Teledyne 6650 - Fluorescence Probe - Oil in Water analysis system - Manual (Page 27)

UV-Photo-X Setup & Operation
Teledyne Analytical Instruments 19
iv. Depress the SPN CHK button to remove the filter
from the beam path. The FLTR-IN indicator will
change from red to green.
v. Wait 2 minutes for the output to stabilize and the
unit should display the calibration sample level.
vi. Both the REF and MSR DET LEDs should have
solid green or flashing green output.
f) The unit is now ready for process monitoring.
3) There is no need to adjust the 4mA and 20 mA levels for process
monitoring, since the presence of analyte will move the
fluorescence level along the calibration curve determined by the
user during the application engineering studies.
Instructions for adjusting the 4mA, 20 mA, and display levels are
given below if the user wants to adjust the levels.
5.5 Adjusting the Display
The display values can be adjusted for both Mode 1 and Mode 2
operation using the following instructions. For clarity the directions
describe changing the display following a Mode 1 initialization since the
Fluorometer, will display a value easily correlated to a process variable.
Figure 3-1
can be used to locate all the adjustment points described.
1) Immerse the probe in a process sample, preferably with a
known analyte concentration and therefore fluorescence
level.
2) The Fluorometer is always configured in USER MODE.
The display is displaying the fluorescence intensity in
arbitrary counts.
3) The display and 20 mA output levels are interrelated in
USER MODE. Consequently adjusting the display value
alters the 4-20 mA output signal level.
4) The display adjustment is the right of the display. The
adjustment is designated USR SPAN CONTROL
5) Display Adjustment (Mode 1 initialization) a) The
calibration sample is being monitored b) If the display
reading is close to 1000 counts (off by <100 counts) use the