# Title 43

## SECTION 3175.143

### 3175.143 Required dynamic tests.

§ 3175.143 Required dynamic tests.(a) *Square wave test.* The pressures and temperatures must
be applied to the software revision under test for at least 60
minutes as follows:

(1) *Differential pressure.* The differential pressure must
be cycled from a low value, below the no-flow cutoff, to a high
value of approximately 80 percent of the upper calibrated limit of
the differential-pressure transducer. The cycle must approximate a
square wave pattern with a period of 60 seconds, and the maximum
and minimum values must be the same for each cycle;

(2) *Static pressure.* The static pressure must be cycled
between approximately 20 percent and approximately 80 percent of
the upper calibrated limit of the static-pressure transducer in a
square wave pattern identical to the cycling pattern used for the
differential pressure. The maximum and minimum values must be the
same for each cycle;

(3) *Temperature.* The temperature must be cycled between
approximately 20 °F and approximately 100 °F in a square wave
pattern identical to the cycling pattern used for the differential
pressure. The maximum and minimum values must be the same for each
cycle; and

(4) At the conclusion of the 1-hour period, the following hourly values must meet the criteria in § 3175.141(d):

(i) Volume;

(ii) Integral value;

(iii) Flow time;

(iv) Average differential pressure;

(v) Average static pressure; and

(vi) Average flowing temperature.

(b) *Sawtooth test.* The pressures and temperatures must be
applied to the software revision under test for 24 hours as
follows:

(1) *Differential pressure.* The differential pressure must
be cycled from a low value, below the no-flow cutoff, to a high
value of approximately 80 percent of the maximum value of
differential pressure for which the flow computer is designed. The
cycle must approximate a linear sawtooth pattern between the low
value and the high value and there must be 3 to 10 cycles per hour.
The no-flow period between cycles must last approximately 10
percent of the cycle period;

(2) *Static pressure.* The static pressure must be cycled
between approximately 20 percent and approximately 80 percent of
the maximum value of static pressure for which the flow computer is
designed. The cycle must approximate a linear sawtooth pattern
between the low value and the high value and there must be 3 to 10
cycles per hour;

(3) *Temperature.* The temperature must be cycled between
approximately 20 °F and approximately 100 °F. The cycle should
approximate a linear sawtooth pattern between the low value and the
high value and there must be 3 to 10 cycles per hour; and

(4) At the conclusion of the 24-hour period, the following hourly and daily values must meet the criteria in § 3175.141(d):

(i) Volume;

(ii) Integral value;

(iii) Flow time;

(iv) Average differential pressure;

(v) Average static pressure; and

(vi) Average flowing temperature.

(c) *Random test.* The pressures and temperatures must be
applied to the software revision under test for 24 hours as
follows:

(1) *Differential pressure.* Differential-pressure random
values must range from a low value, below the no-flow cutoff, to a
high value of approximately 80 percent of the upper calibrated
limit of the differential-pressure transducer. The no-flow period
between cycles must last for approximately 10 percent of the test
period;

(2) *Static pressure.* Static-pressure random values must
range from a low value of approximately 20 percent of the upper
calibrated limit of the static-pressure transducer, to a high value
of approximately 80 percent of the upper calibrated limit of the
static-pressure transducer;

(3) *Temperature.* Temperature random values must range
from approximately 20 °F to approximately 100 °F; and

(4) At the conclusion of the 24-hour period, the following hourly values must meet the criteria in § 3175.141(d):

(i) Volume;

(ii) Integral value;

(iii) Flow time;

(iv) Average differential pressure;

(v) Average static pressure; and

(vi) Average flowing temperature.

(d) *Long-term volume accumulation test.* (1) Fixed inputs
of differential pressure, static pressure, and temperature must be
applied to the software version under test to simulate a flow rate
greater than 500,000 Mcf/day for a period of at least 7 days.

(2) At the end of the 7-day test period, the accumulated volume must meet the criteria in § 3175.141(d).