When

  • The lamp is defective

  • After a defined amount of operating hours of the lamp as a preventive measure

  • The lamp intensity is too low for demanding applications

  • The lamp intensity fluctuates causing artifacts in the baseline

Parts required

VIS lamp

Preparations

  1. Turn off the VIS lamp.

  2. Turn off the device.

Follow these steps

VIS lamp
Figure: VIS lamp

No.

Description

1

VIS lamp locating pin

2

VIS lamp

3

VIS lamp attachment screw

4

VIS lamp connector

  1. Open the doors.

  2. Turn the two screws on the lamp house cover counterclockwise until the lamp house cover is loose.

    Do not remove the screws completely from the lamp house cover.

    3. Screws on the lamp house cover
    Figure: Screws on the lamp house cover

  3. Remove the lamp house cover.

CAUTION

Hot surface

The lamp may become hot. Touching a hot lamp might cause burns.

  • Touch the lamp briefly and carefully to find out if it is hot before you remove the lamp.
  • If it is hot, wait until the lamp has cooled down.

  1. Push the clip on the lamp connector and disconnect the connector from the lamp socket on the device.

  2. With your hands, loosen the two screws that attach the lamp.

  3. Pull out the lamp.

  1. Align the new lamp with the locating pin.

    When the lamp is in the correct position, push the lamp gently into the lamp house. The lamp socket must be in a level position with the lamp house.

  2. When the lamp is properly seated, tighten the two screws to attach the lamp to the lamp house.

  3. Connect the lamp connector.

  4. Mind the routing of the lamp cables.

    Position the lamp cables as indicated in Replacing the VIS Lamp (Tungsten Lamp) to prevent the cable from being pinched under the lamp house cover.

  5. Install the lamp house cover and fasten the screws on the lamp house cover.

  6. Turn on the device with its main power switch.

  7. If you install a VIS lamp for the first time, activate the lamp in the chromatography data system:

    Only then, the VIS lamp can be ignited from the chromatography data system.

  1. Right-click the detector in the Instrument Configuration Manager.
  2. Select Properties on the menu.
  3. On the Detector page, enable the VIS Lamp check box.

  1. After replacing the lamp, increased noise and strong baseline fluctuations may occur. Before beginning an analysis or performing a wavelength validation, allow the new lamp to run until the noise is reduced and the baseline is stable which typically takes 24 hours.

  2. Perform a wavelength validation (see Performing a Wavelength Validation and Calibration).

TIP

The lamp age counter is automatically reset to the value stored on the ID chip of the lamp.