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GPT-3000 SERIES - FLT Geosystems

GPT-3000 SERIES - FLT Geosystems

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17 CHECK AND ADJUSTMENT17.3.7Adjustment of Vertical Angle 0 DatumIf when measuring the vertical angle of target A at telescope position normal (direct) and reversesettings, the amount of normal and reverse measurements combined is other than 360° (ZENITH-0),half of the difference from 360° is the error amount from corrected 0 setting. Carry out adjustment. Asadjustment for vertical angle 0 setting is the criteria for determining instrument coordinate origin, usespecial care for adjustment.Operating procedure Operation Display1 Level the instrument properly with theplate level.2 While pressing the [F1]key, turn power switch ON. [F1]+Power ONADJUSTMENT MODE 1/2F1:V ANGLE 0 POINTF2:INST. CONSTANTF3:V0 AXIS P↓3 Press the [F1] key. [F1]V0 ADJUSTMENT FRONTV: 90°00'00"ENTER4 Collimate target A from the telescope properly innormal setting.5 Press the [F4](ENTER) key.6 Collimate target A in reverse telescope setting.7 Press the [F4](ENTER) key.Measured value is set and carry out normal anglemeasurement.Collimate A(Normal)[F4]Collimate A(Reverse)[F4]V0 ADJUSTMENT REVERSEV: 270°00'00"ENTER8 Check that the total amount of normal and reverseangular travel is 360° collimating the target A bynormal and reverse positions.V : 270°00'00"HR: 120°30'40"0SET HOLD HSET P1↓17-13

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