2021.08.19 REV. PRESSURE CONTROLLER OPERATING MANUAL 23
Troubleshooting
If you run into trouble with your device’s installation or operation, please get in touch with support (page 16).
General Use
Issue: My device does not turn on or has trouble staying on.
Action: Check power and ground connections. Please reference the technical specifications to assure you have the proper
power for your model.
Issue: The buttons do not work, and the screen shows LCK.
Action: The device buttons were locked out via a serial command. Press and hold all four outer buttons to unlock the interface.
Issue: I can’t read the display easily.
Action: During the day, increasing contrast or brightness will help the display’s visibility (page 19). For monochrome displays
under low-light conditions, push the bottom button located below the display to turn on the backlight (page 19).
Issue: The analog output signal indicates values lower than what appears on my instrument’s display.
Action: Analog signal voltage degrades over long distances. You can minimize this eect by using wires with a heavier gauge,
especially in the ground wire.
Issue: How often do I need to calibrate my device?
Action: Annual recalibrations are recommended. Check your device’s last calibration date by selecting
MENU
→
ABOUT
→
About
Device. If it is time to recalibrate, get in touch with support (page 16).
Issue: I dropped my device. Is it OK? Do I need to recalibrate?
Action: If it turns on and appears to respond normally, then it is probably OK. It may or may not need a recalibration. Give it
a tare, and compare it against a pressure standard you know is accurate. If it checks out, keep using it, but tell your
calibrator about the drop at your next annual recalibration.
Issue: How can I see pressure in dierent units?
Action: From the main menu, select SETUP → Sensor → Engineering Units. For more information, see page 17.
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. 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 a negative reading is not expected, your device may need to be tared (page 11). Ensure pressure is at zero, and
tare it.
Issue: My pressure readings jump to zero when pressures are low.
Action: Your device is equipped with a programmable zero band that is preset at the factory. Reduce your deadband threshold
by selecting SETUP → Sensor → Zero Band.
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 sideways, on its back, or upside-down. For upside-down installations, you may want to rotate the display
180° (page 19). 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: My pressure controller disagrees with another device I have in line.
Action: Pressure devices can normally be compared against one another provided there are no leaks between the two devices.
Another possibility is an improper tare error (page 11).
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