Mahr 44 EWR-i Digital Inside Micrometer Instruction Manual

Mahr 44 EWR-i Digital Inside Micrometer

Product Information

Specifications:

• Inductive measuring system

• 10 mm high LCD

• Lithium 3 V battery, type CR2450(N)

• Operating time up to 4 years (~10,000 operating hours without
  wireless operation)

• Sleep mode after 8 minutes (factory setting)

• Protection class IP65 according to DIN EN 60529

  • 6 = Dustproof
  • 5 = Protection against water jets from all directions

• Cable interface (Model 44 EWR)

• Wireless interface (Model 44 EWRi)

  • Bidirectional wireless interface (Integrated Wireless)

  • RF Frequency Band: Channel 1 – 2403 MHz, Channel 2 – 2439 MHz,
    Channel 3 – 2475 MHz

  • Wireless range: max. 6 m

  • Operating temperature: Storage temperature

Product Usage Instructions

1. Permitted Uses:
   The digital inside micrometer 44 EWR(i) is specifically designed for measuring length dimensions in production, quality assurance, and workshop environments. It is essential to adhere to all published information related to the product for permitted use. Any other use beyond its intended purpose is not recommended, as it may lead to damage for which the manufacturer holds no liability. Ensure compliance with statutory regulations and guidelines applicable to the intended use.

2. Scope of Delivery:
   The basic equipment of the digital inside micrometers includes:

   • Measuring element 44 EWR(i)-g
   • Measuring head 44 Ak (measuring heads in sets)
   • Setting rings 355 E in sets
   • Battery CR2450(N)
   • The key for the battery cover
   • Operating instructions

3. Important Information:
   After each use, ensure the micrometer is cleaned of any dirt or debris using a dry cloth. Lubricate metal parts with oil to maintain smooth operation. In case of heavy soiling, gently wipe with a damp cloth, avoiding the use of volatile organic solvents that can damage the housing.

4. Safety Instructions:
   Do not use electric marking tools with the measuring instrument. Ensure the micrometer is not accessible to children.

FAQs

Q: What should I do if the spindle of the micrometer gets stuck in the limit stop?

A: Use the red release ring on the micrometer to loosen a stuck spindle. Cover it with the provided protective cap after release.

Q: How do I ensure accurate measurements with the micrometer?

A: Ensure that the measuring head 44 Ak is in full contact over its entire length for precise measurements.

Q: What is the recommended way to clean the micrometer?

A: Clean any dirt or debris with a dry cloth and lubricate metal parts with oil. For heavy soiling, use a damp cloth and avoid volatile organic solvents.

Q: How can I get assistance if I have questions about using the measuring instrument?

A: Our technical consultants are available to assist you with any questions or concerns you may have regarding the use of the measuring instrument.

Permitted uses

The digital inside micrometer 44 EWR(i) is used to measure length dimensions in production, quality assurance and the workshop. Permitted use is subject to compliance with all published information relating to this product. Any other use is not by the permitted use. The manufacturer accepts no liability for any damage resulting from improper use. All statutory and other regulations and guidelines applicable to the area of use must be observed.

Before operating the instrument, we recommend that you read these operating instructions carefully.

Scope of delivery

The basic equipment of the digital inside micrometers includes:

• Measuring element 44 EWR(i)-g
• Measuring head 44 Ak (measuring heads in sets)
• Setting rings 355 E in sets
• Battery CR2450(N)
• The key for battery cover
• Operating instructions

Important information

• To ensure long-lasting use of the measuring instrument, dirt must be removed with a dry cloth after use. Then lubricate the metal parts with oil.
• Dirty housing should be cleaned with a dry, soft cloth after use.
• In case of heavy soiling, wipe with a damp cloth. Volatile organic solvents such as thinners should be avoided as these liquids can damage the housing.
• Do not continue to turn the spindle when the stop is reached, otherwise damage may occur. Use the red release ring on the micrometer to loosen a spindle that is stuck in the limit stop, see image.
• When the cable port is not in use (with the corresponding model), cover it with the protective cap provided.
• The specified error limits are only met if the measuring surfaces of measuring head 44 Ak are in contact over their entire length.
• Opening the instrument voids the warranty.
• After the “ ” symbol appears, proper function is no longer guaranteed.
• We wish you every success with the use of your measuring instrument.
• If you have questions, our technical consultants will be happy to assist you.

