Mahr Marameter 838 EI User manual

Electronic Caliper Gage for Inside and Outside
Dimensions
3722976
0920 / 0689-89
Marameter 838 EI/EA
Operating Instructions

Mahr GmbH
Carl-Mahr-Straße 1
37073 Göttingen
Tel. [phone]
[e-mail], www.mahr.com

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Confirmation of traceability
We declare under our sole responsibility that this product is in conformity with standards and techni-
cal data as specified in our sales documents (operating instructions, leaflet, catalogue).
We certify that the measuring equipment used to check this product, and guaranteed by our Quality
Assurance, is traceable to national standards.
Thank you very much for your confidence in purchasing this product.
Electronic equipment which was purchased from us after March 23, 2006 can be returned to us. We
will dispose of this equipment in an environmentally-friendly way in accordance with the applicable
EU Directives WEEE (Waste Electrical and Electronic Equipment and the German National - Electrical
and Electronic Equipment Act, ElektroG).
Notes for disposal
Dear Costumer
This measuring instrument contains a non-rechargeable lithium battery.
Spent batteries may not be disposed of in household waste.
Waste batteries contain hazardous substances which can be harmful
to the environment and to human health. Waste batteries and
accumulators must either be returned to an outlet where batteries and
accumulators are sold, or taken to a municipal collection point. There
is a legal obligation on suppliers to take back batteries free of charge.
Please dispose of discharged batteries only, in the collection containers
provided. When disposing of lithium batteries please tape over the
poles.
The removal of batteries is described in the instrument's operating
instructions.
All batteries can be recycled. Valuable raw materials such as iron, zinc
and nickel can be recovered in this way, thereby helping to protect the
environment.
EU Declaration of Conformity
This measuring instrument conforms to the applicable EU directives.
A copy of the Declaration of Conformity can be requested from the following address:
Mahr GmbH, Reutlinger Str. 48,
73728 Esslingen, Germany, or can be downloaded from:
www.mahr.de/de/Leistungen/Fertigungsmesstechnik/Produkte
Permitted use
The electronic caliper gage Marameter 838 EI / EA is to be used to determine length measurements and
can be employed in production, quality control and in the workshop.
Permitted use is subject to compliance with all published information relating to this product. Any other use
is not in accordance with the permitted use. The manufacturer accepts no liability for damages resulting
from improper use. All statutory and other regulations and guidelines applicable to the area of use must be
observed.
In order to achieve the best use of this instrument it is most important that you read the operating instruc-
tions rst.

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
Delivery
- Caliper gage
- 2 Batteries, Type AAA
- Cross tip (Philips) screwdriver (for changing the battery)
- Operating instructions
- Test report
Table of contents
Page
1. Important hints prior to initial operation ...............................................................4
2. Technical Data ....................................................................................................5
3. Functions and description ..................................................................................6
4. Preparing to use the gage / Changing the battery...............................................8
5. General advice on measuring with the caliper gage ..........................................9
6. Handling for dynamic measurements................................................................10
7. Program: Absolut/Relativ, MIN/MAX/HOLD ......................................................11
7.1 Initial State .............................................................................................11
7.2 Absolute and Relative Mode ..................................................................11
7.3 Measuring Programs ..............................................................................11
8. Program Tolerance (TOL) .................................................................................12
8.1 Accessing the tolerance range selection ................................................12
8.2 Selection and conrmation of the tolerance range .................................12
8.3 Deactivation of the tolerance function .....................................................12
9. Key Lock. Deactivation of the key lock .............................................................13
10. Data Logger (D-LOG) .......................................................................................13
11. Back Button ......................................................................................................13
12. SETUP-Menu ...................................................................................................14
12.1 Accessing the setup menu .....................................................................14
12.2 Switch between menu items and selection ............................................14
12.3 Zero Point Correction (OFFSET). .........................................................14
12.4 Tolerance Program (TOL). Setting the tolerance limits ..........................15
12.5 Switching MM/INCH (UNIT). ..................................................................15
12.6 Choice of Scale Division Value (SCALE) ...............................................16
12.7 Auto-Power-OFF (A-OFF) ......................................................................16
12.8 Data Logger (D-LOG) .............................................................................16
12.9 Factory Settings (RESET) ......................................................................18
12.10 Vibration (VIBRAT) .................................................................................18
13. Error Messages ................................................................................................18
14. Accessories ......................................................................................................19

