5
Recommendations for use
Before taking any readings, we recommend checking device
settings, especially those regarding the type of medium used.
Remember that the sensor does not have to be connected to
enter all settings. If a change is made during measurement,
wait a few seconds for the device to readjust.
If the device is switched on after connecting the sensor, it will
take less time to display the current flow rate.
To assure the accuracy of the measurement, remove all air
from the system and use suitable strainers to prevent sludge
from building up.
Changes in the flow rate displayed may be caused by air in
the system.
Handle valves with care and be careful when adjusting and
handling them to prevent any excessive leakages of liquid
from the system.
The flow rate meter and sensor are electronic devices which
can be damaged when dropped, banged or used
inappropriately.
A form is provided at the end of this document, which can be
photocopied and used for future checks.
How to take a reading
1. Shut-off the valve that the sensor is to be inserted in,
making sure that all other valves are open.
2. Remove the lock, the ring and the cap (only remove the
cap if the valve is shut properly).
3. Insert the sensor holder cap, the ring and lock, checking
the position of each; if the valve is mounted horizontally,
use the discharge screw on the back to help insert the
sensor holder.
4. Fully open the valve with the sensor, using the knob then
connect the cable to the sensor and to the device.
5. Switch the device on and go to measurement mode.
Wait a few seconds for the flow rate in the circuit to settle and
for any air in the system to be ejected.
Slowly regulate the opposite shut-off valve and wait for
the system to settle at the required value (if the balancing
is repeated more than once due to their being several
branches in the circuit, extreme accuracy is not
necessary, especially the first few times).
Once the required flow rate has been reached,
disconnect the cable from the sensor.
6. Shut-off the sensor holder cap valve using the handle.
7. Remove the lock ring and sensor holder cap.
8. Insert the blind cap into the ball valve and secure the seal
ring with the lock.
9. Re-open the valve fully using the knob.
The ball valve used for regulation purposes does not
behave in a linear way and, for low flow rates in particular,
regulation may be difficult because small changes in the
ball valve will be associated with large changes in the
flow rate. Repeat this for all other manifold branches.
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