Copyright 2008 Baker Hughes Company.
English–PACE5000/6000 Instruction Manual | 43
Installation Notes
6. Reference
6.1 Installation Notes
The PACE instrument pressure controller/calibrator requires an independent pressure supply
and set of connections. The exception is the reference connection, this provides a reference to
atmosphere for gauge sensors and barometric sensors.
The instrument must have the correct supply pressure and a suitable supply medium. Refer to
data sheet specification.
The type and density of the supply gas does not affect the accuracy of pressure measurement,
assuming that the Unit Under Test (UUT) is at the same height as the controller or gas head
correction is accurately set.
6.1.1 Gas Supply
For normal operation the instrument requires a positive supply of at least 110% of range but less
than the MWP, with a gas regulator.
For absolute operation, negative gauge operation or, if the installation requires a fast response
around atmospheric pressure, a vacuum source must be connected to the negative supply. For
recommended configurations
Figure 2-6, Figure 2-7 & Figure 2-8.
To achieve control performance the source pressure must be maintained at 10% full-scale above
the required set-point.
Controller performance is maintained during slow variations in source pressure down to a source
pressure of 20% full-scale range.
6.1.2 Supply Conditioning Equipment
Supplies should be provided with an isolation valve and any other necessary conditioning
equipment.
Note: For ranges above 100 bar (1450 psi), protect the control module from over-pressure by
using a suitable protection device such as a relief valve or bursting disc. This must be fitted to
limit the applied supply pressure to below the MWP.
6.1.3 Maximum Working Pressure
If the measured +ve source pressure exceeds the limits below then display a persistent message
box as shown.
Clear this message by selecting “OK”.
6.1.4 Supply Contamination
Supplies may need the removal of water, oil or particulate contamination. Any water in the
compressed gas supply will be in vapor form, i.e. non-condensing and must be removed using a
mist filter.
Oil must be completely removed as this causes a rapid deterioration of the control valve
performance.
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