batteries/accumulators. You thusfulfil
your legal obligation and contribute to the protection of the environment.
1.2.2 POSSIBLE CONFIGURATIONS
Stand-alone instrument
BlueLEVEL-2D connected via an USB cable to a PC/Laptop
A BlueLEVEL-2D connected to a laptop with the RS232 cable. The instrument is
powered from an external power supply

page 9of 65 pages
Two BlueLEVEL-2D connected to a laptop with USB cablesallowing simultaneousdifferential
measurement in 2 directions. The instrumentsare powered from the USB-ports.
A BlueLEVEL-2D connected via Bluetooth to a BlueTC and to a laptop.
Two BlueLEVEL-2D connected via Bluetooth to a BlueTC and to a laptop.
Two BlueLEVEL-2D connected via Bluetooth to a BlueMETER SIGMA and to a laptop.
Please checkthe respective manualsand data sheetsfor detailson the other products shown above.

page10 of 65 pages
2 STARTING
2.1 OPERATION/SHORT DESCRIPTION
2.1.1 OVERVIEW KEYBOARD AND DISPLAY
Colour-display
<ZOOM OUT>
or
<previous option>
<ZOOM IN>
or
<next option>
<ON/OFF>
or
<select menu>
<accept selection>
or
<save entry>
<to print measuring value>
or
<unfreeze and print / transmit
HOLD - inclination value>
or
<escape from the menu>
To use current inclination as
<relative Zero>
<Freeze>

page11 of 65 pages
2.1.2 HOW TO SWITCH THE INSTRUMENT ON AND OFF
The BlueLEVEL-2D features an automatic shut off. In normal mode the instrument isautomatically
switched off 60 minutes after the last key operation. This automatic shut OFF function can be
deactivated with a special ON sequence or when using an external power supply
To switch ON
Keep the key pressed until the display and all LEDs
are lit and release the key. The instrument will automatically shut off
60 minutesafter the last key operation.
If you keep the key pressed for more than 10
seconds the automatic OFF function isdeactivated. This is
indicated by blinking LEDs.
The instrument carriesout a short function test and establishes
connections to other instruments, if any had been available before
switching off the instrument.
The instrument changesinto measuring mode. The settings, which
were used prior to switching the instrument off, are reloaded.
To switch OFF
Keep the key pressed until the display disappears
(about 3 seconds). All settings are kept and will be reloaded again
next time the instrument isswitched on.
2.1.3 KEYS /FUNCTIONS /SHORT DESCRIPTIONS OF EACH SINGLE KEY
ON/MODE - Key
Function - 1 -
To switch the BlueLEVEL-2D ON. When for starting the key is
pressed, a grey picture will appear on the screen and all LEDswill be
illuminated. After releasing the key the BlueLEVEL-2D isswitching to the
measuring mode. The current inclination is displayed in the mode and unit
which was used before switching the instrument OFF. In case of an error the
respective error message isshown in the display. The instrument will
automatically shut of 60 minutes after the last key operation.
If the key ispressed for more than 10 seconds the LEDsstart
blinking and the automatic OFF function is deactivated.
Exception: If the BlueLEVEL-2D ispowered from an external power supply, the
automatic OFF function isdeactivated and the instrument will remain ON.
Function - 2 -
To switch OFF, pressthe key more than 3 seconds, until the
display disappears.
Function - 3 -
With the key you open the menu. Pressing the key repeatedly
will move you through the menu which isindicated by the cursor moving down
to the required function.

page12 of 65 pages
ON/MODE - Key
Function - 4 -
While setting a value with the key the default value can be
recalled.
ENTER –key
Function - 1 -
The key is used to confirm a chosen function or to save a value
entered
Function - 2 -
While in the function "REL ZERO" or "ABS ZERO" the measuring can be
started or an ongoing measuring can be finished by pressing the key
SEND/ESC- key
Function - 1 -
The key is used to send / transmit a measuring value to a PC or
to a printer or similar output device through the RS485 port
Data format OUTport:
[sss xxxxxtt sn.nnnnnn xxxxxtt sn.nnnnnn <cr>]
sss= 0 .. 255 –sequence number
xxxxxtt = Sensor Serial Number and Type
e.g. N2473Dx BlueLEVEL-2D X-Axis
N2473Dy BlueLEVEL-2D Y-Axis
sn.nnnnnn = inclination in rad, e.g. +0.226349
+9.999999 -> Positive Overrange
-9.999999 -> Negative Overrange
Example: 112 N2473Dx -0.021033 N2473Dy +0.002289
Format of transmission:
asynchron, 7Bit, 2 Stopbits, no parity, 9600 Baud
Function - 2 -
Unfreeze of the "HOLD"- function to return to the measuring mode.
At the same time the “frozen” value is sent to the RS 485 port to any connected
device
Function - 3 -
Escape function from the menu

