Section 3 Operation; Introduction - Teledyne UA-6 Installation And Operation Manual

UA-6 Detector

Section 3 Operation

3.1 Introduction

The basic operation of the UA-6 consists of selecting the settings
for sensitivity, noise filtering, peak separation (if applicable) and
the built-in chart recorder. Once the flow cells and filters have
been selected and installed, the following steps should be fol-
lowed for starting operation.
1. Move the STANDBY/OPERATE switch to the OPERATE
position.
With a Type 11 optical unit: The LED will be red for the
first 10 minutes of operation. After 10 minutes the LED
will change to green indicating the lamp current is set and
ready for operation. Should the LED change back to red
d u r i n g o p e r a t i o n t h e l a m p c u r r e n t m a y r e q u i r e
adjustment. See Section 4 for adjusting lamp current.
Note
Under normal conditions the LED should not change from
green to red.
An ambient temperature change of more than 15° C or a weak
lamp are generally the cause of lamp current to go out of regu-
lation. After an intermittent power loss, if the UA-6 power LED
does not return to green, see Section 4 for adjusting lamp
current. Should the UA-6 power LED flicker red/green, this indi-
cates the 1140 lamp is also flickering. See Table 5-1, Section 5.
2. Select the sensitivity setting and allow the UA-6 to warm
up until it stabilizes with solvent flowing through the cells.
For detection in 0.5, 1.0 and 2.0 AUFS range, a minimum
of 15 minutes is needed. For operation at the 0.005 or 0.002
AUFS ranges, several hours of warm-up may be required
for stable operation.
3. Baseline the detector (see Section 2.8.)
4. Select the settings for the noise filter (see Section 3.9),
peak separator (see Section 3.11.1) and chart speeds.
Uncap the chart pen and lower the pen onto the paper.
The UA-6 is now ready for operation.
3-1