700 CLD / O2
5-04-2017
45
Zero
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Zero calibration should be performed before a span calibration.
From the Manual
Calibration menu, press
to access the Manual Zero Calibration screen.
Make sure the analyzer is in the range you wish to calibrate. Use the Up/Down arrows
to go to the desired range. The screen illustration above shows the range (R1)
next to the maximum range limit (3.000 ppm).
In the upper-right corner of the screen, you will see a status line that indicates how the
calibration gas is being introduced into the analyzer. In this case, (Cal) Via Pump is
displayed. The other option is Cal Via Valves. See
Calibration Setup
for details.
Introduce zero gas into the rear of the analyzer. Press
to go to the
Diagnostic
Values
screen
to view the current diagnostic values. Check the temperatures and
pressures to be sure they are within their limits. If all diagnostic values are within their
limits, press the
button to return to the Manual Zero Calibration screen.