WAGER 7500, Руководство пользователя, Страница: 29 / 36

2 7
Weight
5.0 lb.
3 lb.
w/o cables
APPENDIX D. DEFINITIONS
Follow Mode
A diagnostic mode that allows the unit to continuously read opacity and maintain a “peak hold”
reading. The alternate mode is Test Series Mode.
Opacity
The percentage of light transmitted from a source that is prevented from reaching a light
detector.
Preliminary Snap Acceleration Test
A series of Snaps (usually at least 3) performed before
testing begins to clear the exhaust system of residual particles.
Snap Acceleration Test
The engine is allowed to run at maximum RPM’s and brought back to idle.
Three “snaps” are taken for this test. Each individual test is stored and a mathematical formula applied
to provide an “average.” See Page 14 for step-by-step instructions.
SAE J1667
A document created to outline specifications to manufacturers of opacity meters, as well
as test criteria for performance of opacity (smoke) readings. Available for download on
www.wagerusa.com.