General Operating Instructions
EXCESS GAP LENGTH MAY CAUSE EXCESSIVE STRAIN ON CONNECTION ASSEMBLIES.
c. Remove the connections and install one connection piece in each end of the facility pipe gap provided in step 4b.
Allow for the gaskets at the inlet and the outlet spuds of the meter.
d. Install the meter, making sure that the flow arrow marking on the meter housing is in the correct relationship to the
direction of the fluid flow in the system.
e. Tighten the meter connections. Note the instructions on packaging from connection assembly when tightening.
f. To relieve any possible strain on the facility piping that might be caused by the weight of any of the large size meters,
consider incorporating a meter support under the housing of the meter.
To ensure that the meter has been properly installed and is operational:
1. Slowly open the upstream valve to apply uid pressure to the meter. Check the connections for any possible leakage.
Retighten the connections as required.
2. Perform a functional test of the meter following "Calibration Check and Adjustment" on page 6.
GENERAL OPERATING INSTRUCTIONS
In general, the operation of a Model RCDL disc meter is either manually controlled or accessory controlled. Manual operation
applies to the applications employing hand-operated valves or other manually activated, flow-regulating devices that are not
functionally controlled by a meter accessory. Accessory controlled operation applies to applications when a meter accessory
provides a signal output to activate and/or deactivate a valve or other flow control device.
VALVES CONTROLLING THE FLUID FLOW THROUGH THE METER SHOULD BE OPENED AND CLOSED SLOWLY TO
PREVENT SHOCK LOADS THAT MAY DAMAGE THE METER MEASURING ELEMENT.
Manual Operation
The following procedures are for use in simple metering applications where the flow of fluid is controlled by hand-operated
valves located upstream and downstream of the meter.
1. Slowly open the upstream valve to apply uid to the meter.
2. Slowly open the downstream valve to initiate the metering operation.
3. Adjust the downstream valve so the ow rate of the uid does not exceed the maximum continuous ow rate specication
of the meter.
OTE:N On meters with an accessory device providing a totalizing indicator, the flow rate of the fluid can be checked by
timing the number of gallons registered in one minute.
4. To stop metering, slowly close the downstream valve; then close the upstream valve.
Accessory Controlled Operation
Operating procedures for accessory controlled applications are dependent on the specific function of that accessory
employed and its electrical interconnection with a flow control device or devices. Refer to the bulletin or bulletins covering
the applicable accessories for specific operating instructions (included as a supplement to this manual when required.)
Shutdown Instructions
If the meter is to be shut down for an extended period of time, first flush out the measuring chamber of the meter to prevent
the settling out of undissolved solids or the accumulation of corrosive deposits.
Page 5 September 2014 RDM-UM-01089-EN-06
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