Geometrics Memory-Mag G-856AX, Руководство по эксплуатации

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Geometrics, Inc
.
G-856AX Operation Manual
18
Then press
: ‘day’, ‘day’, ‘day’,
and then press
‘hour’ , ‘hour’ , ‘minute’, ‘minute’, ENTER .
The Julian date is the number of days since the beginning of the year. For example, the
Julian date for February 10 is 41. To enter the date and time corresponding to 10:35AM
on February 10 you would key
AUTO , TIME , SHIFT , ‘0’,’4’,’1’,’1’,’0’,’3’,’5’, ENTER.
There are a number of features related to the internal clock, and they are discussed at
several places in this manual. It is especially important to set the clock properly when
diurnal corrections will be applied to your survey measurements because the survey and
the base station magnetometer clocks must be synchronized with each other for the
correction to be effective. The console’s date and time setting will be used in post-
acquisition processing with the MagMap2000 software. The recommended procedure for
insuring correct internal clock synchronization is as follows:
 Check the clock to see if it needs setting. Do this by pressing TIME .
The hour,
minutes, seconds will light in the FIELD/TIME display and you should see that
the seconds are advancing. The Julian date will be indicated in the
STATION/DAY display. Compare the magnetometer clock’s time to your watch,
time standard, or your base station instrument and decide whether you need to
reset the clock. Note that the display will automatically go blank 5 seconds after
pressing
TIME .

If you decide that you need to reset the clock, choose a time in the near future
when you plan to start the G-856AX clock. Then proceed with the clock setting
sequence
( AUTO, TIME, SHIFT
,
’d
ay’, + ‘day’ + ‘day’ +’
hour’ + ‘hour’ + ‘min.’ +
‘min.’). Now, wait for real time to match your clock setting. At the instant the
display matches the real time standard press
ENTER . When you do this, the new
setting will be entered and the display will go blank
.
Note that G-856AX clock time does not change until you press
ENTER
. If you make a
mistake in the time entry sequence, just press CLEAR and you will see that the old time
setting is still active
.
Pressing
ENTER
just after the Julian Date is keyed in will change this number without
resetting the clock. In Automatic Mode the magnetometer will increment this number
every 24 hours as described below under Item 9 - Automatic reading set-up
.
3 - Setting the Line Number Marker
If the magnetometer is not in Automatic Mode (collecting measurements as a base-station
instrument) then it is in Survey Mode. In Survey Mode you are provided with a means of
designating the current survey line with a line number that will be stored in console
memory. Each measurement that you acquire in Survey Mode will be designated by its
line and station number. (See Magnetic Surveying, in the Field Operation chapter for
further details). When in Survey Mode, a three-digit number indicating the line number
appears in the
STATION/DAY
display when the
TIME
key is depressed. When in