Upon plugging in, the digital screen will display blinking characters, usually a dash (-), and the "State" or "Alarm" light may flash. This allows the sensor to stabilize.
A: Go to System Settings > Security > Set Password. The default is 0000. The manual warns: if you forget the password, you must send the unit back for a factory reset – there is no backdoor.
To get the most out of the BRJ-502 manual, here are a few tips to keep in mind: Brj-502 Manual
| Error Code | Display Message | Likely Cause | Manual Solution | |------------|----------------|--------------|------------------| | | "Input Short" | An analog input is drawing >30mA on a 4-20mA loop | Check sensor wiring; install a 250Ω resistor if loop powered externally | | E-204 | "Watchdog Trip" | CPU did not reset its timer (firmware hang) | Cycle power. If recurring, update firmware via USB | | E-307 | "Output Overload" | Relay output current >5A or inductive kickback | Add a snubber (RC circuit) or a flyback diode. Reduce load | | E-412 | "Comm Timeout" | Modbus RTU master not responding | Verify baud rate (default 9600, 8N1) and cable length (<50m) | | E-515 | "ADC Failure" | Analog-to-digital converter not reading | Replace unit. This is a hardware fault. |
During this time, the "STATE" light will flash green and the screen will show flashing characters. Upon plugging in, the digital screen will display
: When plugged into a wall outlet, the device will emit two short "Beep, Beep" tones.
Once safely outside the structure, contact your local gas utility provider or emergency services. Do not re-enter the home until professional technicians declare it safe. 5. Routine Maintenance and Care The default is 0000
: Visual strobe paired with a loud siren measuring ≥is greater than or equal to 85 decibels (dB) at a distance of 3 meters.
Use the digital interface to input your desired settings (speed, pressure, or duration).