VPT10-H
HART
®
PRESSURE TRANSMITTER
INSTALLATION, OPERATION, CONFIGURATION AND MAINTENANCE MANUAL
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VPT10-H pressure transmitter is designed to withstand harsh environmental conditions. However, to ensure stable
and accurate operation for a long time, the following precautions must be observed when selecting an installation
location.
(1) Ambient Temperature
VPT10-H has an intrinsic algorithm to compensate temperature variations. In the production process each transmitter
is subjected to several cycles of temperature and a polynomial is created in order to minimize temperature variation,
ensuring high performance of pressure measurements at any temperature. However, it is recommended to avoid
locations subject to large variations in temperature or temperature gradients. If the site is exposed to radiant heat,
provide adequate thermal insulation or ventilation. Also, facilities where process fluid can freeze inside the transmitter
chamber should be avoided, which could cause permanent damage to the capacitor cell.
(2) Atmospheric Conditions
Avoid installing the transmitter in a corrosive atmosphere. If necessary, provide adequate measures to prevent or
minimize intrusion/stagnation of rainwater or condensation that may accumulate through the electrical input. In
addition, proper precautions should be taken in regard to corrosion due to condensation or moisture at the terminal
block. Inspect it regularly, checking for proper closure of its covers. The covers must be completely closed manually
until the o-ring is compressed, ensuring complete sealing. Avoid using tools in this operation. Be careful not to remove
housing covers in the field, as each opening introduces more moisture to the circuits.
(3) Shock and Vibration
Select an installation location subject to minimum shocks and vibrations. Although the transmitter is designed to be
relatively resistant and insensitive to vibration, it is recommended to follow good engineering practice. Mounts close to
pumps, turbines or other equipment that generate excessive vibration should be avoided. If vibration is unavoidable,
install the transmitter on a solid base using flexible hoses that do not transmit vibration.
(4) Installation of Transmitters with Explosion Proof Certification
Transmitters with this certification must be installed in hazardous areas according to the classification of the area for
which they are certified. Installations in classified areas should follow the recommendations of standard
NBR/IEC60079-14.
(5) Accessibility
Always select a location that provides easy access to the transmitter for maintenance and/or calibration. If so, rotate
the LCD for proper viewing.
When the measured fluid contains suspended solids, install valves at regular intervals to clean the tubing (discharge).
Clean pipes internally (using steam or compressed air) or drain the line with the process fluid itself, whenever possible,
before connecting these lines to the pressure transmitter.
Do not allow steam to enter the measuring chamber. Close the valves well after each drain or discharge operation.