Gravity Acceleration And Correction Of The Weighing Error; Indication Of The Gravity Acceleration Value; Correction Of The Weighing Error Introduced By A Different G Value Between The Calibration And Utilisation Zone (Compulsory For Legal Type Instruments); Serial Outputs - Vetek DGT Technical Manual

5. GRAVITY ACCELERATION AND CORRECTION OF THE WEIGHING ERROR.

5.1 INDICATION OF THE GRAVITY ACCELERATION VALUE

(Compulsory for the legal type instruments)
This instrument conforms to the laws currently in force regarding non-automatic weighing instruments. Such g-
sensitive instruments are influenced by the gravitational acceleration value "g" of the utilisation zone hence it is
compulsory to indicate, with a label or on the display, the coded name of the utilisation zone where the weighing
machine can be used.
When turned on, the approved instrument display, after the name and the installed software version, the gravity
acceleration value of the zone of use for a few seconds. Specifically:
Approved instrument:
Instrument start-up → ... → "LEGAL" → "g value "
5.2 CORRECTION OF THE WEIGHING ERROR introduced by a different g value between the
calibration and utilisation zone (compulsory for legal type instruments).
Such g-sensitive instruments are influenced by the gravitational acceleration value "g" of the utilisation zone so a
special programme has been created to compensate for any differences in the gravitational attraction between the
place where the weighing machine is calibrated and the place of utilisation, eliminating in this way the error entered
on the weight.
Approved instrument:
In the SET-UP ENVIRONMENT, in the SEtuP >> ConFiG >> GrAV step it is possible to only have displayed the
gravitation acceleration value of the destination zone of use.
Non approved instrument:
In the SET-UP ENVIRONMENT, in the SEtuP >> ConFiG >> GrAV, it is possible to view and/or enter the gravitation
acceleration value of the destination zone of use.

6. SERIAL OUTPUTS

The instrument has two bidirectional serial outputs, which have the output in ASCII code compatible with the majority
of printers, remote displays, PCs and other devices.
The transmission of data through the serial ports can be configured in different ways, according to the setting of the
"PC SEL", "PCMode" and "Pr.ModE" steps in the SET-UP environment.
Refer to the paragraph 6.4 section for the functioning specifics.
6.1 RS485 (DGT4 / DGT60 / DGT4 AN) or COM1 (DGTQ / DGTQ AN/ DGTP / DGTP AN)
SERIAL PORT
It is bi-directional (half duplex) and uses an R485 for transmitting data for the DGT and DGT60, or one may use
either an RS485 or an RS232 for the DGTP and DGTQ (depending on how the jumpers of the COM1 of the board
have been set; the jumpers are set by default in RS485 for further details see section 11 – "CONNECTION
SCHEMES").
It is mainly used to connect computers, PLCs, additional remote displays.
The transmission speed may be selected in the SET UP among these: 1200, 2400, 4800, 9600, 19200, 38400,
57600, 115200 Baud (bit/sec.).
Below is the RS485 connection of the indicator:
DGT/DGT60 DGTQ and DGTP
-------------------------------------------------------------------------------
- B(-)
+ A(+)
Meaning
Line 485 -
Line 485 +
31
DGT / DGT60 / DGTQ / DGTP