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V2.0
4)
Press the
RUN/STOP
button to start sampling for the zero measurement. Wait for the Y
value for 0 ppm to stabilize and then press the
RUN/STOP
button again.
5)
Connect the inlet to a glass container that is connected to a known concentration
formaldehyde gas standard (e.g., 1.00 ppm formaldehyde gas standard).
6)
Move the cursor to the second row and then press the
ENTER
button. Use
UP
and
DOWN
buttons to select the element to be changed. When the element of the X
column becomes highlighted, use the
UP
and
DOWN
buttons to change the number
and press
ENTER
to confirm the change. Set the number as the concentration level of
the formaldehyde gas concentration to be tested (e.g., 1.00 for 1.00 ppm gas standard
used). Press the
BACK
button to return to the calibrate screen as shown in Figure 6.
7)
Press the
RUN/STOP
button to start sampling. Wait for Y value to stabilize and then
press the
RUN/STOP
button again.
8)
After finishing both samplings, move the cursor back to the first row. Press and hold the
ENTER
button for about two seconds. The instrument will automatically calculate and
update the calibration coefficients based on the new calibration.
9)
After finishing the calibration procedure, press
BACK
to exit.
•
To restore the default settings from the factory calibration, move the cursor and
highlight
RESET
. Press
ENTER
and
RESET
will begin blinking. Press
ENTER
again
and the instrument calibration will be reset back to its factory defaults.
•
One can always bypass the zero-air calibration if it is not necessary. In order to do
so, move the cursor back to the first row after taking the non-zero gas calibration
measurement. Press and hold the
ENTER
button for about two seconds. The
instrument will automatically calculate and update the calibration coefficients based
on the new non-zero gas calibration (SPAN calibration) only.
