Hach-Lange DR 3900 User Manual - Manual (Page 130)

130
Maintenance
4. Install the lamp holder in the instrument.
Note: Take care that the lamp cable is not pinched by the cable
guide.
5. Using a cross-head screwdriver, tighten the two lamp holder
screws.
6. Replace the lamp cover.
7. Using a slot-head screwdriver tighten the cover screws.
8. Connect the power cable to the instrument.
9. Reset the lamp operating time section 6.8.8, page 123 .
7.3 Exchange of the replaceable cell compartment
If there is severe soiling, the complete cell compartment (2) can
be replaced.
1. Switch off instrument.
2. Remove the power cable from the instrument.
3. Using a cross-head screwdriver, undo the two screws on the
floor of the cell compartment.