Teledyne 7500 Series Operating Instructions Manual page 35

5. In the "Manual Calibration Selection" screen that appears, select "At once" or "Each" by pressing the
UP or DOWN key. When selecting "Both", the CH (components) to be set can be zero-calibrated at the
same time. When selecting "Each", either of the CH (components) to be selected is zero-calibrated. After
setting, press the ENT key, and the calibration you specified is
carried out.
To close "About ZERO Calibration"
To close "About ZERO Calibration" setting or to cancel this
mode midway, press the ESC key. A previous screen will
return.
EXAMPLE
Whether upon selection or at once can be determined for each
CH (component).
•Setting upon selection
Select the CH (component) and then perform zero
calibration on the manual zero calibration
screen.
•Setting at once
At a manual zero calibration, CHs (components) for which "at once" was selected can
simultaneously be calibrated.
* When the zirconia O2 analyzer uses the cylinder air or atmospheric air for the zero gas, select "At once".
Manual Calibration screen
Teledyne Analytical Instruments
35 Model 7500 Instruction Manual