Pressure

Installing the TP-1

The TP-1 System includes an installation manual in electronic form on the supplied CD.

Physical Installation of the TP-1 controller


The TP-1 is manufactured in an all weather enclosure with waterproof electrical connections suitable for outdoor installation. If physical security is not an issue, the system can simply be placed at any convenient location. Outdoor locations providing some protection from physical damage and from the elements may be advisable, such as the petroleum facility shown in Figure


IIn some instances the TP-1 controller can be co-located with other electronic systems to facilitate power and communications connections.

 


If the TP-1 is to be permanently installed, a separate mounting container and electrical conduits may be warranted.
Hydraulic Installation of the Pressure Transducer

The standard pressure transducer provided with the TP-1 has a ¼” male NPT thread that is standard in the industry. Unless otherwise requested by the user, we will supply a transducer operating range of vacuum to 500 psi. The transducer should be mounted as close to the main column of water (or other liquid) as possible in such a configuration as to avoid the formation of air pockets in the open throat of the transducer or in any connection conduits. The standard transducer is weatherproof, meaning it is suitable for installation in normal environmental conditions; if the transducer is to be submerged for long periods of time, a special submersible transducer should be specified by the user.

It is advisable to install the transducer with adequate valves to allow it to be isolated from the pipeline to facilitate installation and removal. A small ball valve is recommended. Where feasible, it is also advisable to configure the installation so that there is a means of bleeding any air from the system by having another small valve on the downstream side of the transducer, an example is shown in the figure.

This will also prove to be a convenient means of generating pressure transients to test the system once installation in complete, and obviously is not feasible where flammable liquids are being measured.

Special transducers are available for explosive liquids meeting the most stringent safety standards. An explosion-proof transducer with a usable pressure range of vacuum to 3000 psi. The standard explosionproof transducer used by Pipetech International will have male 1/4 inch NPT thread, and will be tested and marked as Class 1, Division 1, Groups A, B, C, D Explosionproof, a maximum ambient operating temperature of 85 C (185 F), and a working pressure range of -14.7 to 3000 PSI. Other pressure ranges are available.

Aside from protection against physical damage or freezing of the liquid being measured, the TP-1 should require no further measures.

Power for the TP-1
The TP-1 requires approximately 375 milliamps of direct current power at a range of 11 to 18 volts, which is normally provided by the alternating current power adapter supplied with the TP-1 system. This power can also be supplied by any suitable battery. When coupled with solar panels, the TP-1 is capable of operating indefinitely on a battery and solar panel system.

Transients can be caused by electrical power failures that provide energy to pumps on the pipeline, and these transient pressures may be the most severe, and therefore of greatest interest to the pipeline operator. To avoid the possibility of losing power to the TP-1 at the time it may most critically needed, the operator should consider installing an uninterruptable power supply, or UPS, to provide backup power to the TP-1 during such an event. These are available through Pipetech International, or from most computer stores.

Communications Link

Users will communicate with the TP-1 system for the purposes of:

  • Setting the parameters for data recording and transient recognition
  • Starting and stopping the device
  • Uploading data from the TP-1 to a storage device such as a PDA, laptop or desktop computer

The communication can be accomplished by any of three methods:

  • A wired LAN connection is available, enabling a wired link between a storage device such as a laptop computer and the TP-1
  • A wireless connection is standard, and each TP-1 system includes a Personal Digital Assistant (PDA) with internal wireless card. A wireless antenna is provided with the TP-1 and should be mounted to facilitate communication with the operator at normal wireless ranges of a few hundred feet.
  • An Internet/broadband cellphone capability is available. For any TP-1 installed where cell phone coverage is available, the used can access the TP-1 from any computer with internet access. A broadband antenna will be provided with TP-1 systems configured for this communications capability.