Safety instructions

• Battery
  • Not rechargeable.
  • Do not incinerate.
  • Dispose of as prescribed.
• Do not use an electric marking tool.
• The measuring instrument must not be accessible to children.

Technical Data

• Inductive measuring system 10 mm high LCD

• Lithium 3 V battery, type CR2450(N)

  • Operating time up to 4 years,
    approx. 10,000 operating hours without wireless operation

• Reduced operating time with wireless operation!
  (Example: wireless transmission of 4 values/min ⇒ approx. 4,000 operating hours)

• Sleep mode after 8 min. (factory setting)

• Protection class IP65 according to DIN EN 60529

  • 6 = Dustproof
  • 5 = Protection against water jets from all directions

• Cable port (model 44 EWR)

  • Bidirectional data transfer plus external power supply via USB data cable of type DK-U1
  • Unidirectional data transfer in Digimatic format with data cable of type DK-D1

Wireless interface (model 44 EWRi)

• Bidirectional wireless interface (Integrated Wireless)
• Radiofrequency
  • Channel 1: 2,403 MHz
  • Channel 2: 2,439 MHz
  • Channel 3: 2,475 MHz
• Transmission distance
  • max. 6 m
  • max. transmission power (EIRP): 4 dBm
  • The quality of the connection depends on the operating environment.
• Operating temperature + 10 °C – + 40 °C
• Storage temperature – 10 °C – + 60 °C

44 EWR(1)-g (6-20 mm)

44 EWR(i)-g (20-100 mm/100-200 mm)

• when the measuring surfaces make contact over their entire length
• with extension 44 Av.

Description

1. Basic unit 44 EWR(i)
2. Measuring depth extension 44 Av
3. Setting ring 355 E*
4. Measuring head 44 Ak
5. Measuring jaws
6. Spindle
7. Display
8. Release the ring to loosen the spindle
9. Ratchet
10. Operating keys
11. Battery compartment
12. M3 thread for mounting the clamping plate for measuring the instrument holder
    • Accessory part, only included in sets

Commissioning

1. Please observe the following when fitting the 44 Ak measuring head (4) or the 44 Av measuring depth extension (2):
2. Turn the sleeve of the ratchet (9) anticlockwise to move the spindle (6) towards the display until you feel that more force is required to do so.
3. Screw in by hand the 44 Ak measuring head (4) or the 44 Av measuring depth extension (2) carrying the measuring head.
4. Clean both the measuring surfaces (5) and the setting ring (3).
   • Insert the measuring head/measuring depth extension into the setting ring and turn the sleeve of the ratchet (9) clockwise until the spindle stops moving.
   • In case the spindle (6) got jammed, loosen the ratchet (9) by turning the red ring (8) clockwise (see figure in section 3).
5. Accept the actual dimension of the setting ring as the current PRESET value (see sections 9.2 and 9.5.4 for this).

If necessary, unscrew the 44 Ak measuring head (4) or the 44 Av measuring depth extension (2) by hand. In case it cannot be unscrewed by hand, please use the hooked wrench supplied with the micrometer.

Inserting or changing the battery

1. Insert battery
2. The measuring instrument will turn on automatically after battery replacement.
3. Please use only “Renata” or “Varta” batteries.

Functions

Intuitive menu navigation

Auto ON/OFF
Switching-off (reference is not lost, PRESET remains in memory)

Sleep mode (after 8 min of pausing)

ABSOLUTE/RELATIVE measuring modes
Depending on the measuring task, the micrometer screw can be used to measure in two different operating modes.

ABSOLUTE (PRESET) measuring mode (PRI – PRIII)

• Three different PRESET values can be set (shown on display as “PRI” – “PRIII”).

• The displayed measured value corresponds to the actual diameter (absolute dimension).

• The exact diameter of the respective setting ring (in a size matching the measuring head 44 Ak used) is stored as the PRESET value.

• Calibration in the setting ring:
  Press the PR key briefly (< 1 sec.).

  • The display shows the value of the currently active PRESET (“PRI”, “PRII” or “PRIII”).

