Hach Lange 2100AN, Instrument Manual

Page: 94 / 108

94
SECTION 11,
continued
PRECAUÇÃO
Quando a Lâmpada estiver acesa e a proteção de lâmpada estiver removida, use protetor
ocular.
2. Remove the access panel to expose the lamp compartment (see Figure 22).
Squeeze the two latch tabs together, and pull out on the panel.
Figure 22 Lamp Replacement
3. Use a small screwdriver to loosen the two screws securing the lamp leads in
the lamp terminal block. Pull the leads free.
4. Remove the two Phillips screws securing the lamp holder in the instrument
(upper left-hand corner and lower right-hand corner). Remove the entire lamp
assembly.
Note: Do not touch the lamp; oil from skin will cause damage. Clean the lamp with alcohol
if necessary.
5. Secure the new lamp assembly in place using the two Phillips screws (do not
over-tighten).
6. Insert one stripped lamp lead under each of the positions in the lamp terminal
block. Either lamp lead can be inserted in either terminal block position.
Tighten the terminal block screws to secure the leads (do not over-tighten).
Replace the lamp compartment access panel and restore power to the
instrument.
Note: The lamp output is stabilized at Hach; no “burn-in” time is required. However,
warm-up the lamp for a minimum of 60 minutes before calibrating the instrument.
7. Recalibrate the instrument as described in Section 3.2.4 on page 39. New
turbidity standards must be prepared (refer to Section 3.2.2 on page 37 and
Section 3.2.3 on page 37).