Operating Instructions
29
7. Start-up procedure
7.1 Basic start-up
Upon delivery, the sensor is not calibrated to the product to be measured and must be parameterised when
started up. During the process, the mass flows measured by the sensor are assigned the display values and
output quantities required by the user.
The following points must first be checked:
•
Check sensor is flush with the internal surface of the pipeline.
•
The correct connection between the sensor and the transmitter.
•
A warm-up time of approx. 5 minutes before starting calibration and after switching on the sensor's
power supply.
The expected flow rate must first be determined for the measurement point, and the required measuring
range and physical units must be entered in
menu 1 (Measurement).
The system is then calibrated on at least two operating points (one empty measurement and one operating
point) in
menu 2 (Calibration)
:
Min point
While there is no mass flow, the 1st point is set to 0 and the
calibration for the zero point is performed.
Max point
During normal conveyance, the 2nd point is set to a known flow rate and
calibration is also performed.
The value can be corrected afterwards during weighing.
The device has thus performed its basic function and the measurements are displayed.
Additional support points If non-linearities occur when measuring with different flow rates, up to 5 support
points can be selected in
menu 2 (Calibration).
These support points can then
be calibrated with different flow rates.
7.2 Adjusting the measurement values
The system's additional functions can be set in the following menus:
Alarms
Values for flow rate lower or upper limits can be set in
menu 3 (Alarm)
.
A sensor monitoring alarm can also be activated here.
Analogue output
The analogue output values are assigned in
menu 4 (Analogue output)
.
The required measuring range is assigned a corresponding output value here
(4. . . 20 mA). Upper and lower limits of the permitted power and power in the
event of failure are set here. Power output can also be calibrated here.
Pulse output
An internal totaliser function integrates the mass flow over time.
In
menu 5 (Pulse output),
the pulse output can be configured, so that the
system emits pulses corresponding to a defined conveyed mass.
Digital input
In
menu 6 (Digital input),
the system's digital inputs can be assigned various
functions and their working direction.
System
In
menu 7 (System),
functions such as selection of the menu language, the
number of connected sensors and their average, the display screen or ModBus
addressing and speed are summarised.
Totaliser
The entire flow volume since the last totaliser reset can be read with the totaliser
function. A reset can be performed via an external control cable (see
menu 6
(Digital input)
) or directly via the Display by pressing the R symbol (see
menu 7
(System)
).