page13 of 65 pages
ZERO/SELECT"+/-" - key
Function - 1 -
The key is used to
changing the scale in the display
increase / decrease the display range
This function can, however, be disabled in the instrument settings.
Function - 2 -
The key is used to select possible adjustments, such as
menu selection
modification of a number
HOLD - key
Function - 1 -
The key serves for "freezing" a measuring value. The value is
displayed until the BlueLEVEL-2D returns to the measuring mode by pressing
the key.
Function - 2 -
In the functions "REL.ZERO" and "ABS.ZERO" the key is used
for reading in the actual measuring value again during the manual entering.
REL ZERO - key
Function - 1 -
The key serves for setting the actual inclination as the
relative Zero.
2.2 DISPLAY
The BlueLEVEL-2D features variousgraphic displayswhich can be scaled according to the
requirements of the measuring task. Also the background colour and the brightness of the display can
be adjusted.
2.2.1 SCALING OF THE DISPLAY
For an optimal use of the graphic display, you have variousoptionsfor scaling.
With the linear scaling the display precision remains constant over the full range. With the keys
the resolution can be changed. Thus also the range being displayed will be
changed.
With the logarithmic scaling the display precision around Zero isthe highest and it is reduced
continuously with higher inclination values. Around Zero the resolution corresponds to the unit
selected.
In the adjustmentsof the instrument you can switch between linear and logarithmic scaling.
Using the key select the menu point [Options] and
confirm with . Select now [Logscale] and confirm with

page14 of 65 pages
Switch the logarithmic scaling ON or OFF using the keys
. The display will show the requested state of
the instrument. Confirm with the key .
The instrument will return to the measuring mode. If the logarithmic
scaling is enabled, the symbol "LOG" will appear below the graph.
2.2.2 DISPLAY TYPES
The display type can be selected in the menu "display".
Using the key select the menu point [Display] and
confirm this selection with .
Select the required display type using the keys
and confirm your selection with the key .
The instrument will return to the measuring mode.

page15 of 65 pages
The following display typesare available in the BlueLEVEL-2D:
Numeric
display
Display
with cross
vial
Display
target
Display
LED-cross
2.2.3 BACKGROUND COLOUR
In the adjustmentsof the instrument the background colour can be selected. Depending on the
brightnessof the colour selected the colour of the fontsand the symbolswill change between black
and white.
Using the key select the menu point [Options] and
confirm with . Select now [Display Settings] and
confirm with
With the keys select the display colour and
confirm the selection with the key .
The instrument will return to the measuring mode.

page16 of 65 pages
2.2.4 BRIGHTNESS
Adjustment of the brightness of the display. Difference between battery operation and the use of an
external power supply.
In the adjustmentsof the instrument the brightnessof the display can be adjusted in order to adapt it to
the environmental conditions and to optimise the battery life time. Thus two different valuescan be set
for the battery operation and the operation with an external power supply
Using the key on mode select the menu point
[Options] and confirm with . Select now [Display
Settings] and confirm with .
Using the keys select [Brightness] for the
adjustment when using an external power supply and [Brightness
Powersave] for the adjustment in battery operation. Confirm this
selection with .
With the keys you can adjust the brightness
required. The display will show the power consumption in a range
from 10% to 100% of the maximum brightness. Only steps of 10%
are possible. Confirm the adjustment with the key .
With the key the default value of 50% will be
recalled.
The instrument will return to the measuring mode.

page17 of 65 pages
2.3 SHORT DESCRIPTION OF THE INDIVIDUAL DISPLAY AREAS
Main
display
In the main display the actual measuring value will be displayed.
Display of the
direction of the
inclination
A symbol indicates the direction of the inclination of the value
displayed.
inclined to the right
(positive inclination)
declined to the right
(negative inclination)
on hold
The HOLD function isactivated, i.e. the measuring value is
"freezed".
ABS
Absolute measurement isactivated.
REL
Relative measurement is activated, i.e. the measuring value is
the difference between the current and the reference plane,
i.e. the relative base.
displaying range
60°
Showsthe selected displaying range. The displaying range
can be adjusted using the keys provided
that thisfunction isenabled in the options.
scale division
5°
Angle between two tick marks.
Scale division
LOG
Indicates that the logarithmic scale isin use. If thissign is
missing, the linear scale isin use.
Serial number
Showsthe serial number of the instrument.
X-Axis: A+Serial number+X
Y-Axis: B+Serial number+Y
Battery voltage
26
Display of the current battery voltage (example 2.6 V). The
lowest possible voltage is1.7 Volt. After a further voltage drop
a blinking battery symbol will appear. The batteries must then
be exchanged immediately. A plug symbol will appear when
the instrument is powered by an external source.
Measuring unit
Display of the measuring unit in use. There are 10 basic units
available, whereasfor each setting variousoptions can be
selected.

