Table of Contents
Advertisement
Operation
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 forth.
These are five steps in the zeroing process that the system must
complete, AFTER settling, before it can go back to Analyze.
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.
4.8.1.2 M
ANUAL
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.
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).
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.
Teledyne Analytical Instruments
####
PPM
1 Left=###
M
Z
ODE
EROING
Zero:
Settling: Man
<ENT> To Begin
####
ppm
Slope=####
Model 3020T
Zero
ppm/s
Zero
ppm/s
44
Advertisement
Table of Contents
