Endress+Hauser Proline Promag 50 - 6.2.3 Empty-Pipe;Full-Pipe Adjustment

PROline Promag 50 6 Commissioning
Endress+Hauser 81
6.2.3 Empty-pipe/full-pipe adjustment
Flow cannot be measured correctly unless the measuring tube is completely full.
This status can be permanently monitored using the Empty Pipe Detection:
• EPD = Empty Pipe Detection (with the help of an EPD electrode)
• OED = Open Electrode Detection (Empty Pipe Detection with the help of the measur-
ing electrodes, if the sensor is not equipped with an EPD electrode or the orientation
is not suitable for using EPD).
"
Caution!
A detailed description and other helpful hints for the empty-pipe/full-pipe adjustment
procedure can be found in the separate “Description of Device Functions” Manual:
• EPD/OED ADJUSTMENT → Carrying out the adjustment.
• EPD → Switching on and off EPD/OED.
• EPD RESPONSE TIME → Input of the response time for EPD/OED.
!
Note!
• The EPD function is not available unless the sensor is fitted with an EPD electrode.
• The devices are already calibrated at the factory with water (approx. 500 µS/cm).
If the fluid conductivity differs from this reference, empty-pipe/full-pipe adjustment has
to be performed again on site.
• The default setting for EPD/OED when the devices are delivered is OFF; the function
has to be activated if required.
• The EPD/OED process error can be output by means of the configurable status out-
put.
Performing empty-pipe and full-pipe adjustment (EPD/OED)
1. Select the appropriate function in the function matrix:
HOME → F → R → PROCESS PARAMETER → F → R →
EPD/OED ADJUSTMENT
2. Empty the piping. In case of an EPD adjustment, the wall of the measuring tube
should be wetted with fluid for the adjustment procedure but this is not the case with
an OED adjustment.
3. Start empty-pipe adjustment: Select “EMPTY PIPE ADJUST” or “OED EMPTY
ADJUST” and press F to confirm.
4. After empty-pipe adjustment, fill the piping with fluid.
5. Start full-pipe adjustment: Select “FULL PIPE ADJUST” or “OED FULL ADJUST”
and press F to confirm.
6. Having completed the adjustment, select the setting “OFF” and exit the function by
pressing F .
7. Now select the “EPD” function. Switch on Empty Pipe Detection by selecting the
following settings:
– EPD → Select ON STANDARD or ON SPECIAL and press F to confirm.
–OED → Select OED and confirm with F .
" Caution!
The adjustment coefficients must be valid before you can activate the EPD/OED
function. If adjustment is incorrect the following messages might appear on the
display:
– FULL = EMPTY
The adjustment values for empty pipe and full pipe are identical. In cases of this
nature you must repeat empty-pipe or full-pipe adjustment!
– ADJUSTMENT NOT OK
Adjustment is not possible because the fluid’s conductivity is out of range.