Teledyne 3060e - Ultra Trace oxygen analyzer - Manual (Page 83)

Teledyne Electronic Technologies
Analytical Instruments
4-35
Operations Operations Operations Operations Operations Ultra Ultra Ultra Ultra Ultra T T T T Trace Oxyg race Oxyg race Oxyg race Oxyg race Oxygen Anal en Anal en Anal en Anal en Analyz yz yz yz yzer er er er er
• You may abort auto settling by pressing
any key. Pressing
ACK
after abort will
return you to the Analyze mode main
menu.
5. In the Zero Calibration mode, the
screen displays whether the analyzer is
using the internal scrubber to automati-
cally create the zero gas or if an external
zero gas has been chosen. (See Setup
Mode: Zero Gas.) Press
ACK when the
background signal is stable and within
the applicable limit or
ESC to return to
the Analyze mode.
NOTE: The microprocessor will offset the raw background signal equiva-
lent to -10 to 150 PPB. If the background signal is outside the
acceptable limit, wait until the output reaches to within the
acceptable limit.
6. When background reaches within the
aceptable value, go to step 9. If ACK is
pressed while the background signal is
greater than the maximum allowable
value, the screen indicates
CANNOT
ZERO
.
BACKGROUND LEVEL MORE
THAN THE ACCEPTABLE VALUE .
NOTE: Higher background is primarily due to the presence of dissolved
oxygen in the solution. The time required for the removal of
dissolved oxygen from the electrolyte will depend on the initial
concentration of oxygen in the electrolyte. With a well prepurged
electrolyte, the output in the Zero mode will drop below the
acceptable limit within 2–4 days. If the background signal does not
fall below the aceptable limit after 5–7 days, replace the electrolyte
with freshly prepurged electrolyte. Replacing the electrolyte re-
moves the dissolved oxygen from the Ultra Trace sensor and the
background will will drop below the acceptable limit quickly.
VALVES: ZERO , INT SCRUB
% % % % W ARNING % % % %
USER ABO RTED AUTO SETTLE M O DE
--- PRESS ACK W HEN READY ---
1 2 3 4 5
ACK ESC
VALVES: ZERO , INT SCRUB
O XYG EN = 5.0 PPB O 2
FLO W = 150.0 CC/M IN
W ARNING : THE BACKG RO UND LEVEL
M UST BE > - 10 PPB AND < 150 PPB
TO ZERO . PRESS ACK W HEN STABLE
1 2 3 4 5
ACK ESC
VALVES: ZERO ING T=25C
O XYG EN = 0.5 PPM O 2
FLO W = 150 CC/M IN
CANNOT ZERO. BACKGROUND
LEVEL M O RE THAN 150 PPB
ACK TO CHANGE ELECTROLYTE
1 2 3 4 5
ACK ESC