Siemens HydroRanger 200 HMI Operating Instructions Manual page 133

2.1.3. Sensor Mode
Sets the type of measurement required for the application.
Index
Options
(Mode)
Alters
Dual-Point Difference (DPD) and Dual-Point Average (DPA)
Single-point model use
For DPD or DPA, the unit requires either two transducers of the same type, or
one transducer and one mA input. If two transducers are used, all transducer
parameters become indexed, and a third level point is calculated.
•
•
For these operations any of three level points (Transducer 1, Transducer 2, or
the calculated point) can be used to trigger relays (
146).
The points must be globally set to either Dual-Point Difference or Dual-Point
Average, as required. Point 3 becomes the calculated value as shown above.
Setting a rake control
See
Dual-point model use
To set a dual-point HydroRanger for DPD or DPA functions, Point 3 must be set
to either Dual-Point Difference or Dual-Point Average , as required. Points 1
and 2 cannot be set to Dual-Point Difference or Dual-Point Average, but these
points are used to calculate the value in Point 3.
This table shows the available functions:
Operation
2. 1 .3. Sensor Mode
2.1.4. Transducer Selector
Sets the transducer index for all parameters applicable to this sub-menu. All
parameter values will then apply to the selected index.
A5E36281317
Single-point model
Global
Out of service
*Level
Space
*Distance
Dual-Point Difference
Dual-Point Average
Flow rate in open channel
Pump Totalizer
2. 1 3.2. Primary Measuring Device
DPD (difference) = Point 1 - Point 2
DPA (average) = (Point 1 + Point 2)/2. The calculated DPD or DPA is
always based on level measurements of Points 1 and 2.
on page 91 for more information.
Index Available options
1
2
3
HydroRanger 200 HMI – OPERATING INSTRUCTIONS
Dual-point model
Transducer
(how full the vessel is; default for
dual-point model)
(how empty the vessel is)
(distance from transducer to material;
default for single-point model)
(DPD)
(DPA)
(OCM)
(total pumped volume)
2.8.1.2. Level Source
*Level, Space, *Distance, Flow rate in open channel,
Pump Totalizer
*Level, Space, *Distance, Flow rate in open channel,
Pump Totalizer
Dual-Point Difference, Dual-Point Average
on page
Page 123