General Monitors S800, Instruction Manual

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Model S800
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Figure 4: Entering Auto-Calibration Sequence
When the magnet is removed from the Calibration switch, the digital display will indicate a
flashing “
AC ” (Figure 5).
Figure 5: “AC” Auto-Calibration Display
The unit is now setting a zero value. When flashing “ AC ” becomes a steady “ AC ”
(approximately 5 seconds), the zero value is now set.
NOTE: zero-air must be used to establish a true zero value.
Apply 2.5% by volume calibration gas. The display will change to “ CP ”. The calibration is
now proceeding (Figure 6).
Figure 6: “CP” Auto-Calibration Display
After approximately two minutes, the display will change to “ CC ”. The calibration is now
complete. Remove the calibration gas (Figure 7). The unit will return to normal operation
when the gas level drops below "0.8% (16% LEL)