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• Reflector sheet, Target and Prism do not face the instrument. • Reflector sheet, Target and Prism are not correctly sighted. • Measurement range is over in Reflectorless mode. • Sufficient signal does not return by sighting sharp edge etc. at Reflectorless mode. Change the object that has much better reflectivity, or use a reflecting sheet, or wait until the sun activity has weakened. Li-batt.voltage is low. • The Date Clock is powered by Have the lithium battery the built-in lithium battery. replaced by the dealer from • The lithium battery needs to be whom the instrument was replaced in five years. purchased. Error Message Meaning What to do ERROR!! EDM ERROR 04 -05, 34-39, 50-53 ERROR!! ETH ERROR 70-76 Distance measurement system problem Angle measurement system problem Turn the power off, and then turn on again. Repair is needed when the message appears consistently. ERROR!! MEMORY ERROR 19 Memory problem ERROR PS DATA of EDM ERROR P DATA of EDM Problem of the internal EDM parameters ERROR ETH DATA Problem of the internal ETH parameters 13.2 Atmospheric Correction The speed at which light travels through the air varies depending on the temperature and atmospheric pressure. The R-300X series is designed to measure distances at the speed of light in order to measure accurately, atmospheric correction needs to be used. The instrument is designed to correct for weather conditions automatically if the temperature and pressure are input. Correction is then carried out based on the following formula. Calculation formula: K= (276.26713 -78.565271 • P ) x10-6 273.14941 + t K: Atmospheric Correction Constant P: Atmospheric pressure (hPa) t: Temperature(°C) Distance after Atmospheric Correction D = Ds (1+K) Ds: Measured distance when no Atmospheric Correction is used. 13.3 hPa and mmHg conversion table [Converting from hPa to mmHg] hPa 0 10 20 30 40 50 60 70 80 90 mmHg mmHg mmHg mmHg mmHg mmHg mmHg mmHg mmHg mmHg 500 375 383 390 398 405 413 420 428 435 443 600 450 458 465 473 480 488 495 503 510 518 700 525 533 540 548 555 563 570 578 585 593 800 600 608 615 623 630 638 645 653 660 668 900 675 683 690 698 705 713 720 728 735 743 1000 750 758 765 773 780 788 795 803 810 818 1100 825 833 840 848 855 863 870 878 885 893 1200 900 908 915 923 930 938 945 953 960 968 [Converting from mmHg to hPa] mmHg 0 10 20 30 40 50 60 70 80 90 hPa hPa hPa hPa hPa hPa hPa hPa hPa hPa 400 533 547 560 573 587 600 613 627 640 653 500 667 680 693 707 720 733 747 760 773 787 600 800 813 827 840 853 867 880 893 907 920 700 933 947 960 973 987 1000 1013 1027 1040 1053 800 1067 1080 1093 1107 1120 1133 1147 1160 1173 1187 900 1200 1213 1227 1240 1253 1267 1280 1293 1307 1320 13.4 Error when no atmospheric correction is made When measurement is carried out with no atmospheric correction (with the settings fixed at a temperature of 15°C and an atmospheric pressure of 1013hPa or 760mmHg), the error per 100 meters in temperature and pressure will be shown in the tables below. • When the actual pressure is 1013hPa (760mmHg) and the temperature is 25°C, conducting the measurement with the temperature left at 15°C will result in the measurement being short by 0.9mm per 100 meters. [Error table: When hPa (15°C, 1013hPa as standard)] Unit: mm C° hPa 1200 1100 1013 900 800 700 600 500 45 2.0 -0.5 -2.6 -5.5 -8.0 -10.5 -13.0 -15.5 35 3.0 0.4 -1.8 -4.7 -7.3 -9.9 -12.5 -15.1 25 4.0 1.4 -0.9 -4.0 -6.6 -9.3 -12.0 -14.6 15 5.2 2.4 -0.0 -3.1 -5.9 -8.6 -11.4 -14.2 5 6.3 3.5 1.0 -2.2 -5.1 -8.0 -10.8 -13.7 -5 7.6 4.7 2.1 -1.3 -4.2 -7.2 -10.2 -13.1 -15 9.0 5.9 3.2 -0.2 -3.3 -6.4 -9.5 -12.6 S: Slope distance .: Vertical angle from horizontal K: Atmospheric refraction coefficient (0.14 or 0.2) Re: Diameter of earth (6,370 km) 13.6 Distance range Generally speaking, the maximum range which can be measured varies considerably depending on the atmospheric conditions. For this reason, the specifications illustrate the values for both good and normal weather conditions. It is extremely difficult to judge when weather conditions are “Good” and when they are “Normal”. With this instrument, the conditions noted below are used to differentiate between the two situations, (good weather conditions for surveying are different from normal weather conditions, and in surveying situations, cloudy skies are considered more favorable than sunny skies.) Weather conditions for measurement ranges are based on the following standard values: Normal: Visibility of approximately 20 km, with slight shimmer and moderate wind. Good: Visibility of approximately 40 km, overcast, with no shimmer and moderate wind. 14. NOTICE TO THE USER OF THIS PRODUCT To assure compliance with the Safety standard 21 CFR, Chapter 1. Subchapter J. The U.S. bureau of Radiological Health requires the following information to be provided to user: It can be dangerous to look into the beam with optical equipment such as binoculars and telescopes. 1) Specifications of laser radiation A) The EDM module of the R-300X pr...

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