The OTC RM1020CPCL is a highly portable and efficient diesel emission tester designed for accurate smoke emission checks. This device is crucial for fleets to determine immediate compliance with state and interstate emission programs, helping to avoid costly fines and downtime. Its all-in-one design eliminates the need for an external PC, allowing a single operator to perform comprehensive tests.

Figure 1: The OTC RM1020CPCL Diesel Emission Smoke Check Tester, showing the main unit, handheld display, and the partial flow meter.
The system includes a partial flow meter that clips inside any smokestack, enabling testing in various weather conditions. It features a digital LCD screen that guides the user through each step of the testing process, culminating in a printout of results for verification. This model is widely recognized and utilized for enforcement in several states, including California, New York, and Illinois.
Before beginning, ensure all components are present and in good condition. The OTC RM1020CPCL package includes:
Connect the appropriate battery charger to the unit and a power source (vehicle or shop) to ensure the device is fully charged before use. The unit is designed for immediate operation without warm-up time once powered.
Follow these steps to conduct a diesel emission smoke check:
Regular cleaning of the unit, especially the partial flow meter and sensor head, is essential for accurate readings and longevity. Use a soft, dry cloth to wipe down the exterior. For the sensor head, follow specific cleaning instructions in the detailed product manual (not provided here) to avoid damage to sensitive components. Ensure the neutral density filter is clean and free of debris.
Store the OTC RM1020CPCL in its original carrying case in a cool, dry environment when not in use. Protect it from extreme temperatures, dust, and moisture to prevent damage to electronic components and sensors.
To maximize battery life, fully charge the unit after each use and before long-term storage. Use only the provided battery chargers. Avoid completely draining the batteries frequently, as this can reduce their overall lifespan.
This section addresses common issues you might encounter with the OTC RM1020CPCL.
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit does not power on. | Battery is depleted or not charged. | Connect the unit to a power source using one of the provided battery chargers and allow it to charge. |
| Inaccurate or inconsistent readings. | Partial flow meter or ambient sensors are dirty or obstructed. | Clean the partial flow meter and ambient sensors thoroughly. Ensure no obstructions are present in the smokestack. |
| Printer not producing output. | Printer paper is out, jammed, or the printer connection is loose. | Check and replace printer paper. Clear any paper jams. Ensure the internal printer connection is secure. |
| Error message on LCD screen. | Specific operational error or sensor malfunction. | Refer to the on-screen error code and consult the full product manual for detailed explanations and solutions. |
| Specification | Detail |
|---|---|
| Manufacturer | OTC |
| Brand | OTC |
| Model Number | RM1020CPCL |
| Item Weight | 34 pounds |
| Package Dimensions | 33.25 x 20.5 x 14.5 inches |
| ASIN | B009TC8YX0 |
| Date First Available | June 11, 2007 |
OTC is committed to providing high-quality tools and equipment. The OTC RM1020CPCL Diesel Emission Smoke Check Tester is backed by OTC's dedication to quality, ensuring reliable performance for professionals.
For detailed warranty information, technical assistance, or to inquire about replacement parts, please visit the official OTC website or contact their customer support directly. You can also visit the OTC Store on Amazon for more products and information.
![]() | OTC 4201 Accessory Kit Operating Instructions & Application Chart Detailed operating instructions and application chart for the OTC 4201 Accessory Kit, including adapter compatibility for various vehicle manufacturers. Learn how to connect nozzles to OTC adapters and connectors. |
![]() | OTC Heavy-Duty Powertrain Stands and Adapters - 1750, 1750A Explore OTC's heavy-duty powertrain stands and adapters, including the 6000 LB. Revolver Diesel Engine Stand (1750/1750A) and a comprehensive range of adapter plates for Caterpillar, Cummins, Allison, Detroit Diesel, Ford, International Harvester, John Deere, Mack, Navistar, and Volvo engines. |
![]() | OTC Scanning Suite 4.3 & OTC 3211 Update: Installation and User Guide Comprehensive guide for installing OTC Scanning Suite 4.3 and updating OTC 3211 Scan Tools. Includes step-by-step instructions for software installation, device updates, and data printing. |
![]() | OTC 7649A Fuel Injector Cleaner User Manual and Parts List Comprehensive user manual and replacement parts list for the OTC 7649A Fuel Injector Cleaner, including safety precautions, cleaning instructions, and decarbonizing procedures. |
![]() | OTC Specialty Tools & Equipment Catalog Explore the comprehensive OTC A12000 T&E Product Catalog, featuring a wide range of specialty tools and equipment for automotive engine service, including Ford, GM, and Chrysler applications. Find the right tools for your needs and use them for life. |
![]() | OTC A-31 Hearing Aid User Manual User manual for the OTC A-31 over-the-counter hearing aid, providing instructions on usage, charging, fitting, maintenance, and troubleshooting for adults aged 18 and older. |