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• In order to ensure a long use of this caliper gage, any contamination on the measuring
instrument must be removed immediately after completion of usage. This can be done
with a dry cloth. Subsequently, to conserve the metal components, these should be lightly
smeared with ushing oil.
• Protect the data output opening with the respective cover when not in use.
• Clean the housing with a dry, soft cloth. Remove heavy soiling with a slightly moistened
cloth. Volatile organic solvents like thinners are not to be used, as these liquids can da-
mage the housing.
• Unauthorized opening of the instrument forfeits the warranty.
• This measuring gage is manufactured with high precision parts and carefully adjusted.
Therefore never try to disassemble or change any of the interior parts of this gage. Prior
to each series of measurements, the gage is to be tested through a comparison measure-
ment with an adjustment ring/gage block!
• When the „Low-Bat“ symbol appears the intended operation or function can no longer be
guaranteed.
• If your actual measuring problem cannot be solved with this particular gage then please
inform us of your measuring task and we can suggest another gage that will fulll your
requirements.
We wish you a satisfactory and long service with your measuring instrument. Should
you have any questions regarding the instrument, contact us and we shall be pleased to
answer them.
• Battery
• not rechargeable
• do not incinerate
• disposeo󰀨asprescribed
!Do not use an electric marking tool on the caliper gage.
1Important hints prior to initial operation

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838 EA Electronic caliper gage for outside dimensions
Order no. 4495450 4495451 4495452
Application range Meb mm 0 - 10 0 - 20 0 - 20
Resolution Skw mm 0,005 0,01 0,01
Error limit G mm 0,015 0,03 0,03
Repeatability limit r mm 0,005 0,01 0,01
Measuring force F N 0,8 - 1,2 1,1 - 1,6 1,1 - 1,6
Measuring contact Ball-ø mm 1,5 1,5 1,5
Protection class IP 67
Max. adjustable OFFSET mm ±0,3 ±0,6 ±0,6
Reference temperature °C +20
Operating temperature °C +10 to +30
Storage temperature °C -10 to +50
Display LCD analog / digital
Data output USB + DIGIMATIC + Bluetooth BT 4.0
Power supply 1,5 V Alkaline Micro AAA / MN2400 / LR03
(2 pieces are required)
2Technical Data
838 EI Electronic caliper gage for inside dimensions
Order no. 4495460 4495461 4495462
Application range Meb mm 5 - 15 10 - 30 20 - 40
Resolution Skw mm 0,005 0,01 0,01
Error limit G mm 0,015 0,03 0,03
Repeatability limit r mm 0,005 0,01 0,01
Measuring force F N 0,8 - 1,2 1,1 - 1,6 1,1 - 1,6
Measuring contact Ball-ø mm 0,6 1,0 1,0
Protection class IP 67
Max. adjustable OFFSET mm ±0,3 ±0,6 ±0,6
838 EI Electronic caliper gage for inside dimensions
Order no. 4495463 4495464 4495465
Application range Meb mm 30 - 50 40 - 60 50 - 70
Resolution Skw mm 0,01 0,01 0,01
Error limit G mm 0,03 0,03 0,03
Repeatability limit r mm 0,01 0,01 0,01
Measuring force F N 1,1 - 1,6 1,1 - 1,6 1,1 - 1,6
Measuring contact Ball-ø mm 1,0 1,0 1,0
Protection class IP 67
Max. adjustable OFFSET mm ±0,6 ±0,6 ±0,6
Reference temperature °C +20
Operating temperature °C +10 to +30
Storage temperature °C -10 to +50
Display LCD analog / digital
Data output USB + DIGIMATIC + Bluetooth BT 4.0
Power supply 1,5 V Alkaline Micro AAA / MN2400 / LR03
(2 pieces are required)

