WAGER 7500, Руководство пользователя, Страница: 11 / 36

9
TECHNICAL SPECIFICATIONS
Design Criteria
The Wager Model 7500 Smoke Meter meets SAE J1667 specification, Appendix C, using the required
algorithm.
Accuracy
The unit’s accuracy is ± 1.0% nominal ± one digit. The system is initially calibrated under clear stack
conditions with checks at 0% and 100% opacity.
The accuracy of the unit is verified by use of the .2 Melles Griot neutral density filter supplied with the
system.
Ambient Conditions
The unit operates in 32° to 120° F (0° to 50° C).
Please note that under N.J.A.C 7:27B-24, additional ambient conditions apply. This is addressed under
“NJ Ambient Conditions”.
Reliability
Zero stability at less than 1% drift per use. The pulsed green LED has infinite life expectancy. Check
filter provided for easy calibration. All solid state electronics.
Applications
The Model 7500 Smoke Meter can be used on any diesel engine, with primary applica-
tion in testing trucks, busses, and cars. Contact WAGER for special applications, such as stand-by
power, mining operations, railroad use, boating/maritime, industrial, etc.
Functional Description
The sensor head consists of two components, a light source (transmitter) and a light detector (receiver).
When the unit is activated, the transmitter emits a light beam at a known intensity. As the light passes
through the smoke plume, some or all the light is diverted.
The light detector measures the amount of light received, and compares this with the amount of light
being emitted. The difference between the two values is opacity.