Mettler Toledo 4000TOCe Kurzanleitung Seite 14

14 Service and Maintenance continued
CAUTION: Use of a UV lamp other than those provided by METTLER TOLEDO
Thornton specifically for use with the 4000TOCe Sensor will affect performance
and void the warranty of this product.
1. At the sensor, turn off the UV lamp by pressing the lamp control button (UV lamp ON
LED will turn off). If the LED does not turn off, check that the Sensor Key Lock is in the
off position in the M300TOC. Refer to Section 10.3.1 Sensor Key Lock function in the
operation manual.
2. Once power to the UV lamp is off, open the front cover of the sensor enclosure with
the front cover tool.
3. Remove the side cover labeled 'UV LAMP REPLACEMENT COVER' on the left side of
the sensor enclosure. Use a large-bladed flat-head screwdriver and turn the cover
counter clockwise to loosen and unscrew the cover.
4. Disconnect the power cable to the UV lamp. This connector is located on the backsi-
de of the front cover, above the circuit board.
5. Loosen the UV lamp holding screw located on the left side of the oxidation chamber.
6. Slide the cable of the UV lamp through the side opening of the enclosure and gently
slide the UV lamp out of the oxidation chamber assembly (stainless steel cylinder).
Be careful not to let the UV lamp hit the quartz glass tube inside the chamber.
7. Use the gloves supplied with each replacement bulb. Hold the new lamp from the
ends of the lamp. Do not touch the bulb. Slide the new UV lamp into the side opening
of the enclosure and into the oxidation chamber opening until it stops. Do not use
excessive force to insert the UV lamp as this may cause damage to the lamp or the
internal components of the oxidation chamber.
8. Tighten the UV lamp holding screw until snug. Do not over-tighten.
9. Feed the power cable through the side opening of the enclosure. Re-connect it to the
power connector on the front door.
10. Close front cover of the sensor and secure fasteners with the front cover tool.
11. Install the UV Lamp replacement cover on the opening on the side of the enclosure.
12. At the M300TOC, press the 'Menu' key, and select Path: Menu/Configure/TOC Setup/
Lamp Control. Press the 'Enter' key until 'Lamp Time Reset' is displayed. Select 'Yes',
then press enter twice to confirm your selection and save the changes.
13. After the lamp replacement has been completed, a TOC calibration must be perfor-
med. In addition, a System Suitability Test is recommended in applications where
compliance with Pharmacopeia regulations is necessary.
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