Section 3 -Maintenance
Because of the functional design and reliability of the
SPECTRONICCIJ 20+ and 20D+ spectrophotometers.
routine customer maintenance has been reduced to
replacement of the 6.0-volt, 3.00-amperes source lamp
(Cat. No. 333385). SPECTRONIC'J 20 and 20D
models also require replacement of the phototube (see
Table 2-2).
/'
1
".
°-
.-J
-I
I
I
5
3
Note: The source lamp has a nominal life of 250
hours.
~./"
The operator may also perform routine checks for
wavelength calibration and photometric accuracy.
Figure 3-1
Lamp replacement
4. Lamp flange
5. Locating pins
6. Terminals
Lamp Replacement
KEY
1. Lamp
2. Lamp socket
3. Mounting bracket
6. Install a new lamp by properly aligning the large
openings in the lamp flange with the locating pins.
Press the lamp and the lamp socket toward each
other and rotate the lamp clockwise until secure.
~ Do not touch the lamp with your fingers!
7.
Clean the lamp of fingerprints and oils, close the
door and tighten securely. This is essential for
proper operation.
I. Turn off and unplug the instrument.
2. Tilt up the unit and set on its back.
3. Loosen the thumbscrew on the lamp access door and
open the door (see Figure 1-3).4.
Using finger pressure, press the lamp socket toward
the mounting bracket (Figure 3-1).
Note:
.Do not push on the lamp socket tenninals. This will
inhibit the installation of a new lamp.
& Do not touch the lamp with your fingers!
5. To avoid getting skin oils on the surface of the lamp,
use the Lamp Gripper supplied with the instrument
to grip the lamp. Push the lamp toward the lamp
socket and rotate counterclockwise to remove it.
To Next Page
Loading...
Need help?
General