Switching between PRI, PRII and PRIII

• Press and hold the 0 ABS key (> 1 sec.):
• The PRESET value switches between “PRI”, “PRII” and “PRIII”.
• “PR1”, “PR2” or “PR3” is briefly shown on the display as confirmation.

RELATIVE measuring mode (REL)

• Press the 0 ABS key briefly (< 1 sec.):
• “0” setting of the display at any position for a step or comparative measurement.
  • “REL” appears in the display.

In the relative measuring mode, the tolerance function (TOL) is not allowed. If the tolerance function (TOL) is selected, the most recent PRESET value will be displayed.

Back from RELATIVE measuring mode to the ABSOLUTE (PRESET) mode

• Press and hold the 0 ABS key (> 1 sec.).
• At any point, the system switches from the relative measuring mode (REL) to the active PRESET value (PRI – PRIII) for ABSOLUTE measurement.
  • The display shows “PRI”, “PRII” or “PRIII”.

DATA/HOLD function

HOLD

• Freezes the displayed measured value after the measurement.
• This function is useful for measuring tasks in which the display cannot be viewed during the measuring process, e.g., when measuring in the machine.

DATA
When data transmission is active or the data cable has been plugged in, HOLD is disabled and instead, a data command is initiated.

• Data transfer with cable
• Wireless connection

TOL function

Tolerance and warning limits display
With this function, good parts/rejects and tolerance deviations of a dimension can be identified quickly.

To this end, tolerance limit values (max. tolerance range < 1.6 mm) and a warning limit (choose from 0% / 10% / 20% / 30%) can be set.

• Three different tolerances can be stored.
• Each tolerance is permanently coupled to a PRESET value (PRI – PRIII).
• The display shows the pairing with PRI – PRIII + TOL.

In the relative measuring mode, the tolerance function (TOL) is not allowed. If the tolerance function (TOL) is selected, the most recent PRESET value will be displayed.

Switching the display function on and off:

Changing a tolerance or the PRESET value:

Possible displays:

• The measuring result is within the tolerance limits.
• The measuring result is above the upper warning limit. The arrow flashes when the preset warning limit is reached.
• The measuring result is below the lower warning limit: The arrow flashes when the preset lower warning limit is reached.
• The measuring result is outside of the tolerance limit.

Example of warning limit based on tolerance:

• Tolerance field 100 μm (100%)
• Warning limit 20%

The tolerances are set in the menu; “Structure diagram of menu functions”.

MENU

Navigating the menu and setting parameters

• Switches to the neighboring menu item or to the neighboring digit when entering numbers
  • < 1 sec. next menu item/next digit

  • 1 sec. back to the previous menu item/previous digit

• Changes the displayed parameter value/or the numerical value of a digit:
  • < 1 sec number is incremented

  • 1 sec number is decremented

• Confirm/accept

Menu functions

1. UnLoc / Loc Cancels/activates key lock
2. unit Toggles between the length units mm and inch
3. PRESET Sets the absolute PRESET value
4. TOL Sets tolerance and warning limit
5. ** diGi 0 Enables/disables Digimatic data transfer
6. ** USB Detects USB data cable automatically
7. • d OFF Enables/disables wireless data transmission
8. • CH 01 Sets radio channel
9. • ECO 0 Switches ECO mode on/off
10. OFF 8 Selects the sleep mode setting (in minutes)
11. FA-SEt Resets the factory settings
    • • Model 44 EWRi only
    • ** Model 44 EWR with data output only

Structure diagram of menu functions

Enter PRESET value
Three PRESET values (display PRI/PRII/PRIII) can be defined allowing for different measuring heads.

Data communication
Accessories for 44 EWR inside micrometers with data output and 44 EWRi:

• 44 EWR: USB data cable DK-U1 Order no. 4102603
• 44 EWRi: ‘i-stick’ wireless receiver Order no. 4102220
• MarCom Software
  • For the flexible transmission of the measured values and the easy configuration of your measuring instrument.
  • Download free of charge: www.mahr.com/marcom.

