7000 SERIES INDICATORS
EN 131
APPENDIX D GEO CODES
The GEO code feature provided in the T72XW indicator permits calibration readjustment due to changes in
elevation or latitude without reapplying test weights.
This adjustment assumes a previously accurate calibration was done with the GEO code set properly for that
original location and that the GEO code for the new location can be accurately determined.
The procedure for using this feature is as follows.
Original Site Calibration
1. Use the GEO code chart (Table D-1) on the following pages to determine the GEO code for the current altitude
and location at which the scale will be calibrated.
2. Enter that GEO value into the GEO code parameter in setup at Scale > Calibration.
3. Immediately after entering the GEO code, perform a zero and span adjustment using accurate test weights.
4. Exit the setup menu tree.
The scale can now be used in its new location.
New Site GEO Code Adjustment
When a indicator is to be reinstalled at a different geographic location, gravitational and altitude changes can be
accounted for by following these steps. Note that this procedure is not necessary if an on-site recalibration is
performed.
1. Use the GEO code chart (Table D-1) on the following pages to determine the GEO code for the new altitude
and location at which the scale will be used.
2. Enter that GEO value into the GEO code parameter in Setup at Scale > Calibration.
3. Immediately after entering the GEO code, exit the setup menu tree. DO NOT perform a normal calibration.
4. The calibration has now been adjusted for the differences in gravity from the original site of calibration to the
new site of use.
Using the GEO code value for calibration adjustment is not as accurate as re-applying certified test weights
and re-calibrating the scale in a new location.
Table D-1: GEO Adjustment Values
Latitude North
or South,
in Degrees and
Minutes
Height Above Sea Level, in Meters
0
325
650
975
1300
1625
1950
2275
2600
2925
3250
325
650
975
1300
1625
1950
2275
2600
2925
3250
3575
Height Above Sea Level, in Feet
0
1060
2130
3200 4260
5330
6400
7460
8530
9600
10660
1060
2130
3200
4260 5330
6400
7460
8530
9600
10660
11730
0° 0'
–5° 46'
5
4
4
3
3
2
2
1
1
0
0
5° 46'
–9° 52'
5
5
4
4
3
3
2
2
1
1
0
9° 52'
–12° 44'
6
5
5
4
4
3
3
2
2
1
1
12° 44'
–15° 6'
6
6
5
5
4
4
3
3
2
2
1
15° 6'
–17° 0'
7
6
6
5
5
4
4
3
3
2
2
17° 10'
–19° 2'
7
7
6
6
5
5
4
4
3
3
2
19° 2'
–20° 45'
8
7
7
6
6
5
5
4
4
3
3
20° 45'
–22° 22' 8
8
7
7
6
6
5
5
4
4
3
22° 22'
–23° 54' 9
8
8
7
7
6
6
5
5
4
4
23° 54'
–25° 21' 9
9
8
8
7
7
6
6
5
5
4
25° 21'
–26° 45' 10
9
9
8
8
7
7
6
6
5
5
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