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Flow Readings
Issue: How can I see ow in dierent units?
Action: From the Main Display, press the button below the ow reading
twice, and then choose Set button eng units. Use the UP/DOWN keys to
move the > cursor to the desired unit, and then press SET.
Issue: The live ow readings won't settle down.
Action: The ow controller is very fast, so it can detect subtle variations
in ow that may go unnoticed by your other ow devices. This
sensitivity can help detect problems with pumps or ow controllers.
You can lessen this sensitivity by decreasing the ow averaging
(press MENU > ADV SETUP > SENSOR SETUP > FLOW AVG
Issue: My ow readings are negative.
Action: Command a zero setpoint to see if the ow returns to 0 after 1.2
seconds. Under conditions of no ow, a negative ow reading can
indicate a poor tare. Ensure that the ow controller has no ow
passing through it, and select TARE FLOW from the Main Display to give
it a fresh tare.
Issue: Does the Alicat work if it is laying down? Will it be accurate?
Action: Yes to both! The ow controller is internally compensated for any
changes in orientation, so you can use it sideways, on its back, or
upside-down. S and QS-series devices should be tared again after
changing their orientation.
Issue: Can I put the Alicat on top of a vibrating device? Will it be accurate?
Action: Yes, and yes! The ow controller is internally compensated for any
changes in orientation, including rapid vibrations. Noise will increase
if the ow meter/controller is vibrating.
Issue: My controller does not agree with another meter I have in line.
Action: Check the STP or NTP settings (MENU > BASIC CONFIG > STP/NTP) to ensure
that your standardized temperature and pressure references match
those of your other ow calibrator. Also check thatyour device's Gas
Select is set to the right gas or mixture.
Issue: My ow readings won't change when ow changes.
Action: If your ow readings won't change regardless of actual ow, your
ow sensor may be damaged. Please contact Alicat to troubleshoot.
Issue: Can I use the Alicat with other gases?
Action: Yes! Your ow controller is designed specically to work with many
dierent gases. Gas Select (MENU > BASIC CONFIG > GAS) includes up
to 130 preloaded gases and gas mixes, or you can dene your own
using COMPOSER. If your desired gas is not listed, please contact
Alicat to ensure compatibility.
Troubleshooting Your Flow Controller
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