Teledyne 7500ZA - Infrared Gas Analyzer - Manual (Page 54)

Settings and Calibration Model 7500ZA
Teledyne Analytical Instruments 38
4. Enter calibration gas concentration for zero and span. Use the UP
or DOWN key to increment or decrement the displayed value
one digit at a time. When the correct number is displayed for that
digit, use the SIDE key to move to the next digit and repeat the
increment/decrement process with the UP/DOWN keys.
5. After setting, save the entry by pressing the ENT key. The saved
value becomes valid with the next calibration event.
Note: Enter calibration parameters settings for each range. If a
zirconia O2 sensor is installed, select 21.00 for the Zero if
air is used for calibration, and use the concentration listed
on the cylinder for the span value.
After saving the calibration values entered, close the Calibration
Parameter screen by pressing ESC. This will return the display to the
previous screen.
Note: Pressing ESC during an entry (before pressing ENT) will
abort the entry leaving the previous entry intact.
Calibration parameter range of value
NOx, SO
2
, CO
2
, CO, CH
4
, external and built in O
2
sensor:
Span: 1-105% of full scale
External O
2
sensor:
Zero: 0-25%
Span: 0.1%-5% (vol.)
Reverse Range:
Zero: 100% (vol.)
Span: 95.25-95.00% (vol.) O
2
The settings cannot be performed beyond the range limits.
6.2.2 Manual Zero Calibration
When setting the zero calibration in manual mode, you can set all
components simultaneously or one by one.