TotalFlow uFLO, Руководство пользователя, Страница: 61 / 132

3-11
Startup
µ
FLO
Put
µ
FLO On Line
To avoid a calibration shift, carefully follow these instructions.
Instructions Open both bypass valves and close the vent to atmosphere valve, this stabilizes the
pressure on both sides of the cell. Then begin to SLOWLY open the high side orifice
tap valve from the meter run. Then SLOWLY open the low side valve. Once both
the high and low sides are completely open, you may close both bypass valves.
Volume Reset
Since the
µ
FLO volume calculations are made each vol calc period, any changes you make during the
period would affect the volume calculations (such as changing the orifice plate size) and be introduced
into the calculations. To avoid introduced errors, it is recommended that Reset Volume command be
used. This command forces the
µ
FLO to perform volume calculations for the elapsed time since a
previous volume calculation was made. A new partial period volume is added to the volume
accumulator, which is logged as an event before it is reset to zero (0).
Description When you reset the volume accumulator the
µ
FLO will:
•
Store time, date and previous accumulated partial calc period volume into the
historical record file.
•
Zero the remaining partial calc period accumulation.
•
Complete all computations for the present flow file daily record.
•
Begin a new flow file daily record.
•
Zero total volume accumulator and log the event with an accumulator value
before zeroing out accumulator.