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Length measuring complex ElMetro-LISA
Length measuring complex ElMetro-LISA is intended for automatic precise measurement of length intervals in measuring reels in accordance to GOST 7502, leveling rods in accordance to GOST 10528, measuring scales in accordance to GOST 427, geodetic tapes and graduated poles in accordance to GOST 8.247 as well as other length measuring tools.
The complex corresponds to working standard of the 3rd class of the 2nd part in accordance to GOST R 8.763.
Device description and working principle of ElMetro-LISA:
Metrology length measuring complex ElMetro-LISA includes (view Pic.1) operator working desk (1) with a personal computer (2), test desk (comparator unit) (7) mounted on equally-spaced supports (11) with adjustable base (9), a travelling carriage (6) with emergency stop button (5), reel bridling equipment (8), reel travelling equipment (4), digital thermometers equally-spaced along the whole length of test desk (10) and spooler (3) which is supplied at order.
There are high-precision guide rails (9) intended for travelling carriage motion by means of guide units (7) that provide accuracy and smoothness of movement.
Metrology stand is equipped with a spooler (supplied at order) for those measuring reels whose length exceeds length of the desk, it includes a spool (11) fixed on a mounting bracket (10), a reel restraining device (4) and a changeover unit (2). Rewinding spool could hold up to 100 meters of measuring reel.
In order to provide required bridling of measuring reel metrology stand ElMetro-LISA is equipped with bridling equipment (view Pic. 3) which consists of a clamp (8), mounting (9), reel anchoring device (2) and a changeover unit (7).
ElMetro-LISA stand is based on a system which consists of a precise incremental length converter and hardware/software interface. Incremental converter is a magnetic non-contact measuring linear-displacement transducer (NCLDT) which includes a precise magnetic tape attached along the entire length of a test desk with ferromagnetic strokes applied on it with high accuracy and a data head which scans mentioned strokes and is rigidly mounted on a movable carriage.
Output signal of NCLDT controls movement of a motor-driven carriage with a monitoring and display device installed on it (no.5 in Pic. 2). Present device is represented by a rigidly connected assembly of two coordinate tables (no.6 in Pic. 2) and a digital camera with 10x zoom. The camera broadcasts enlarged image of part of the scale, strokes and controlled intervals of verified measuring instrument. An image with the scale of the measuring instrument is shaped in personal computer screen.
Technical characteristics:
- ElMetro-LISA is designed to operate under ambient temperatures from +10 to +35 ºС.
Order code of measuring complex ElMetro-LISA includes:
- Product name (ElMetro-LISA);
- Length of test desk (4 or 5 meters);
- Availability of a spooler (P – if provided or 0 – without the device).
- Weight and overall dimensions of ElMetro-LISA stand in dependence on its model are listed in Table 1 below.
Model Weight, kg Overall dimensions, mm Table 1. Weight and overall dimensions of ElMetro-LISA complex ElMetro-LISA-5-P 180 6000х600х1400 ElMetro-LISA-5-0 170 5850х600х1400 ElMetro-LISA-4-P 160 5000х600х1400 ElMetro-LISA-4-0 150 4850х600х1400 - Electric supply of the stand is provided by a single-phase network of 220 V AC with 50 Hz frequency. Power consumption of the stand is not more than 750 V·A.
- Operating drawing power for verified reels (or tapes) is not less than (10±1) N.
- Movement of a verified reel (a tape) on the test desk surface is not less than 100 mm.
- The stand provides length measurement with 1 μm step.
- Absolute error of length measurement ∆L is not more than ±(8+8L) μm.
- Absolute error of measuring millimeter and centimeter intervals ∆Lmax is not more than 50 μm.
- Minimum positioning resolution of a travelling carriage is not more than (10±2) μm.
- Electrical resistance of electric circuits isolation between joint outputs and grounding clamp must be not less than 20 MOhm under ambient temperature (23±5)°С, relative humidity below 75 % and 500 V test voltage.
- Mean time between failures is 5000 h.
- Mean time for recovery is 6 h.
- Average life-time is 10 years.
- Verification interval: 2 years.
- Metrology stand ElMetro-LISA provides:
- precise measurement of measuring reels length in accordance to GOST 7502 and graduated poles in accordance to GOST 8.247;
- precise measurement of length intervals of leveling rods in accordance to GOST 10528, measuring scales in accordance to GOST 427 and geodetic tapes in accordance to GCINR 17-195;
- automatic control of movable carriage during length intervals measurement;
- adjustment of digital camera of monitoring device along the vertical and horizontal axis in order to focus it;
- backlight of monitoring device operating area;
- emergency stop of movable carriage;
- indication of network voltage;
- measurement data output into a PC screen.
Length measuring stand ElMetro-LISA is supplied with software which provides:
- communication between the stand and PC via RS-232 interface;
- visualization of measurement scales received from digital video cameras;
- control of the movable carriage motor;
- automatic collection of measurement results;
- archiving of measurement results;
- record of measurement results data and information about verified measuring instruments with reference to their serial numbers.
- Measuring instruments included in the stand supply package:
1. Goniometer with vernier, type I in accordance to GOST 5378 with following characteristics:
- external angles measurement range is from 0 to 180°;
- limit of permissible main absolute error is ±2′;
- least significant digit value 1°.
2. Digital thermometer with following characteristics:
- limit of permissible main absolute error is not more than 0.1°С;
- least significant digit value of the display is 0.01°С.
Supply package:
Standard supply package of length measuring complex ElMetro-LISA includes: test desk (1 pc.) personal computer (1 pc.), manual instruction (1 pc.), products certificate (1 pc.), verification procedure description (1 pc.), USB-flash card with ElMetro-LISA software (1 pc.), a device for installation of a measuring laser system (1 pc.), goniometer with vernier (1 pc.), laboratory thermometer (3 pcs.), tool kit (1 set).
In order to get a commercial offer on length measuring complex ElMetro-LISA of the Russian manufacturer ElMetro company, please send order code of the stand (view above) to info@elmetro.ru or contact us by tel.: +7 (351) 220-06-01. To discuss technical questions, please, contact us by tel.: +7 (351) 741-85-42 (43).