Measurement; Balanced Pressure Method - oventrop OV-DMC 2 Operating Instructions Manual

Measurement

Some measurements are started directly from the menu "Valve-Setup"
("Cocon" valves and metering stations). The sequence of measurement is simi-
lar to the kv-value method and is also described under that point.
For all other regulating valves, the menu "Measurement-Setup", offers different
measuring methods:
Balanced pressure method/Data logging
Kv-value method Computer method
Balanced pressure method: The valve manufacturer as well as the valve
chosen in the submenu "Valve-Setup" is indicated. "Presetting" requires the
presetting of the valve to be measured. Input is completed by pressing the
key "OK". Now the measuring head is activated by the flow meter and the
bypass is closed automatically. The closing procedure is indicated by the rota-
ting symbols in the left and the right display corners. The closing procedure
being completed (indicated by symbol "I"), it still takes a short moment before
the pressure measured as well as the resulting flow rate is indicated.
Now the desired flow rate has to be entered. After having entered this value,
which is confirmed by pressing the key "OK", the flow meter calculates the
new presetting which it indicates as "presetting new". Now the valve has to be
preset according to the new value. By pressing the key "OK" the menu
"Check Measurement" is reached. Here, the new presetting value, the resulting
differential pressure and the old and new flow rate (in comparison) are indica-
ted. After having completed control, the beginning of the menu can be reached
by pressing the key
Attention: Each measurement with subsequent change of valve type
has to be completed by pressing the key
16
Differential pressure measurement
OV-Balance
and a new measurement can be carried out.
Measurement

Balanced pressure method

BALANCED PRESSURE
---------------------
---------------------
Hydrocon R DN 020
presetting new:
CHECK MEASUREMENT
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---------------------
Hydrocon R DN 025
presetting:
presetting:
mbar
l/h
l/h
mbar
l/h
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