Fill Electrolyte System And De-Aerate Sensor; Adjust Variables Of The Transmitter - Burkert 8201 Manuel Utilisateur

4.3 Fill electrolyte system and de-aerate sensor

See also Figs 2, 6, 7, 8 and "Information on changing electrolyte bottle".
• Have a new, full electrolyte bottle ready.
• If the electrolyte vessel is pressurised, you must reduce the pressure; block the
pressure infeed and release pressure in the electrolyte vessel by briefly loosening the union
nut for the plastic insert.
• Loosen the electrolyte vessel tension clamp and remove the upper part.
•
Remove the empty electrolyte bottle – if applicable (see Fig 8).
•
Remove the red cap from the new electrolyte bottle and disinfect the rubber plug with 70 % by
volume ethanol if required.
•
Insert the full electrolyte bottle (see Fig 7).
•
Replace the upper part of the electrolyte vessel.
•
Close the electrolyte vessel again using the tension clamp.
•
Pressurise the electrolyte vessel with at least 3 bar.
•
Open the de-aeration screw on the sensor head (see Fig 2) by about 1 rotation and wait until
the electrolyte flows free of bubbles.
• Close the sensor de-aeration screw.
• With water, carefully clean parts wetted by electrolyte.
• Load the electrolyte vessel with compressed air and set the required operating pressure for
the electrolyte vessel: 0.5 bar above the highest occurring pressure (medium or
steam pressure); max. 7 bar.
Only Bürkert electrolyte may be used in order to guarantee the faultless function of the probes for
a long period of time and without damaging the ground diaphragm.
4.4 Adjust variables in the measuring transmitter
Various variables and options must be set in the measuring transmitter control menu to ensure
correct signal processing. You will find the required variables in the test protocol supplied with every
sensor.
When entering information into the control menu, pay attention to the respective information in the
operating instructions for the measuring transmitter.
Table 3: Examples of variables and options to be entered
Parameter
Slope
Zero point
Isotherm point [pHis; Uis]
Factor to be displayed
Temperature compensation
Temperature sensor
Current output
The measuring transmitter has been adjusted to the sensor being used on entering these variables.
The measuring system is theoretically ready for operation once entry is completed. On first commis-
sioning and after longer breaks from operation, sensor calibration is recommended.
16- 8201
Value to be set
Enter variable from test protocol
Enter variable from test protocol
Enter variable from test protocol
–
–
–
0 to 20 mA or 4 to 20 mA
Option to be selected
–
–
–
pH
automatic
Pt1000
pH or mV