Mahr DK-D1 Dial Indicator
Permitted use
The digital indicators 1086 R(i) / 1087 R(i) are 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.
Before commissioning the device, we recommend you read these operating instructions carefully.
Scope of delivery
The basic equipment for digital indicators includes:
- Digital indicator
- Battery type CR 2450
- Screwdriver to open the battery compartment— Operation manual
Important information
- To guarantee the long-term use of the measuring instrument, any dirt on the outside micrometer must be removed with a dry cloth when no longer in use.
Then preserve the metal parts with oil. - A contaminated housing should be cleaned with a dry, soft cloth after use. Use a damp cloth if the contamination is severe. Vola-tile, organic solvents, such as diluting agents, should be avoided as these liquids can damage the housing.
- If necessary, clean the measuring pin with a cloth dampened with alcohol. Do not apply any oil to the measuring pin.
- Seal the data output if it is not being used.
- The measuring instrument should be operated in a dial indicator holder or corresponding device. A holder with a slotted mounting bore of 8 mm or 0.375” is recommended (see Fig. 7.1.a).
- All warranty claims will be void if the device is opened.
- Once the “
” symbol is displayed, the intended function is no longer guaranteed.
We wish you every success when using your measuring instrument. If you have any 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
Lithium 3 V battery, type CR2450(N)
Operating time up to 3 years, approx. 6,000 operating hours without wireless operation
Reduced operating time with:
- wireless operation
Example: wireless transmission of 4 values/min => approx. 2,000 operating hours
- LED display
Sleep mode after 8 min. (factory setting)
Protection class according to DIN EN 60529 (depending on model used)
IP42:
- 4 = Solid particles > 1.0 mm
- 2 = Dripping water when tilted at 15°
IP64:
- 6 = Dustproof
- 4 = Splashing of water from any direction
Cable port (all models)
- 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 – Integrated Wireless (models 108x Ri/WRi/Ri-HR/ZRi)
- Bidirectional wireless interface (Integrated Wireless)
RF frequency band
- Channel 1 2403 MHz
- Channel 2 2439 MHz
- Channel 3 2475 MHz
- Transmission path max. 6 m
- Max. transmission power (EIRP): 4 dBm
The quality of the connection is dependent on the operational environment.
On digital indicators with a wireless interface, the RS232C is only active if the wireless interface is deactivated.
- Operating temperature + 10°C … + 40°C
- Storage temperature – 10°C … + 60°C
