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Crystal Engineering Corporation
Non-repeatability.of.pressure.measurements
When checking the gauge against a hydraulic deadweight, increasing pressure measurements
do not match decreasing pressure measurements.
Reason:
As in the previous note, gas has dissolved into the hydraulic fluid. When decreasing
the pressure, the dissolved gas then leaves the fluid, but at an uneven rate, so small
pressure differential (due to fluid head pressure) may exist between the reference
deadweight and the gauge being tested.
Solution:
Evacuate all tubing with a vacuum pump, before introducing fluid into the system.
Slow.return.to.zero.and/or.non-repeatability.of.pressure.measurements
Reason:
Pressure port is obstructed.
Solution:
Clean with low pressure fluid.
Do not touch diaphragm as damage will result
Error.1.displayed
Reason:
The nVision checks the integrity of internal calibration coefficients every time it’s
turned on. If any coefficients have been corrupted in any way, “Error 1” is displayed.
Solution:
Contact factory for instructions on how to restore the memory to the original factory
settings.
Error.2.displayed
Reason:
The nVision has tried to display a number too large for the display (i.e., more than 6
digits). May be due to an electrical malfunction or numerical error.
Solution:
Contact factory for further instructions.
Error.5.or.Error.6.displayed
Reason:
The nVision pressure module (PM) is exhibiting out of normal operating condition
behavior.
Solution:
Contact factory for module replacement.
Error.7.displayed
Reason:
The nVision has lost communication with one or both of your modules.
Solution:
It may be possible to recover from this condition by removing and reconnecting your
modules using the Module Installation Instructions in this manual. This may happen
if you change modules but do not remove and replace the 4AA or AC Power to the
unit to force a complete reset of the product. Once this is done the module should be
recognized properly.
If unsuccessful in resolving the issue, contact factory for module
replacement.
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