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32 Operating instructions
Section 3: Operation Operating and maintenance instructions
January 2015 3-9008-701 Rev J
If the plenum pressure is greater than the calculated value, the excess pressure must be vented
from the plenum. If the plenum pressure is less than the calculated value, the supply bottle will
need to furnish the necessary pressure needed. Connect the supply bottle according to
manufacturer’s instructions and charge the spring plenum to the required pressure.
Notes:
1. As a guideline, spring plenum pressure should be within 0 to +5% of the calculated
pressure.
2. If prover installation is vertical, use 40 psig in the above formula in place of 60 psig.
3. For provers equipped with the automatic plenum adjustment panel, plenum pressure
should be automatically adjusted before the proving cycle begins. The operating
computer should be configured for this application. See Section 2.2.4 and Section 5.4
for troubleshooting. For vertical provers with plenum adjust panel, consult factory for
new “R” value.
4. With the hydraulic system motor not running, check to see that the hydraulic reservoir
is filled to approximately 75% capacity. If not, fill tank to proper level using hydraulic
fluid specified inSection 1.4.
5. Turn on the hydraulic pump. The hydraulic pressure should build to 380-400 psig (27-
28 kg/cm ) once the piston reaches the upstream (stand-by) position.This is verified by
the hydraulic system pressure gage, typically located on the hydraulic pump (Figure 3-
7).
6. Slowly open the inlet valve to allow the process fluid to flow into the prover.
EXPLOSION HAZARD
Regulate the pressure of the supply source to the allowable level and avoid exceeding the
maximum working pressure of the tank.
Failure to do so during the filling of the Nitrogen Tank could result in serious personal injury.