Copyright 2011 Baker Hughes Company.
4 | DPS 8000 Instruction Manual–English
The materials used for the primary enclosure and pressure bearing surfaces are identified in the
product data sheet or, if applicable, the specification drawing. Make sure that the materials are
applicable for the installation.
Before using the equipment, remove the plastic/rubber protection cap from the pressure
connector.
The 80XX, 82XX and 83XX are harsh media isolated product. Isolation is achieved by
hermetically sealing the sensor element, see Figure
2, in an oil filled chamber. The weight of this
oil gives a g sensitivity as a pressure offset error.
The 81XX is not a harsh media isolated product. The pressure media comes directly into contact
with the sensor element. Care must be taken to ensure the pressure media does not damage the
sensor element. There is negligible change in offset due to mounting position and vibration.
Figure
2: TERPS Sensor Element
To calibrate the 8XXX
Series, the unit is mounted vertically with the pressure port at the lowest
point. Orientation other than this produces a pressure offset error as specified in the data sheet.
The error is most noticeable at lower pressure ranges.
Note:
The g-sensitivity will also create an error in a high vibration environment and the unit should
be mounted accordingly.
3.2 Safety Measures
The operation of sensors in systems whose pressure may exceed the overload values specified
in the data sheet or customer-specific specification drawing is not allowed.
Connection and detachment of sensors from the mains supplying the pressure of the medium to
be measured must be done after the shutoff valve is closed from the process and the pressure in
the working chamber is made equal to atmospheric.
The connecting pipes must have a one-way slope (not less than 1:10) from the pressure collection
point up to the sensor, if the medium to be measured is gas, and down to the sensor if the medium
is liquid. If this is not possible, when measuring gas pressure at the lower points of the connecting
lines, it is necessary to install sludge vessels, and when measuring the liquid pressure at the
highest points, install gas collectors.
Selected devices for mounting sensors should be mounted on straight sections, at the maximum
possible distance from pumps, locking devices, elbows, expansion joints and other hydraulic
devices. It is especially not recommended to install sensors in front of the shut-off device if the
Summary of Contents for Druck DPS 8000 Series
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