Teledyne 3060e - Ultra Trace oxygen analyzer - Manual (Page 74)

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Model 3060E Model 3060E Model 3060E Model 3060E Model 3060E Chapter 4 Chapter 4 Chapter 4 Chapter 4 Chapter 4
Teledyne Electronic Technologies
Analytical Instruments
6. The screen displays the oxygen content
and the flow rate. Use the UP and
DOWN buttons to scroll the span gas
concentration, and press ACCPT .
NOTE: Pressing the DOWN key while holding down the UP key (and vice
versa) increases the scrolling speed.
7. After pressing ACCPT to select the span
gas concentration, you can now select
between manual and auto settling.
8. If you have pressed MAN , the screen will
display the present oxygen concentra-
tion. The oxygen reading should rise
after the span gas starts flowing through
the Ultra Trace sensor. Wait until the
oxygen reading stabilizes, then press
ACK . Go to step 10.
NOTE: With the factory preset Ultra Trace span sensitivity (for details, see
Cold Start mode), the Ultra Trace sensor signal must be at least 1 /
3
of the selected span gas value to adjust the span sensitivity to a new
value. For example, if you use a 9.00 PPM span gas, the analyzer
should display at least 3 PPM in order to adjust the span to 9.00
PPM. If the signal is less than
1 /
3
of the selected span, stay in the
calibration mode until the signal is > 1 /
3
of the selected span. For
the first time the analyzer is switched to a span gas, the signal
output will slowly increase due to the slow wetting of the catalyst,
and after some time, reach a steady value. This is typical behavior
in a gas-diffusion electrode. (See Section 4.3.6.1 for details).
A span gas of any concentration (less than 10 PPM) can be used
to calibrate the analyzer. When you calibrate the analyzer at 10
PPM for the first time, or after the Ultra Trace sensor has been
exposed to zero gas for several weeks, the signal output during
calibration will slowly rise. The 90% response time in the Analyze
mode is 55–75 seconds. The last 10% response may take up to 30
minutes to stabilize.
VALVES: G AS SPAN
O XYG EN = 5.0 PPM O 2
FLO W = 150.0 CC/M IN
ENTER SPAN GAS CONCENTRATIO N
5.1 PPM
1 2 3 4 5
ESC ACCPT D O W N UP
VALVES: G AS SPAN
O XYG EN = 5.0 PPM O 2
CHOOSE M ANUAL OR AUTO SETTLING
1 2 3 4 5
ESC AUTO M AN
VALVES: G AS SPAN
O XYG EN = 5.0 PPM O 2
W HEN THE O2 READING STABILIZES
PRESS ACK FO R SPAN LEVEL
ADJUSTM ENT
1 2 3 4 5
ESC ACK