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3Functions and description
Pos. Description
1Moveable measuring arm
2Fixed measuring arm
3Measuring contact
4 Measuring contact
5Operating lever
6LCD display
7Housing
8Operating keys
9Interface port
10 Battery cover
11 Fastening screws

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1
2
3
4
(4.1 - 4.4)
5
6
7
8
9
12
14
13
10
11
15
16
17
19
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Pos. Description
LCD – Display
1Numerical display
2Scale description
3Analog display
4Measuring programs (footer):
4.1 <0> - Relative mode is activated: 0-Preset with setting gage
4.2 MIN - program is activated: Determination of the minimum measured value
4.3 MAX - program is activated: Determination of the maximum measured value
4.4 HOLD - program is activated: Freezing the currently displayed measured value
5Pointer
6Scale interval
7Measuring range / SETUP-Menu
8Tolerance direction
9+/- display for comparison measurement
10 mm - measuring value in millimeter
11 inch - measuring value in inch
12 LOW BATT activated
13 Key lock activated
14 DL Data Logger activated
15 SET Setup - Menu active
16 TOL Tolerance markers
17 Bluetooth-connection activated
18 LED control signal (blue), tolerance display (red/green)
19 Tolerance eld marks

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10
11
For the initial use the batteries provided have to be inserted.
- To open the battery cover 10 loosen the screws 11 by using the screwdriver provided
and insert the batteries (2x AAA).
- Close the battery cover 10 after changing the batteries and tighten the screws 11.
If LOW-BATT 15 appears in the display a change of the battery is
urgently necessary.
Insert the battery ensuring correct polarity!
• The batteries provided are not rechargeable!
• Battery type: 2x 1.5V Micro AAA / MN2400 / LR03
• Close battery 10 cover carefully and pay attention to cleanliness!
• If the measuring instrument is not used for more than 3 months the batteries
must be removed, as a leakage of the battery could cause damage to the
measuring instrument.
4Preparing to use the gage / Changing the battery

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- Please be careful with the measuring contacts (3+4) and the movable operating lever 5
and try to manage the gage in measuring position without touching the workpiece.
- Hold the gage loose during measurement and release the operating lever 5.
- To determine the correct measuring value, please pivot or displace the gage and read from
the display the minimum or maximum deection of the pointer.
- Only the determined measured values that are within the measuring range (see„
1. Technical Data“) of this measuring instrument are correct; outside this measuring range
may not be measured.
- The gage software is available with di󰀨erent features and options which allows an easy
measurement. For more information see Chapter „Measuring programs“.
- Please check the instrument via comparison measurement with a gage block each time
before starting a new measurement series (à zero point adjustment).
- To reduce the measuring uncertainty of the measuring instrument, the measuring
instrument should be calibrated in the measuring program and in-situ in which the
measuring instrument is to be used.
- The instrument starts the rst time with „Absolute – Mode“ and „standard program“.
- When starting the instrument the last mode will be shown.
- The gage switches back into the last used measuring mode, if no key has been
pushed for more than 30s in the setup menu. Changes in the setup menu will be
adopted.
Floating display
Follow up constantly the measured value shown in the display.
When a reverse point is found within a range of ±20 digits the pointer and the suitable
analog bar will be shown.
If a new reversal point of more than ±20 digits is found the analog bar will be adjusted
automatically.
(This program will be started during the rst initial use of this measuring instrument or
after a reset to the factory settings.)
5General advice on measuring with the caliper gage

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Important:
The measuring axis must
be in vertical position to
the measuring surface!
Determination of the minimum measuring value via
pivoting the gage (optimal measurement)
Measuring value Measuring value Measuring
value
too high correct too high
Important:
The measuring axis must
be in vertical position to
the measuring surface!
Determination of the maximum measuring value for
measurement of narrow grooves via lateral displacement
of the gage, where the gage cannot be pivoted vertically.
Measuring value Measuring value Measuring
value
too small correct too small
6Handling for dynamic measurements. Notes on determining the correct measured
values in the MIN / MAX / HOLD programs

