Bartington Grad601, Руководство по эксплуатации

Страница: 29 / 61

BARTINGTON INSTRUMENTS
Page 29 of 61 OM1800/26
The Threshold function selects the field gradient at which the frequency of the audio output
will increase. The audio tone increases from the alarm point to about ten times this value with
increasing gradient levels.
In Scan Mode, the screen is refreshed at a rate of 5Hz.
In Run Mode, the rate of data transfer can be changed in the ‘Set Parameters’ menu.
The mode is terminated using the ESC key.
17. Survey Mode (Grid Mode)
17.1. Survey Parameters
The data logger is programmed to record surveys based on a series of areas, termed Grids. Each
Grid will cover an area of 10x10, 20x20, 30x30 or 40x40m. Each Grid is numbered sequentially,
starting at Grid 1, and is surveyed using a pattern of traverses, starting at Traverse 1. In the
display ‘Traverse’ is abbreviated to ‘Trav’.
Note: Carefully record the relative position of each Grid, and the order in which Grids
are measured, and ensure that the starting direction is set in the parameters for future
reference.
Figure 10: Parallel traverse pattern.