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  • Category :  Agilent Knowledge Portal
  • Entry Type :  Article
  • Product Type :  Analytical LC Systems Preparative LC Systems
  • Component :  LC Detectors
  • Product Name :  1100 Series LC System 1200 Series LC System 1260 Infinity II Bio-Inert LC System 1260 Infinity II LC System 1260 Infinity II Prime Bio LC System 1260 Infinity III Bio-Inert LC System 1260 Infinity III LC System 1260 Infinity III Prime Bio LC System 1260 Infinity III Prime LC System 1260 Infinity LC System 1260 Infinity II Prime LC System 1290 Infinity II Bio LC System 1290 Infinity II LC System 1290 Infinity III Bio LC System 1290 Infinity III LC System 1290 Infinity LC System
  • Task :  Maintenance
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Replacing the UV Lamp in Variable Wavelength Detectors (VWD)

Answer

This Information Applies To: Agilent Variable Wavelength Detector G1314x and G7114A/B modules.

Issue

As UV deuterium lamps ages, the light intensity decreases, the sensitivity of detection may deteriorate. Replace the lamp when the intensity test fails.

The number of hours of use or burn time on your installed UV lamp in your detector module is explained in the article Where to Check Hours on UV Lamp for Agilent UV Detectors?

A lamp change is also needed when the lamp no longer ignites, resulting in a lamp ignition error message on the detector.

Items Required

  • Screwdriver, Pozidriv #1 PT3 - Do not use a standard Phillips Head Screwdriver as damage to the screw could occur.
  • For G1314B/C VWD modules: Standard deuterium lamp (p/n G1314-60100) 
  • For G1314D/E/F and G7114A/B VWD modules: Long-life deuterium VWD lamp, with RFID tag (p/n G1314-60101) 

Steps to Follow

  
Warning: Risk of lesion by touching hot lamp and sharp metal edges.
If the detector has been in use, the lamp may be hot. Wait for the lamp to cool down before handling. Be careful of sharp RFI sheet metal at the rear of the heater fan. 
  
Warning: UV light exposure hazard.
Make sure that the VWD module is switched off at the front power switch, to avoid accidental lamp ignition attempts while working in lamp cover open.
  1. For G1314x modules, press the release buttons on the sides of the front cover to remove the cover and access to the lamp area. For G7114x modules, open the front module doors.
  2. For G1314B/C modules, unscrew the lamp cover screw marked in Figure 1 by the blue arrow. For G1314D/E/F and G7114A/B modules, remove the heater fan cover screw shown in Figure 2. Remove the cover to expose the lamp fitting.


    G1314B/C with lamp cover screw.
    Figure 1. G1314B/C with lamp cover screw.


    G1314D/E/F and G7114A/B module heater fan cover screw.
    Figure 2. G1314D/E/F and G7114A/B module heater fan cover screw.

  3. Squeeze the tabs on either side of the lamp connector together to release the connector and then unplug the lamp connector, shown in Figure 3.


    Release lamp connector.
    Figure 3. Release lamp connector.

  4. Unscrew the two lamp screws using a Pozidriv #1 PT3 Screwdriver, seen in Figure 4 in blue.


    Unscrew lamp screws.
    Figure 4. Unscrew lamp screws

      
    Caution: Do not touch the glass bulb of the new lamp with your fingers as it may reduce the light output.
  5. Remove the lamp and place it on a clean place.
  6. Insert the replacement UV lamp (for Long-live deuterium lamps RFID tag goes on top) and tighten the two lamp screws to hold the lamp in place, as shown in Figure 5. Do not overtighten the screws.


    Reinstalling lamp.
    Figure 5. Reinstall lamp 
    1. Insert new lamp, 2. Tighten two screws.

  7. Reconnect the lamp connector, like in Figure 6.


    Reconnect lamp connector.
    Figure 6. Reconnect lamp connector.

  8. Reinstall the lamp cover (G1314B/C modules, Figure 1) or the Heater fan cover (G1314 D/E/F and G7114A/B modules, Figure 2) and tighten the screw to secure the cover.
  9. Reinstall the front cover for G1314B/C modules or close the front doors for G1314 D/E/F and G7114A/B modules.
  10. Press the front power switch to turn on the module.
  11. For non-RFID tag lamps only: Reset the lamp hour counter. It can be found like described in Where to Check Hours on UV Lamp for Agilent UV Detectors?
  12. Turn on the lamp and give it more than 10 mins to warm up and equilibrate. Wait 60 mins for the detector to fully warm up, before performing any run.
  13. After detector warmup, in Agilent Lab Advisor under Service and Diagnostics, select your detector and click Wavelength Recalibration to ensure that the lamp is correctly positioned and working correctly.
  
Tips: The RFID tags used on Agilent UV lamps was changed to a new type in 2015. A firmware update may be required for the detector module to correctly read both new and old-type RFID tags on UV lamps. For more information, see the article Firmware Update Required if New RFID Tag Readers Used.

 

 
Learn how to effectively maintain/troubleshoot/operate you Agilent Infinity LC system:
Agilent Infinity LC e-learning paths available from Agilent education

 

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