Span Cal; Auto Mode Spanning - Teledyne 3020T Operating Instructions Manual

Operation
If there are no leaks and the span gas is OK, replace the cell as
described in Chapter 5, Maintenance
After correcting the condition, reset the Cell Fail alarm by placing
the analyzer into, and then back out of, STANDBY.
The "good" reading depends on the sensor your analyzer is using as
well as the known oxygen concentration.

4.8.2 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.
4.8.2.1 A M
UTO ODE
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.
Use ENTER to move to the next screen.
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.
Teledyne Analytical Instruments
S
PANNING
Span: Settling: AUTO
<ENT> For Next
Span Val: 209000.00
<ENT>Span <UP>Mod #
#### ppm Span
Slope=#### ppm/s
Model 3020T
46