Omega Vortex FV100 Series User Manual page 11

Shedding flowmeter & temperature
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CONFIGURATION (Setup) continued...
The next parameter, relay function, will automatically appear. It may indicate "nc", normally closed, or
"no", normally open. Pressing the MENU button will change the relay function from one to the other.
To select the desired relay condition, merely press the SET button. The relay function selected is at the
normal flow condition, above set point. So, by selecting "no", the relay will be open above the set point
and close on reaching the set point or lower. Conversely, if "nc" is selected, the relay will be closed
above the set point and open at or below set point.
Once the relay function is set, the meter will return to the run mode. If no flow is present, the meter
should display zeros and the LED adjacent to the unit of measure not selected will be flashing to indicate
a low flow condition (unless a set point of zero was selected).
FV100-T includes the features of FV100 plus temperature. FV100-T has a second set of LED's adjacent
to the SET button. One is labeled F, for degrees Farenheit, and the second C, for degrees Celcius.
To setup the flow portion of FV100-T, the flow variable must be displayed. Pressing the MENU button
one time, toggles between the displayed variables of flow and temperature. Press the MENU button
once if temperature is the displayed variable. Then complete the setup for the flow variable as, described
above under FV100.
To configure the temperature portion of FV100-T , press the MENU once, if the temperature variable is
not displayed. Temperature, since it is being measured on power up, will be displayed as degrees F or C
dependent upon the status of the LED indicators adjacent to the two units of measure. To enter a set
point, hold the MENU button down until "t", then "AL" are displayed, consecutively. The display will
then indicate the set point. To change, press the MENU button to step the value upward, or hold the
MENU button down to quickly ramp up the setting, releasing as the desired value is approached, and
then pressing incrementally until the set point is reached. Then press the SET button to enter the se-
lected value. Again, as in the flow set point, if the set point is passed, continue holding the MENU
button down and it will roll over to zero and continue increasing until released and incremented slowly
to the desired value. After selecting the set point the meter will return to the run mode.**
**NOTE: The relay function for temperature is the same as selected for flow. If the "nc", normally closed condi-
tion is selected for flow, it will also function the same way for temperature. The relay function (status) is always at
the normal condition. So, if "nc" is selected, the relay will be closed above the flow set point and below the
temperature set point. That is because we are normally looking for a low flow condition and a high temperature
condition in cooling applications. When either set point is reached for flow or temperature, its respective relay
will change state. The set points, when selected in either GPM or LPM and F or C, will automatically con-
vert to the correct value, if the other unit of measure is selected.
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