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Photometric Analyzer
Before optical balancing:
a. Check your zero fluid to make sure it is within specifications.
b. Check for leaks downstream from the Sample Cell, where con-
c. Check flowmeter to ensure that the flow is no more than 200
d. Check temperature controller board.
e. Check sample temperature.
f. Check the Sample Cell for dirty windows.
g. Perform a Zero calibration in the manual mode.
h. Check for air bubbles in liquid applications.
If none of the above, proceed to perform an optical balance as described in
chapter 3, part II.
3.4.2 Span Cal
The Span function on the main menu is used to span calibrate the analyzer.
Span calibration can be performed in either the automatic or manual mode.
Make sure the span fluid is flowing to the instrument.
Observe all precautions in sections 3.4 and 3.4.2, above. Enter the span
function. The screen that appears allows you to select whether the span calibra-
tion is to be performed automatically or manually. Use the UP/DOWN
to toggle between AUTO and MAN span settling. Stop when AUTO appears,
blinking, on the display.
Enter to move to the next screen.
The unit field should be blinking first (%/ppm). Use the UP/DOWN switch
to set the proper unit of the span fluid and enter. Then, use the UP/DOWN
switch to set the concentration. When you have set the concentration of the
span fluid you are using, Enter to begin the Span calibration.
tamination may be leaking into the system.
SCCM for liquids and 1000CCM for gases.
3.4.2.1
Auto Mode Spanning
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Operation 3
SWITCH
Part I
3-19
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