Siemens Milltronics BW500, Руководство по эксплуатации

Страница: 101 / 220

Operation
8.5 Incline compensation
BW500 and BW500/L
Operating Instructions, 12/2016, A5E33482052-AD
99
Example:
Setting P398-02 = 30% will allow the 4 - 20 mA input to correspond to 0 - 30% moisture.
The Zero and Span calibration is not affected by the presence of a moisture meter. It is
understood that the calibrations are performed using dry static weights.
The Moisture Meter must be connected to the appropriate mA input and programmed as
described in the following steps:
1.
Enable mA input function for moisture compensation P255-01 or 02 = 4 (moisture
compensation).
2. Set appropriate mA input range P250-01 or 02 = 2 (default is 4 - 20 mA).
3. Set mA input moisture ratio P398-02 = 100% (default).
4. Observe moisture percentage using P398-01.
8.5 Incline compensation
Incline compensation is used to compensate for the varying vertical force component applied to
the belt scale due to varying inclination of the conveyor. The BW500 and BW500/L receives the
static load cell signal, and adjusts the load displayed and integrated, by a factor of COSINE of
the angle of incline.
The Inclinometer should be mounted to the conveyor stringer, parallel to the center of the belt
scale. The mA I/O card is required to accept the mA signal from the Inclinometer. This mA signal
must represent -30 to 30°. The incline angle is displayed in P399.
The dynamic load cell signal will vary with the incline of the conveyor. The BW500 and BW500/L
load display and integration values will remain constant for the given load on the belt scale
through the specified range of inclination.
The Zero and Span calibrations of the BW500 and BW500/L will be adjusted based on the angle
of incline of the conveyor. The Zero and Span calibration can be performed at any angle.
However, if incline compensation will be used, it must be enabled for all Zero and Span
calibrations
1)
.
1)
The BW500/L allows for a fixed inclined angle to be entered. See “P399 Incline Sensing
(Page 173)”.
The Inclinometer must be connected to the appropriate mA input and programmed as described
in the following steps:
1.
Enable mA input function for incline compensation P255-01 or 02 = 5 (Incline compensation).
2. Set appropriate mA input range P250-01 or 02 = 2 (default is 4 - 20 mA).
3. Observe incline angle using P399.