Data output via (USB/Digimatic) cable
Individual data transfer by data cable:

• Type DK-U1 (USB) Order no. 4102603
• Type DK-D1 (Digimatic) Order no. 4102606

Operating instructions with interface descriptions and duplex commands (only for DK-U1) are included with data cable or available to download free of charge at: https://metrology.mahr.com/en-us/products

Data output via Integrated Wireless

• Control Integrated Wireless directly using a program of your own.
• Driver packs as programming basis (.dll in C++ or C#).
• Request for free download by email to: info@mahr.com.

Setting operations via the MarCom software

Download free of charge: www.mahr.com/marcom.

1. Adjusting parameters
   PRESET, tolerance, and warning limit values, for example, can be set quickly and easily using the MarCom software

2. Locking functions

   • To protect the micrometer against incorrect operation during use, individual keys and menu settings can be locked via the MarCom software.
   • The thus locked functions can only be unlocked via the MarCom Software.

Display Messages

“Error”- message
Incorrect tolerance settings.

• “Error / Hi-Lo”
  • Upper limit ≤ lower limit.
• “Error / t-SPAn”
  • Max. tolerance range of 1.6 mm exceeded.

/operating keys locked

1. “Loc” appears in the display.
   • The LOCK (key lock) menu function is enabled.

d Loc/individual functions locked

1. “d Loc” appears in the display.
2. Individual functions were locked via the data interface of a PC, e.g., by the MarCom Professional software.
   • See the online help for the “MarCom Professional” software (“Device parameters”) or the operating instructions for the data cable type DK-U1 / DK-D1.

Battery symbol/”bAt lo” message

1. The battery symbol /”bAt lo” appears on the display.
   • Change the battery.

“no Fct”- error message
When the TOL function is enabled, zero setting is not possible!

1. “no Fct/tolAct”
   • The TOL function can only be used in PRESET mode, as the tolerance settings only hold for the PRESET values.

Confirmation of traceability

• We declare, with sole responsibility, that this product conforms with standards and technical data as specified in our sales documents (operating instructions, leaflet, catalog).
• We certify that the testing equipment used to check this product, and guaranteed by our Quality Assurance, is traceable to national standards.
• Thank you for placing your trust in us by purchasing this product.

Information on disposal

Dear customer,
This instrument contains a non-rechargeable lithium battery. If the battery is dead, it must not be disposed of in household waste!

• Old batteries may contain pollutants that can harm the environment and health. Please return waste (rechargeable) batteries to the retailer or to the recycling centers of the municipalities. The return is free of charge and required by law. Please throw only discharged batteries into the containers provided and tape the poles of lithium batteries.
• The removal of the battery is described in the operating instructions of the instrument.
• All batteries are recycled. In this way, valuable raw materials such as iron, zinc, or nickel can be recovered. Battery recycling helps protect the environment.
• Old electronic equipment that was purchased from Mahr after March 23, 2006, can be returned to us. We will dispose of this equipment in an environmentally-friendly way.
• The valid EU directives (WEEE, RoHS) apply.

EU/UK Declaration of Conformity

This measuring instrument complies with the applicable EU/UK directives.

A copy of the current Declaration of Conformity can be downloaded from https://metrology.mahr.com/en-us/products by selecting the relevant product or can be requested from the following address: Mahr GmbH, Carl-Mahr-Straße 1, D-37073 Göttingen, Germany.

We reserve the right to make changes to our products, especially due to technical improvements and further developments. All illustrations and technical data are therefore without guarantee.

© by Mahr GmbH.

Japanese Radio Law and Japanese Telecommunications Business Law Compliance
This device should not be modified (otherwise the granted designation number will become invalid).

FCC Compliance

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:

1. This device may not cause harmful interference, and
2. This device must accept any interference received, including interference that may cause undesired operation.

NOTE:
This equipment has been tested and found to comply with the limits for a Class B digital device, under part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.

This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used by the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and the receiver.
• Connect the equipment to an outlet that is on a different circuit from the receiver.
• Consult the dealer or an experienced radio/TV technician for help.

The Micromar 44EWRi is labeled with its own FCC ID, N3344EWRI.

Industry Canada Compliance
This device complies with Industry Canada license-exempt RSS standard( s). Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device.

The Micromar 44EWRi is labeled with its own IC, 10315A-44EWRI.

References

• Mahr Group
• MarCom Professional
• Produkte
• Products

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