1065.295—PM inertial balance for field-testing analysis.
(a) Application.
You may use an inertial balance to quantify net PM on a sample medium for field testing.
(b) Component requirements.
We recommend that you use a balance that meets the specifications in Table 1 of § 1065.205. Note that your balance-based system must meet the linearity verification in § 1065.307. If the balance uses an internal calibration process for routine spanning and linearity verifications, the process must be NIST-traceable. You may use an inertial PM balance that has compensation algorithms that are functions of other gaseous measurements and the engine's known or assumed fuel properties. The target value for any compensation algorithm is 0.0% (that is, no bias high and no bias low), regardless of the uncompensated signal's bias.
(c) Loss correction.
You may use PM loss corrections to account for PM loss in the inertial balance, including the sample handling system.
(d) Deposition.
You may use electrostatic deposition to collect PM as long as its collection efficiency is at least 95%.