10.5 Meter Purge
Select “Meter Purge” from the pull-down menu under the Hours of Operation.
Warning:
An explosion may occur if the Prover is operated in the presence of explosive or
flammable gases. Always purge the Field Meter and all associated piping prior to running
any test. The Prover is not intrinsically safe.
The Field Meter and associated piping may be purged of all flammable gas with a hand-held blower or by
using the blowers on the Model 5 Prover. Observe any and all applicable company safety procedures and
rules for purging the meter and piping.
If the blowers on the Prover will be used for purging the Field Meter and associated piping, connect
as follows:
All Provers except 80M
If the Prover has two Master Meters, make certain the quick-disconnect nipple cap is plugging
the unused Master Meter's inlet quick-disconnect nipple.
1
. Isolate/remove the Field Meter from the gas line and allow any released gas to dissipate.
The Field Meter must be open to atmosphere at both the inlet and the outlet.
2.
Install a quick-disconnect nipple in the piping on the inlet side of the Field Meter, or directly
to the inlet of the Field Meter if the Field Meter has been removed from all piping.
3.
Connect one end of the flexible hose to the single exhaust/outlet male quick disconnect
nipple that is marked “Purge”. For the 10M and 20M Provers, the exhaust is located at the end
of the tank. For the Mobile 5, the exhaust nipple is part of the single blower assembly. Connect
the other end of the flexible hose to the quick disconnect nipple installed at the inlet side of the
Field Meter. The outlet of the Field Meter must be open to the atmosphere so as to allow air to
flush any gas from the meter and any associated piping.
4.
Observe all company safety procedures and rules for purging meters, and make the proper
connections listed above. Place the Model 5 Prover as far from the Field Meter as possible.
Place the exhaust from the Field Meter as far as possible from the Prover’s blowers. The
software must be configured for a meter purge, which is accomplished in either of two ways.
Refer to Prover Setup in the Help Directory for information about the Mandatory Meter
Purge Option. The other method is to configure a Meter Purge from the Maintenance Menu.
Select Prover Maintenance (<Ctrl+F6>) from the Prover Operations drop down menu, then
select Meter Purge. Select the appropriate Master Meter type from the drop down menu near
the bottom right of the screen. Enter the single flow rate at which to purge the meter into the
box in the middle of the screen. Click on the Start button to activate the blowers for the
meter purge.
Important: Do not over-speed the Field Meter.
5.
Allow the meter and the associated piping to purge for the required period to remove all
flammable gas from the piping and the vicinity of the Model 5 Prover.
6.
Select Stop to stop the blowers once the piping, meters, hoses, and the immediate area
are clear of gas.
10.6 Maintenance Recommendations
To maintain a high standard of accuracy for your ROOTS Prover, we recommend the complete
proving system be returned to the factory for Remanufacture & Recertification using one or more
of the following criteria:
1.
As dictated by State regulatory agency or Company procedure.
2
. Every three to five years, depending upon prover system condition and frequency of use.
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ROOTS
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Model 5 Prover Software Manual