| Type | Measuring range mm | a mm | b mm | c mm |
| 1086 R(i)(-HR) / ZRi | 12,5 | 126,2 | 23,3 | 13,6 |
| 1086 R(i)(-HR) / ZRi | 25 | 151,8 | 23,3 | 26,5 |
| 1086 R(i) | 50 | 267,7 | 39,8 | 52,5 |
| 1086 R(i) | 100 | 420,7 | 90,8 | 103,5 |
| 1086 WR(i) | 12,5 | 144,2 | 21,3 | 28,1 |
| 1086 WR(i) | 25 | 191,9 | 21,3 | 50,0 |
| 1087 R(i)(-HR) / ZRi | 12,5 | 126,2 | 23,3 | 13,6 |
| 1087 R(i)(-HR) / ZRi | 25 | 151,8 | 23,3 | 26,5 |
| 1087 WRi | 12,5 | 144,2 | 21,3 | 28,1 |
| µMax µm 1087 Ri | 6,35 | 120,2 | 23,3 | 7,6 |
| Type | Measuring range | Resolution value, switchable | Scale graduation value, switchable | Mar Connect interface | Radio interface | Measuring force | Error limit (measuring range) | Error limit (partial measuring range) |
Error limit (hysteresis) | Repeatability | Degree of protection | Clamping shaft | Mounting thread | Order. no. | ||
| mm | (inch) | mm | (inch) | MPL (N) | MPEE (μm) | MPEP (μm) | MPEH (μm) | MPER (μm) | Ø | |||||||
| 1086 R | 12,5 | (.5“) | 0,0005 … 0,01 | .00002″ … .0005″ | = | 0,65 – 0,90 | 4 | 2 | 2 | 1 | IP 42 | 8 mm | M2,5 | 4337700 | ||
| 1086 R | 25 | (1“) | 0,0005 … 0,01 | .00002″ … .0005″ | = | 0,65 – 1,15 | 4 | 2 | 2 | 1 | IP 42 | 8 mm | M2,5 | 4337701 | ||
| 1086 R | 50 | (2“) | 0,0005 … 0,01 | .00002″ … .0005″ | = | 1,25 – 2,70 | 7 | 2 | 3 | 1 | IP 42 | 8 mm | M2,5 | 4337702 | ||
| 1086 R | 100 | (4”) | 0,0005 … 0,01 | .00002″ … .0005″ | = | 1,80 – 3,50 | 8 | 2 | 3 | 1 | IP 42 | 8 mm | M2,5 | 4337703 | ||
| 1086 Ri | 12,5 | no | 0,0005 … 0,01 | – | = | = | 0,65 – 0,90 | 4 | 2 | 2 | 1 | IP 42 | 8 mm | M2,5 | 4337710 | |
| 1086 Ri | 25 | no | 0,0005 … 0,01 | – | = | = | 0,65 – 1,15 | 4 | 2 | 2 | 1 | IP 42 | 8 mm | M2,5 | 4337711 | |
| 1086 Ri | 12,5 | (.5“) | 0,0005 … 0,01 | .00002″ … .0005″ | = | = | 0,65 – 0,90 | 4 | 2 | 2 | 1 | IP 42 | 8 mm | M2,5 | 4337720 | |
| 1086 Ri | 25 | (1“) | 0,0005 … 0,01 | .00002″ … .0005″ | = | = | 0,65 – 1,15 | 4 | 2 | 2 | 1 | IP 42 | 8 mm | M2,5 | 4337721 | |
| 1086 Ri | 50 | (2“) | 0,0005 … 0,01 | .00002″ … .0005″ | = | = | 1,25 – 2,70 | 7 | 2 | 3 | 1 | IP 42 | 8 mm | M2,5 | 4337722 | |
| 1086 Ri | 100 | (4”) | 0,0005 … 0,01 | .00002″ … .0005″ | = | = | 1,80 – 3,50 | 8 | 2 | 3 | 1 | IP 42 | 8 mm | M2,5 | 4337723 | |
| 1086 Ri | 25 | (1“) | 0,0005 … 0,01 | .00002″ … .0005″ | = | = | without spring | 4 | 2 | 2 | 1 | IP 42 | 8 mm | M2,5 | 4337731 | |
| 1086 ZRi | (12,5) | .5“ | 0,0005 … 0,01 | .00002″ … .0005″ | = | = | 0,65 – 0,9 | 4 | 2 | 2 | 1 | IP 42 | .375″ | 4-48 UNF | 4337910 | |
| 1086 ZRi | (25) | 1“ | 0,0005 … 0,01 | .00002″ … .0005″ | = | = | 0,65 – 1,15 | 4 | 2 | 2 | 1 | IP 42 | .375″ | 4-48 UNF | 4337911 | |
