MACH 10 Residential Ultrasonic Meter Installation and Maintenance Guide 19
Activating and Reading MACH 10 Ultrasonic Meters
Consumption and Unit of Measure
The consumption display contains all nine digits, including leading
zeros and a decimal point. The value displayed is the sum of the forward
flow minus the reverse flow. The dial face framing the LCD has black
and white markings to represent the equivalent of white and black
number wheels on mechanical registers.
Table 8 MACH 10 Icons and Displays
Icon Description Status
Explanation
Leak Icon used to indicate a leak. Leak status is
determined by keeping track of the number
of 15-minute intervals where the volume
consumption exceeds Vmin in the previous
24-hour period.
Vmin is factory programmed depending on
meter size. It is defined as a change of the
9th digit of the LCD.
OFF Number of 15-minute intervals
<50.
Flashing 50 <
Number of 15-minute
intervals < 95.
Continuous ON Number of 15-minute intervals >
95.
Forward and reverse
flow
Icons used to indicate the forward and
reverse direction of flow.
OFF Rate of flow < 0.01 GPM.
Continuous ON Rate of flow > 0.01 GPM.
High flow warning Icon used to indicate excessive flow which
can be a burst pipe.
OFF Rate of flow < 20 GPM.
ON Rate of flow exceeds 20 GPM
for more than 30 minutes.
Empty pipe Icon used to indicate if the pipe is empty or
there is excessive air in the line. If this
occurs, there is no receive signal in the
expected time window.
OFF Typically OFF. If the icon has
been ON, it is switched OFF if
>10 correct samples are
received in a row.
ON Turned ON if no receive signal is
seen for 1 minute.
Battery status Icon used to indicate time and voltage of
remaining battery life.
OFF >1 year of battery life remaining.
Time since first power ON < 19
years.
Continuous ON <1 year of battery life remaining.
Time since first power ON > 19
years.
Continuous
FLASHING
Low battery or time since first
power ON > 20 years.
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