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Configuring Weighing Platforms
Entering Geographical Data for Use in Legal Metrology
Purpose
Entering geographical data allows the external adjustment of weighing equipment at a place
(e.g. at the manufacturer or vendor's place of business) that is not the same as the place of
installation. If the weighing equipment is adjusted at the place of installation, it is not
necessary to enter geographical data.
The sensitivity of weighing equipment changes depending on the place of installation as
it is dependent on the on-site gravitational force – or, more precisely, on gravitational
acceleration. Saving geographical data makes it possible to change the place of installation
of the weighing equipment after external adjustment has been carried out.
The adjustment of weighing equipment is valid at the place of installation and within a
specific tolerance zone. At 3000 e this zone extends ±100 km from the set geographical
latitude and ±200 m from the set elevation above sea level.
Installation Location in Germany
An exception to this is the setting for “Germany (Zone D):” If during external adjustment of
weighing equipment within Germany the geographical data
– Geographical latitude: 51.00 degrees
– 513 m elevation above sea level
are entered, the weighing equipment can be used throughout Germany. Gravitational
acceleration for “Germany (Zone D)” is 9.810 m/s
2
. On delivery the geographical data for
“Germany (Zone D)” are entered in the output device.
It is recommended to use the geographical data settings for “Germany (Zone D)” when
adjusting and delivering the weighing equipment within Germany.
Entering exact geographical data will lead to a higher level of accuracy but will also restrict
the tolerance zone.
Setup information
– It is only possible to enter geographical data when the menu access switch is open.
– When the Service mode is active, geographical data can be entered in the Setup menu under
“
WP 1" for the first weighing platform and “WP 2" for the second. Settings are made in
the “
Calibration/adjustment: Geographical data: Input
parameters" menu.
– You can enter either the “
latitude" (geographical latitude in degrees) and
“
altitude" (elevation in m above sea level) or the value for gravitational acceleration
“
gravity"
Gravitational acceleration takes precedence over the geographical latitude and elevation of
the location: If it has been entered, input fields for latitude and elevation show the values
“
99999.99" and “9999999" respectively. If only elevation and latitude have been
entered, “
0000000" is displayed for gravitational acceleration.
h
Then make sure that the geographical data for the adjustment location has been entered
correctly. If no external adjustment is carried out, enter the data for the installation location.
The data can be obtained from the relevant land registry or Ordnance Survey.
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