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GPT-3000 SERIES - FLT Geosystems

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7 DATA COLLECTION7.3.4 Column Offset MeasurementIf it is possible to measure circumscription point (P1) of column directly, the distance to the center of thecolumn (P0), coordinate and direction angle can be calculated by measured circumscription points (P2)and (P3).The direction angle of the center of the column is 1/2 of total direction angle of circumscription points(P2) and (P3).P2PPP3Example: Non-prism measurementOperating procedure Operation Display1 Press the [F3](MEAS) key and press the [F4]key toget to the next soft key page.[F3][F4]2 Press the [F1](OFSET) key. [F1]3 Press the [F4](P1↓) key. [F4]PT# →PT-11NPCODE :TOPCON PR.HT : 1.200 mINPUT SRCH MEAS ALLPT# →PT-11PCODE :TOPCON NPR.HT : 1.200 mVH *SD NEZ P1↓OFSET PTL NP/P P2↓OFFSET 1/2F1:ANG. OFFSET NPF2:DIST. OFFSETF3:PLANE OFFSET P↓OFFSET 2/2F1:COLUMN OFFSET N PP↓4 Press the [F1](COLUMN OFFSET) key. [F1]COLUMN OFFSETCenterNPHD:mMEAS --- NP/P ---5 Collimate the center of the column (P1) and pressthe [F1](MEAS) key.Measuring will start.After the measurement, angle measuring displayof the left side (P2) will be shown.CollimateP1[F1]COLUMN OFFSETCenterHD* [n] Measuring...NP7-16

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