Cameron NUFLO MC-III, User Manual

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MC-III™ Panel Mount Flow Analyzer Appendix C
Base Units/Configured Units
The holding register area provides two blocks of registers. The first block is based on the configured units
of measurement. The configured volume units will follow the settings in the Volume Unit register (2000).
The configured rate units will follow the settings in the Rate Volume units (2002) and the Time-Base register
(2003).
For example, if the settings for the volume unit is 2 (BBL), all of the total parameters such as Grand Total
(17011), Daily Total (17015), etc. will be in terms of barrels. The values in these registers will change if the
user changes the units of measurement that appear on the LCD.
The second block is in terms of
base units. These register values are independent of the configured volume
units in the Volume Unit, Rate Volume Unit, and Time-Base registers. For base units, the time base is always
measured in seconds, and the volume and rate volume units are measured in gallons. If the standard correction
factor has been enabled, the volume unit is standard gallons. The standard gallon is calculated as the gallon
measurement times the Standard Measurement Correction factor (2059). If the x1000 unit is enabled, the
volume unit is gallons times 1000.
Conversion Factors
For base units, the volume unit and rate volume unit is measured in gallons.To convert gallons to another unit
of measure, use the conversion factors listed in the table below. For example, to convert gallons to barrels,
multiply gallons times 0.02380952381.
To Convert From Gallons To... Multiply By...
No units 1.00000000000
Barrels 0.02380952381
Cubic meters 0.00378541178
Cubic feet 0.13368055556
Liters 3.78541178400
Polling Registers
The MC-III device stores the volume accumulated since the last polling sequence in a set of polling registers
(17023). In addition, the instrument monitors the number of seconds of flow time in each polling interval
(17025). There is also an index to the number of polls requested (17039).
The polling sequence is started by writing to the Control Register. Writing the Control Register 1 (70) with
a value of 20000 decimal transfers the polling total (17023) and polling run time (17025), to the previous
polling total (17035) and previous polling run time (17037) registers, increments the polling index (17039)
register and resets the polling total and polling run time registers.
Pointer/Daily/Event Pointer (registers 17001 through 17006)
These registers provide an index of the last record that was stored in the log data. These values start at 1 and
increment with each newly created log. When the maximum number of records is reached, the pointer resets
at 1 and starts incrementing again.
Real Date (registers 17007, 17008)
This register is a floating-point representation of the date, formatted as MMDDYY. For example, a value of
91005 represents a date of September 10, 2005.