Instrument Type:

Optical detector

Related Commands:

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Description:

The command turns the lamp of an optical detector on and off. UV/VIS detectors often have a separate lamp (deuterium/tungsten) for each wavelength range. In this case, the commands are as follows:
UV_Lamp = On/off for the UV lamp
Vis_Lamp or Visible_Lamp = On/Off for the visible lamp

Function:

The lamp is turned on or off.

 Tips:

Almost all optical detectors require a considerable warm-up period for high sensitivity, drift-free operation. The inject command should therefore be placed several minutes (minimum) after this command. Note also that lamp(s) should never be turned off during a sample batch. Many laboratories operate detectors 24 hours a day with the lamp turned on.

Detector lamps are subject to aging. Check the current lamp age and lamp intensity at regular intervals. (also see LampAge, LampIntensity).

Stopping the flow or decreasing the flow to 0.00 ml may result in deposits in the detector flow cell. To avoid this, turn off the lamp in UV and fluorescence detectors when the flow is stopped.

For Dionex detectors, a warning appears if the lamp is not turned off. However, make sure that you have selected the installed pump from Link to Pump list on the General tab page for the detector in the Server Configuration program.