§3175.132. Testing of reference accuracy.
43 C.F.R. § 3175.132
The following reference test conditions must be maintained for the duration of the testing:
Ambient air temperature must be between 59 °F and 77 °F and must not vary over the duration of the test by more than ±2 °F;
Relative humidity must be between 45 percent and 75 percent and must not vary over the duration of the test by more than ±5 percent;
Atmospheric pressure must be between 12.46 psi and 15.36 psi and must not vary over the duration of the test by more than ±0.2 psi;
The transducer must be isolated from any externally induced vibrations;
The transducer must be mounted according to the manufacturer's specifications in the same manner as it would be mounted in normal field operations;
The transducer must be isolated from any external electromagnetic fields; and
For reference accuracy testing of differential-pressure transducers, the downstream side of the transducer must be vented to the atmosphere.
Before reference testing begins, the following pre-conditioning steps must be followed:
After power is applied to the transducer, it must be allowed to stabilize for at least 30 minutes before applying any input pressure or temperature;
The transducer must be exercised by applying three full-range traverses in each direction; and
The transducer must be calibrated according to manufacturer specifications if a calibration is required or recommended by the manufacturer.
Immediately following preconditioning, the transducer must be tested at least three times for accuracy under § 3175.131(h). The results of these tests must be used to determine the transducer's reference accuracy under § 3175.135.
Notes, amendments, and revision history
Source
Source: 81 FR 81609, Nov. 17, 2016, unless otherwise noted.
Authority
Authority: 25 U.S.C. 396d and 2107; 30 U.S.C. 189, 306, 359, and 1751; and 43 U.S.C. 1732(b), 1733, and 1740.
Source
Source: 81 FR 81421, Nov. 17, 2016, unless otherwise noted.