If an error is not listed in the manual, look for a “Diagnostic Mode” described in Chapter 8. This allows you to view raw ADC counts for inputs and manually toggle outputs.
The device uses a semiconductor sensor and an intelligent microprocessor (MCU) to detect gas concentrations. LED Display
: Flashes rapidly alongside the audible siren when gas is detected. System Evolution Sequence
Cause: Poor PID tuning values or using generic factory defaults for a complex thermal mass.
A: No, these detectors are designed for home use with a fixed calibration. They typically do not require user calibration. You only need to test them monthly. Brj-502 Manual
: Once warm-up completes, the device sounds a brief tone, the yellow light shuts off, and the digital display shows a solid "0" . Only the green power light remains illuminated.
Solution: Swap the positive and negative sensor wires at terminals 8 and 9.
Solution: Re-run the sequence outlined in the section above. If you'd like to narrow down these steps, let me know: What sensor type (K-type, Pt100, etc.) you are using?
Do not install the detector in high-humidity areas, directly above a sink, or in dead-air spaces (e.g., corners, directly against walls). B. Setup Process Unpack: Remove the detector from its packaging. If an error is not listed in the
By following the guidelines outlined in this manual, you will be able to safely and effectively operate your Brj-502. If you have any questions or concerns, please do not hesitate to contact our customer support team.
Solution: Check power across your heating element circuit. Ensure the OUT light on the controller matches the physical state of your relay.
No. The BRJ‑502 requires AC power. If you live in an area prone to power outages and use gas appliances, consider also purchasing a battery‑powered gas detector or a backup power source.
Upon initial power-on, the device enters a . During this time, it may not register gas leaks, and the display may show a countdown or flash. Operation and Usage Instructions LED Display : Flashes rapidly alongside the audible
Let’s walk through a real-world scenario: configuring the Brj-502 to control a water cooling loop with a 4-20 mA valve actuator and a PT100 temperature sensor.
) Arrows: Increases or decreases the value of the selected flashing digit.
The most-thumbed section of any Brj-502 Manual is the troubleshooting table. Here are the five most common error codes with root causes and solutions.