Introduction
This manual provides essential instructions for the proper use and maintenance of Supco CR87-20 Circular Chart Recorder Paper. This paper is specifically designed for use with compatible Supco chart recorders, offering a 31-day recording cycle for temperature ranges from -20 to 50°F. Each box contains 60 sheets of 6-inch diameter circular chart paper.
For optimal performance and accurate data recording, please follow the guidelines outlined in this document.
Setup
- Verify Compatibility: Ensure your chart recorder is a Supco CR87B or CR87J series model, or another model specified as compatible with 6-inch, 31-day, -20 to 50°F circular chart paper.
- Prepare the Recorder: Open the recorder's cover and ensure the pen arm is lifted or disengaged from the chart plate.
- Load the Chart Paper: Carefully place a new sheet of Supco CR87-20 chart paper onto the recorder's chart plate, aligning the center hole of the paper with the spindle. Ensure the paper lies flat and the outer edge is correctly positioned within the recorder's guides.
- Align Time and Date: Rotate the chart paper until the current time and date on the chart align with the recorder's time indicator.
- Engage Pen Arm: Gently lower the pen arm so that the pen tip rests on the chart paper. Ensure the pen is making proper contact without excessive pressure.
- Close Recorder: Securely close the recorder's cover to protect the chart paper and internal mechanisms.

Image: Supco CR87-20 Circular Chart Recorder Paper. This image shows the product packaging and the circular chart paper, illustrating its design and size for proper identification before loading into a compatible recorder.
Operating
- Continuous Recording: Once loaded and the recorder is activated, the chart paper will rotate, and the pen will continuously mark the temperature over the 31-day period.
- Monitoring: Periodically check the recorder to ensure the pen is marking correctly and the paper is advancing without obstruction.
- Chart Replacement: At the end of the 31-day cycle, or when the recording is complete, replace the chart paper following the 'Setup' instructions.
- Data Interpretation: Read the recorded data by observing the pen's trace against the pre-printed temperature and time scales on the chart paper.
Maintenance
- Storage: Store unused chart paper in its original packaging in a cool, dry place away from direct sunlight and extreme temperatures to prevent degradation.
- Handling: Handle chart paper by the edges to avoid fingerprints or smudges on the recording surface, which could affect pen movement or data readability.
- Recorder Cleanliness: Regularly clean the chart recorder's plate and pen arm to ensure smooth paper rotation and accurate pen contact. Refer to your specific recorder's manual for cleaning instructions.
- Disposal: Dispose of used chart paper responsibly according to local regulations.
Troubleshooting
- Paper Not Advancing:
Solution: Ensure the chart paper is correctly seated on the spindle and not obstructed by the recorder's casing or pen arm. Check that the recorder's motor is functioning. - No Markings on Paper:
Solution: Verify that the pen arm is lowered and the pen tip is making contact with the paper. Check the pen for ink flow or damage. Replace the pen if necessary. - Inaccurate Readings:
Solution: While the paper itself does not cause inaccurate readings, ensure you are using the correct chart paper for your recorder's specified temperature range (-20 to 50°F for this model). Calibrate your recorder if readings remain inconsistent. - Paper Jamming:
Solution: Ensure the paper is not bent or damaged before loading. Check for any foreign objects inside the recorder that might impede paper movement.
Specifications
| Model Number | CR87-20 |
| Brand | Supco |
| Chart Diameter | 6 inches |
| Chart Speed | 31 Day |
| Temperature Range | -20 to 50°F |
| Quantity per Box | 60 sheets |
| Compatibility | Supco CR87B and CR87J series recorders |
Warranty
This Supco CR87-20 Circular Chart Recorder Paper comes with a 1-year Universal Guarantee. This guarantee covers manufacturing defects and ensures the product meets its specified standards under normal use. Please retain your proof of purchase for warranty claims.
Support
For further assistance, technical support, or inquiries regarding the Supco CR87-20 Circular Chart Recorder Paper, please contact Supco customer service. Refer to the contact information provided with your Supco chart recorder or visit the official Supco website for support details.