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GasAlertMicro 5 Replacing Sensors and Batteries, Updating Firmware
Replacing or Changing Sensors
- Remove two bolts near alligator clip
- Remove pump or diffusion cover
- Remove problem sensor
- Install new
- Power up and calibrate
PID Sensor Repair
- When PID sensor fails
- Clean lamp
- Replace electrode stacks
- Replace lamp
- Carries one year warranty
- If all else fails replace sensor
Firmware
- Current Firmware Versions
Serial Number Prefix Firmware Version SS1 23i SE1 and SK1 23c SS3, SE3 and SK3 37 Ex: SK106-003054
- Updating Firmware
- Use chart to determine correct firmware version
- Ensure rechargeable batteries are fully charged or new alkaline batteries
- Remove datalogging memory card
- Install upgrade memory card
- Turn on monitor and enter passcode 1007
- Press blue button and allow upgrade to complete
- Remove upgrade memory card and re-install datalogging memory card
PID Cleaning and PID Disassembly
- If lens surface is scratched or contaminated
- Sensor sensitivity will be greatly reduced
| Detector Usage | Cleaning Frequency |
| Daily use (40 hrs/wk) | Every 60 days |
| Infrequent use (10 hrs/wk) | Every 90 days |
M5 Repair Tips
| Problem | Repair |
| CO2 shows negative | Properly zero sensor using pure N2 |
| Monitor keeps failing PID even with new sensor | Replace sensor board |
| Monitor clicks instead of starting up or does not start up at all | Remove PID sensor (can happen to any M5), replace LCD Screen |
| Battery pins don |