Selective Specifications:
Order No.
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Measuring Range
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Resolution
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Instrumental error*
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Flatness of measuring faces
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Parallelism of measuring faces
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Weight
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SPC data output
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293-140
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0-25mm
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0.001mm
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±1µm
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0.3µm or less
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1µm or less
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265g
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293-141
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25-50mm
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325g
|
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W/O SPC data output
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293-145
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0-25mm
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265g
|
||||
293-146
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25-50mm
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325g
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|||||
SPC data output
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293-180
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0-1"/0-25mm
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.00005"/ 0.001mm
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±.00005"/ ±1µm
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265g
|
||
293-181
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1-2"/25-50mm
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325g
|
|||||
W/O SPC data output
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293-185
|
0-1"/0-25mm
|
265g
|
||||
293-186
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1-2"/25-50mm
|
325g
|
Functions:
| Origin point setting (ABS length measurement system) | Pressing the ORIGIN button resets the ABS origin at the current spindle position. |
| Zero setting (INC length measurement system) | A brief press on the ZERO/ABS button sets display to zero at the current spindle position and switches to the incremental (INC) measuring mode. A longer press resets to the ABS measuring mode. |
| Hold | Pressing the HOLD button freezes the current value in the display. This fuction is useful for preserving a measuremtn in situations of poor visibility when the instrument must be moved away from the workpiece before the reading can be recorded. A second press unfreezes the display ready for another measurement. |
| Function lock | This function allows the ORIGIN (origin point setting) function and the ZERO (zero setting) function to be locked to prevent these points being reset accidentally. |
| Auto power ON/OFF | The reading on the lCD disappears after this instrument is idel for approx. 20 minutes, but the origin point is retained. Turning the spindle causes the reading on the LCD to reappear. |
| Data output | Models equipped with this function have an ouput port for transferring measurement data to a Statistical Process Control (SPC) sysytem. |
| Error alarm | In case of an overflow on the LCD or a computing error, an error message appears on the LCD, and the measuring function stops. This prevents an instrument from giving an erroneous reading. Also, when the battery voltage drops to a certain level the low-battery-voltage alarm annuciator appears well before the micrometer becomes unusable. |
Rapid Measurement
Faster measurement is achieved by using a coarser thread which feeds the spindle by 2mm per revolution of the thimble instead of the standard 0.5mm. This increase in thread lead has been made possible thanks to new high precision thread-cutting and test techniques. Trials show that a reduction in positioning times of 60% and measuring times of 35%* can be obtained, compared with a conventional micrometer.
*According to Mitutoyo's comparison test data for measuring time on typical workpieces.
Comparison of Measuring Time on a Stepped Workpiece
The time needed to measure 6 diameters on a workpiece, from the smallest to the largest with the micrometer held in one hand, was recorded for a conventional digital micrometer and for the QuantuMike.
Repeatable Measurement
The patented ratchet thimble mechanism helps ensure repeatable results by transmitting microvibrations along the spindle to the contact face to provide a constant measuring force and encourage good contact with the workpiece. The ratchet works from the thimble as well as the speeder so it is always easy to use - even when making measurements one-handed. The sound of the ratchet provides the user with a sense of confidence and the speeder enables the rapid spindle feed needed when measuring widely different dimensions.
Features:
Common Specifications:
| Functions | Origin point setting (ABS length measurement system) Zero setting (INC length measurement system) Hold Function lock Auto power ON/OFF Data output *1 Error alarm |
| Degree of protection | IP65 (IEC60529) *2 |
| Measuring force | 7-12N |
| Power supply | Button type silver oxide battery (SR44), 1 piece |
| Postion detection system | Electromagnetic rotary sensor *3 |
| Battery life | Approx. 3 years under normal conditions |
| Standard accessories | Reference bar, 1 piece (not for 0-25mm models) Button type silver oxide battery (SR44, No. 938882), 1 piece Spanner (No. 301336), 1 piece |
| *1: Applicable only to 293-140/293-141/293-180/293-181 *2: This product is not waterproof. Rustproofing shall be applied after use *3: Patent registered (in USA), Patent pending (in Japan, Europe, and China) |
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QuantuMike The QuantuMike brand of micrometer, inspired by this Mitutoyo Spirit, provides users with an excellent measuring experience with higher speed, quality and stability than ever before owing to the integration of sophisticated manufacturing and processing technologies. |
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