Teledyne 3000TA-XL-EU, Operating Instructions Manual

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Operation 3000TA-XL-EU
Teledyne Analytical Instruments 50
information on Slope (unless the Slope starts within the acceptable zero
range and does not need to settle further).
Then, and whenever Slope is less than 0.08 for at least 3 minutes,
instead of Slope you will see a countdown: 5 Left, 4 Left, and so fourth.
These are five steps in the zeroing process that the system must
complete, AFTER settling, before it can go back to
Analyze
.
#### PPM Zero
4 Left=### ppm/s
The zeroing process will automatically conclude when the output is
within the acceptable range for a good zero. Then the analyzer
automatically returns to the
Analyze
mode.
4.4.1.2 M
ANUAL
M
ODE
Z
EROING
Press Zero to enter the Zero function. The screen that appears
allows you to select between automatic or manual zero calibration. Use
the ▲▼
keys to toggle between
AUTO
and
MAN
zero settling. Stop when
MAN
appears, blinking, on the display.
Zero: Settling: Man
<ENT> To Begin
Press Enter to begin the zero calibration. After a few seconds the
first of five zeroing screens appears. The number in the upper left hand
corner is the first-stage zero offset. The microprocessor samples the
output at a predetermined rate. It calculates the differences between
successive samplings and displays the rate of change as Slope= a value
in parts per million per second (ppm/s).
#### ppm Zero
Slope=#### ppm/s
Note: It takes several seconds for the true Slope value to display.
Wait about 10 seconds. Then, wait until Slope is sufficiently
close to zero before pressing
Enter to finish zeroing .
Generally, you have a good zero when Slope is less than 0.05
ppm/s for about 30 seconds. When Slope is close enough to zero, press
Enter .
In a few seconds, the screen will update.
Once zero settling is completed, the information is stored in the
microprocessor, and the instrument automatically returns to the Analyze
mode.