Part i 3-19 – Teledyne 6020 - Photometric analyzer User Manual

Page 43

Photometric Analyzer

Operation 3

Part I 3-19

Teledyne Analytical Instruments

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-

tamination may be leaking into the system.

c. Check flowmeter to ensure that the flow is no more than 200

SCCM for liquids and 1000CCM for gases.

d. Check temperature controller board.

e. Check sample temperature.

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.

3.4.2.1

Auto Mode Spanning

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

SWITCH

to toggle between

AUTO

and

MAN

span settling. Stop when

AUTO

appears,

blinking, on the display.

Enter

to move to the next screen.

: 2 . %

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.