Dresser Model 10C25 Series K Installation, Operation, and Maintenance Manual
© 2018 Natural Gas Solutions North America, LLC
Page 29 of 74
Volume Accumulation
Measured Flow Source
Forward
Reverse
Calculated Flow
Forward plus (+) Reverse
✓
✓
Volume in Reverse and Forward flow are calculated.
Calculated volume is the total of all flow in both directions.
Note:
The Factory default method for volume accumulation is Forward plus (+) Reverse to
allow for mounting in either flow direction and to prevent
‘
rollback
’
of the volume count.
For information about changing the accumulation method, refer to the
Dresser MeterWare
Software Manual
.
11.2.3
Volume Sample Frequency
Volume is sampled every thirty (30) seconds.
11.2.4
Volume Update Frequency
All parameters on the LCD are updated every thirty (30) seconds.
11.2.5
Pulse Output Frequency
Volume pulses are provided in real-time.
Form A outputs are configurable by:
•
Volume per pulse
•
Pulse width
•
Imperial or metric
The Form B fault/alarm pulse output is not configurable and provides a 500 ms pulse every thirty (30)
seconds when a fault or alarm is present.
11.3
Temperature Measurement
The ambient temperature is measured by using a Class A, PT1000 precision RTD and is sampled every
thirty (30) seconds.
In normal operation, the accumulated temperature Corrected Volume total is
•
Updated every thirty (30) seconds
•
Displayed in scf (standard cubic feet) or nm
3
(normal cubic meters)
•
Measured within the range of -40°F to +140°F (-40°C to +60°C)
The total ambient temperature effect is less than 0.1°F (0.05°C) over the entire temperature range.
Additionally, temperature measurement accuracy is graduated over the measurement range, as shown in
Table 7.
