TotalFlow uFLO, User Manual, Page: 59 / 132

3-9
Alarm Limits
You have the ability to set
µ
FLO Alarm Limits for the parameters listed in table 3–4. There are many
purposes for setting these limits. i.e. Controlling well output, or sending digital signals.
Table 3–4 Alarm Limits
Configurable
Parameter Default Value Units AGA-3 1985 AGA-3 1992
DP High Limit 2047.9688 In H2O Yes Yes
DP Low Limit 0 In H2O Yes Yes
Flow Rate High Limit 1,000,000 SCF/Hr Yes Yes
Flow Rate Low Limit 0 SCF/Hr Yes Yes
RTD High Limit 420 Degrees F Yes Yes
RTD Low Limit 0 Degrees F Yes Yes
SP High Limit 2047.9688 PSIA Yes Yes
SP Low Limit 0 PSIA Yes Yes
Reset Volume
When you Reset the volume accumulator the
µ
FLO will:
•
Store time, date and previous accumulated partial calc periods volume into the historical record file
•
Zero the remaining partial calc periods accumulations.
•
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.
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).