The source lamp used in the sensor has an operating life of approximately 2,000 hours. The lamp has reached the end of its useful life when the instrument becomes unstable or the lamp has gone out. The following procedure should be used when changing the source lamp.
Note: When replacing the source lamp, be careful not to scratch or fingerprint the glass envelope.
Retract the optical sensor from the line.
Turn off the power to the support unit. Allow the lamp to cool for five minutes prior to removing.
Remove the black lamp cover by pulling forward the latch located on the front cover.
Unplug the ceramic lamp connector carefully, as it may be hot.
Release the lamp-retaining wire by pressing the catch holding the wire in place.
Slide the lamp out, being careful not to touch the glass, as it can be very hot.
Slide the new lamp into place, making sure that the tab on the reflector rim lines up with the notch on the Teflon® ring. Be careful not to touch the bulb or the reflector, as fingerprints reduce lamp life appreciably. If a fingerprint is deposited, remove it using a clean wipe and isopropyl alcohol.
Reconnect the ceramic lamp connector. Note that lack of proper contact at the connector can be a major source of unsatisfactory instrument performance. Always check the lamp circuit when unsteady operation is experienced.
Close the black lamp cover and make sure the latch is in place to lock the cover.
Turn the support unit back on and allow the instrument to warm up for at least thirty minutes.
Perform primary calibration.
If additional assistance is required, you may contact HunterLab.