| 1086 WR | 12,5 | (.5“) | 0,0005 … 0,01 | .00002″ … .0005″ | = | 0,65 – 1,40 | 4 | 2 | 2 | 1 | IP 64 | 8 mm | M2,5 | 4337740 | ||
| 1086 WR | 25 | (1“) | 0,0005 … 0,01 | .00002″ … .0005″ | = | 1,00 – 2,25 | 4 | 2 | 2 | 1 | IP 64 | 8 mm | M2,5 | 4337741 | ||
| 1086 WRi | 12,5 | (.5“) | 0,0005 … 0,01 | .00002″ … .0005″ | = | = | 0,65 – 1,40 | 4 | 2 | 2 | 1 | IP 64 | 8 mm | M2,5 | 4337750 | |
| 1086 WRi | 25 | (1“) | 0,0005 … 0,01 | .00002″ … .0005″ | = | = | 1,00 – 2,25 | 4 | 2 | 2 | 1 | IP 64 | 8 mm | M2,5 | 4337751 | |
| 1086 Ri-HR | 12,5 | no | 0,0001 … 0,01 | – | = | = | 0,65 – 0,9 | 1,8 | 0,5 | 0,6 | 0,5 | IP 42 | 8 mm | M2,5 | 4337760 | |
| 1086 Ri-HR | 12,5 | (.5“) | 0,0001 … 0,01 | .00001″ … .0005″ | = | = | 0,65 – 0,9 | 1,8 | 0,5 | 0,6 | 0,5 | IP 42 | 8 mm | M2,5 | 4337770 | |
| 1086 Ri-HR | 25 | (1“) | 0,0001 … 0,01 | .00001″ … .0005″ | = | = | 0,65 – 1,15 | 2,4 | 0,5 | 0,7 | 0,5 | IP 42 | 8 mm | M2,5 | 4337771 | |
| 1086 R | 12,5 | (.5“) | 0,01 | .0005″ | = | 0,65 – 0,90 | 20 | 20 | 20 | 10 | IP 42 | 8 mm | M2,5 | 4337780 | ||
| 1086 R | 25 | (1“) | 0,01 | .0005″ | = | 0,65 – 1,15 | 20 | 20 | 20 | 10 | IP 42 | 8 mm | M2,5 | 4337781 | ||
| 1086 R | 50 | (2“) | 0,01 | .0005″ | = | 1,25 – 2,70 | 20 | 20 | 20 | 10 | IP 42 | 8 mm | M2,5 | 4337782 | ||
| 1086 R | 100 | (4”) | 0,01 | .0005″ | = | 1,80 – 3,50 | 20 | 20 | 20 | 10 | IP 42 | 8 mm | M2,5 | 4337783 | ||
| 1086 Ri | 12,5 | (.5“) | 0,01 | .0005″ | = | = | 0,65 – 0,90 | 20 | 20 | 20 | 10 | IP 42 | 8 mm | M2,5 | 4337790 | |
| 1086 Ri | 25 | (1“) | 0,01 | .0005″ | = | = | 0,65 – 1,15 | 20 | 20 | 20 | 10 | IP 42 | 8 mm | M2,5 | 4337791 | |
| 1087 R | 12,5 | (.5“) | 0,0005 … 0,01 | .00002″ … .0005″ | = | = | 0,65 – 0,90 | 4 | 2 | 2 | 1 | IP 42 | 8 mm | M2,5 | 4337800 | |
| 1087 R | 25 | (1“) | 0,0005 … 0,01 | .00002″ … .0005″ | = | = | 0,65 – 1,15 | 4 | 2 | 2 | 1 | IP 42 | 8 mm | M2,5 | 4337801 | |
| 1087 Ri | 12,5 | no | 0,0005 … 0,01 | – | = | = | = | 0,65 – 0,90 | 4 | 2 | 2 | 1 | IP 42 | 8 mm | M2,5 | 4337810 |
| 1087 Ri | 25 | no | 0,0005 … 0,01 | – | = | = | = | 0,65 – 1,15 | 4 | 2 | 2 | 1 | IP 42 | 8 mm | M2,5 | 4337811 |
| µMax µm 1087 Ri | 6,35 | (.25“) | 0,0005 … 0,01 | .00002″ … .0005″ | = | = | = | 0,55 – 0,70 | 2,5 | 2 | 2 | 1 | IP 42 | 8 mm | M2,5 | 4337969 |
| 1087 Ri | 12,5 | (.5“) | 0,0005 … 0,01 | .00002″ … .0005″ | = | = | = | 0,65 – 0,90 | 4 | 2 | 2 | 1 | IP 42 | 8 mm | M2,5 | 4337820 |
| 1087 Ri | 25 | (1“) | 0,0005 … 0,01 | .00002″ … .0005″ | = | = | = | 0,65 – 1,15 | 4 | 2 | 2 | 1 | IP 42 | 8 mm | M2,5 | 4337821 |