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If the „Absolute - Mode“ is activated measurements will be made with reference to the
zero point.
(This program will be started during the rst initial use of this measuring instrument or after a
reset to the factory settings).
If the „Relative - Mode „ is activated measurements will be made with reference to the
reference value (gage block), this must be selected beforehand. This mode is used for
comparison measurement.
Switching between „ Absolute- / Relative - Mode „ can be made in MIN / MAX / HOLD and
TOL.
The Programs MIN / MAX / HOLD can be used for the „Absolute - Mode“ as well as the
„Relative - Mode“.
After selecting the Program is always activated without pressing the operating lever again.
7Program: Absolut/Relativ, MIN/MAX/HOLD
7.1 Initial State. The initial state is a prerequisite for the functioning of all the programs and
setting options described.
7.2 Absolute and Relative Mode. Switching from "Absolute Mode" to "Relative Mode"
7.3 Measuring Programs. Switching measuring programs (MIN/MAX/HOLD)

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The TOL-Program is an assistance for checking tolerances during measurements.
Tolerance eld marks 19 and the tolerance display, LED signal (red/green) 18 are activated.
The red LED lights up for parts exceeding or falling below the tolerance range (rejected parts).
The green LED lights up for parts within the tolerance (good part).
The tolerance function can be activated in each program (MIN, MAX, HOLD).
Fivedi󰀨erenttolerancelimitsareavailablein„Absolute–Mode“aswellas„REL–
Mode“andworkindependently.
Please follow the requested requirements of each program for correct measuring results.
The measuring unit („mm“ and „inch“) and scale interval have to be selected before setting the
tolerance limits otherwise incorrect measuring results may occur.
8.1 Accessing the tolerance range selection
8.2 Selection and conrmation of the tolerance range
8.3 Deactivation of the tolerance function
8Program Tolerance (TOL) Aktiviation and Deaktivation the Tolerance function

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1 sec.
9Key Lock. Deactivation of the key lock. (Key lock reactivates after 20 seconds!)
10 Data Logger (D-LOG). Use Storage of measured values in the internal memory of the
device
11 Back Button. One-step jump back

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12 SETUP Menu
12.1 Accessing the setup menu
12.2 Switch between menu items and selection
12.3 Zero Point Correction (OFFSET). Setting the o󰀨set value

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12.4 Tolerance Program (TOL). Setting the tolerance limits
12.4.1 Selecting the tolerance range
12.4.2 Setting the lower tolerance limit (TOL LO)
12.5 Switching MM/INCH (UNIT). Selection of the unit of measurement
12.4.3 Setting the upper tolerance limit (TOL UP)

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12.6 Choice of Scale Division Value (SCALE). Selection of the scale resolution
12.7 Auto-Power-OFF (A-OFF). Selection of the time after which the device switches to
standby
12.8 Data Logger (D-LOG)
12.8.1 ON Activating the data logger

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12.8.2 PRINT Printout of the saved measurement values
12.8.3 D-OUT Transferring the measurement values to connected peripherals
12.8.4 RESET Resetting the D-LOG memory
12.8.5 OFF Deactivating the data logger

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12.10 Vibration (VIBRAT). Activation and deactivation of tactile feedback
• ERR 06 – Tolerance limit outside the permissible range
• ERR 07 – OFFSET outside the permissible range
The device must be sent to the service centre of Mahr to correct this error
• ERR 08 – Reference point in "Relative Mode" outside the display range
• ERR 09 – No communication with the PC or peripherals
• ERR 10 – Communication breakdown during data transfer
• ERR 11 – Bluetooth connection information has been lost, remove the gauge from all
paired devices and start pairing again!
• ERR 12 – Bluetooth connection could not be established after 30 sec., start pairing
again!
• ERR 13 – Key(s) blocked or keyboard defective! Please make sure that the keyboard is
not being operated
If the error persists, please contact the service center of Mahr
13 Error Messages
12.9 Factory Settings (RESET). Reset the device to factory settings

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14 Accessories
Pos. no. Order no. Description
1 Interface Adapter
2 4495079 USB - V2.0 data cable, incl. interface adapter (1)
3 4495083 DIGIMATIC - V2.0 data cable, incl. interface adapter (1)
4 4495036 USB Bluetooth 4.0 dongle, incl. interface adapter (1)
1
2
3
4

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