TELEDYNE API T100U, Addendum To The Operation Manual

Page: 28 / 66

Troubleshooting and Service Teledyne API - T100U Manual, Addendum to T100 Manual P/N 06807
26
LAMP POSITIONING
The UV output level of the lamp is uneven across the entire length of the lamp. Some
portions of the lamp shine slightly more brightly than others. At the factory the position
of the UV lamp is adjusted to optimize the amount of UV light shining through the UV
filter/lens and into the reaction cell. Changes to the physical alignment of the lamp can
affect the analyzer’s ability to accurately measure SO
2
. See Section 12.7.2.5 of the T100
Manual for instructions on adjusting the lamp position.
8.3.1.1 Adjusting the UV Lamp
(
Peaking the Lamp)
CAUTION – GENERAL SAFETY HAZARD
Always wear safety glasses made with UV blocking material when
working with the UV Lamp assembly. (Generic plastic safety glasses are
not adequate).
1. Set the analyzer display to show the signal I/O function, UVLAMP_SIGNAL (see
Section 12.1.3 of the T100 Manual.
2. Slightly loosen the large brass thumbscrew located on the shutter housing (see
Figure 8-1) so that the lamp can be moved.
3. While watching the UVLAMP_SIGNAL reading, slowly rotate the lamp or move it
back and forth vertically until the UVLAMP_SIGNAL reading is at its maximum.
•
Best peak intensity will occur when the dot (or arrow) on top of the lamp is pointing in the
direction of the reaction cell.
•
Ideally, the reading should be 4000mV±200mV.
•
If UVLAMP_SIGNAL is lower than 600mV, replace the lamp.
•
If UVLAMP_SIGNAL is greater than 4400 mV, adjust the pot on the UV reference board
down until the output reads 4400 mV, and then continue to peak the lamp.
ATTENTION
COULD DAMAGE INSTRUMENT AND VOID WARRANTY
DO NOT grasp the UV lamp by its cap when changing its position -
always grasp the main body of the lamp (refer to Figure 8-1). Inattention
to this detail could twist and potentially disconnect the lamp’s power
supply wires.
06840B DCN 6201