Crystal Engineering Corporation Reference Pressure Recorder NV-4AA-RTD100-10MPA

Warning: Do not remove or change the batteries in a hazardous atmosphere

The nVision is Intrinsically Safe only if powered by one of the following battery types: Rayovac Maximum Plus 815, Energizer® E91, Energizer® EN91, or Duracell MN1500. The ratings and ambient temperature ranges vary so take care to determine if you are selecting the proper replacement for your requirement

Select the type of battery used

Unscrew the four captive screws (knurled Phillips head) to gain access to the battery compartment. Replace the batteries taking care to note polarity for their proper installation

After replacing the batteries and reinstalling the power module, the nVision will start operating immediately (without having to press the button); This indicates that a complete reset has occurred, and is normal. Verify the battery module is properly sealed and installed to maintain your IP67 rating

Failure to properly seal the battery compartment may allow water damage that could permanently compromise the nVision. IP67 rating will be void if nVision is operated without 4AA power module in place

Sign off on the battery replacement

Warning: Calibration should be performed by qualified personnel with appropriate training and equipment.

If adjustment is required, return the Vision or separate modules to the factory.

Under normal conditions, calibration should be done annually. Your quality system or experience may suggest different intervals.

Are calibration standards used have a minimum rated accuracy of 0.008% of reading?

There are no internal potentiometers. The nVision contains a 'span' factor (userspan), set to approximately 1 (as shipped from the factory).

Record displayed pressure for two or more pressure points.

Determine if the nVision would benefit from an overall increase or decrease of the indicated pressures. Adjust userspan accordingly and validate results.

Record displayed temperature for two or more temperature points.