Badger Meter Compound Series - Manual (Page 10)

MAINTENANCE
This section is limited to information pertaining to the general maintenance of Badger Meter Recordall Compound Series
meters An exploded view of the meter, along with part numbers and descriptions, are provided in the Recordall Compound
Series Meters Parts List
Accuracy Testing
The Compound Series meter can be tested for accuracy with a test meter or a test tank of known volume A test plug is
provided on the meter The low flow register is for recording the amount of water passing through the disc, or low flow side
of the meter The high flow register is for recording the amount of water passing through the turbo, or high flow side of
the meter
When testing at flow rates below the meter’s cross-over point, only the low flow test hand will move Record the initial reading
(low flow odometer and low flow test circle) To determine the amount of water that has passed through the meter during
test, take the new reading from the low flow test circle If more than one revolution of the test circle, take a new reading from
both the low flow odometer and the low flow test circle The difference between the initial and final reading is then compared
to that recorded by the test meter or test tank
When testing flow rates at or above the meter’s crossover point, the high flow and low flow register test hands will move
This is because both sides of the meter, disc and turbo, operate simultaneously at these flow rates The disc side of the meter
operates at all flow rates to keep the chamber free of debris that might enter the meter Record the initial readings (high flow
odometer and high flow test circle, low flow odometer and low flow test circle) If less than one revolution of the high flow
test circle, record both the new high flow and low flow test circle readings The amount of flow recorded by the high flow and
low flow test circles during test must be added together to determine the total flow through the meter Compare this to that
recorded by the test meter or test tank
If more than one revolution of the high flow test circle occurs, take new readings from the low flow odometer, high flow and
low flow test circles and add all complete high flow test circle revolutions to this Once again, the amount of flow recorded by
the high flow and low flow test circles must be added together and combined to determine the total flow through the meter This
is then compared to that recorded by the test meter or test tank
A simplified alternative to recording the initial and final odometer readings on the high flow and low flow odometers, is to
record the number of complete revolutions of the test hand on the high flow and/or low flow test circles during test This is
then added to the difference between the initial and final position of the test hands on the test circles to determine the total flow
through the meter
For correct testing procedures, and test volumes based upon meter flow rates, please refer to AWWA M-6 Manual Starting the
test when the register test circle hands are on zero and operating the meters through complete revolution of the test circles
are desirable operating procedures to follow
THE TEST HANDS OPERATE INDEPENDENTLY OF ONE ANOTHER. FOR EXAMPLE, DURING METER OPERATION AT FLOWS
BELOW CROSSOVER, THE LOW FLOW TEST HAND WILL REVOLVE WHILE THE HIGH FLOW TEST HAND IS STATIONARY,
ALLOWING HIGHER READINGS ON THE LOW FLOW ODOMETER ONLY.
Maintenance Equipment
The tools and equipment recommended for use in servicing and maintaining of Recordall Compound Series meters consist of
the usual complement of hand tools used by plumbers and mechanics
Preventive Maintenance
The purpose of preventive maintenance is to ensure efficient operation and long life of the meter by detecting and correcting
any defect that might damage the meter or cause it to fail Preventive maintenance consists of periodic inspection, accuracy
testing, and cleaning procedures
Recordall® Compound Series Meter, Sizes 2", 3", 4" and 6"
Page 10 September 2013