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Meaning of Symbols ABSOLUTE Linear Encoder Mitutoyo s technology has realised the absolute position method absolute method With this method you do not have to reset the system to zero after turning it off and then turning it on The position information recorded on the scale is read every time The following three types of absolute encoders are available electrostatic capacitance model electromagnetic induction model and model combining the electrostatic capacitance and optical methods These encoders are widely used in a variety of measuring instruments as the length measuring system that can generate highly reliable measurement data Advantages 1 No count error occurs even if you move the slider or spindle extremely rapidly 2 You do not have to reset the system to zero when turning on the system after turning it off *1 3 As this type of encoder can drive with less power than the incremental encoder the battery life is prolonged to about 3 5 years continuous operation of 18 000 hours *2 under normal use *1 Unless the battery is removed *2 In the case of the ABSOLUTE AOS Digimatic caliper electromagnetic encoder model Measuring Instruments Shipped with Inspection Certificate Mitutoyo guarantees product quality as a leading precision measuring instrument manufacturer and ships measuring instruments with an inspection certificate that includes inspection data so that customers can use them with confidence Mitutoyo also calibrates the purchased measuring instrument and issues for a fee a calibration certificate that proves traceability to the relevant standard * For the meaning of the inspection marks shown at left refer to the detailed description of each product IP Codes These are codes that indicate the degree of protection provided by an enclosure for the electrical function of a product against the ingress of foreign bodies dust and water as defined in IEC standards IEC 60529 2001 and JIS C 0920 2003 [IEC International Electrotechnical Commission] * For details of the test conditions used in evaluating each degree of protection please refer to the original standard First characteristic numeral Degrees of protection against solid foreign objects Brief description Definition 0 Unprotected — 1 Protected against solid foreign objects of Sø50 mm and greater A Sø50 mm object probe shall not fully penetrate enclosure* 2 Protected against solid foreign objects of Sø12 5 mm and greater A Sø12 5 mm object probe shall not fully penetrate enclosure* 3 Protected against solid foreign objects of Sø2 5 mm and greater A Sø2 5 mm object probe shall not fully penetrate enclosure* 4 Protected against solid foreign objects of Sø1 0 mm and greater A Sø1 0 mm object probe shall not fully penetrate enclosure* 5 Protected against dust Ingress of dust is not totally prevented but dust that does penetrate must not interfere with satisfactory operation of the apparatus or impair safety 6 Dustproof No ingress of dust allowed 7 — 8 — Second characteristic numeral Degrees of protection against water Brief description Definition 0 Unprotected — 1 Protected against vertical water drops Vertically falling water drops shall have no harmful effects 2 Protected against vertical water drops within a tilt angle of 15 degrees Vertically falling water drops shall have no harmful effects when the enclosure is tilted at any angle up to 15° on either side of the vertical 3 Protected against spraying water Water sprayed at an angle up to 60° either side of the vertical shall have no harmful effects 4 Protected against splashing water Water splashed against the enclosure from any direction shall have no harmful effects 5 Protected against water jets Water projected in jets against the enclosure from any direction shall have no harmful effects 6 Protected against powerful water jets Water projected in powerful jets against the enclosure from any direction shall have no harmful effects 7 Protection against water penetration Ingress of water in quantities causing harmful effects shall not be possible when the enclosure is temporarily immersed in water under standardised conditions of pressure and time 8 Protected against the effects of continuous immersion in water Ingress of water in quantities causing harmful effects shall not be possible when the enclosure is continuously immersed in water under conditions which shall be agreed between manufacturer and user but which are more severe than for IPX7 Main Unit Startup System Installation of Main Unit Startup System As a part of the enhancement of our export control system the CNC measuring machines all the CNC Coordinate Measuring Machines Vision Measuring Systems and Form Measuring Machines are equipped with a Main Unit Startup System relocation detecting system This system is designed to take a machine out of operation upon detecting the mechanical shock that accompanies relocation If you intend to relocate a measuring machine fitted with this system please contact us beforehand so that our service engineers can assist you On the other hand the system may be triggered in the event of a natural event such as a powerful earthquake In this case our service engineers will deal with the situation at the earliest opportunity 10