TECHNICAL SPECIFICATIONS
The R.H.W. Series 2 Full Flow Smoke Opacity Meter meets the SAE J1667 specification for diesel
emission testing.
Accuracy
The system is designed to be accurate or – 1.0% opacity. The control unit self calibrates each
time it is powered on under clear stack conditions with self tests at 0% and 100%.
Ambient Conditions
Normal operating temperature ranges from 32^ to 120^ F (0^C to 50^C). Ambient corrections of the
measured opacity can be enabled or disabled prior to testing. If ambient corrections are enabled, the
unit will output the corrected opacity reading.
Reliability
Zero stability at less than 1% drift per use.
The backlit TFT display boasts of over 20,000 hours life span.
Optics being pulsed instead of steady on provides extended life of the light source.
Carrying / storage case made of heavy grade material has a life time warranty.
All solid state and state of the art electronics.
Applications
The system is designed for use on any diesel engine, either off-road or on-road, to determine the
engines particulate matter (soot).
Functional Description
Powering on the unit, the operator is found at the main menu of the software. Selecting the snap
acceleration test option, the HC searches the data base for the current testing location
information. At this point the HC also searches the wireless channel to detect other devices (SH,
printer) and initializes communications. During the snap test, the unit self-calibrates, testing 0% and
100% limits and then emits a pulsed light beam across the width of the full flow yoke. The system
knows how much light is being emitted, knows how much light is being received, and calculates
the difference and displays % opacity.
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