| 1087 Ri | 50 | (2“) | 0,0005 … 0,01 | .00002″ … .0005″ | = | = | = | 1,25 – 2,70 | 7 | 2 | 3 | 1 | IP 42 | 8 mm | M2,5 | 4337822 |
| µMaxµm 1087 Ri | (6,35) | .25“ | 0,0005 … 0,01 | .00002″ … .0005″ | = | = | = | 0,55 – 0,70 | 2,5 | 2 | 2 | 1 | IP 42 | .375″ | 4-48 UNF | 4337969 |
| 1087 ZRi | (12,5) | .5“ | 0,0005 … 0,01 | .00002″ … .0005″ | = | = | = | 0,65 – 0,90 | 4 | 2 | 2 | 1 | IP 42 | .375″ | 4-48 UNF | 4337970 |
| 1087 ZRi | (25) | 1“ | 0,0005 … 0,01 | .00002″ … .0005″ | = | = | = | 0,65 – 1,15 | 4 | 2 | 2 | 1 | IP 42 | .375″ | 4-48 UNF | 4337971 |
| 1087 WRi | 12,5 | (.5“) | 0,0005 … 0,01 | .00002″ … .0005″ | = | = | = | 0,65 – 0,90 | 4 | 2 | 2 | 1 | IP 64 | 8 mm | M2,5 | 4337830 |
| 1087 Ri-HR | 12,5 | no | 0,0001 … 0,01 | – | = | = | = | 0,65 – 0,9 | 1,8 | 0,5 | 0,6 | 0,5 | IP 42 | 8 mm | M2,5 | 4337840 |
| 1087 Ri-HR | 12,5 | (.5“) | 0,0001 … 0,01 | .00001″ … .0005″ | = | = | = | 0,65 – 0,9 | 1,8 | 0,5 | 0,6 | 0,5 | IP 42 | 8 mm | M2,5 | 4337850 |
| 1087 Ri-HR | 25 | (1“) | 0,0001 … 0,01 | .00001″ … .0005″ | = | = | = | 0,65 – 1,15 | 2,4 | 0,5 | 0,7 | 0,5 | IP 42 | 8 mm | M2,5 | 4337851 |
Description
- 1a Dustproof protective cap across lifter
- 1b Protective cap
- 2 Data interface Duplex-Datenschnittstelle (for USB or Digimatic)
- 3 LEDs (red, green, yellow) for tolerance function
- 4 Rotatable control and display unit (-90° … +180°)
- 5 LCD display
- 6 Buttons for operation
- 7 Battery compartment
- 8 Clamping shaft
- 9a Measuring pin
- 9b Measuring pin with bellows
- 10 Measuring anvil
- 11 Cover across data interface
1086/1087 R(i) / R(i)-HR / ZRi
Inserting or changing the battery
Please use only “Renata” or “Varta” batteries.
The measuring instrument will turn on automatically after battery replacement.
Accessories
Holder for the digital dial indicator
A holder with a slot and 8 mm or 0.375“ mounting bore is recommended for holding the digital indicator (Fig. 7.1 a).
If a 0.375″ (9.52 mm) mounting hole is available and the dial indicator has a shaft diameter of 8 mm, the adapter socket 940 (order No. 4310103) must be used (Fig. 7.1 b).
The clamping screw must not apply pressure to the mounting shaft to ensure the free movement of the measuring pin.
Back panel with eyelets 1086 b (order no. 4337421)
- Release the four screws on the rear panel of the device.
- Remove the rear panel.
- Attach fastening eye.
Anvils with M 2.5 thread
If it cannot be released manually:
- Hold measuring pin with pliers. Use a piece of material to protect the surface of the measuring pin
- Remove the measuring anvil with a second pair of pliers.
Failure to observe this can damage the inside of the device or the measuring pin.
