Teledyne 3020M - Explosion proof paramagnetic oxygen analyzer User Manual
Page 46
4 Operation
Model 3020M
4-10
Teledyne Analytical Instruments
Readjust the gas pressure into the analyzer until the flowrate (as read on
the analyzer’s SCCM flowmeter) settles at 700 cc/minute.
If you are using password protection, you will need to enter your
password to gain access to either of these functions. Follow the instructions
in section 4.4 to enter your password. Once you have gained clearance to
proceed, you can ENTER the
ZERO
or
SPAN
function.
4.8.1 Span Cal
SPAN
is used to span calibrate the analyzer. Span calibration can be
performed using the automatic mode, where an internal algorithm compares
consecutive readings from the sensor to determine when the output matches
the span gas concentration. Span calibration can also be performed in
manual mode, where the operator determines when the span concentration
reading is acceptable and manually exits the function.
4.8.1.1
Auto Mode Spanning
Scroll to
SPAN
, and ENTER the
SPAN
function. The screen that
appears allows you to select whether the span calibration is to be performed
automatically or manually. Use the DOWN/UP
control to toggle between
AUTO
and
MAN
span settling. Stop when
AUTO
appears on the display.
Span: Settling: AUTO
Use ENTER to move to the next screen.
Span Val: 20.90
Use DOWN/UP to start changing the oxygen-concentration. Use
ESCAPE/ENTER to blink the digit you are going to modify. Use DOWN/UP
again to change the value of the selected digit. When you have finished
typing in the concentration of the span gas you are using, repeatedly select
ENTER until the rightmost digit is reached, then, the next ENTER will exit the
Span Val
screen. One more ENTER will enter the new span value, bring up
the next screen, and start the span calibration.
#### % Span
Slope=#### ppm/s
The beginning span value is shown in the upper left corner of the
display. As the span reading settles, the screen displays and updates informa-
tion on
Slope
. Spanning automatically ends when the span output corre-
sponds, within tolerance, to the value of the span gas concentration. Then the
instrument automatically returns to the ANALYZE mode.