Geokon 6101, Инструкция по эксплуатации, Страница: 9 / 14

4
5. Data Recording and Reduction _________________________________
The data should be recorded on field sheets that have columns for the readings as in Figure 3. Position the
tiltmeter such that the + is over peg 1. Record this number in the column labeled Peg 1. Rotate the unit 180

placing the plus (+) end over Peg 3. Record this data in the column headed Peg 3.
Repeat the above for column pegs 2 and 4, always locating the plus (+) end of the sensor over the respective peg.
Note: It is advisable to take the pairs of readings, one immediately after the other, to avoid the effects of
temperature drift, etc.
When recording the Readout Box output it is not necessary to record the actual numbers; ignore the decimal point,
only the significant digits need to be recorded; i.e., + .0123 would be + 123.
The difference column is the algebraic difference between the readings, i.e., (Peg 1) – (Peg 3).
Example: of readings from a vertical tiltplate
Peg 1 reading = 82 and Peg 3 reading = –99
DIFF = (82) – (–99) = +181
The conversion of this difference to degrees of angle is done as follows:
Reading with either the Geokon GK601 or GK 603 readouts

degrees = sine
–1
x 10
–4
DIFF
4
The tilt can be expressed also as a tilt in mm/meter or inches per foot as follows.
Tilt = 0.0003 x DIFF inches per foot, or
Tilt = 0.025 x DIFF mm/meter
The change column is determined by subtracting the initial DIFF from the current DIFF algebraically.
Example of readings taken from a horizontal tiltplate
Four readings are taken; two each for Pin 1 and 3 and two each from Pins 2 and 4, following the instructions
of Section 4.
Reading Peg 1 to 3 +0.0025
Reading Peg 3 to 1 –0.0078
Reading Peg 2 to 4 –0.0063
Reading Pin 4 to 2 +0.0011
Peg 1 and 3. Tilt in this direction is given by the difference +25 – (–78) = +103