Operation
Key operation Function
Press briefly < 1 sec. upper row *
Press and hold > 1 sec. lower row
*Exception OI (ON/OFF >1 sec.)
Intuitive menu navigation
Clear key assignment with symbols 
Navigation:
< 1 sec. Next step- > 1 sec. Previous step
< 1 sec. Confirm entry, exit menu
Functions
Direct measuring and key function
| Details | Type 1086 R(i) / Ri-HR / WR(i) / ZRi | Type 1087 R(i) / Ri-HR / WRi / ZRi | ||||
| Functional Description | For details see: | Key label | ||||
| ON/OFF |  |
|
IO | |||
| 10.1 | “Enable / disable tolerance function” | 10.1 | 10.1 | |
|
TOL |
| 10.2 | Enable / disable dynamic measuring functions (max, min, max-min) | 10.2 | 10.2 | |
MAX/MIN | |
| Set preset value | |
|
PRESET | |||
| 10.3 | Send measuring value / freeze measuring value | 10.3 | 10.3 | |
|
DATA/HOLD |
| Set display to 0 | |
|
RESET | |||
| Set scale display, adjust measuring span and scale graduation value | |
>II< | ||||
| Settings menu | |
|
 |
|||
| Set scale display to 0 | |
IIIOIII | ||||
| Set PRESET(Selection of 3 PRESET values) | |
III | ||||
| Reference to absolute zero point of inductive measuring system |
|
|
ABS |
Measuring modes
RELATIVE measuring mode (Reset)
- Press the 0 ABS key briefly (< 1 sec.).
- Zero setting of the display at any position for step or comparative measurement.
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“ and ABS.
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, for example, is stored as the PRESET value.
- Calibration in the setting ring: Press the PR key briefly (< 1 sec.).
=> The display shows the designation of the active PRESET („PRI“, „PRII“ or „PRIII“)
Switching between PRI, PRII and PRIII
- Press and hold the PRESET III key (> 1 sec.):
- PREST The PRESET value switches between „PRI“, „PRII“ and „PRIII“.
=> „PR 1“, „PR 2“ or „PR 3“ is briefly shown on the display as confirmation.
EU/UK Declaration of Conformity
This measuring instrument complies with the applicable EU/UK directives..
A copy of the current Declaration of Conformity is available to download at www.mahr.com/products on the page for the relevant product and can be requested from the following address:
Mahr GmbH, Carl-Mahr-Straße 1, D-37073 Göttingen
Disposal information
Dear customer,
This device contains a non-rechargeable lithium battery. Batteries and rechargeable batteries (including damaged ones) must not be disposed of in household waste.
Used batteries and rechargeable batteries may contain contaminants that can be harmful to the environment and health. Please return the batteries/rechargeable batteries to your retailer or hand them in at your local recycling center. Return is free of charge and stipulated by law. Please only throw discharged batteries into the containers provided and cover the poles on lithium type batteries.
All batteries / rechargeable batteries are recycled. Valuable raw materials such as nickel, cobalt, lithium and manganese can thus be reused. Battery recycling is designed to protect the environment.
Old electronic equipment which 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, ElektroG) apply.
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.
Digital indicator
MarCator
1086R(i)/WR(i)/Ri-HR/ZRi
1087R(i)/WRi/Ri-HR/ZRi
Mahr GmbH
- Carl-Mahr-Straße 1
- D-37073 Göttingen
- Tel.: +49 551 7073 0
- info@mahr.com , www.mahr.com
FAQ
- Q: How long does the battery last in wireless operation mode?
A: The battery life will be reduced based on the frequency of wireless transmissions. For example, transmitting 4 values per minute will yield approximately 2,000 operating hours. - Q: What does the IP64 protection rating mean?
A: An IP64 rating indicates that the device is dustproof and protected against splashing water from any direction.
Documents / Resources
 |
Mahr DK-D1 Dial Indicator [pdf] Owner's Manual N33MCT8687RI, 1086 R i, 1087 R i, DK-D1 Dial Indicator, Dial Indicator, Indicator |