Reference And Specification; Installation Notes - GE PACE5000 User Manual

PACE Pressure Controller User Manual
6

Reference and Specification

6.1

Installation notes

The PACE instrument pressure controller/calibrator requires an independent pressure supply and
set of connections with the exception of 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 (see data
sheet, specification). The supply gas density and type does not affect the accuracy of pressure
measurement; assuming that the UUT is at the same level (height) as the controller or gas head
correction is accurately set.
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 (recommended configurations shown in figures 2-3, 2-4 and 2-
5). 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.
Supply conditioning equipment
Supplies should be provided with an isolation valve and any other necessary conditioning
equipment.
Important note:
To protect the control module , for ranges above 100 bar,
from over-pressure a suitable protection device (such
as a relief valve or bursting disc) must be fitted to limit
the applied supply pressure to below the MWP.
Should the applied supply pressure exceed the MWP
the instrument may indicate this condition by
displaying this message.
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".
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