Alicat LC Series Liquid Flow Controller - Manual (Page 19)

19
MAIN
This mode defaults on power up, with flow
as the primary displayed parameter.
The following parameters are displayed in
the Main mode.
Line Pressure: Only on units equipped with
the optional pressure sensor, pressing
the PSIG button will move the line gauge
pressure to the primary display.
Line Temperature: Pressing the °C button
will move the process temperature to the
primary display.
Pushing the button again allows you
to select 0C (Celsius), 0K (Kelvin), 0F
(Fahrenheit) or 0R (Rankine) for the
temperature scale.
To select a temperature scale, use the LN-UP
and LN-DN buttons to position the arrow in
front of the desired scale.
Press SET to record your selection and
return to the MAIN display. The selected
temperature scale will be displayed on
the screen.
Tare: Pushing the TARE V button tares the
flow meter and provides it with a reference
point for zero flow. This is an important
step in obtaining accurate measurements.
It is best to zero the flow meter each time it is powered up. If the flow reading
varies significantly from zero after an initial tare, give the unit a minute or so to
warm up and re-zero it.
If possible, zero the unit near the expected operating pressure by positively blocking
the flow downstream of the flow meter prior to pushing the TARE button.
Zeroing the unit while there is any flow will directly affect the accuracy
by providing a false zero point. If in doubt about whether a zero flow
condition exists, remove the unit from the line and positively block both ports
before pressing the TARE button. If the unit reads a significant negative value
when removed from the line and blocked, it was given a false zero. It is better
to zero the unit at atmospheric pressure and a confirmed no flow condition
than to give it a false zero under line pressure.
It is not uncommon for a meter to read a small value when it is removed from
the process line as water can “hang” in one or both of the differential pressure
sensor ports. If the unit reads a significant negative value when removed from
the line and blocked, it is a good indication that it was given a false zero.
#C
+21.50
+0.000
CCM MENU
TARE V
CCM
PSIG
+13.60
LN-DN
CANCEL SET
MODE
>#C
#K
#F
#R
LN-UP
+0.00