4.3 Installing sensor in the bypass fitting
Minimum flow (l/h)
Do not drop below the minimum flow (l/h, see Technical Data):
–
Monitor the flow at the connected controller. If the measured value of the flow is used
for control, switch off the control if the minimum flow rate is undershot or switch to the
basic load.
–
Only install the sensor in bypass fittings of type DLG III A, DLG III B or DGM (25 mm
module). Use appropriate measuring methods to check the measured results before
commissioning if using other bypass fittings.
–
Avoid installations that allow air bubbles to form in the sample water.
–
Air bubbles, which adhere to the diaphragm of the sensor, can result in too low a
measured value. Too low a measured value can lead to incorrect metering within a
control circuit.
Also observe the instructions and safety information contained in the operating instructions
for the bypass fitting.
Installation instructions
Do not fit the sensor into a fully closed fitting. Open the sampling tap if there is not a free
outlet.
–
Only push in or pull out the sensor slowly to or from the bypass fitting. Otherwise the
diaphragm could be damaged.
–
Do not allow the diaphragm to come into contact with any objects to prevent damage to
and contamination of the diaphragm.
–
Always keep the sensor moist after commissioning, that is to say never allow the
bypass fitting to run dry.
Assembly
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