38 Troubleshooting
Pressure Readings
Issue:
My controller won’t reach its setpoint.
Action:
You must ensure that there is enough supply pressure to reach the
setpoint. If increasing the pressure doesn’t help, check to see if
there is a clog. Teflon tape can get stuck in the flow channel and
block flow (see
). Make sure to clean out any loose Teflon
tape and never tape the first two threads entering the device to help
avoid this issue
Issue:
My pressure readings are negative.
Action:
If there is no flow or positive pressure, then a negative pressure
reading can indicate a poor tare (see
). Ensure pressure
is at zero, and tare.
Issue:
My pressure readings jump to zero when pressures are low.
Action:
Check the dead band (or “display as zero”) settings, which will round
down all values below a specified point to zero (see
Issue:
Does the controller work if it is laying down? Will it be accurate?
Action:
Yes to both for small valve controllers! The pressure controller is
internally compensated for many situations, so you can use it side-
ways, on its back, or upside-down. For upside-down installations,
you may want to rotate the display 180° (
). However, they
should be tared again after changing their orientation. Large-valve
controllers (PCR- and PCR3-Series) should be operated with the
valve cylinder vertical and upright.
Issue:
Can I attach the controller to a vibrating device? Will it be accurate?
Action:
Yes, and yes! The pressure controller is internally compensated for
any changes in orientation, including rapid vibrations. Noise will
increase if the pressure controller is vibrating. Large-valve controllers
are not recommended for use on vibrating surfaces.
Issue:
Can I use the controller with other gases or liquids?
Action:
Yes for gases, maybe for liquids. Your pressure controller is designed
to operate independent of the media being used. One thing to
check before changing gases or liquids is the chemical and material
compatibility of the gas being used with the wetted materials inside
the controller. We also recommend contacting support (
)
before switching over to liquid pressure control.
