1. Purpose

This document provides step-by-step instructions for replacing the detector cartridge on the Dräger Polytron 8200 gas detector.

2. Required Tools and Equipment

• DrägerSensor PR NPT DQ (Part Number: 6814150)
• Screwdriver (for set-screw)
• Replacement Detector Cartridge
• Calibration Gas (for post-replacement calibration)

⚠️ Warning: Always follow safety protocols when working in potentially hazardous environments.

3. Detector Cartridge Replacement Procedure

Step 1: Access Sensor Change Menu

1. On the Polytron 8200 device, navigate to:
   • "Settings > Sensor > Sensor Change"
2. Confirm the selection.

Step 2: Open the Enclosure

3. Loosen the set-screw on the enclosure.
4. Unscrew and remove the lid from the instrument.

Step 3: Remove the Old Detector Cartridge

5. Lift the handle and pull out the bucket containing the main electronics.
6. Remove the old sensor cartridge from its slot.

Step 4: Install the New Detector Cartridge

7. Insert the new DrägerSensor PR NPT DQ  into the sensor slot.

Step 5: Reassemble the Device

8. Place the bucket with electronics back into the enclosure.
9. Screw the lid back on until it is properly seated.
10. Tighten the set-screw securely.

Step 6: Power On and Calibrate

11. Power on the device and allow it to stabilize.
12. Perform a calibration of the new sensor following the manufacturer’s recommended procedure.

4. Post-Replacement Verification

• Confirm sensor communication and stability.
• Verify gas detection functionality through calibration.