page18 of 65 pages
3 OPERATING INSTRUCTIONS BLUELEVEL-2D
The BlueLEVEL-2D offersa wide range of functionsand adjustment possibilities. The list of functions
appearswhen the key is pressed. With the keys the desired function
can be selected and with it will be started. If during 10 secondsno further key is
operated, the function list will be left. With the key a function selected can be
abandoned. Already entered changesof parameterswill be rejected and the BlueLEVEL-2D will return
to the previously used display mode.
Here after the single functionswill be described.
3.1 "ZERO-SETTING"/ABSOLUTE ZERO
Absolute ZERO means that the instrument showsthe measuring value "0" if the measuring surface of
the instrument is aligned exactly according to gravity (true horizontal or true vertical).
3.1.1 SET ABSOLUTE ZERO (WITH AREVERSAL MEASUREMENT)
The absolute zero isused asthe base for absolute inclination measurements. In order to achieve the
best possible precision please observe that the measuring object (support) and the BlueLEVEL-2D
have the same temperature and that the instrument is in operation for several minutes before starting a
measurement. The surface needs to have a very good flatness.
Markthe precise position and particularly the direction of the BlueLEVEL-2D in order to be able to turn
the instrument by 180 degreesand to put it in opposite direction at the very same spot.
The absolute zero will be determined from a reversal
measurement (two measurementsin opposite
direction but at the same spot). Use for thisprocedure
an adequate surface (rigid and stable support, asflat
as possible and ashorizontal aspossible), where you
put the BlueLEVEL-2D. Markthe position and the
direction of the BlueLEVEL-2D precisely and turn it on
the same spot by 180 degrees.
The "ZERO-OFFSET" will be stored in the
BlueLEVEL-2D
EXAMPLE:
With the key select the menu item [Abs ZERO] and
confirm this selection with .
In the display the position of the instrument for the first
measurement will be shown.
Put the BlueLEVEL-2D to the first position and pressthe key
for reading the first measuring value. Alternatively
the first measuring value can also be entered with the zapper.

page19 of 65 pages
During the measurement the display will graphically show the
current measurement.
Confirm the first measurement with the key or with
the zapper. After 15 seconds the value will automatically be read.
After a successful reading of the first measuring value the position
of the instrument for the second measurement will appear in the
display.
Put the BlueLEVEL-2D now to the second position (turn the
instrument by 180 degrees in the horizontal) and press the key
again for reading the second measuring value.
Alternatively the second measuring value can also be entered with
the zapper.
During the measurement the display will graphically show the
current measurement.
Confirm the second measurement with the key or
with the zapper. After 15 seconds the value will automatically be
read.
After termination of the reversal measurement the display for the
actual measurement under consideration of the ZERO OFFSET
will appear on the screen.
Notice:
The value of the "ZERO OFFSET" determined by a reversal measurement correspondsto the deviation
of the zero point of the BlueLEVEL-2D compared to the absolute Zero (gravity). The displayed
measuring value corresponds to
VALUE displayed =
Value of the BlueLEVEL-2D minus "ZERO OFFSET"
The reversal measurement described above should be repeated periodically in order to achieve a high
measuring precision, particularly when the BlueLEVEL-2D hasnot been in use for a longer period.

page20 of 65 pages
3.2 SELECTION OF THE MEASURING UNIT /UNIT
3.2.1 STANDARD-UNITS
You can change the measuring unit of the inclination values displayed. If you start the function [UNIT]
the list of the available measuring unitswill appear. With the keys you can now
select the measuring unit preferred. For memorizing the measuring unit selected you press now the
key . The measuring unit will remain active until you change it again according to the
above procedure.
The following measuring units can be chosen.
xxxx.xx
mm/m
mm per m / 2 decimals
xxx.xxx
mm/m
mm per m / 3 decimals*
xx.xxxx
"/10"
inch per 10 inches/ 4 decimals
xx.xxxx
"/12"
inch per 12 inches/ 4 decimals
xxxx.xx
mRad
Milliradian / 2 decimals
xxx.xxx
mRad
Milliradian / 3 decimals
xxxx.xx
mm/REL
mm in relation to the relative base / 2 decimals
xxx.xxx
mm/REL
mm in relation to the relative base / 3 decimals*
xx.xxxx
"/REL
inches in relation to the relative base / 4 decimals
xxxx.xx
A %o
artillerie-permille
xxxx.xx
%o
permille
xxx.xxx°
DEG
degrees/ 3 decimals
xxx° xx'
DEG
degrees/ minutes
xx° xx' xx"
DEG
degrees/ minutes / seconds
xxxx' xx"
DEG
minutes / seconds
xxxxxx"
DEG
seconds
xxxxx.x"
DEG
seconds*
xxx.xxx
GON
gon / 3 decimals
xx.xxxx
GON
gon / 4 decimals
Depending on the unit selected the last digit will be rounded to 5" or to the nearest lower integer
(e.g.20 µmm/m).
3.2.2 UNITS WITH RELATIVE BASE LENGTH
The unitsmm/REL and "/REL are related to a relative, thismeans selectable, base length. After
selecting one of these units, the relative base length must be entered.
Example: mm/REL / mm in relation to a relative base / 2 decimals.
After the selection of the measuring unit in our example the
stored base length of 1000 mm will appear.
With the keys the proposed base length
can be modified. The newly entered value can finally be
confirmed with the key.
With the key the default value 1000 mm will be
recalled.
The following measurementsare now related to a base length
of 1250 mm.