Crystal nVision Lab Reference - Manual (Page 6)

Functions  4
nVision Operation Manual
Zero
To zero the nVision:
•
Press the
(
zero
)
button for at least 1 second while vented to atmosphere until the dashed lines (- - - - -) appear.
To clear the zero value:
•
Hold the
(
zero
)
button for 5 seconds until the display changes from (- - - - -) to the zeroed value, then to (- - -).
You can adjust the Zero Limit at which the
(
zero
)
button will display “- -HI- -” in CrystalControl. You can also disable the
(
zero
)
button
entirely, by setting the zero value to a negative number less than -15 PSI.
Note: If you attempt to zero the gauge with more pressure applied than the Zero Limit set in with CrystalControl, the command will be ignored, and “- -HI- -”
will display.
Note: You can never zero the BARO sensor.
!
WARNING: This gauge can display zero pressure when connected to a source of pressure! Do not rely on the display indication before disconnecting—
it may not be indicating true pressure. Never disconnect pressure instrumentation without first relieving system pressure!